PROFESSIONAL ACTIVITIES, HONORS, AWARDS

Scientific Editor, THE ASTROPHYSICAL JOURNAL (Published
by the University of Chicago Press)

Outstanding Faculty Research Award 1989, Villanova University.

Chercheur Associe, Centre Nationale de la Recherche Scientifique
(CNRS), Observatoire Midi-Pyrenees, University of Toulouse
(1990)

Visiting Scientist, Hubble Space Telescope Science Institute
(1991)

Editor of Book: White Dwarfs (Dordrecht,Holland: Kluwer
Press), 1991. (with G.P. Vauclair)

Invited Chapter (Dwarf Novae) ASTROPHYSICAL QUANTITIES,
ed. A.N. Cox, (New York: AIP Press)

Invited Chapter (White Dwarfs) THE ASTRONOMY AND ASTROPHYSICS
ENCYCLOPEDIA, ed.S. Maran, (New York:van Nostrand-Rheinhold)

Editorial Advisory Board Member, INSTITUTE OF PHYSICS PUBLISHING,
Bristol, United Kingdom

Editorial Board, THE ENCYCLOPEDIA OF ASTRONOMY AND ASTROPHYSICS
(IOP Press: On-Line Version)

President of IAU Commission 45 Scientific Session
(23rd General Assembly, Buenos Aires, 1991)

Biographical data in AMERICAN MEN AND WOMEN OF SCIENCE
WHO'S WHO IN THE EAST

PANEL CHAIRMAN, Binary Stars, HUBBLE SPACE TELESCOPE, 1998

HUBBLE SPACE TELESCOPE Peer Review Panel, 1991, 1995

NASA UV/GRAVITY PROGRAM Peer Review, 1991.

PANEL CHAIRMAN, NASA Astrophysics Data Program Peer Review 1993

PANEL CHAIRMAN, NASA EXTREME ULTRAVIOLET EXPLORER Peer Review,
1992

PANEL CHAIRMAN, NATIONAL SCIENCE FOUNDATION Peer Review,
(Degenerate Stars, X-Ray Binaries, Cataclysmic Variables) 1995

PANEL CHAIRMAN, NATIONAL SCIENCE FOUNDATION Peer Review,
(Variable and Binary Stars, Panel D) 1998

NASA ASTROPHYSICS THEORY PROGRAM Peer Review, 1995

NASA X-RAY TIMING EXPERIMENT (XTE) Peer Review, 1995

NASA VOYAGER 2 ULTRAVIOLET SPECTROMETER Peer Review Panel 1992

SESSION CHAIRMAN, 180th Meeting of the American Astronomical
Society, Phoenix, AZ (1992)

SESSION CHAIRMAN, 7th North American Workshop on Cataclysmic
Variables, Seattle, WA

SESSION CHAIRMAN, 185th Meeting of the American Astronomical
Society, Tucson, AZ (1995)

SESSION CHAIRMAN,
The 8th European Workshop on White Dwarf Stars (England)

SESSION CHAIRMAN
The 9th European Workshop on White Dwarf Stars (Germany)

SESSION CHAIRMAN
IAU Colloquium No. 151 "Cataclysmic Variables and Related
Objects" (Keele, UK)

MEMBER, SCIENTIFIC ORGANIZING COMMITTEE
The 7th European Workshop on White Dwarf Stars (France)
The 8th European Workshop on White Dwarf Stars (England)
The 11th European Workshop on White Dwarfs (Norway)
The 12th European Workshop on White Dwarfs (USA)
The 13th European Workshop on White Dwarfs (Italy)

MEMBER, SCIENTIFIC ORGANIZING COMMITTEE
Symbiotic Stars: Probes of Stellar Evolution (La Palma,
Canary Islands)

NASA IUE USERS COMMITTEE (May 1984 - 1986).

NASA IUE PEER REVIEW PANEL MEMBER (1980, 1984, 1985, 1986,
1987, 1988, 1989, 1991, 1992, 1993)

NSF PEER REVIEWER (NATIONAL SCIENCE FOUNDATION)(1978 -
present)

Referee: the Astrophysical Journal, Part 1
the Astrophysical Journal, Part 2 (Letters)
Astronomy & Astrophysics
Astronomy and Astrophysics Letters
Nature
The Astronomical Journal
Publications of the Astronomical Society of the
Pacific

Referee for Observing Proposals:
Canada-France-Hawaii Telescope (CFHT)
Cerro Tololo Inter-American Observatory (CTIO)
Kitt Peak National Observatory (KPNO)

Guest Observer:
Steward Observatory 2.3m, (1983 - 1986)
Multiple Mirror Telescope (1984 - 1986)
Kitt Peak National Observatory 2.1m, 4m (1986- )
Cerro Tololo Inter-American Observatory, 4m (1990- )
Hubble Space Telescope (1990- )
Lowell Observatory (Ohio State 1.8m) (1987- )
NASA Infrared Telescope Facility (IRTF), Mauna Kea
(1990- )

Guest Investigator on Orbiting Spacecraft
EXOSAT Satellite (1985-86)
HIGH ENERGY ASTROPHYSICAL OBSERVATORY
(HEAO-B x-ray satellite)
INTERNATIONAL ULTRAVIOLET EXPLORER (IUE)
Satellite (1979 - present)
ROSAT Satellite (1992-93)
EXTREME ULTRAVIOLET EXPLORER (EUVE)
HUBBLE SPACE TELESCOPE
VOYAGER 2
FAR ULTRAVIOLET SPECTROSCOPIC EXPLORER (FUSE)

INVITED SCIENTIFIC COLLOQUIA

Columbia University, The State University of New York at Stony Brook, The University of Kansas, The European Space Agency (VILSPA, Spain), The University of Leicester (England), Florida Institute of Technology, West Chester State University, University of California at Berkeley, University of Zurich, University of Arizona, Arizona State University, University of Denver, Widener University, University of Colorado, University of Maryland, Johns Hopkins University, Space Telescope Science Institute, Kitt Peak National Observatory, The University of Delaware/Bartol Research Institute, Haverford/Bryn Mawr Colleges, Los Alamos National Laboratory, University of Bamberg (Germany), University of Toulouse/Observatoire Midi-Pyrenees, Pennsylvania State University, Shanghai Observatory, University of Hong Kong, Hong Kong University of Science and Technology, University of Science and Technology of China, Hefei, Chinese Academy of Sciences (Shanghai)

PROFESSIONAL AND HONORARY SOCIETIES

International Astronomical Union
IAU Commissions 35, 45, 42: Stellar Constitution, Stellar
Classification, Interacting Binaries
American Astronomical Society
Fellow of the Royal Astronomical Society (Great Britain)
Astronomical Society of the Pacific
American Association for the Advancement of Science
Sigma Pi Sigma (Physics Honor Society)
Sigma Xi (Honorary Scientific Research Society)
American Association of Variable Star Observers

APPOINTMENTS

January 1991-July 1991. Visiting Scientist, Hubble Space Telescope
Science Institute.

July 1990-December 1990. Chercheur Associe, Centre National de la
Recherche Scientifique (Observatoire Midi-Pyrenees), University
of Toulouse.

September 1988-present. Professor of Astronomy and Astrophysics,
Villanova University

September 1983 - 1985. Visiting Associate Professor of Physics,
Arizona State University

December 1983 - August 31, 1988. Associate Professor of Astronomy and
Astrophysics, Villanova University

September 1975 - December 1983. Assistant Professor of Astronomy.

May 1971 - May 1975. Teaching Fellow, University of Pennsylvania

SCIENTIFIC RESEARCH GRANTS AWARDED

National Science Foundation
AST 78-13396
"Statistics of Spectroscopically Identified White Dwarfs"
Principal Investigator (with G. P. McCook)

National Science Foundation
ASR 78-13396-AO2
"A New White Dwarf Spectral Classification"
Principal Investigator (with G. P. McCook)

National Aeronautics and Space Administration
NASA NSG 5375
"Ultraviolet Observations of Hot Dwarfs in Binary Systems"
Principal Investigator (with E. F. Guinan)

National Aeronautics and Space Administration
NASA OD 23B
"Phase Dependent Observations of the White Dwarf Eclipsing Binary
V471 Tauri"
(Co-Principal Investigator)

National Aeronautics and Space Administration
NASA NAG5-260
"High Resolution Ultraviolet Observations of Hot Helium-Rich
White Dwarfs"
Principal Investigator (with J. Liebert and F. Wesemael)

National Aeronautics and Space Administration
NASA HEAO-B
"Coronas of White Dwarf Stars"*
Co-Investigator (with H. L. Shipman, Principal Investigator)
*This grant was competitively awarded but the X-ray satellite
HEAO-B failed before the research could be completed.

National Aeronautics and Space Administration
NASA NSG 7385
"Ultraviolet Studies of Nova-Like Variables"
Co-Principal Investigator (with E. F. Guinan)

National Aeronautics and Space Administration
NASA NAG5-343A
"Ultraviolet Studies of the Very Hot, Pulsating Helium-Rich
`PG1159' Degenerate Stars"
Principal Investigator (with R. F. Green and J. Liebert)

National Aeronautics and Space Administration
NASA NAG5-343B
"High Resolution Ultraviolet Observations of Subdwarf B Stars"
Principal Investigator (with G. Fontaine and F. Wesemael)

National Aeronautics and Space Administration
NASA NAG5 343C
"Continued Ultraviolet Studies of UX Ursa Majoris Stars"
Principal Investigator (with E. F. Guinan)

National Aeronautics and Space Administration
NASA IUE
"Ultraviolet Observations of Hot DA White Dwarfs"
Co-Investigator (with J. Holberg, Principal Investigator)

National Aeronautics and Space Administration
NASA IUE
"A High Dispersion Spectrum of the Hot Pulsating White Dwarf
PG1159-035"
Co-Investigator (with J. Liebert, Principal Investigator)

National Aeronautics and Space Administration
NASA NAG 5-343D
"Echelle Studies of Diffusion, Abundances and Evolution of the
Hottest DO White Dwarfs"
Principal Investigator

National Aeronautics and Space Administration
NASA NAG 5-343E
"Spectroscopy of Pre-Cataclysmic Binaries from the Palomar Green
and Proper Motion Surveys"
Principal Investigator

National Science Foundation
NSF AST85-17125 (2 yr)
"Current Problems on the Formation and Evolution of White Dwarf
Stars"
Principal Investigator

European Space Agency
"EXOSAT Observations of V471 Tauri"
Co-Investigator (with K. Jensen, Principal Investigator)

National Aeronautics and Space Administration
NASA NAG 5-343F
"Expanding Circumbinary Gas Around V471 Tauri"
Principal Investigator

National Aeronautics and Space Administration
NASA NAG 5-343G
"IUE Echelle Studies of Mass Loss, Accretion and Chromospheric
Structure in V471 Tauri"
Principal Investigator

National Aeronautics and Space Administration
NASA NAG 5-343H
"IUE Echelle Studies of Hot Helium Rich White Dwarfs"
Principal Investigator

National Aeronautics and Space Administration
NASA NAG 5-343I
"IUE Studies of Convective Dredgeup, Mixing and Accretion in
the Hot DB Star GD358"
Principal Investigator

National Science Foundation
NSF AST88-02689
"White Dwarfs in Wide Binary Systems: Physical Parameters and
Comparisons to Single Degenerate Stars"
Principal Investigator

National Aeronautics and Space Administration
NASA NAG5-343J
"IUE Echelle Studies of Accretion, Diffusion and Convective
Dredgeyup in the Pulsating DB Degenerate GD358
Principal Investigator

National Aeronautics and Space Administration
"An Ultraviolet Study of Long Term Heating and Cooling of
White Dwarfs in Cataclysmic Variables"
NASA NAG5-
Co-Investigator (Dr. P. Szkody, Principal Investigator)

National Aeronautics and Space Administration
NASA NAG5-343K
"IUE Echelle Observation of PG0112+104"
Principal Investigator

National Aeronautics and Space Administration
NASA NAG5-343L
"IUE Echelle Observation of LDS678A"
Principal Investigator

National Aeronautics and Space Administration
NASA NAG5-1284(2yrs), Astrophysics Data Analysis Program
"An IUE Archival Search for Ancient Nova Shells"
Principal Investigator (Dr. S. Starrfield, Co-Investigator)

National Aeronautics and Space Administration
NASA NAG5-343M
"Evolutionary Status of Helium Transfer Cataclysmics"
Principal Investigator

National Aeronautics and Space Administration
NASA NAG5-343N
"IUE Echelle Studies of the Very Luminous ROSAT EUV Source
WFC 1631+782"
Principal Investigator

National Science Foundation
NASA AST90-16283 (3 yrs)
"White Dwarfs in Wide Binary Systems"
Principal Investigator

NASA Long Term Space Astrophysics Grant (5 years)
NASA Grant NAGW-3158
"White Dwarfs in Cataclysmic Variables"
Principal Investigator

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE (Cycle 1)
Grant GO-2593.01-91A
"White Dwarf Stars"
Co-Investigator

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE (Cycle 2)
Grant GO3816.01-91A
"White Dwarf Stars"
Co-Investigator

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE (Cycle 2)
Grant GO3836.01-91A
"Hubble Space Telescope Spectroscopic Observations of the
Exposed White
Dwarfs in the Dwarf Novae U Geminorum, WZ Sagittae and VW
Hydri During Quiescence"
Principaal Investigator

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE (Cycle 3)
Grant GO4344.01-91A
"The Mass of the White Dwarf in V471 Tauri"
Co-Investigator

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE (Cycle 4)
Grant GO4889.01-94A
"Origin of the Ultrahigh-Ionization O VIII
Emission Lines in Two Exceptional (Pre-) White Dwarfs:
KPD0005+5106 and RXJ2117.1+3412"
Co-Investigator

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE (Cycle 4)
Grant GO4344.01-93A
"The Mass of the White Dwarf in V471 Tauri"
Co-Investigator

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE (Cycle 4)
Grant GO5412.01-941A
"GHRS Observations of the White Dwarf in U Geminorum
During Quiescence:The Boundary Layer-White Dwarf
Connection"
Principal Investigator

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE (Cycle 5)
Grant GO6084.01-95A
"The Masses, Chemical Abundances and Rotation Rates
of the White Dwarfs in WZ Sagittae and VW Hydri"
Principal Investigator

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE (Cycle 5)
Grant GO6085.01-95A
"GHRS Spectroscopy of AM Canum Venaticorum:
The Cataclysmic-DB Connection"
Principal Investigator

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE (Cycle 5)
Grant GO-5160.01-95A
"A Spectrum of the Bright, Mysterious White Dwarf Star
Procyon B"
Co-Investigator

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE (Cycle 5)
Grant GO-6088.01-95A
"The Chromosphere of V471 Tauri
Co-Investigator

National Aeronautics and Space Administration
Extreme Ultraviolet Explorer
Grant NAG5-2767
"The U Geminorum Boundary Layer
Co-Investigator

National Aeronautics and Space Administration
Extreme Ultraviolet Explorer
Grant NAG5-2303
"The Accretional Heating of VV Puppis and BL Hydri"
Co-Investigator

National Aeronautics and Space Administration
ASCA X-Ray Observatory
"ASCA Observations of the Dwarf Nova U Geminorum"
Co-Investigator (P. Szkody, PI)

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE (Cycle 5)
Grant GO6172.01-95A
"Supersonic Velocity Dispersions in Dwarf Nova
Accretion Disks"
Principal Investigator (Fuhua Cheng, Co-I)

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE (Cycle 6)
Grant GO6558.01-96A
"The Accreting Magnetic White Dwarf in AM Her:
Heating, Chemical Composition and Mass"
Principal Investigator

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE (Cycle 6)
Grant GO-6628.01-96A
"The Wind and Photosphere of the Unique DO White Dwarf
RE0503-289"
Co-Investigator

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE (Cycle 6)
Grant GO6489.01-96A
"The Identification and Cooling of the White Dwarf
in AL Com"
Co-Investigator

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE (Cycle 6)
Grant GO-6700.01-96A
"GHRS Spectroscopy of the High Accretion Rate Dwarf
Nova RX Andromeda"
Principal Investigator

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE (Cycle 8)
Grant GO-8139 Pending
"Probing an Ancient Thermonuclear Runaway on a White Dwarf
in a Dwarf Nova"
Principal Investigator

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE (Cycle 8)
Grant GO-8103 Pending
"A Global Picture of CV White Dwarfs"
Principal Investigator

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE (Cycle 8)
Grant GO-8278
"Two Post-Common Envelope Binaries in the Hyades Cluster"
Principal Investigator

National Aeronautics and Space Administration
HUBBLE SPACE TELESCOPE
Grant AR-7300
"An HST Archival Study of White Dwarfs in Cataclysmic Variables"
Principal Investigator

National Aeronautics and Space Administration
Astrophysics Data Program
Grant NAG-8388
"New Insights into Cataclysmic Variable White Dwarfs
From the IUE NEWSIPS ARCHIVE"
Principal Investigator

National Aeronautics and Space Administration
Astrophysics Data Program
Grant NAG-Number Pending
"The Properties of Accretion Disks and White Dwarfs During
Dwarf Nova Quiescence"
Principal Investigator

National Science Foundation
NASA AST99-01955 (3 yrs)
"White Dwarfs in Cataclysmic Variables"
Principal Investigator

SCIENTIFIC RESEARCH PUBLICATIONS

ON ACCRETION AND CONVECTIVE ENVELOPES IN DB WHITE DWARFS,
Bulletin American Astronomical Society 3, 395 (1971).
E. M. Sion.

ARE ACCRETING DA WHITE DWARFS THE PROGENITORS OF DB WHITE
DWARFS? Astrophysical Letters 14, 219, (1973). E. M.
Sion.

NON-ADIABATIC RADIAL OSCILLATIONS AND PULSATIONAL STABILITY OF HOT
DEGENERATE DWARFS, Thesis, University of Pennsylvania,
Philadelphia, USA (University Microfilms, Order No. 75-24, 129),
(1975). E. M. Sion.

X-RAY SOURCES AND THE PULSATIONAL PROPERTIES OF HIGH
LUMINOSITY DEGENERATE STARS, Invited Paper, the 19th
Liege International Astrophysical Colloquium on PROBLEMS
IN STELLAR HYDRODYNAMICS, held at Liege, Belgium, July 8,
9 and 10, Memories Societe Royale des Sciences De
Liege , 6 e serie tome VI, pp. 227-232 (1974). E. M.
Sion and S. C. Vila.

THE PULSATIONAL PROPERTIES OF HOT DEGENERATE DWARFS WITH
NUCLEAR REACTIONS NEAR THE SURFACE, Bulletin American
Astronomical Society 7, 442 (1975).

KINEMATICS OF NEWLY OBSERVED WHITE DWARFS, Bulletin American
Astronomical Society 7, 513 (1975). E. M. Sion, J. A.
Bangert, D. A. Turnshek and J. Liebert.

THE PULSATIONAL PROPERTIES OF HIGH LUMINOSITY DEGENERATE
STARS WITH HELIUM BURNING NEAR THE SURFACE, Astrophysical
Journal 209, 850 (1976). E. M. Sion and S. C. Vila.

SPACE MOTIONS AND ATMOSPHERIC ABUNDANCES OF WHITE DWARFS,
Bulletin American Astronomical Society 8, 335 (1976).
E. M. Sion and D. A. Turnshek.

THE PULSATIONAL PROPERTIES OF HIGH LUMINOSITY DEGENERATE STARS
WITH HYDROGEN BURNING NEAR THE SURFACE, Astrophysical Journal
207, 820 (1976). S. C. Vila and E. M. Sion.

NUMBER-ABSOLUTE MAGNITUDE DISTRIBUTION AND KINEMATICS OF
WHITE DWARFS, Invited Paper, the Second European Workshop
on White Dwarfs, held at Rome, Italy, September 10, 11,
12, 13 and 14, Memorie della Societa Astronomica
Italiana 48, 8 (ed. V. Weidemann; abstract), (1976).
E. M. Sion.

SPACE MOTIONS AND LUMINOSITY FUNCTION OF WHITE DWARFS,
Astrophysical Journal 213, 468 (1977). E. M. Sion and
J. W. Liebert.

A CATALOGUE OF SPECTROSCOPICALLY IDENTIFIED WHITE DWARFS,
Villanova University Observatory Contributions Number Two
(1977). G. P. McCook and E. M. Sion.

THE EVOLUTION AND THERMAL STABILITY OF HOT MASSIVE DEGENERATE
STARS WITH ACCRETED HYDROGEN ENVELOPES, Bulletin American
Astronomical Society 9, 359 (1977). E. M. Sion, M. J.
Acierno and D. A. Turnshek.

THE THERMAL STABILITY OF HOT DEGENERATE STARS IN STEADY-STATE
ACCRETION, Astrophysical Journal 220, 636 (1978). E.
M. Sion, M. J. Acierno and D. A. Turnshek.

ON THE KINEMATICS OF THE VARIABLE DA STARS, Publications of
the Astronomical Society of the Pacific 90, 154 (1988).
E. M. Sion, G. Lupie, and K. Young.

EVOLUTIONARY MODELS OF MASSIVE ACCRETING WHITE DWARFS,
Bulletin American Astronomical Society 9, 634 (1978).
E. M. Sion, M. J. Acierno and S. Tomczyk.

HYDROGEN SHELL FLASHES IN MASSIVE ACCRETING WHITE DWARFS,
Astrophysical Journal 220, 636 (1979). E. M. Sion, M.
J. Acierno and S. Tomczyk.

IS THE RELATIVE FREQUENCY OF MAGNETIC WHITE DWARFS HIGHER
AMONG HOT STARS THAN COOL STARS? Astrophysical Letters
20, 53 (1979). J. Liebert and E. M. Sion.

ON THE ORIGIN OF THE C2 (4670) WHITE DWARFS: Bulletin American
Astronomical Society 10, 677 (1979). E. M. Sion, J. L.
Fragola and W. C. O'Donnell.

STATISTICAL ANALYSIS OF THE ENLARGED SPECTROSOPIC WHITE DWARF
SAMPLE, Bulletin American Astronomical Society 11, 473
(1979). E. M. Sion, G. P. McCook and M. K. Hart.

ON THE EVOLUTIONARY STATUS OF THE CARBON BAND WHITE DWARFS,
Publications of the Astronomical Society of the Pacific
91, 460 (1979). E. M. Sion, J. L. Fragola and W. C.
O'Donnell.

ACCRETING DOUBLE SHELL SOURCE DEGENERATE STARS (1979), in
White Dwarfs and Variable Degenerate Stars (ed. H.
M. Van Horn and V. Weidemann, University of Rochester
Press, (1979), p. 530. E. M. Sion.

STATISTICAL INVESTIGATIONS OF THE LUMINOSITY, DISTRIBUTION OF
THE SPECTROSCOPIC WHITE DWARF SAMPLE (1979), in White
Dwarfs and Variable Degenerate Stars (ed. H. M. Van
Horn and V. Weidemann, University of Rochester Press,
1979), p. 245. E. M. Sion.

IUE ULTRAVIOLET SPECTRA OF THE WHITE DWARF ECLIPSING BINARY V
471 TAURI (=BD+16 516), Bulletin American Astronomical
Society 11, 683 (1980). E. F. Guinan and E. M. Sion.

PHASE DEPENDENT OBSERVATIONS OF THE NOVA-LIKE VARIABLE TT
ARIETIS, in The Universe at Ultraviolet Wavelengths: The
First Two Years of the IUE NASA CP2171, p. 477,
(1980). E. F. Guinan and E. M. Sion.

ON THE NATURE OF THE NOVA-LIKE VARIABLE CD-42 14462, in The
Universe at the Ultraviolet Wavelengths: The First Two
Years of the IUE (NASA CP2171), p. 471, (1980). E. F.
Guinan and E. M. Sion.

V 471 TAU, IAU Circular No. 3428, (1979). E. F. Guinan and
E. M. Sion.

VISIBLE BAND AND THE IUE OBSERVATIONS OF MU SAGITTARII, in
The Universe at the Ultraviolet Wavelengths: The First
Two Years of IUE (NASA CP2171, p. 381, 1981). D.
Dorren, E. F. Guinan and E. M. Sion.

SPECTROPHOTOMETRIC ANALYSIS OF THE HOT WHITE DWARF HD
149499B, Bulletin American Astronomical Society 12,
465, (1980). E. M. Sion, E. F. Guinan and F. Wesemael.

A PROPOSED NEW WHITE DWARF SPECTRAL CLASSIFICATION, Bulletin
American Astronomical Society 12, 456 (1980). E. M. Sion.

THERMONUCLEAR INSTABILITIES IN ACCRETING DEGENERATE STARS
WITH TWO NUCLEAR SHELL SOURCES, Bulletin American
Astronomical Society 12, 849 (1980). E. M. Sion.

SPECTROPHOTOMETRIC ANALYSIS OF THE HOT HELIUM-RICH WHITE
DWARF HD 149499B, Astrophysical Journal 255, 232
(1982). E. M. Sion, E. F. Guinan and F. Wesemael.

A COMPLETE OPTICAL LIGHT CURVE OF THE HYADES ECLIPSING BINARY
V471 TAURI WITH THE IUE SATELLITE, Information Bulletin
on Variable Stars No. 1922 (1981). E. F. Guinan and E.
M. Sion.

ULTRAVIOLET SPECTROSCOPY OF THE NOVA-LIKE VARIABLE V 3885 Sag
(CD-42o14462), Astrophysical Journal 258, 217 (1982). E. F.
Guinan and E. M. Sion.

AN ULTRAVIOLET STUDY OF THE WHITE DWARF AND K2V COMPONENTS OF
THE CLOSE ECLIPSING BINARY V471 TAURI, Bulletin American
Astronomical Society 13, 817 (1981). E. F. Guinan and
E. M. Sion.

HIGH RESOLUTION IUE SPECTRA OF THE HOT HELIUM RICH WHITE DWARF
HD149499B, Bulletin American Astronomical Society 13, 811
(1982). E. M. Sion and E. F. Guinan.

THE NOVA-LIKE VARIABLE KQ MON AND THE NATURE OF THE UX URSA
MAJORIS STARS, in Advances in Ultraviolet Astronomy:
Four Years of IUE Research (NASA) CP2238, p. 460, (1982).
E. M. Sion and E. F. Guinan.

A PROPOSED NEW WHITE DWARF SPECTRAL CLASSIFICATION SYSTEM,
Astrophysical Journal, 269, 253 (1983). E. M. Sion, J.
L. Greenstein, J. Landstreet, J. Liebert, H. L. Shipman
and G. A. Wegner.

HIGH VELOCITY GAS OUTFLOW FROM A NOVA-LIKE VARIABLE LSI 55 8,
in Advances in Ultraviolet Astronomy: Four Years of
IUE Research (NASA CP2238, p. 465, 1982). E. F. Guinan
and E. M. Sion.

AN ULTRAVIOLET INVESTIGATION OF THE UNUSUAL ECLIPSING BINARY
SYSTEM FF AQR, in Advances in Ultraviolet Astronomy:
Four Years of IUE Research (NASA CP2238, p. 517,
1982). J. D. Dorren, E. F. Guinan and E. M. Sion.

THE HOT DO WHITE DWARF HD 149499B: EINSTEIN REDSHIFT OF A DB
PROGENITOR WITH CARBON FEATURES, Astrophysical Journal
(Letters) 265, L87 (1983). E. M. Sion and E. F.
Guinan.

KQ MON AND THE NATURE OF THE UX URSA MAJORIS STARS, in
Cataclysmic Variables and Related Objects, IAU Colloquium
No. 72, ed. M. Livio and G. Shaviv (Reidel: Dordrecht,
Holland) p. 414 (1983). E. M. Sion and E. F. Guinan.

UPPER LIMIT ROTATIONAL VELOCITIES OF HOT WHITE DWARFS FROM
HIGH RESOLUTION IUE SPECTRA, Bulletin American
Astronomical Society 14, 915 (1983). E. M. Sion and
F. Wesemael.

THE PECULIAR WHITE DWARF GD323: A STRATIFIED H/HE
ATMOSPHERE?, Astrophysical Journal, 277, 692 (1984).
J. Liebert, F. Wesemael, E. M. Sion and G. Wegner.

THE LUMINOSITY FUNCTION OF COOL WHITE DWARFS, in proceedings
of IAU Colloquium No. 76, The Nearby Stars and the
Stellar Luminosity Function, ed. by A. G. D. Phillip.
(Reidel: Dordrecht, Holland), p. 103, (1983). J.
Liebert, C. C. Dahn and E. M. Sion.

IUE SPECTROPHOTOMETRY OF THE DA4 PRIMARY IN THE RED DWARF -
WHITE DWARF SPECTROSCOPIC BINARY CASE 1, Astrophysical
Journal 279, 758 (1983). E. M. Sion, F. Wesemael and
E. F. Guinan.

IUE SPECTROSCOPY OF THE DEGENERATE COMPONENTS IN THE HYADES,
CLOSE BINARIES V471 TAURI AND HZ9, Astronomical Journal,
89, 1252 (1984). E. F. Guinan and E. M. Sion.

IUE SPECTROPHOTOMETRY OF THE HOT, HELIUM-RICH PG1159 DO
DEGENERATES, NASA Symposium: The Future of Ultraviolet
Astronomy Based on Six Years, NASA CP2349, p.213
(1984). E. M. Sion, J. Liebert, S. Starrfield and
F.Wesemael.

HIGH RESOLUTION ABUNDANCES ANALYSIS OF SUBDWARF B STARS,
NASA Symposium: The Future of Ultraviolet Astronomy
Based on Six Years , NASA CP2349, p. 273 (1984). With R.
LaMontagne, G. Fontaine, F. Wesemael and E. M. Sion.

HYDRODYNAMIC SIMULATIONS OF RECURRENT NOVAE, NASA Symposium:
The Future of Ultraviolet Astronomy Based on Six
Years, NASA CP2349, p. 313 (1984). With S. Starrfield,
J. Turan, W. Sparks and E. M. Sion.

A CATALOGUE OF SPECTROSCOPICALLY IDENTIFIED WHITE DWARFS, 2nd
Edition. Villanova University Observatory Contribution
#3 (1984). G. P. McCook and E. M. Sion.

IMPLICATIONS OF THE ABSOLUTE MAGNITUDE DISTRIBUTION FUNCTIONS
OF DA AND NON-DA WHITE DWARFS, Astrophysical Journal,
282, 612 (1984). E. M. Sion.

HIGH RESOLUTION IUE OBSERVATIONS OF THE HOT DO WHITE DWARF
PG1034+001, Bulletin American Astronomical Society 15,
984, (1984). E. M. Sion, F. Wesemael and J.Liebert.

SPECTRAL ANALYSIS OF HIGH DISPERSION IUE DATA FOR TWO HOT
SUBDWARF B STARS, Bulletin American Astronomical Society
15, 984 (1984). R. LaMontagne, G. Fontaine, F.
Wesemael and E. M. Sion.

THE PECULIAR DAB WHITE DWARF GD 323. Bull. A.A.S., 15, 655
(1984). F. Wesemael, J. Liebert, E. M. Sion, G. Wegner.

DETECTION AND ANALYSIS OF PHOTOSPHERIC CNO FEATURES IN THE
HOT DO WHITE DWARF, PG1034+1001, Astrophysical Journal,
292, 477 (1985). E. M. Sion, J. Liebert and F.
Wesemael.

FEIGE 24: WIND/FLARE ACCRETION BY A HOT DAZ1 DEGENERATE,
Astrophysical Journal 286, 760 (1984). E. M. Sion and
S. Starrfield.

DISCOVERY OF A NEW MAGNETIC WHITE DWARF WITH A 30-MEGA-GAUSS
FIELD, KUV813-14, Bulletin American Astronomical Society
16, 725 (1984). E. M. Sion, J. Liebert, G. Schmidt and
S. Starrfield.

ON THE OBSERVED PROPERTIES AND LONG TERM STRUCTURE AND
EVOLUTION OF WHITE DWARFS IN CATACLYSMIC VARIABLES,
Bull. A.A.S. 16, 945 (1984). E. M. Sion.

PLANETARY NEBULA CENTRAL STARS, Invited Review Article for the
Report of IAU Commission 35 to the XIXth General Assembly
of the International Astronomical Union, New Delhi,
India, IAU Transactions V. XIX A, p. 479 (1985).
E.M.Sion.

THE KINEMATICS OF COOL WHITE DWARFS WITH METALS AND THE LOCAL
INTERSTELLAR MEDIUM, Bulletin American Astronomical
Society 16, 965 (1985). P. Aannestad and E. M. Sion.

DISCOVERY OF OXYGEN IN THE PG 1159 DEGENERATE STARS: A DIRECT
EVOLUTIONARY LINK TO OVI PLANETARY NEBULA NUCLEI AND
CONFIRMATION OF PULSATION THEORY, Bulletin American
Astronomical Society 16, 965 (1985). E. M. Sion, J.
Liebert and S. Starrfield.

DISCOVERY OF TWO UNIQUE, SUBLUMINOUS, HOT STARS. Bull. A.A.S.,
16, 966 (1985). D. Crampton, A. P. Cowley, and E. M. Sion.

STUDIES OF HOT B SUBDWARFS III CARBON, NITROGEN AND SILICON
ABUNDANCES IN THREE sdB STARS, Astrophysical Journal,
299, (1985). R. LaMontagne, F. Wesemael, G.
Fontaine and E. M. Sion.

THE OBSERVED PROPERTIES AND LONG TERM STRUCTURE AND EVOLUTION
OF WHITE DWARFS IN CATACLYSMIC VARIABLES, Astrophysical
Journal 297, 538 (1985). E. M. Sion.

DISCOVERY OF OXYGEN IN THE PG1159 DEGENERATE STARS: A DIRECT
EVOLUTIONARY LINK TO THE OVI PLANETARY NEBULA NUCLEI AND
CONFIRMATION OF PULSATION THEORY, Astrophysical Journal
292, 471 (1985). E. M. Sion, J. Liebert and S.
Starrfield.

ON THE NATURE OF THE UX URSA MAJORIS NOVA-LIKE VARIABLES:
CPD-48 1577, Astrophysical Journal 292, 601 (1985).
E. M. Sion.

TWO NEW COLOR-SELECTED MAGNETIC DA WHITE DWARFS: Publications
of the Astronomical Society of the Pacific 97, 158,
(1985). J. Liebert, G. Schmidt, E. M. Sion, S. G.
Starrfield, R. F. Green and T. Boronson.

THE KINEMATICS OF COOL METAL LINE WHITE DWARFS AND ACCRETION
IN THE LOCAL INTERSTELLAR MEDIUM, Astronomical Journal
90, 1832 (1985). P. Aannestad and E. M. Sion.

TWO, UNIQUE, SUBLUMINOUS, HOT STARS: DAB DEGENERATES?
Publications of the Astronomical Society of the Pacific,
97, 838 (1985). E. M. Sion , D. Crampton, and A. P.
Cowley.

ON THE EVOLUTIONARY STATE OF CATACLYSMIC VARIABLE WHITE
DWARFS AND THEIR RECURRENCE TIMES, Astrophysical Journal,
303, 130 (1986). E. M. Sion and S. G. Starrfield.

ON THE LONG TERM EVOLUTION OF WHITE DWARFS IN CATACLYSMIC
VARIABLES AND THEIR RECURRENCE TIMES, PROCEEDINGS OF
"RECENT RESULTS ON CATACLYSMIC VARIABLES," (ESTEC:
Noorwijk), (ESA SP236) p. 41 (1985). E. M. Sion and S. G.
Starrfield.

PROBABLE DISCOVERY OF A STELLAR WIND IN THE PRE-CATACLYSMIC
BINARY V471 TAURI, Bulletin American Astronomical Society
17, 753 (1985). F. C. Bruhweiler and E. M. Sion.

DETECTION AND ANALYSIS OF PHOTOSPHERIC METALS IN THE PECULIAR
DOZI DEGENERATE, KPD0005+5106, Bulletin American
Astronomical Society 17, 839 (1986), E. M. Sion, R.
Downes and J. W. Liebert.

TEMPERATURES FOR HOT AND PULSATING DB WHITE DWARFS OBTAINED
WITH THE IUE OBSERVATORY, Astrophysical Journal 309,
241 (1986). J. Liebert, F. Wesemael, C. J. Hansen, G.
Fontaine, H. L. Shipman, E. M. Sion, D.E. Winget and R.
F. Green.

NEWLY OBSERVED DEGENERATE STARS AND RELATED OBJECTS FROM THE
PRAESEPE, CASE AND KISO SURVEYS, Publication of the
Astronomical Society of the Pacific 98, 552 (1986).
R. M. Wagner, E. M. Sion, J. Liebert, S. G. Starrfield
and N. Zotov.

EFFECTIVE TEMPERATURES FOR HELIUM-RICH (DB) WHITE DWARFS
USING THE IUE OBSERVATORY, in IAU Colloquium 87,
Hydrogen Deficient Stars and Related Objects , 10-15
November, 1985, Mysore, India, Reidel: Dordrecht, in
press. J. Liebert, F. Wesemael, C. Hansen, G. Fontaine,
H. L. Shipman, E. Sion, D. Winget, and R. F. Green.

ULTRAVIOLET OBSERVATIONS OF V471 TAURI: EVIDENCE FOR A
NOVA-LIKE OUTBURST?, Astrophysical Journal Letters,
304, L21 (1986). F. C. Bruhweiler and E. M. Sion.

FURTHER OBSERVATIONS OF THE PECULIAR HOT HELIUM-RICH
DEGENERATE KPD0005+5106, Astrophysical Journal 321, 943
(1987). R. Downes, E. M. Sion, J. Liebert, and J. B.
Holberg

HIGH VELOCITY EXPANDING GAS AROUND THE PRE-CATACLYSMIC BINARY
V471 TAURI, Proceedings of the Conference "RS OPH and the
Recurrent Nova Phenomenon" ed. Bode, M. F., (VNU Science
Press), in press (1986). F. C. Bruhweiler and E. M.
Sion.

RECENT ADVANCES ON THE FORMATION AND EVOLUTION OF WHITE
DWARFS, Invited review article for Publications of the
Astronomical Society of the Pacific, 98, 821 (1986).
E. M. Sion.

A HIGH RESOLUTION IUE SPECTRUM OF THE LINE OF SIGHT TO NOVA
CORONA AUSTRINAE 1981, Astronomical Journal 92, 1145
(1986). E. M. Sion, S. G. Starrfield, M. Van Steenberg,
W. B. Sparks, J. Turan, and R. E. Williams.

EXOSAT OBSERVATIONS OF V471 TAURI; I. A 9.25 MINUTE PULSATION
FROM THE WHITE DWARF AND ORBITAL PHASE DEPENDENT X-RAY
ABSORPTION DIPS, Astrophysical Journal Letters 309,
1627 (1986). K. A. Jensen, J. H. Swank, R. Petre, E. F.
Guinan, E. M. Sion, H. L. Shipman.

CBS78: A SECOND EXTREMELY RARE DBZ DEGENERATE STAR WITH
ACCRETED CALCIUM, Astrophysical Journal Letters 308,
L67 (1986). E. M. Sion, Harry L. Shipman, R. Mark
Wagner, James Liebert and S. G. Starrfield.

PRELIMINARY MMT RESULTS ON WHITE DWARF RADIAL VELOCITIES,
Memorie della Societa Astronomica Italiana 58, 63
(1987). S.J. Kenyon, E. M. Sion, and P. A. Aannestad.

NEWLY IDENTIFIED WHITE DWARFS FROM THE CASE LOW DISPERSION
NORTHERN SKY SURVEY, Memorie della Societa Astronomica
Italiana 58, 89 (1987). E. M. Sion, R. M. Wagner, J.
Liebert and S. G. Starrfield.

THE EFFECTIVE TEMPERATURES OF WHITE DWARFS IN CATACLYSMIC
VARIABLES VERSUS CV TYPE AND ORBITAL PERIOD, Proceedings
of IAU Colloquium No. 93 "Cataclysmic Variables" (Reidel:
Dordrecht), Astrophys. Sp.Sci. 131, 47 (1987). E. M. Sion.

THE HISTORICAL RECORD FOR SIRIUS: THERMONUCLEAR RUNAWAY ON A
WHITE DWARF? Nature 324, 235. F. Bruhweiler, Y.
Kondo and E. M. Sion.

ON THE 9.25 MINUTE X-RAY OSCILLATIONS OF V471 TAURI,
Proceedings of the Conference "Stellar Pulsation: A
Memorial to John P. Cox" (ed. A. N. Cox; Berlin:
Springer-Verlag), p.396 (1987), E. M. Sion.

THE KINEMATICS AND SPATIAL DISTRIBUTION OF DZ WHITE DWARFS
AND THE LOCAL INTERSTELLAR MEDIUM, Bulletin American
Astronomical Society 18, 952 (1987). P. Aannestad and
E.M. Sion.

RETICON SPECTROSCOPIC SURVEYING OF THE CASE BLUE STARS,
Bulletin American Astronomical Society 18, 952 (1987).
R. M. Wagner, E. M. Sion, S. G. Starrfield, and J.
Liebert.

HIGH RESOLUTION ULTRAVIOLET OBSERVATIONS OF V471 TAURI:
EVIDENCE FOR ACCRETION AND WIND/FLARE MASS LOSS FROM THE
K2V STAR?, Bulletin American Astronomical Society 18,
978 (1987). E. M. Sion and F. C. Bruhweiler.

HOT SUBLUMINOUS STARS AND BLUE OBJECTS IN THE CASE LOW
DISPERSION NORTHERN SKY SURVEY, Astrophysical Journal
328, 213 (1988). R. Mark Wagner, E.M. Sion, J. Liebert, and
S. Starrfield.

A NEW LOOK AT THE SPACE MOTIONS OF THE WHITE DWARF
SPECTROSCOPIC SUBGROUPS, Proceedings of the Second
Conference on Faint Blue Stars (IAU Colloquium No.95: L.
Davis Press:Schenectady, ed. A.G.D. Philip, D.S. Hayes,
and J. Liebert), 645 (1988). J. McMullin, M. Fritz, and
E. Sion.

WHITE DWARFS IN CATACLYSMIC VARIABLES, Invited Review paper,
Proceedings of the Second Conference on Faint Blue Stars
(IAU Colloquium No. 95: L. Davis Press:Schenectady,
ed. A.G.D Philip, D.S. Hayes, and J. Liebert), 413 (1987).
E.M. Sion

ON THE FREQUENCY OF HELIUM-RICH DEGENERATES IN WIDE BINARIES,
Astrophysical Journal, 326, 249 (1988). E.M. Sion and
T.D. Oswalt.

A CATALOG OF SPECTROSCOPICALLY IDENTIFIED WHITE DWARFS,
Astrophysical Journal Supplement, 65, 603 (1987).
G. P. McCook and E. M. Sion.

THE DETECTION OF PHOTOSPHERIC CALCIUM IN THE DBA WHITE DWARF
G200-39, Astrophysical Journal (Letters) 328, L65 (1987).
S.J. Kenyon, H.L. Shipman, E.M. Sion, and P.A.Aannestad.

HYDROGEN AND CALCIUM IN DB WHITE DWARFS: A CASE FOR INTERSTELLAR
ACCRETION. Astrophysical Journal (Letters) 330, L55 (1988).
E.M. Sion, P.A. Aannestad, and S.J.Kenyon.

CBS31: A NEW ECLIPSING INTERMEDIATE POLAR, Astronomical
Journal (1990). R.M.Wagner,
R.Kaitchuk, E.M.Sion, J.Liebert, and S.G.Starrfield.

THE ORBITAL PERIOD-TEFF RELATION AND COOLING EVOLUTION OF
CATACLYSMIC VARIABLE WHITE DWARFS, Bull. A.A.S. 19,
1042 (1988). E.M.Sion

KINEMATICAL TESTS OF WHITE DWARF FORMATION CHANNELS AND
EVOLUTION, Astronomical Journal, 96, 251 (1988).
E.M. Sion, M. Fritz, J. McMullin, and M. Lallo

IUE OBSERVATIONS OF A HOT DAO WHITE DWARF: IMPLICATIONS FOR
DIFFUSION THEORY AND PHOTOSPHERIC STRATIFICATION, A
Decade of UV Astronomy with the IUE Satellite (ESA
Publications: Noordwijk), ESA SP281, 263 (1988). J.B.
Holberg, E.M. Sion, J. Liebert, and G. Vauclair.

HIGH RESOLUTION IUE OBSERVATIONS OF THE HOT DAO WHITE DWARF
PG1210+533, Bull. Am. Astron. Soc., 19, 1041 (1988).
J.B. Holberg, E.M. Sion, J. Liebert, and G. Vauclair.

DISCOVERY OF A STELLAR WIND IN V471 TAURI: ACCRETION, MAGNETIC
BRAKING AND PRE-CV EVOLUTION, Bull. A.A.S. 20, 706 (1988).
E.M. Sion, D.J. Mullan and F.C. Bruhweiler.

DISCOVERY OF MASS OUTFLOW FROM THE K2V STAR IN V471 TAURI, A
Decade of UV Astronomy with the IUE Satellite (ESA
Publications:Noordwijk), ESA SP281, 423 (1988).
D.J. Mullan, F.C. Bruhweiler, E.M. Sion.

ULTRAVIOLET OBSERVATIONS OF LMC NOVA 1988, A Decade of UV
Astronomy with the IUE Satellite (ESA Publications:
Noordwijk), ESA SP281, 653 (1988). S. Starrfield,
G. Sonneborn, W. M. Sparks, E. M. Sion, R. M. Wagner,
G. Ferland, J. S. Gallagher, R. Wade, R. E. Williams,
S. Heathcote, R. D. Gehrz, E. P. Ney, S. J. Kenyon,
G. Shaviv, R. Wehrse, P. Hausschildt, J. W. Truran,
and C.-C. Wu.

THE DETECTION OF IONIZED HELIUM AND CARBON IN THE PULSATING
DB DEGENERATE GD358, in Lecture Notes in Physics, ed. G.
Wegner (Springer-Verlag:Berlin), p. 354 (1988). E.M. Sion,
J. Liebert, G.A. Wegner and G. Vauclair.

ON THE SEPARATIONS OF WIDE BINARIES CONTAINING WHITE DWARFS,
in Lecture Notes in Physics, ed. G. Wegner (Springer-Verlag:
Berlin), p. 454 (1988). T. D. Oswalt and E.M. Sion.

THE TEMPERATURES OF WHITE DWARFS IN ACCRETING BINARIES,
in Lecture Notes in Physics, ed. G. Wegner (Springer-Verlag:
Berlin), p. 92 (1989). P. Szkody and E.M. Sion.

HIGH RESOLUTION IUE SPECTRA OF THE DA2 STAR IN V471 TAURI,
in Lecture Notes in Physics, ed. G.
Wegner (Springer-Verlag:Berlin), p. (1988).
E.M. Sion, F.C. Bruhweiler and D.J. Mullan.

EVIDENCE FOR A COOL WIND FROM THE K2 DWARF IN THE DETACHED
BINARY V471 TAURI, Astrophysical Journal (Letters),
339, L33 (1989) D. J. Mullan, E. M. Sion, F. C.
Bruhweiler, and K. C. Carpenter.

V471 TAURI, IAU Circular No. 4677, October 24, 1988. E. M.
Sion, F. C. Bruhweiler, K. C. Carpenter, and D. J. Mullan.

V471 TAURI: THE OLDEST AND NEAREST OLD NOVA?, Bull. American
Astronomical Soc. 20, 1021 (1989). E. M. Sion, F. C.
Bruhweiler, K. Carpenter, and D. J. Mullan.

L151-81A/B: A UNIQUE WHITE DWARF BINARY WITH DB AND DA
COMPONENTS, Astrophysical Journal (Letters), 333,
L87 (1988). T. D. Oswalt, P. M. Hintzen, J. W. Liebert, and
E. M. Sion.

DISCOVERY OF A COOL EXPANDING SHELL AT -1200 KM/S AROUND
V471 TAURI, Astrophysical Journal (Letters) 341, L17
(1989). E. M. Sion, F. C. Bruhweiler, D. J. Mullan, and
K. Carpenter.

THE HIGH RESOLUTION SPECTRUM OF THE PULSATING, PRE-WHITE DWARF
STAR PG1159-035 (GW VIR), Astronomical Journal 97, 1440
(1989). J. Liebert, F. Wesemael, D. Husfield, R. Wehrse,
S. G. Starr and E. M. Sion.

EUV RADIATION FROM PRE-CATACLYSMIC, HOT WHITE DWARF-RED DWARF CLOSE
BINARIES: V471 TAURI AND RELATED OBJECTS, in "Extreme
Ultraviolet Astronomy", ed. S. Bowyer (Pergamon: Oxford)(1990).
E. M. Sion, H. L. Shipman, and F. C. Bruhweiler.

DETECTION OF A COOL WIND FROM THE K DWARF IN V471 TAURI,
Bull. A.A.S. 20, 997 (1989). D. J. Mullan, E. M. Sion,
F. Bruhweiler, and K. Carpenter.

CBS128: A NEW MAGNETIC DEGENERATE WITH A 65 MEGAGAUSS SURFACE
FIELD, Astronomical Journal 98, 668. (1989). R. Saffer,
J. Liebert, R. M. Wagner, E. M. Sion, and S. G. Starrfield.

THE HOT DA01 DEGENERATE HZ21: A SEARCH FOR CIRCUMSTELLAR/-
PHOTOSPHERIC METALS AND PECULIAR ABSORPTION AT HE II,
A. J. 99, 668 (1990). M. Fritz, H. Leckenby, E. M. Sion,
G. Vauclair, and J. Liebert.

AN ATLAS OF OPTICAL SPECTRA OF DZ WHITE DWARFS AND RELATED
OBJECTS, Ap.J. Supp. 72, 707 (1990). E. M. Sion, S. J. Kenyon.
and P. A. Aannestad.

ABUNDANCES IN THE HIGHEST TEMPERATURE DZ STAR CBS127: HOW
EFFICIENT IS HYDROGEN SCREENING? Ap.J. 362, 691 (1990).
E. M. Sion, G. L. Hammond, R. M. Wagner, S. G. Starrfield,
and J. Liebert.

THREE VERY COOL DEGENERATE STARS IN LUYTEN COMMON PROPER
MOTION BINARIES: IMPLICATIONS FOR THE AGE OF THE GALACTIC
DISK, Bull. A.A.S., 21, 747 (1989). P. Hintzen, T. D. Oswalt,
J. Liebert, and E. M. Sion.

THE EFFECTIVE TEMPERATURES AND COOLING OF CATACLYSMIC VARIABLE
WHITE DWARFS, Bull. A.A.S., 22, 842 (1990). E. M. Sion,
W. Sparks, S. Kutter, and S. Starrfield.

A PHYSICAL INTERPRETATION OF THE EFFECTIVE TEMPERATURE
DISTRIBUTION FUNCTION OF THE CATACLYSMIC VARIABLES,
Bull. A.A.S. 22, 843 (1990). W. Sparks, E. M. Sion,
S. Kutter, and S. Starrfield.

A SEARCH FOR EVIDENCE OF PAST AND ONGOING MASS LOSS IN THE HOT
D0 DEGENERATES PG1159-035 AND PG1034+001 AND KPD0005+5106,
A.J. 99, 908 (1990). M. L. Fritz, H. Leckenby, and E. M. Sion.

WHITE DWARFS: OBSERVED PROPERTIES, invited article for "The
Reference Enclyclopedia of Astronomy & Astrophysics" (Van
Nostrand: NY), (1990). E. M. Sion.

WHITE DWARF MASS LOSS, ROTATION, INDIVIDUAL MASSES AND THE
IDENTIFICATION OF THE WHITE DWARF REMNANTS OF UPPER MAIN
SEQUENCE STARS S, invited review, NATO ARW: Mass Loss and
Angular Momentum Loss in Hot Stars, (Kluwer: Brussels), 1990.
E. M. Sion.

THE UV SPECTRUM AND GRAVITATIONAL REDSHIFT OF THE COOL METALLIC
LINE WHITE DWARF LDS678A, Bull. A.A.S. 21, 1193 (1990).
T. D. Oswalt, E. M. Sion, J. Liebert, G. Vauclair, G. Wegner.

METAL ABUNDANCE RATIOS IN DZ WHITE DWARFS, Bull. A.A.S. 21,
1193 (1990). P. A. Aannestad, G. L. Hammond, E. M. Sion, S. J.
Kenyon.

THREE VERY COOL DEGENERATE STARS IN LUYTEN COMMON PROPER MOTION
BINARIES: IMPLICATIONS FOR THE AGE OF THE GALACTIC DISK,
Ap. J. 346, 454 (1989). P. Hintzen, T. D. Oswalt, J. Liebert,
and E. M. Sion.

ON THE POST-OUTBURST FAR ULTRAVIOLET DECLINES OF WZ SAGITTAE AND
NOVA CYGNI 1975, in Proc. of IAU Colloquium No. 122: The Physics
of Classical Novae, ed. A. Cassatella (Springer: Berlin), p. 59
(1989). E. M. Sion and P. Szkody.

THE UV SPECTRUM AND GRAVITATIONAL REDSHIFT OF THE COOL METALLIC
LINE WHITE DWARF LDS678A, Bull. A.A.S. 21, 1193 (1990). T. D.
Oswalt, E. M. Sion, J. Liebert, Ge. Vauclair, G. Wegner.

METAL ABUNDANCE RATIOS IN DZ WHITE DWARFS, Bull. A.A.S. 21, 1193
(1990). P. A. Aannestad, G. L. Hammond, E. M. Sion, S. J. Kenyon.

A SEARCH FOR EVIDENCE OF WIND ACCRETION BY THE DA2 WHITE DWARF IN
V471 TAURI, Proc. of the 12th North American Workshop on Cataclysmic
Variables and Low Mass Binaries, ed. C. Mauche (Cambridge Univ. Press)
p. 155 (1990). E. M. Sion, D. J. Mullan, H. L. Shipman.

THE EINSTEIN REDSHIFT AND CARBON ABUNDANCE OF THE DBQA5 WHITE
DWARF LDS678A, Proc. of "Evolution in Astrophysics" (ESTEC:
Noordwijk), p. 467 (1990). E. M. Sion, G. Vauclair, T. D. Oswalt,
G. Hammond, D. Koester, J. Liebert, and G. Wegner.

A STUDY OF THE ULTRAVIOLET EVOLUTION OF U GEMINORUM BETWEEN
OUTBURSTS. Ap.J. 366, 569 (1991). A. Kiplinger, E. M. Sion,
and P. Szkody.

INEFFICIENT ACCRETION BY THE DA2 WHITE DWARF IN V471 TAURI,
Ap.J. 374, 707 (1990). D. J. Mullan, H. L. Shipman, E. M.
Sion, and J. Macdonald.

CONSTRAINTS ON THE C I 2479 PRESSURE SHIFT AND ATMOSPHERIC
ABUNDANCES OF THE DBQA5 WHITE DWARF LDS678A, A.J. 101, 583
(1990). T. D. Oswalt, E. M. Sion, G. Hammond, G. Vauclair,
J. Liebert, G. Wegner, D. Koester, and P. M. Marcum.

THE HOT COMPONENT WIND IN THE SYMBIOTIC STAR BF CYGNI: ACCRETION
DISK AND STEADY NUCLEAR BURNING? Bull. A.A.S. 22, 1294 (1990).
C. Ready, E. M. Sion, S. Starrfield.

TEFF DISTRIBUTION OF WHITE DWARFS IN CATACLYSMIC VARIABLES:
CONSTRAINTS ON CV LIFETIMES AND EVOLUTION ACROSS THE PERIOD
GAP. Bull A.A.S. 22, 1294 (1990). E. M. Sion.

THE DISCOVERY OF STRONG NEUTRAL ATOMIC CARBON ABSORPTION LINES
IN THE SPECTRUM OF THE DAQZ5 WHITE DWARF IN THE ULTRA-SHORT-PERIOD
DWARF NOVA WZ SAGITTAE DURING QUIESCENCE. Ap.J. (lett.) 364, L41
(1990). E. M. Sion, H. Leckenby, and P. Szkody.

THE PHYSICAL PROPERTIES OF DOUBLE DEGENERATE COMMON PROPER MOTION
BINARIES, A.J. 101, 1476 (1991). E. M. Sion, T. D. Oswalt, P. Hintzen,
and J. Liebert.

A DEEP SPECTROSCOPIC SURVEY OF WHITE DWARFS IN COMMON PROPER MOTION
BINARIES. in White Dwarfs, eds. G. Vauclair and E. Sion (Kluwer:
Dordrecht), p. 379 (1991). T. D. Oswalt, E. M. Sion, P. Hintzen and
J. Liebert.

A DEEP SPECTROSCOPIC SURVEY OF COOL WHITE DWARFS IN LUYTEN AND GICLAS
COMMON PROPER MOTION BINARIES, Bull. A. A. S. 22, 1288 (1990).
L. Roberts, T. D. Oswalt, E. M. Sion, P. Hintzen, and J. Liebert.

NEW RESULTS ON WHITE DWARFS IN CATACLYSMIC VARIABLES. in White
Dwarfs, eds. G. Vauclair and E. M. Sion (Kluwer: Dordrecht),
p. 417 (1991). E. M. Sion.

SPECTROSCOPIC CLASSIFICATION OF THE HOTTEST WHITE DWARFS AND THE
REVISED WHITE DWARF SPECTROSCOPIC CLASSIFICATION SYSTEM. in
Transactions of the IAU General Assembly XX, in press. E. M. Sion.

WHITE DWARFS IN CATACLYSMIC VARIABLES: CLUES FROM THE UNDERLYING
WHITE DWARFS. A. J. 102, 295 (1991). E. M. Sion.

DOUBLE DEGENERATE COMMON PROPER MOTION BINARIES. in White Dwarfs,
eds. G. Vauclair and E. M. Sion (Kluwer: Dordrecht), p. 395 (1991).
E. M. Sion, T. D. Oswalt, J. Liebert, and P. Hintzen.

OUTBURSTS BY LOW MASS WHITE DWARFS IN SYMBIOTIC VARIABLES. in
Evolutionary Processes in Interacting Binaries (Proc. of IAU
Symposium 151), ed. J. Sahade, Y. Kondo and R. Polidan (Kluwer:
Dordrecht), in press. E. M. Sion and C. P. Ready.

SPECTROSCOPY OF HIGHLY EVOLVED STARS IN THE CASE LOW DISPERSION
NORTHERN SKY SURVEY. in Objective Prism Surveys, eds. A. G. D.
Philip and A. Upgren (L. Davis Press: Schenectady), in press.
E. M. Sion, R. M. Wagner, S. G. Starrfield, and J. Liebert.

EVOLUTIONARY SEQUENCE OF VERY HOT LOW MASS ACCRETING WHITE DWARFS
WITH SYMBIOTIC VARIATIONS. in B.A.A.S. 23, 1417 (1991).
E. M. Sion.

HOW MUCH HELIUM IS THERE IN A COOL WHITE DWARF? B.A.A.S. 23, 1417
(1991). G. Hammond, E. M. Sion, P. A. Aannestad, S. J. Kenyon.

IR PHOTOMETRY OF COOL WHITE DWARFS IN WIDE BINARIES. B.A.A.S. 23,
1418 (1991). J. A. Smith, T. D. Oswalt, S. K. Leggett, P. M.
Hintzen, E. M. Sion, and J. W. Liebert.

THE EXTREMELY COOL WHITE DWARF LP549-32. B.A.A.S. 23, 1418 (1991).
T. L. Beck, T. D. Oswalt, P. M. Hintzen, E. M. Sion, J. Liebert,
and S. K. Leggett.

WZ SGE: AN ACCRETION TEST CASE, in Proceedings of Workshop on Cataclysmic
Variable Stars (Vina del Mar, Chile: 7/15-7/19/91), in press.
W. Sparks, E. Sion, S. Starrfield, S. Austin.

PUZZLING PULSATIONS EXPLAINED (1992), in Nature 358, p.118. E.M. Sion.

THE INDENTIFICATION OF HIGHLY IONIZED METAL SPECIES IN THE HOT DA1
WHITE DWARF G191-B2B WITH THE HUBBLE SPACE TELESCOPE FAINT OBJECT
SPECTROGRAPH (1992), Ap.J. 391, L29. E. M. Sion, R. C. Bohlin,
R. W. Tweedy, and G. P. Vauclair.

HUBBLE SPACE TELESCOPE FOS OBSERVATIONS OF KPD 0005+5106: A SUBLUMINOUS
WN-WC DESCENDANT WITH ONGOING MASS OUTFLOW? (1992). Ap.J. (Let), 396,
L79. E. M. Sion and R. A. Downes.

OUTBURSTS BY LOW MASS WHITE DWARFS IN SYMBIOTIC VARIABLES (1992).
P.A.S.P. 104, 87. E. M. Sion and C. J. Ready.

ARE THERE ANY HYDROGEN-RICH COOL WHITE DWARF STARS? (1992). in
White Dwarfs: Advances in Theory and Observation, ed. M. Barstow
(Kluwer: Dordrecht), in press. G. Hammond, E. M. Sion, P.
Aannestad, and
S.J. Kenyon.

PHOTOMETRY OF WHITE DWARFS IN WIDE BINARIES (1992). in
White Dwarfs: Advances in Theory and Observation, ed. M. Barstow
(Kluwer: Dordrecht), in press. S. K. Leggett, J. Smith, T.D. Oswalt,
E. M. Sion, J. Liebert, and P.M.N. Hintzen.

SPECTROPHOTOMETRY OF COMMON PROPER MOTION BINARIES CONTAINING WHITE
DWARF COMPONENTS (1992). in White Dwarfs: Advances in Theory and
Observation, ed. M. Barstow (Kluwer: Dordrecht), in press. T. D. Oswalt,
J. A. Smith, S. Shufelt, P. Hintzen, S. K. Leggett, and E. M. Sion.

DZ WHITE DWARFS AND INTERSTELLAR ACCRETION (1993) B.A.A.S. 24, 1128.
P. Aannestad, S. Kenyon, G. Hammond, and E. Sion

METAL ABUNDANCES IN COOL WHITE DWARFS OBSERVED WITH THE MMT SPECTROGRAPH
(1993) B.A.A.S. 24, 1128. G. Hammond, E. Sion, P. Aannestad and S. Kenyon

SPECTROPHOTOMETRIC PROPERTIES OF COMMON PROPER MOTION BINARIES
CONTAINING WHITE DWARF COMPONENTS (1993), B.A.A.S. 24, 1226. T.D.
Oswalt, S. Shufelt, A. Simon, J.A. Smith, S.K. Legget, P. Hintzen,
E.M. Sion and J. Liebert

ON THE 1980-81 DEEP LIGHT MINIMUM OF THE SYMBIOTIC NOVA PU VUL (1993),
B.A.A.S. 24, 1286. E.M. Sion

THE ONSET OF WOLF-RAYET-LIKE WIND OUTFLOW IN THE SYMBIOTIC NOVA PU VUL
B.A.A.S. 24, 1286. M. Scheible, C. Ready, E.M. Sion, S. Shore

PG 0308+096 AND PG 1026+002: TWO NEW SHORT PERIOD BINARY STARS RESULTING
FROM COMMON ENVELOPE EVOLUTION (1993) ASTRON.J. R.A. Saffer, R.A.
Wade, J. liebert, R.F. Green, E.M. Sion, J. Bechtold, D. Foss, and
K. Kidder

HUBBLE SPACE TELESCOPE FOS OBSERVATIONS OF G191-B2B AND KPD0005+5106
(1992). in White Dwarfs: Advances in Theory and Observation, ed.
M. Barstow (Kluwer: Dordrecht), pp.311-317 E. M. Sion.

CATACLYSMIC VARIABLE WHITE DWARFS: A PROGRESS REPORT (1992). in
White Dwarfs: Advances in Theory and Observation, ed. M. Barstow
(Kluwer: Dordrecht),pp. 365-371 E. M. Sion.

HUBBLE SPACE TELESCOPE FOS OBSERVATIONS OF KPD0005+5106 (1992).
in Planetary Nebulae: IAU Sumposium No. 155, eds. A. Acker and H.
Hartl (Kluwer: Dordrecht), p.498. E. M. Sion and R. A. Downes.

HUBBLE SPACE TELESCOPE OBSERVATIONS OF HOT WHITE DWARF STARS (1993)
B.A.A.S. 24, 1128. S. Roby, H. Shipman, M. Barstow, H. Bond, F.
Bruhweiler D. Finley, G. Fontaine, F. Wesemael, J.B. Holberg, R.
Tweedy, S. Kawaler J. Nousek, E. Sion and G. Vauclair

ON THE 1980-81 DEEP LIGHT MINIMUM OF THE SYMBIOTIC NOVA PU VUL (1993),
B.A.A.S. 24, 1286. E.M. Sion

WHITE DWARFS IN CATACLYSMIC VARIABLES: HUBBLE SPACE TELESCOPE FOS AND
HRS SPECTROSCOPY AND THEORETICAL SIMULATIONS (1993) IN "PROCEEDINGS OF
THE SECOND HAIFA TECHNION CONFERENCE ON CATACLYSMIC VARIABLES AND RELATED
PHYSICS" Israel Academy of Sciences, pp.86-96 E.M. Sion

ON A THERMONUCLEAR ORIGIN FOR THE 1980-81 DEEP LIGHT MINIMUM OF THE
SYMBIOTIC NOVA PU VULPECULA (1993), ASTRON.J., 106, 298. E.M. SION

THE ONSET OF WOLF-RAYET OUTFLOW AND THE NATURE OF THE HOT COMPONENT IN
THE SYMBIOTIC NOVA PU VULPECULA (1993),AJ, 106, 2118. E.M. Sion, S.N.
Shore, C.J. Ready and M.P. Scheible

COOL METALLIC LINE WHITE DWARFS, RADIAL VELOCITIES, AND INTERSTELLAR
ACCRETION (1993), AJ, 105, 1033. P.A. Aannestad, S.J. Kenyon, G.L.
Hammond, and E.M. Sion

EVOLUTIONARY SEQUENCES OF VERY HOT LOW MASS ACCRETING WHITE DWARFS WITH
APPLICATION TO SYMBIOTIC VARIABLES AND SUPERSOFT LOW LUMINOSITY X-RAY
SOURCES (1994), ApJ, 421, 261. E.M. Sion and S.G. Starrfield

THE EVOLUTIONARY THERMAL RESPONSE OF A WHITE DWARF TO COMPRESSIONAL
HEATING BY PERIODIC DWARF NOVA ACCRETION EVENTS (1995), ApJ, 438
876. E.M. Sion

THE COOLING OF THE WHITE DWARF IN U GEMINORUM (1994) K. Long, E.M.
Sion, M. Huang, P. Szkody ApJL, 424, L29.

HUBBLE SPACE TELESCOPE GHRS OBSERVATIONS OF U GEMINORUM IN
QUIESCENCE: EVIDENCE FOR A SLOWLY ROTATING WHITE DWARF (1994)
ApJL, 430, L53. E.M. Sion, K.S. Long,
P.Szkody, and M. Huang

HUBBLE SPACE TELESCOPE FOS SPECTROSCOPY OF THE ULTRA-SHORT PERIOD
DWARF NOVA WZ SAGITTAE: THE UNDERLYING DEGENERATE (1995)
ApJ, 439,957. E.M. Sion, F-H.
Cheng, K.S. Long, P. Szkody, R. Gilliland, M. Huang, I. Hubeny

TWO NEW EXTREMELY IRON-RICH HOT DA WHITE DWARFS AND THE NATURE OF
THE EUV OPACITY (1993) ApJ, 416, 806. J.B. Holberg, M.A. Barstow,
D.A.H. Buckley, A. Chen, S. Dreizler, M.C. Marsh, D. O'Donoghue,
E.M. Sion, R.W. Tweedy, G. Vauclair, K. Werner

THE DISCOVERY OF Ni V IN THE PHOTOSPHERE OF THE HOT DA WHITE DWARFS
RE2214-492 AND G191-B2B (1994) ApJL, 425, L105. J.B. Holberg,
I.Hubeny, M.A. Barstow, T. Lanz, E.M. Sion, and R.W. Tweedy

A STUDY OF A HIGH RESOLUTION IUE SPECTRUM OF AM CANUM VENATICORUM
(1994) Astr. Ap.,287, 503 . J-E. Solheim and E.M. Sion

AM CANUM VENATICORUM (1994) in Proceedings of the CCP7 Conference
on Hydrogen Deficient Stellar Systems, St. Andrews, Scotland,
(Daresbury Laboratory: Scotland), No. 21, p. 49. E.M. Sion and J.E.
Solheim

DETECTION OF EPISODIC MASS OUTFLOW IN THE NEWLY DISCOVERED HOT DO
WHITE DWARF RE0503-289 (1994), MNRAS, 271, L52 M.A. Barstow and
E.M. Sion

THE SPECTROSCOPIC CLASSIFICATION OF WHITE DWARFS: UNIQUE
REQUIREMENTS AND CHALLENGES in Proceedings of the
Vatican Symposium: The MK Process
at 50 years: A Powerful Tool for Astrophysical Insight, eds. C.J.
Corbally, R.O. Gray and R.F. Garrison, ASP Conference Series, 60,
64. J. Liebert and E.M. Sion

HUBBLE SPACE TELESCOPE GHRS AND FOS SPECTROSCOPY OF WHITE DWARFS IN
CATACLYSMIC VARIABLES in
Proceedings of the Abano-Terme Conference:
Interrelationships Among Cataclysmics Variables,Cataclysmic
Variables eds. P. Biachinni and M. Orio, (Dordrecht: Kluwer), in
press.

HUBBLE SPACE TELESCOPE FOS SPECTROSCOPY OF THE ULTRA-SHORT PERIOD COMPACT
BINARY WZ SAGITTAE: THE UNDERLYING CARBON-RICH DEGENERATE,
E.M. Sion, F.H. Cheng, K.S. Long, P. Szkody, R. Gilliland, M. Huang
I. Hubeny, in Astronomy Poster Abstracts: XXIInd General Assembly of the
IAU, ed. H. van Woerden (Sliedrecht: Twin Press), p. 96

OBSERVATIONS OF CIRCUMSTELLAR GAS ASSOCIATED WITH HOT WHITE DWARFS
(1994), Bull.Amer.Astron. Soc., 26, 1382. J.B. Holberg, J.
Collins, R.W. Tweedy, F.C. Bruhweiler, E.M. Sion, M.A. Barstow

FAR ULTRAVIOLET AND OPTICAL SPECTROSCOPY OF THE DETACHED DA + dM
CLOSE BINARY RE J1629+780 (1995), PASP, 107, 1. E.M. Sion, J.B.
Holberg, M.A. Barstow, K. Kidder

PROBING FUNDAMENTAL ACCRETION PHYSICS WITH A UNIQUE, FULLY IMPLICIT,
2D HYDRODYNAMIC EVOLUTIONARY CODE (1994)
Proceedings of the Abano-Terme Conference:
Interrelationships Among Cataclysmics Variables,Cataclysmic
Variables eds. P. Biachinni and M. Orio, (Dordrecht: Kluwer), in
press.
M. Huang, E.M. Sion, W.B. Sparks, S.G. Starrfield

AN ULTRAVIOLET SPECTROSCOPIC STUDY OF THE WHITE DWARF IN U
GEMINORUM FOLLOWING TWO DIFFERENT OUTBURSTS (1995), AJ, 109, 1746
M. Huang, E.M. Sion and P. Szkody

A HUBBLE SPACE TELESCOPE STUDY OF THE UNDERLYING WHITE DWARF IN THE
DWARF NOVA VW HYDRI DURING QUIESCENCE (1995), ApJ (Letters),
444, L97 E.M. Sion, P.Szkody, F.H. Cheng, M. Huang

HUBBLE SPACE TELESCOPE HIGH RESOLUTION SPECTROSCOPY OF THE EXPOSED
WHITE DWARF IN THE DWARF NOVA VW HYDRI IN QUIESCENCE: A RAPIDLY
ROTATING WHITE DWARF (1995), ApJ (Letters), 445, L31
E.M. Sion, M. Huang, P. Szkody, F.H. Cheng

AN HST/FOS STUDY OF VW HYDRI DURING SUPEROUTBURST
(1996), ApJ, 458, 355. Huang, E.M. Sion,
I. Hubeny, P. Szkody

IUE SPECTROSCOPY OF THE PECULIAR NOVA-LIKE VARIABLE BZ CAM: CHARACTERISTICS
OF ITS UNUSUAL WIND OUTFLOW (1995), PASP, 107, 856. D. Griffith,
D. Fabian, E.M. Sion

DWARF NOVAE (1995), Invited Chapter in ASTROPHYSICAL QUANTITIES, ed. A.N. Cox,
(New York: AIP Press), in press. E.M. Sion

OBSERVATIONS OF CIRCUMSTELLAR GAS ASSOCIATED WITH HOT WHITE DWARFS
(1995), BAAS, 26, 1382. J.B. Holberg, J. Collins, R.W. Tweedy,
F.C. Bruhweiler, E.M. Sion, M.A. Barstow

EXPOSED WHITE DWARFS IN DWARF NOVAE (1995), invited paper in WHITE
DWARFS, Proceedings of the 9th European Workshop on White Dwarfs,
eds. D.Koester & K. Werner, (Berlin: Springer-Verlag), 208.

PHOTOSPHERIC, CIRCUMSTELLAR, AND INTERSTELLAR FEATURES OF HE, C, N,
O AND SI IN THE HST SPECTRA OF FOUR HOT WHITE DWARF STARS (1995),
AJ, 109, 1220.
H. Shipman, S.W. Roby, M. Barstow, H. Bond, F. Bruhweiler, D.
Finley, G. Fontaine, J. Holberg, J. Nousek, E.M. Sion, R. Tweedy,
F. Wesemael, G. Vauclair.

EXTREME ULTRAVIOLET SPECTROSCOPY AND PHOTOMETRY OF VV PUPPIS DURING
A HIGH ACCRETION STATE (1995), ApJ, 445, 921. S. Vennes, P.Szkody,
E.M. Sion, K. Long

HIGH RESOLUTION UV SPECTROSCOPY OF TWO HOT (PRE-) WHITE DWARFS
WITH THE HUBBLE SPACE TELESCOPE: KPD0005+5106 AND RXJ2117+3412
(1996), A&A, 307, 860. K. Werner, S. Dreizler, U. Heber, Rauch, T.,
T.A. Fleming, E.M. Sion, G. Vauclair

HST OBSERVATIONS OF THE WHITE DWARF IN V471 TAURI (1995) in WHITE
DWARFS, Proceedings of the 9th European Workshop on White Dwarfs,
eds. D.Koester & K. Werner, (Berlin: Springer-Verlag), 268.
H.E. Bond, E.M. Sion, K.G. Schaefer, Rex Saffer, J.R. Stauffer

THE EUVE AND IUE SPECTRA OF THE HOT DA WHITE DWARF GD659 (1995),
ApJ, 453, 313. J.B. Holberg, M.A. Barstow, F. Bruhweiler, E.M. Sion

THE WHITE DWARF DESCENDANTS OF WOLF-RAYET PLANETARY NUCLEI (1995)
in "Wolf-Rayet Planetary Nuclei", eds. E. Jurlander and B. Bjorkmann,
(Kluwer: Dordrecht), in press. E.M. Sion

THE HELIUM-RICH WHITE DWARFS: STATISTICS AND CLASSIFICATION TEN YEARS
POST-MYSORE (1995) in "Hydrogen Stars and Related Objects",
eds. S. Jeffery and U. Heber, (PASP Conf. Series), in press. E.M. Sion

HUBBLE SPACE TELESCOPE STUDIES OF EXPOSED WHITE DWARFS IN DWARF NOVAE
(1995) in Proceedings of the 84th AAVSO Spring Meeting, ed. J. Mattei
JAAVSO, in press. E.M. Sion

HST OBSERVATIONS OF THE WHITE DWARF IN V471 TAURI (1996) BAAS, 27,
1358. K. Schaefer, H.E. Bond, R.A. Saffer, E.M. Sion

A PHOTOSPHERIC ANALYSIS OF THE UNDERLYING WHITE DWARF IN THE HIGH
ACCRETION RATE DWARF NOVA RX ANDROMEDAE (1996) BAAS, 27, 1398.
Q. Nguyen, K.Belle, D. Fabian, M. Huang, E.M. Sion

A COMPARATIVE SYNTHETIC SPECTRAL ANALYSIS OF THE LOW RESOLUTION IUE
SPECTRA OF TWO DWARF NOVAE IN OUTBURST: RX ANDROMEDA AND T LEONIS
(1996), BAAS, 27, 1399. K.Belle, Q. Nguyen, D. Fabian, M. Huang,
E.M. Sion

THE PHOTOSPHERIC PROPERTIES OF THE UNDERLYING HOT WHITE DWARF IN
THE NOVA-LIKE VARIABLE TT ARIETIS DURING ITS 1983 LOW STATE
(1996), BAAS, 27, 1399. D. Fabian, Q. Nguyen, K. Belle, M. Huang,
E.M. Sion

THE COOLING WHITE DWARF IN AL COM (1996), AJ, in press. P. Szkody,
A. Silber, R.A. Downes, E.M. Sion

THE ACCRETION DISK (BELT?) DURING THE QUIESCENCE OF VW HYDRI (1996),
AJ, 111, 2386. M. Huang, E.M. Sion, I. Hubeny, F. Cheng, P. Szkody

THE COOLING WHITE DWARF IN VW HYDRI AFTER NORMAL OUTBURST AND
SUPEROUTBURST: HST EVIDENCE OF A SUSTAINED ACCRETION BELT (1996),
ApJ, 471, L41. E.M. Sion, F. Cheng, M. Huang, I. Hubeny, P. Szkody

ASCA OBSERVATIONS OF U GEM DURING QUIESCENCE (1996), ApJ, 461, 834.
P.Szkody, K.S. Long, E.M. Sion, J. Raymond

CLUES AND MODELLING FOR THE MISSING BOUNDARY LAYER IN CATACLYSMIC
VARIABLES Proceedings of IAU Colloquium No. 163, Accretion Phenomena and
Related Outflows Port Douglas, Australia, eds. D.T Wickramasinghe, G.V.
Bicknell and L. Ferrario (1997), ASP Conf. Series, 121, 727. M. Huang, E.M. Sion, W. Sparks

PRELIMINARY ANALYSIS OF A HUBBLE FOS SPECTRUM OF VW HYDRI IN QUIESCENCE:
A DAQZ WHITE DWARF AND ACCRETION BELT/RING, (1996), in Cataclysmic Variables and
Related Objects, eds. A. Evans and J. Wood, (Dordrecht: Kluwer),
p. 249.
E.M. Sion, M. Huang, P. Szkody, F. Cheng, I. Hubeny

ONGOING MASS EJECTION IN THE PECULIAR HOT DO DEGENERATE
KPD0005+5106 (1996) The Astronomical Journal, 113, 364.
E.M. Sion, J.B. Holberg, M.A. Barstow, M.P. Scheible

HUBBLE SPACE TELESCOPE GHRS SPECTROSCOPY OF U GEMINORUM DURING
TWO OUTBURSTS (1997), ApJ, 483, 907
E.M. Sion, F. Cheng, P. Szkody, J. Provencal, W. Sparks, J. Mattei,
B. Abbott, I. Hubeny, H. Shipman

HST OBSERVATIONS OF AL COM 10-14 MONTHS POST OUTBURST (1997), BAAS, 28, 1335
P.Szkody, E.M. Sion, S.B. Howell. D.W. Hoard, W.M. Sparks

EVIDENCE OF A THERMONUCLEAR RUNAWAY AND PROTON CAPTURE MATERIAL ON A WHITE DWARF IN A DWARF NOVA (1997), ApJL, 480, L17. E.M. Sion, F.H. Cheng, W.M. Sparks,
P. Szkody and I. Hubeny

HST SYNTHETIC SPECTRAL ANALYSIS OF U GEM IN EARLY AND LATE
QUIESCENCE:
A HEATED WHITE DWARF AND ACCRETION BELT? (1997), in White
Dwarfs,
Proceedings of the 10th European Workshop on White Dwarfs, eds.
J. Isern and M. Hernanz (Dordrecht: Kluwer), 359.
F.H. Cheng,
E.M. Sion, K. Horne, I. Hubeny, M. Huang, S.D. Vrtilek.


WHITE DWARF HEATING IN RESPONSE TO RADIAL AND TANGENTIAL HEATING
IN CLOSE BINARY SYSTEMS (1997), Proceedings of the Symposium in
Honor of
the 65th Birthday Anniversary of Professor Icko Iben, Jr. held in Elba, Italy, June 1996, ed. R.T. Rood and A. Renzini (Cambridge: Univ. of Cambridge Press), 213.

HST OBSERVATIONS OF THE DWARF NOVA WZ SGE: A VERY RAPIDLY ROTATING WHITE DWARF (1997), ApJ 484, L149. Cheng, F., Sion, E.M., Szkody, P., and Huang, M.

IUE SPECTROSCOPIC STUDY OF THE DWARF NOVA T LEONIS DURING OUTBURST
UG (1998), PASP, 110, 47
K. Belle, Q. Nguyen, D. Fabian, E.Sion, M. Huang

ROTATIONALLY BROADENED SYNTHETIC SPECTRA FOR HST AND IUE UG
UG OBSERVATIONS OF EXPOSED WHITE DWARFS IN CATACLYSMIC VARIABLES, (1998),
PASP, 110, 39. Quyen Nguyen, Dirk Fabian, Kunegunda Belle, M. Huang,
E.M. Sion

HST SYNTHETIC SPECTRAL ANALYSIS OF U GEM IN EARLY AND LATE QUIESCENCE:
A HEATED WHITE DWARF AND ACCRETION BELT? (1997), AJ,114, 1165. F.H. Cheng,
E.M. Sion, K. Horne, I. Hubeny, M. Huang, S.D. Vrtilek.

A CATALOG OF SPECTROSCOPICALLY IDENTIFIED WHITE DWARFS (1998),
ApJ Suppl., in press. G.P. McCook and E.M. Sion

ANOMALOUS COOLING OF THE MASSIVE WHITE DWARF IN U GEMINORUM
FOLLOWING A NARROW OUTBURST (1998), ApJ, 496, 449.
E.M. Sion, F. Cheng, P. Szkody, W.M. Sparks, B. Gansicke J. Mattei

HUBBLE SPACE TELESCOPE OBSERVATIONS OF AN ACCRETED SILICON SPOT
ON THE MAGNETIC WHITE DWARF IN V471 TAURI (1998), ApJL 496, L29
E.M. Sion, K. Schaefer, H. Bond, R. Saffer, and F.H. Cheng

THE 11TH EUROPEAN WORKSHOP ON WHITE DWARFS (1998), PASP, 110,
238. E.M. Sion

HST Observations of AM Canum Venaticorum (1997), in White Dwarfs,
eds.
J. Isern, M. Hernanz and E. Garcia-Berro, (Dordrecht/Boston/London:
Kluwer), 337. J. Solheim, J. Provencal, E.M. Sion

THERMONUCLEAR RUNAWAYS ON LOW MASS WHITE DWARFS (1997), in
Physical Processes in Symbiotic Binaries and Related Systems,
Proceedings of the International Conference
held in Koninki, Poland, ed. J. Mikolawjewksa (Copernicus
Foundation for Polish Astronomy), 49. E.M. Sion

FAR ULTRAVIOLET RAPID HUBBLE SPACE TELESCOPE PHOTOMETRY OF U GEM IN
OUTBURST AND WZ SGE IN QUIESCENCE (1997), in Astronomical Time
Series, Proceedings of the Florence and George Wise Observatory 25th
Anniversary Symposium, Tel Aviv, Israel, eds. D. Moaz, A. Sternberg, and
E. Leibowitz, (Dordrecht/Boston/London: Kluwer), 191. F.H. Cheng, E.M.
Sion, M. Huang, J. Provencal, P. Szkody.

ACCRETION PHYSICS, ROTATION RATES, AND CHEMICAL ABUNDANCES OF
CATACLYSMIC VARIABLE WHITE DWARFS FROM HST SPECTROSCOPY (1998),
in "The 1997 Pacific Rim Conference on Stellar Astrophysics"
eds. K.L. Chan, K.S. Cheng, and H.P. Singh, ASP Conf. Ser. 138,
317. E.M. Sion

WHITE DWARFS IN CATACLYSMIC VARIABLES, in "Wild Stars in the Old West:
Proceedings of the 13th North American Workshop on Cataclysmic Variables
and Related Objects, eds. S. Howell, E. Kuulkers and C. Woodward, ASP
Conf.Ser. 137, 62. E.M. Sion

UV PULSATIONS IN WZ SGE, in "Wild Stars in the Old West: Proceedings of
the 13th North American Workshop on Cataclysmic Variables and Related
Objects, eds. S. Howell, E. Kuulkers and C. Woodward, ASP Conf.Ser.
137, 62.

WHITE DWARFS AT HIGH DISPERSION: ANALYSIS OF THE FINAL ARCHIVE DATA SET
in ULTRAVIOLET ASTROPHYSICS BEYOND THE IUE FINAL ARCHIVE (1998), eds. W.
Wamsteker and R. Gonzalez Riestra, (ESTEC: Noordwijk), 237. J.B. Holberg,
M.A Barstow, and E.M. Sion.

NEW INSIGHTS ON CATACLYSMIC VARIABLES FROM HST SPECTROSCOPY (1998),
in Proceedings of the 86th Spring Meeting of the AAVSO, Sion,
Switzerland, JAAVSO, in press. E.M. Sion

 1999AAS...19513306S

Silvestri, N. M.; Oswalt, T. D.; Wood, M. A.; Smith, J. A.; Reid, I. N.; Sion, E. M. White Dwarfs in Common Proper Motion Binary Systems: Mass Distribution and Kinematics

________________________________________________________________________________

 1999PASP..111.1292S
Slevinsky, R. J.; Stys, D.; West, S.; Sion, E. M.; Cheng, F. H. A Time-Series IUE Archival Study of the White Dwarf in the Ultrashort-Period Dwarf Nova WZ Sagittae

________________________________________________________________________________

 1999A&A...347..178G
Gänsicke, B. T.; Sion, E. M.; Beuermann, K.; Fabian, D.; Cheng, F. H.; Krautter, J. TT Arietis: the low state revisited

________________________________________________________________________________

 1999yCat.3210....0M

McCook, G. P.; Sion, E. M.
A Catalogue of Spectroscopically Identified White Dwarfs (4th edition,
V.2)

________________________________________________________________________________

 1999PASP..111..702A
Anselowitz, Tara; Wasatonic, Richard; Matthews, Karen; Sion, Edward M.; McCook, George P. The Parentage of Magnetic White Dwarfs: Implications from Their Space Motions

________________________________________________________________________________

 1999PASP..111..532S
Sion, E. M.
White Dwarfs in Cataclysmic Variables

________________________________________________________________________________

 1999AAS...194.7501B

Bambeck, D.; Sion, E. M.
An IUE Archival Study of the Hot White Dwarf in the Symbiotic Star RW Hydrae

________________________________________________________________________________

 1999AAS...194.5204A

Anselowitz, T.; Wasatonic, R.; Sion, E. M.; McCook, G. P.; Aannestad, P. The Spatial Distribution and Kinematics of Cool Metallic Line White Dwarfs

________________________________________________________________________________

 1999AAS...194.5203S
Silvestri, N. M.; Oswalt, T. D.; Wood, M. A.; Smith, J. A.; Reid, N.; Sion, E. M. White Dwarfs in Common Proper Motion Binary Systems: Mass Distribution and Kinematics

________________________________________________________________________________

 1999ApJS..121....1M
McCook, George P.; Sion, Edward M.
A Catalog of Spectroscopically Identified White Dwarfs

________________________________________________________________________________

 1999PhR...311..353S
Sion, E. M.
HST studies of cataclysmic variable white dwarfs.

________________________________________________________________________________

 1999ewwd.conf..531H

Holberg, J. B.; Burleigh, M. R.; Sion, E. M.
The discovery of SI in the white dwarf KW Auriga C

________________________________________________________________________________

 1999ewwd.conf..485H

Holberg, J. B.; Barstow, M. A.; Sion, E. M.
Elemental abundances in hot white dwarfs

________________________________________________________________________________

 1999ewwd.conf..360B

Bond, H. E.; Schaefer, K. G.; Sion, E. M.; Saffer, R. A.; Cheng, F. H. HST observations of the white dwarf in the Hyades binary V471 Tauri

________________________________________________________________________________

 1999ewwd.conf....3S

Sion, E. M.
Workshop summary: The future of white dwarf research?

________________________________________________________________________________

 2000PASP..112.1611U
Urban, J.; Lyons, K.; Mittal, R.; Nadalin, I.; DiTuro, P.; Sion, E. The Surface Temperatures of White Dwarf Accretors in Dwarf Novae: The Active Dwarf Nova CN Orionis during Quiescence

________________________________________________________________________________

 2000AAS...197.8504D

DePasquale, J.; Sion, E. M.
Chemical Abundances of the Magnetic White Dwarf During the Low States of the Polar AM Herculis

________________________________________________________________________________

 2000AAS...197.8503N

Nadalin, I.; Sion, E. M.
The Dwarf Novae Ty Psc and V436 Cen During Quiescence: Exposed White Dwarfs?

________________________________________________________________________________

 2000AAS...197.8502L

Lake, J.; Sion, E. M.
The Dwarf Novae UZ Serpentis and SS Aurigae During Quiescence: Exposed White Dwarfs?

________________________________________________________________________________

 2000AAS...197.0903H
Henry, C. K.; Sion, E. M.
A Comparative Far UV Spectroscopic Study of the Dwarf Novae VW Vul and X Leo During Quiescence

________________________________________________________________________________

 2000HEAD...32.4107S

Szkody, P.; Nishikida, K.; Long, K.; Raymond, J.; Sion, E.; Hoard, D. Chandra Observation of U Gem

________________________________________________________________________________

 2000ApJ...542.1064C
Cheng, F. H.; Horne, Keith; Marsh, T. R.; Hubeny, Ivan; Sion, E. M. Temporal Variations of the White Dwarf and Disk in OY Carinae Following the 1992 Superoutburst

________________________________________________________________________________

 2000MNRAS.314..109B
Barstow, M. A.; Dreizler, S.; Holberg, J. B.; Finley, D. S.; Werner, K.; Hubeny, I.; Sion, E. M. The discovery of photospheric nickel in the hot DO white dwarf REJ 0503-289

________________________________________________________________________________

 2000AAS...196.4506D
DiTuro, P. V.; Mittal, R.; Sion, E. M.
Far Ultraviolet Spectroscopy of the Dwarf Nova CN Orionis During Quiescence

________________________________________________________________________________

 2000AAS...196.4503L

Lyons, K.; Stys, D.; Slevinsky, R.; Sion, E. M.
Archival HST and IUE Study of the Dwarf Novae AH Her and CM Del in Quiescence

________________________________________________________________________________

 2000AAS...196.4502H

Henry, C. K.; Sion, E. M.
The Thermal History of the Magnetic White Dwarf in V471 Tauri

________________________________________________________________________________

 2000PASP..112..354S
Stys, D.; Slevinsky, R.; Sion, E. M.; Saffer, R.; Holberg, J. B.; O'Donoghue, Darragh; Kilkenny, D.; Stobie, R. S.; Koen, C. EC 11481-2303: A Peculiar Hot High-Gravity Pre-White Dwarf

________________________________________________________________________________

 2000JAVSO..29....1S

Sion, E. M.; Cheng, F. H.; Szkody, P.; Gaensicke, B.; La Dous, C.; Hassall, B. The rotation rate and surface temperature of the hot, accreting white dwarf in the dwarf nova RX Andromedae.

________________________________________________________________________________

 2000BaltA...9..247S
Slevinsky, R. J.; Stys, D.; West, S.; Sion, E. M.; Cheng, F. H. An IUE Archival Study of the White Dwarf Temperature Variation in the Dwarf Nova WZ Sagittae

________________________________________________________________________________

2001PASP..113.1156H
Henry, Colleen K.; Sion, Edward M.
Erratum: The Accretion Disk and White Dwarf during the Quiescence of the Dwarf Novae VW Vulpeculae and X Leonis

________________________________________________________________________________

 2001AJ....122.1632L
Lake, Joshua; Sion, Edward M.
The Accretion Disk and White Dwarf in the U Geminorum type Dwarf Novae UZ Serpentis and SS Aurigae during Quiescence

________________________________________________________________________________

 2001PASP..113..970H
1.00008/2001A  E  F                      R          S              U  
Henry, Colleen K.; Sion, Edward M.
The Accretion Disk and White Dwarf during the Quiescence of the Dwarf Novae VW Vulpeculae andχ Leonis

________________________________________________________________________________

 2001ApJ...557..978D
DePasquale, Joseph; Sion, Edward M.
Chemical Abundances of the Accreting Magnetic White Dwarf in the Polar AM Herculis

________________________________________________________________________________

 2001A&A...374..656G
Gänsicke, B. T.; Szkody, P.; Sion, E. M.; Hoard, D. W.; Howell, S.; Cheng, F. H.; Hubeny, I. HST/STIS spectroscopy of the exposed white dwarf in the short-period dwarf nova EK TrA

________________________________________________________________________________

 2001PASP..113..829N
Nadalin, Ira; Sion, Edward M.
The Accretion Disk and White Dwarf in the Short-Period Dwarf Novae TY Piscium and V436 Centauri during Quiescence

________________________________________________________________________________

 2001ApJ...555..834S
Sion, Edward M.; Szkody, Paula; Gaensicke, Boris; Cheng, F. H.; LaDous, C.; Hassall, B. Hubble Space Telescope Spectroscopy of the Dwarf Nova RX Andromedae. I. The Underlying White Dwarf

________________________________________________________________________________

 2001AJ....122..327L
Lyons, Kelly; Stys, D.; Slevinsky, R.; Sion, E.; Wood, Janet H. Archival HST and IUE Study of the Dwarf Novae AH Herculis and CM
Delphini: Exposed White Dwarfs?

________________________________________________________________________________

 2001AAS...198.1208B

Bochanski, J. J.; Sion, E. M.
The Mystery Companion of Mira Uncovered

________________________________________________________________________________

 2001AAS...198.1104S

Sepinsky, J. F.; Sion, E. M.
Hubble Space Telescope Spectroscopic Observations of the Dwarf Nova RX Andromeda During Outburst Rise and Decline*

________________________________________________________________________________

 2001AAS...198.1103P

Pilman, C. S.; Sion, E. M.; Szkody, P.; Gansicke, B.
Hubble Space Telescope STIS Observations of the Dwarf Nova VW Hydri during Superoutburst

________________________________________________________________________________

 2001AJ....121..503S
Silvestri, Nicole M.; Oswalt, Terry D.; Wood, Matt A.; Smith, J. Allyn; Reid, I. Neill; Sion, Edward M. White Dwarfs in Common Proper Motion Binary Systems: Mass Distribution and Kinematics

________________________________________________________________________________

 2001AGM....18S0913B

Bond, H. E.; O'Brien, M. S.; Sion, E. M.
The Paradox of the White Dwarf in V471 Tauri

________________________________________________________________________________

 2001AGM....18S0709B

Bond, H. E.; O'Brien, M. S.; Mullan, D. J.; Sion, E. M.
The Oversized Magnetically Active dK Component of V471 Tauri

________________________________________________________________________________