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ELECTRONIC NEWSLETTER OF THE EUVE OBSERVATORY
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Vol 4, No. 1 6 January 1994 ISSN 1065-3597
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Notes from the Editor
=====================
by Brett A. Stroozas, DASS/Archive Manager
Welcome to the electronic newsletter for the Extreme Ultraviolet Explorer
satellite (EUVE), which is compiled and published monthly at the Center for
EUV Astrophysics (CEA) in Berkeley, CA. Along with the new Volume (4) for
this newsletter, comes a new year for the EUVE mission. A quick review of
1993 is highlighted by a variety of major milestones and accomplishments which
include the following:
o the end of the all-sky survey in January, 1993, and subsequent start of
Guest Observer (GO) observations
o 11 months of successful GO observations, including ~240 pointings at ~90
different celestial targets
o completion of the all-sky survey data processing and analysis, resulting
in the Bright Source List (Malina, 1994) and initial Catalog (Bowyer,
1994) publications
o expansion of the Public Science Archive and release of the initial EUVE
CD-ROM
As EUVE continues to perform extremely well on-orbit, CEA has high hopes and
expectations that 1994 will be as productive, if not more so, than 1993.
The contents of this issue of the EUVE electronic newsletter are as follows:
1. EUVE at the January AAS Meeting
2. Notes from the EUVE Guest Observer (EGO) Program
3. Abstracts of Recently *Accepted* EUVE Papers
4. EUVE Innovation in Science Operations at CEA
5. World Wide Web Server at CEA
6. EUVE Science Archive Notes: New Enhancements in Time for AAS
Please send any comments and/or suggestions related to the EUVE electronic
newsletter to ceanews@cea.berkeley.edu (Internet).
1. EUVE at the January AAS
==========================
The 183rd meeting of the American Astronomical Society (AAS) will be held
from 11-15 January 1994 in Washington, D.C. The following sections highlight
some of the EUVE-related activities at the upcoming AAS.
1.1 EUVE USER'S COMMITTEE MEETING: STRATEGY SESSION ON EUVE AT AAS
-------------------------------------------------------------------
by Dr. Ron Oliversen, EUVE Associate Project Scientist
A strategy session to discuss future EUVE science objectives for the third,
and maybe final, year of the EUVE Guest Observer (EGO) program will be held
at the AAS meeting at the Crystal Gateway Marriott in Washington, D.C. on
*********************************************************************
**** Thursday, January 13 at 1:00-2:15 in the Mt. Vernon Room. ****
*********************************************************************
Any possibility of an extension to the EUVE mission will require a strong
science program with specific objectives to utilize the unique capabilities
of EUVE. The interest and input of the community are extremely important to
formulating the Project's strategy of how to best use EUVE. The importance
of this meeting to the future of EUVE cannot be understated and all members
of the community are strongly encouraged to attend.
1.2 List of Abstracts for EUVE-Related Oral and Poster Presentations
---------------------------------------------------------------------
by Brett A. Stroozas, DASS/Archive Manager
As at the June, 1993, AAS meeting in Berkeley, CA, the January meeting
will be well represented with EUVE-related research. The following is a list
of the EUVE-related abstracts for the meeting, including titles, author lists
and affiliations. This list, which is based on information obtained via Mosaic
from the AAS and may not be fully comprehensive.
ORAL PRESENTATIONS
56.06 UV and Multifrequency Observations of the Quasars 3C 273 and 3C 279,
E. Ramos, M. Kafatos, P.A. Becker (CSI/George Mason University),
F.C. Bruhweiler (Catholic University), B. Geldzahler (CSI/GMU),
R. Hartman (NASA/GSFC), N. Johnson (Naval Research Lab), Y. Kondo
(NASA/GSFC), F. Makino (ISAS, Japan), B. Peterson (Ohio State Univer-
sity), R. Staubert (University of Tubingen, Germany), and J. Wallin
(CSI/GMU)
94.01 Hands-on Demonstration of the Extreme Ultraviolet Explorer Satellite
Orbit, I. Hawkins and R.F. Malina (CEA/UCB)
123.04 Combining EUVE with ROSAT Observations to Locate the X-ray Emission in
the Winds of Early B-Stars, D.H. Cohen, J.J. MacFarlane, R.G. Cooper,
W.T. Sanders, J.P. Cassinelli (U. WI, Madison), J.E. Drew (Oxford U.),
J.V. Vallerga, and B.Y. Welsh (CEA/UCB)
POSTER PRESENTATIONS
4.14 EUV and Soft X-ray Observations of Gamma-Ray Burst Sources, K. Hurley,
P. Li (SSL/UCB), J. Laros (LANL), G. Fishman, and C. Kouveliotou
(NASA/MSFC)
6.08 A Low Cost Approach to EUVE Spacecraft Operations: The Future in As-
trophysical Satellite Operations?, D. Biroscak, P. Ringrose, M. Samuel,
G. Wong, L. Wong, J. Din, F. Kronberg, and D. Meriwether (CEA/UCB)
8.04 A High-Resolution Solar Spectrum in the EUVE Bandpass, Roger J. Thomas
and Joseph M. Davila (NASA/GSFC)
15.01 EUVE Spectroscopic Observation of the 1992 July 15 Flare on AU Mic,
M.J. Abbott (CEA/UCB), S.L. Cully (SSL-CEA/UCB), G.H. Fisher (SSL/UCB)
15.02 A CME Model for the 1992 July 15 AU Mic Flare Observed by EUVE,
S.L. Cully, G.H. Fisher, O.H.W. Siegmund (SSL/UCB)
15.06 Coronal Variability in the Extreme Ultraviolet, J.J. Drake,
M. Mathioudakis (CEA/UCB), J.P. Pye (U. Leicester), A. Fruscione,
S. Bowyer (CEA/UCB), P.W. Vedder (CEA/UCB, NASA), and R.J. Patterer
(CEA/UCB, GSFC)
17.16 Implications of Initial Results from the EUVE Observatory for the FUSE
EUV Spectrometer and a Possible EUVE Extended Mission, R.F. Malina,
D. Finley (CEA/UCB), J. Warren (CEA-SSL/UCB), A. Fruscione,
J. Edelstein (CEA/UCB), B. Haisch (CEA/UCB, Lockheed)
18.04 EUV Emission from 17 Leporis, R.S. Polidan (NASA/GSFC) and S.N. Shore
(IUSB)
37.08 Simultaneous Multiwavelength Observations of Her X-1, S.D. Vrtilek
(CfA, UMD), P. Charles (Oxford), E. Hu (IfA), P. Kahabka (MPE),
C. la Dous (ESA), H. Marshall (MIT), T. Mihara (Riken), F. Primini
(CfA), R. Rutten (RGO), Y. Soong (GSFC), J. Stull (Alfred University),
J. Trumper (MPE), W. Voges (MPE), R. M. Wagner (OSU), and R. Wilson
(MSFC)
50.04 The Luminosity Function of Hot DA White Dwarfs from an EUV-Selected
Sample, J. Dupuis, S. Vennes and S. Bowyer (CEA/UCB)
51.12 EUVE Observations of Planetary Nebulae, A. Fruscione, M. Abbott,
J.J. Drake, J. Dupuis, R.F. Malina, M. Mathioudakis, K. McDonald,
and K.C. Chu (CEA/UCB)
54.06 Discovery of Strong EUV-induced Balmer Emission in the New WD+dM Binary
EUVE J2013+40.0 (RE 2013+400), J.R. Thorstensen (Dartmouth) and
S. Vennes (CEA/UCB)
54.07 Spectroscopic and Orbital Properties of the Binary Feige 24 and Disco-
very of External Plasma at Inferior Conjunction, S.Vennes (CEA/UCB)
and J.R. Thorstensen (Dartmouth)
78.02 The First EUVE Source Catalog, J. Lewis, S. Bowyer, R. Lieu,
M. Lampton, X. Wu, J.J. Drake, and R.F. Malina (CEA/UCB)
78.03 Preliminary Results of the Extreme Ultraviolet Explorer Right Angle
Program, K.E. McDonald, N. Craig, M.M. Sirk, J.J. Drake, and
R. F. Malina (CEA/UCB)
83.10 Possible Detection of a Nearby Supernova Remnant at High Galactic
Latitudes, R.Lieu, C.Hwang, and S.Bowyer (CEA/UCB)
107.02 Extreme Ultraviolet Observations of AGNs and BL Lac Objects,
T.E. Carone, A. Fruscione (CEA/UCB) and H.L. Marshall (MIT)
112.03 A New Synthetic XUV Spectrum, K.P. Dere, H.E. Mason,
B.C. Monsignori Fossi, and K.H. Waljeski (NRL, U. Cambridge, Arcetri,
NRL/NRC)
113.11 Expansion of the EUVE Science Archive: New Products and Services,
E. Polomski, B. Stroozas, J. Drake, K. Chen, and T. Chen,
C. Christian, and R.F. Malina (CEA/UCB)
(LATE) EUV emission from the low activity dwarf HD 4628, M. Mathioudakis,
J.J. Drake (CEA/UCB), J.H.M.M. Schmitt (MPE), K. McDonald, and
S. Bowyer (CEA/UCB)
(LATE) Direct Evidence of an Accretion Stream in the Cataclysmic Variable UZ
Fornacis from EUVE Observations, M.M. Sirk (CEA/UCB), J.K. Warren
(SSL/UCB), J.V. Vallerga, and C.A. Christian (CEA/UCB)
1.3 EUVE CD-ROM V2.1 (A/B/C) to be Distributed
-----------------------------------------------
by Brett A. Stroozas, DASS/Archive Manager
As described in last month's issue of the newsletter, the EUVE Public Sci-
ence Archive group has completed work on a set of CD-ROMs to be distributed
at the AAS meeting. This set -- Volume 2, Number 1, A/B/C -- will include
the full pointed spectrometer GO data sets for 11 observations taken during
the in-orbit checkout and all-sky survey phases of the mission. The observa-
tions have been arranged thematically on the three discs as follows:
o four White Dwarfs on disc A: WD1845+019, Feige 24, G191-B2B, and WD0549+158
o two Late-Type stars on disc B: Capella and Procyon
o five assorted objects on disc C: the White Dwarf WD1620-391, the Cataclys-
mic Variable RE1938-461, the BL Lac object PKS2155-304, the Late-Type
star HR1099, and the Moon
Also included on each disc will be the survey Bright Source List (Malina, 1994)
and initial Catalog (Bowyer, 1994) papers as well as other relevant mission-
related information.
2. Notes from the EUVE Guest Observer (EGO) Program
===================================================
by Anne Miller, EGO Technical Writer
The target of opportunity U Gem was observed on 27 December 1993 for Guest
Observer Dr. Knox Long, from the Space Telescope Science Institute. The com-
plete list of approved GO and calibration targets for Cycle II was released
last month. Look for it in the upcoming EUVE Science Bulletin.
2.1 EUVE Guest Investigator mailing list
----------------------------------------
The EGO Center is offering a new service: the EUVE Guest Investigator
mailing list. This list has been compiled from the e-mail addresses of EUVE GO
Program principal investigators, co-investigators, and those who have expressed
interest in archival data and software available from EUVE. The list will be
used to make announcements of changes which affect the EGO community in gen-
eral, such as new versions of software, newly available data, etc. Members may
also send mail to everyone on the list, to query other investigators or spread
news of new discoveries or resources. The EGI is administered through the
software program "majordomo". Recipients of this newsletter can add themselves
to the EGI mailing list by sending a message to majordomo@cea.berkeley.edu with
the line:
subscribe egi
if you send a message with the line:
help
you will receive a message with further details on the operations available
through the majordomo software package.
2.2 New version of EGODATA Available
------------------------------------
A new version of the reference data for the EUVE spectrometer -- EGODATA
1.8 -- has just been released. The principal change is a new and more accurate
wavelength/imaging angle solution for the spectrometer. The new solutions are
made from polynomial fits, sampled and stored as a 129x129x2 IRAF images. This
latest revision incorporates data from a larger number of calibration sources,
some of which could not be viewed until after pointing restraints were relaxed
this fall.
Version 1.8 of the EUVE GO Program reference data is now available on the
CEA anonymous ftp site in the directory pub/reference/egodata1.8. The ftp site
can also be accessed through the CEA home page in Mosaic (see section 5). The
reference data is used with the IRAF/EUV layered software packages to supply
the most up-to-date information on the spectrometer for data reduction and
simulation tasks.
2.3 Software and User's Guide
-----------------------------
The latest version of the EUVE GO Center Software (EGOCS) User's Guide has
also been installed in the ftp site, in the directory pub/documents. A local
README file describes the contents of the several postscript files, and they
can be browsed in Ghostview from Mosaic. The User's Guide is the correct re-
ference for the current version (1.3) of the EGOC Center IRAF/EUV software.
Please send your comments on the Guide to us! Future revisions of the Guide
will be made with each software release. Watch the EGI mail for an announce-
ment of the next software version later this month. EGOCS 1.4 will include
tasks to simulate interstellar medium (ISM) transmission and transport IRAF
QPOE files in FITS format.
2.4 New CEA HomePage in Mosaic
------------------------------
The CEA Mosaic HomePage (see section 5) has a new facility for browsing
abstracts of papers on EUVE spectrometer data. If you have papers *accepted*
for publication and don't see your abstract there, please send them via e-mail
to:
egoinfo@cea.berkeley.edu
We would especially appreciate hearing about your EUVE GO presentations for
the upcoming AAS.
3. Abstracts of Recently *Accepted* EUVE Papers
===============================================
Included below are abstracts of EUVE-related papers recently *accepted*
for publication in refereed journals. GOs are encouraged to contribute *ac-
cepted* abstracts for inclusion in future editions of this newsletter. Ab-
stracts should be sent to egoinfo@cea.berkeley.edu.
--------------------------------------------------------------
EXTREME ULTRAVIOLET SPECTROSCOPY OF PKS 2155-304
Antonella Fruscione, Stuart Bowyer (CEA/UCB) and Steven M. Kahn (U. Chicago)
to appear in Astrophysical Journal Letters, 1994
We present the extreme ultraviolet (75-110 A) spectrum of the BL Lac object
PKS 2155-304, the first spectrum of an extragalactic source obtained with the
Extreme Ultraviolet Explorer. The spectrum shows a generally smooth continuum,
which can be modeled by a single power-law plus interstellar absorption, and
possibly an absorption feature at ~80 A. The best fit to the data suggests that
the EUV spectrum can be interpreted as a simple extrapolation of the X-ray con-
tinuum, with an energy index a~1.6; however, shallower or steeper power-laws
with indices between -0.4 and 2.7 cannot be ruled out by the existing EUV data
alone. The data provide strong constraints on the interstellar neutral H and
He along the line of sight. Using a column density of 1.36e20 cm^(-2) for the
Galactic neutral hydrogen along the PKS 2155-304 line of sight, the neutral
helium column density is constrained to be 9-10% of the hydrogen amount.
Keywords: BL Lacertae objects -- galaxies: individual: PKS 2155-304 --
ultraviolet: galaxies -- X-rays: galaxies -- ISM: abundances
--------------------------------------------------------------
THE FIRST EUVE SOURCE CATALOG
S. Bowyer, R. Lieu, M. Lampton, J. Lewis, X. Wu, J.J. Drake, and R.F. Malina
(CEA/UCB)
to appear in Astrophysical Journal Supplement, 1994
The Extreme Ultraviolet Explorer (EUVE) has conducted an all-sky survey to
locate and identify point sources of emission in four extreme ultraviolet wave-
length bands centered at approximately 100, 200, 400, and 600 A. A companion
deep survey of a strip along half the ecliptic plane was simultaneously con-
ducted. In this catalog we report the sources found in these surveys using
rigorously defined criteria uniformly applied to the data set. These are the
first surveys to be made in the three longer wavelength bands, and a substan-
tial number of sources were detected in these bands. We present a number of
statistical diagnostics of the surveys, including their source counts, their
sensitivities, and their positional error distributions. We provide a separate
list of those sources reported in the EUVE Bright Source List which did not
meet our criteria for inclusion in our primary list. We also provide improved
count rate and position estimates for a majority of these sources based on the
improved methodology used in this paper. In total, this catalog lists a total
of 410 point sources, for which 372 have plausible optical ultraviolet, or
X-ray identifications, which are also listed.
--------------------------------------------------------------
4. EUVE Innovation in Science Operations at CEA
===============================================
by Dr. Carol Christian, CEA Science and GO Program Manager
and Dr. Roger Malina, CEA Director and EUVE Instrument PI
The EUVE Project at UC Berkeley and Goddard Space Flight Center is actively
discussing possibilities for low cost alternatives to mission operations in
astrophysics missions. The relevance of this topic is in the larger context
of the critical funding situation at NASA which threatens most of the existing
missions today.
In addition to considering the unique science that can be conducted with
EUVE by studying scenarios beyond the conventional pointing programs conducted
in today's operations, other topics include applying innovative techniques to
satellite scheduling, data acquisition and data delivery. This discussion
should be viewed as a basis to define the course of EUVE scientifically and as
a technology test-bed through the end of the century, if a mission extension
can be secured. These innovative technology efforts are specifically aimed to
significantly reduce the cost of operating NASA missions.
One part of the study involving NASA centers, CEA/UCB and industry is the
identification of low-cost, innovative operations concepts that would improve
the manpower-to-science return ratio. The institutions involved in this study
are CEA/UCB, NASA Ames Research Center, Jet Propulsion Laboratories (JPL),
Goddard Space Flight Center (GSFC), Lockheed, Heuristicrats Research Incorpor-
ated, Talarian Inc., and SeaSpace Inc. All these institutions have contributed
information, technology and development toward the use of EUVE as a test-bed
for Augmented Intelligence (AI) research applications and other innovative
low-cost approaches to NASA mission operations.
Specific topics being investigated are science schedule optimization and
automation, remote target request and data delivery services, and ground system
and network testing. The work is covered in an AI Development Proposal granted
for FY 94 with NASA Ames. Other areas of research of interest to JPL include
telemetry monitoring and smart payload health and safety monitoring with expert
and diagnostic system support. Additional efforts are aimed at expert anomaly
identification and resolution, command optimization and automated command se-
quence validation.
If these areas can be significantly improved using new, innovative and
modern technologies, all NASA missions will benefit by improvements in the
efficiency of science and reduction in costs.
5. World Wide Web Server at CEA
===============================
by Bill Boyd, CEA Mosaic Administrator
CEA first implemented the World Wide Web (WWW) Mosaic server in September,
1993. It provides ftp access and a gopher server and a WAIS index will soon
be available. Information may be accessed regarding the EUVE Guest Observer
Center, the EUVE Public Science Archive and other areas of the project. CEA
plans to add more services in the future.
The NCSA Mosaic server at CEA can be accessed by opening the Uniform Re-
source Locator (URL):
http://ftp.cea.berkeley.edu/HomePage.html
or, from Lynx (text-based version of Mosaic) via:
telnet ftp.cea.berkeley.edu 200
6. EUVE Science Archive Notes: New Enhancements in Time for AAS
================================================================
by Brett A. Stroozas, DASS/Archive Manager
There have been a number of enhancements made to the EUVE Public Science
Archive in the last few months. As mentioned above, Volume 2, Number 1 of the
EUVE CD-ROM series will be distributed at the upcoming AAS meeting in Washing-
ton, D.C. The highlights of this set of three CDs are the eleven pointed
GO calibration targets contained therein: four White Dwarfs on disc A, two
Late-Type stars on B and five assorted targets on C. All EUVE CDs may be
ordered via electronic mailserver or postal mail (see Archive access informa-
tion below).
The Archive has also updated and added to the holdings in the CEA node of
NASA's Astrophysics Data System (ADS). In addition to updating the existing
EUVE calibration targets list, a new database has been added -- euve_bsl --
which contains information on 356 sources from the EUVE all-sky survey Bright
Source List (Malina, 1994). Work on implementing the initial EUVE survey
Catalog (Bowyer, 1994) database is in progress.
In the area of user services, CEA has completed the development work on an
"ISM Tool" which calculates ISM attenuation of EUV flux, based on parameters
input by the user (this software may also be accessed via the mailserver or by
porting the C source code from the FTP site). CEA is beginning work on a
spectral data archive service which will allow users to remotely display and
retrieve EUV 1-d spectra.
The FTP site (ftp.cea.berkeley.edu) has been cleaned up and reorganized.
In addition to updating existing data, there are many new additions: the all-
sky survey Bright Source List (Malina, 1994) and initial Catalog (Bowyer, 1994)
results, images from the survey, spectra in FITS format, abstracts of EUVE pa-
pers, and assorted papers from the special EUVE edition of the Journal of the
British Interplanetary Society. Additional EUVE FITS spectra will be added to
the site as GO data rights begin to expire in April, 1994.
As a final note, I would like to remind potential Archive users of the vari-
ous methods to access the available EUVE material (machine responses are in
brackets; explanations are in parentheses):
1. Anonymous FTP:
ftp ftp.cea.berkeley.edu
[Name:] anonymous
[Password:] TYPE_YOUR_FULL_E-MAIL_ADDRESS
? (for help)
bye (to exit)
2. E-Mailserver:
mail archive@cea.berkeley.edu
[Subject:] you_don't_need_to_type_anything_here
help (to retrieve "help" file)
^D (ctrl-D to send)
3. NASA's ADS: One needs an ADS account to access the CEA ADS node. Contact
ADS User Support (ads@cuads.colorado.edu) for more information.
4. CD-ROM Series: Volumes 1 and 2 of the CD-ROM series (four separate CDs)
are available via mailserver and postal mail requests.
5. CEA WWW Server:
http://ftp.cea.berkeley.edu (for Mosaic)
telnet ftp.cea.berkeley.edu (for lynx)
6. Postal Mail:
The EUVE Public Science Archive
Center for EUV Astrophysics
2150 Kittredge St.
Berkeley, CA 94720
510-642-3032 (voice) or 510-643-5660 (fax)
archive@cea.berkeley.edu
REFERENCES
==========
o Bowyer, C.S., et al., The First EUVE Source Catalog, Astrophysical Journal
Supplement, 1994 (in press)
o Malina, R.F., et al., The Extreme Ultraviolet Explorer Bright Source List,
Astronomical Journal, Feb. 1994 (in press)
-----------------------------------------------------------------------
The EUVE Electronic Newsletter is issued by the Center for Extreme
Ultraviolet Astrophysics, University of California, Berkeley, CA 94720,
USA. The opinions expressed are those of the authors. Publishers:
Drs. R.F. Malina and C.S. Bowyer. Editor: B.A. Stroozas. Funded by
NASA contracts NAS5-30180 and NAS5-29298. Send newsletter correspondence
to: ceanews@cea.berkeley.edu. The EUVE Public Science Archive is accessible
via FTP: ftp.cea.berkeley.edu, /pub/archive. The EUVE project is
managed by NASA's GSFC. The GSFC Project Manager: Paul Pashby, Project
Scientist: Dr. Yoji Kondo, Deputy Project Scientist: Dr. Ronald Oliversen.
NASA HQ Program Scientist: Dr. Robert Stachnik, Dep. Program Scientist:
Dr. D. Buzasi, Program Manager: Dr. G. Riegler. GSFC Project Operations
Director: Mr. Kevin Hartnett. Information on the EUVE Guest Observer
Program is available from: Dr. Y. Kondo, Mail Code 684, GSFC, Greenbelt,
MD 20771 (301)286-6247; e-mail to euve@stars.span.nasa.gov.
END-----------EUVE------------ELECTRONIC---------------NEWS-----------------END
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