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Vol 6, No. 7                 29 Jul 1996                    ISSN 1065-3597
	  (C) 1996, Regents of the University of California

Notes from the Editor
   by Brett A. Stroozas, EUVE Science Operations Manager

   Welcome to the electronic newsletter for NASA's Extreme Ultraviolet
Explorer (EUVE) satellite, compiled and published monthly by the
Center for EUV Astrophysics (CEA) at the University of California,
Berkeley (UCB).  The contents of this issue of the EUVE electronic
newsletter are as follows:

 1. EUVE Science News
    1.1 Recent EUVE Science Highlights
    1.2 Abstracts of Recently *Accepted* EUVE Papers
 2. EUVE Science Operations News
    2.1 Public GO/RAP Data Release for 1 Aug 1996
    2.2 On-Line Access to EUVE
 3. CEA Job Listings

To comment on or make suggestions for the EUVE electronic newsletter,
please send e-mail to (Internet).

   The EUVE observatory performed well throughout the month of May
1996, conducting observations of the following Guest Observer (GO) and
Right-Angle Program (RAP) targets (name and spectral type information
taken from the SIMBAD or internal CEA databases; "NOIDs" are
unidentified objects):

   Target            EUVE         Spectral      Observation
    Name             Name           Type        GMT Date(s)      Notes

  HU Aqr           EUVE J2108-05.3  CV:AM   29 May - 03 Jun 1996  EGO,COO
  1455-3330        --------         NeutSt  29 May - 03 Jun 1996  RAP
  LB 9802          EUVE J0317-85.5  Star    03 Jun - 05 Jun 1996  EGO
  ALEXIS Transient --------         NOID    03 Jun - 05 Jun 1996  RAP
  HZ 43            EUVE J1316+29.0  WD:DA   05 Jun - 07 Jun 1996  EGO
  EUVE J1706-450   EUVE J1706-450   NOID    05 Jun - 07 Jun 1996  RAP
  LHS 2924         --------         M+...   07 Jun - 11 Jun 1996  EGO
  EUVE J1854-324   EUVE J1854-324   NOID    07 Jun - 11 Jun 1996  RAP
  Coma Cluster     --------         GalClus 11 Jun - 12 Jun 1996  EGO
  EUVE J1706-450   EUVE J1706-450   NOID    11 Jun - 12 Jun 1996  RAP
  AU Mic           EUVE J2045-31.3  M0Ve    12 Jun - 15 Jun 1996  EGO,COO
  WGA J1559+27     --------         AGN     12 Jun - 15 Jun 1996  RAP
  RE J1925-563     EUVE J1925-565   NOID    15 Jun - 19 Jun 1996  EGO
  V815 Her         EUVE J1808+29.6  G5      15 Jun - 19 Jun 1996  RAP
  Jupiter          --------         SolSys  19 Jun - 24 Jun 1996  EGO,COO
  Survey           --------         Test    24 Jun - 25 Jun 1996  CAL
  RE J1925-563     EUVE J1925-565   NOID    25 Jun - 26 Jun 1996  EGO
  V815 Her         EUVE J1808+29.6  G5      25 Jun - 26 Jun 1996  RAP
  NGC 5548         EUVE J1417+25.1  AGN:Sy1 26 Jun - 07 Jul 1996  EGO,COO

  Key to Notes:
	EGO = Guest Observer observation
	RAP = Right Angle Program observation
	CAL = star tracker calibration test
	COO = coordinated observation

1. EUVE Science News

1.1 Recent EUVE Science Highlights
	by Dr. Pierre Chayer, EUVE/CEA Scientist


      Drs. Jules Halpern (Columbia Astrophysics Laboratory) and Herman
   Marshall (Center for Space Research, MIT) performed a long
   observation of the Seyfert Galaxy RX J0437.4-4711 with EUVE,
   monitoring the soft X-ray Seyfert galaxy for 20 days. The Seyfert
   Galaxy was detected in the 70-110 A range, both in the
   short-wavelength spectrometer and in the Deep Survey imager.



      Drs. Frits Paerels (Space Science Laboratory, University of
   California at Berkeley), Min Young Hur (Department of Physics,
   University of California at Berkeley), Christopher Mauche (Lawrence
   Livermore Laboratory), and John Heise (SRON Laboratory for Space
   Research, Utrecht, Netherlands) obtained and analyzed the EUVE
   spectrum of the white dwarf in AM Herculis in the 75-120 A band.
   They detected ionization edges and absorption lines from highly
   ionized neon (Ne VI, Ne VIII), but they did not detect absorption
   at the O VI 2s, 2p edges, which are expected to be the strongest
   spectral features in this band in an atmosphere of solar
   composition at the density and temperature expected for the
   accretion region in this object.



      Drs. J. Schmitt (Max-Planck-Institut fur Extraterrestrische
   Physik, Federal Republic of Germany) R. Stern (Solar and
   Astrophysics Laboratory, Lockheed Palo Alto Research Laboratory),
   J. Drake (SAO), and M. Kurster (Max-Planck-Institut fur
   Extraterrestrische Physik, Federal Republic of Germany) obtained,
   with the short-wavelength spectrometer on board EUVE, a spectrum of
   the RS CVn binary CF Tuc. The RS CVn CF Tuc consists of a G0V dwarf
   star and an K4IV evolved star in a synchronous orbit of 2.9 days.
   They detected only two spectral lines attributed to Fe XXII and Fe
   XXIII in addition to the continuum. Using the EUVE data and ROSAT
   PSPC spectra, Dr. Schmitt's group demonstrated that the iron
   abundance in the corona of CF Tuc is reduced with respect to solar
   values by factors between 5 and 10. They proposed to designate this
   phenomenon as the "metal abundance deficiency syndrome" (MADS).

1.2 Abstracts of Recently *Accepted* EUVE Papers

   Included below are abstracts of EUVE-related papers recently
*accepted* for publication.  For those papers authored by CEA
personnel, the CEA publication numbers are indicated.  Unless
otherwise noted, researchers may obtain preprints of the CEA papers by
sending an e-mail request containing the publication number(s) of
interest to

   Researchers are encouraged to contribute *accepted* EUVE-related
abstracts for inclusion in future editions of this newsletter;
abstracts or preprints will also be posted under the CEA WWW site.
Please send all abstracts or preprints to


B. Stroozas, D. Biroscak, M.E. Eckert, F. Girouard, A. Hopkins,
  G.C. Kaplan, F. Kronberg, K.E. McDonald P. Ringrose, C. Smith,
  J.V. Vallerga, L. Wong, and R.F. Malina
To appear in 1996 International Telemetering Conference Proceedings.
  [CEA publication #743]

   The science payload for NASA's Extreme Ultraviolet Explorer (EUVE)
satellite is controlled from the EUVE Science Operations Center (ESOC)
at the Center for EUV Astrophysics (CEA), University of California,
Berkeley (UCB). The ESOC is in the process of a transition from a
single staffed shift to an autonomous, zero-shift, "lights out"
science payload operations scenario (a.k.a., 1:0). The purpose of the
1:0 transition is to automate all of the remaining routine, daily,
controller telemetry monitoring and associated "shift" work.  Building
on the ESOC's recent success moving from three-shift to one-shift
operations (completed in Feb 1995), the 1:0 transition will further
reduce payload operations costs and will be a "proof of concept" for
future missions; it is also in line with NASA's goals of "cheaper,
faster, better" operations and with its desire to out-source missions
like EUVE to academe and industry. This paper describes the 1:0
transition for the EUVE science payload: the purpose, goals, and
benefits; the relevant science payload instrument health and safety
considerations; the requirements for, and implementation of, the
multi-phased approach; a cost/benefit analysis; and the various
lessons learned along the way.


M. Eckert, C. Smith, F. Kronberg, F. Girouard, A. Hopkins, L. Wong,
  P. Ringrose, B. Stroozas, and R.F. Malina
To appear in 1996 International Telemetering Conference Proceedings.
  [CEA publication #744]

   A strategy for addressing the complexity of problem identification
and notification by autonomous telemetry monitoring software is
discussed.  The Extreme Ultraviolet Explorer (EUVE) satellite's
science operations center (ESOC) is completing a transition to
autonomous operations.  Originally staffed by two people, twenty-four
hours every day, the ESOC is nearing the end of a phased transition to
unstaffed monitoring of the science payload health. To develop
criteria for the implementation of autonomous operations we first
identified and analyzed potential risk areas. These risk areas were
then considered in light of a fully staffed operations model, and in
several reduced staffing models. By understanding the accepted risk in
the nominal, fully staffed model, we could define what criteria to use
in comparing the effectiveness of reduced staff models. The state of
the scientific instrument package for EUVE is evaluated by a
rule-based telemetry processing software package. In the fully
automated implementation, anomalous states are characterized in three
tiers: critical to immediate instrument health and safety,
non-critical to immediate instrument health and safety, and affecting
science data only. Each state requires specific action on the part of
the engineering staff, and the response time is determined by the
tier. The strategy for implementing this prioritized, autonomous
instrument monitoring and paging system is presented. We have
experienced a variety of problems in our implementation of this
strategy, many of which we have overcome. Problems addressed include:
dealing with data dropouts, determining if instrument knowledge is
current, reducing the number of times personnel are paged for a single
problem, prohibiting redundant notification of known problems,
delaying notification of problems for instrument states that do not
jeopardize the immediate health of the instrument, assuring a response
to problems in a timely manner by engineering staff, and communicating
problems and response status among responsible personnel.


F. Kronberg, A. Weiner, T. Morgan, B. Stroozas, F. Girouard,
  A. Hopkins, L. Wong, M. James, J. Kneubuhl, and R.F Malina
To appear in 1996 International Telemetering Conference Proceedings.
  [CEA publication #745]

   We report on the initial design and development of a prototype
computer-mediated response system, the Fault Induced Document Officer
(FIDO), at the UC Berkeley Center for EUV Astrophysics (CEA) Extreme
Ultraviolet Explorer project (EUVE). Typical 24x7 staffed spacecraft
operations use highly skilled expert teams to monitor current ground
systems and spacecraft state for responding to anomalous ground system
and spacecraft conditions. Response to ground system error messages
and spacecraft anomalies is based on knowledge of nominal component
behavior and the evaluation of relevant telemetry by the team. This
type of human-mediated operation is being replaced by an intelligent
software system to reduce costs and to increase performance and
reliability. FIDO is a prototype software application that will
provide automated retrieval and display of documentation for
operations staff.  Initially, FIDO will be applied for ground systems.
Later implementations of FIDO will target spacecraft systems. FIDO is
intended to provide system state summary, links to relevant
documentation, and suggestions for operator responses to error
messages. FIDO will provide the operator with near realtime expert
assistance and access to necessary information. This configuration
should allow the resolution of many anomalies with out the need for
on-site intervention by a skilled controller or expert.


L. Wong, M. Lewis, N. Sabbaghi, F. Kronberg, D. Meriwether, K. Chu,
  E. Olson, T. Morgan, and R.F. Malina
To appear in 1996 International Telemetering Conference Proceedings.
  [CEA publication #746]

   This paper discusses the design and development of the EUVE Virtual
Environment (EVE) system. The EVE system is being developed as an
interactive virtual reality (VR) viewing tool for NASA's Extreme
Ultraviolet Explorer (EUVE) satellite. EVE will serve as a predictive
tool for forecasting spacecraft constraint violations and will provide
a capability for spacecraft problem analysis and resolution in
realtime through visualization of the problem components in the
spacecraft.  EVE will animate, in three-dimensional realtime, the
spacecraft dynamics and thermal characteristics of the EUVE
spacecraft. EVE will also display the field of view for the science
instrument detectors, star trackers, sun sensors, and both the omni
and high-gain antennas for NASA's Tracking and Data Relay Satellite
System (TDRSS) and for possible ground station contact. EVE will
display other vital spacecraft information to support the routine
operations of the EUVE spacecraft.  The EVE system will provide three
quick-look visualization functions: (1) to model in-orbit data for
realtime spacecraft problem analysis and resolution, (2) to playback
data for post-pass data analysis, and training exercises, and (3) to
simulate data in the science planning process for optimum attitude
determination and to predict spacecraft and thermal constraint
violations.  We present our preliminary design for a telemetry server,
providing both realtime and post pass data, that uses standard Unix
utilities. We also present possibilities for future integration of the
EVE system with other software to automate the science planning and
command generation functions of the satellite operations.


N. Sabbaghi
To appear in 1996 International Telemetering Conference Proceedings.
  [CEA publication #747]

   Virtual reality (VR) provides science operators with a time-saving
tool for interpreting telemetry data.  Therefore, the Extreme
Ultraviolet Explorer (EUVE) satellite operations team decided to
develop an inexpensive VR system to best address human operators'
needs. The EVE (EUVE Virtual Environment) Project developed a solution
to the issue of attaining maximum quality representation for minimal
cost via a series of weighted trade-offs that maximize return with
minimal development costs.  Quantification of realism, methods of
graphic representation, and hardware and software limitations are


K. Hurley, P. Li, F. Vrba, C. Luginbuhl, D. Hartmann, C. Kouveliotou,
  C. Meegan, G. Fishman, S. Kulkarni, D. Frail, S. Bowyer, and
  M. Lampton
Astrophysical Journal Letters, 463, L13, 1996.  [CEA publication #748;
  not preprinted]

   The location of the soft gamma repeater SGR 1900+14 was recently
reduced to two ~5 arcmin**2 alternate error boxes by the network
synthesis method.  We have used the ROSAT high Resolution Imager to
observe the error box that is closest to the supernova remnant
G42.8+0.6.  A quiescent, steady, point X-ray source was found at
RA(2000) = 19h 07m 14.15s, DEC(2000) = 9d 19' 19.06", whose unabsorbed
flux is 3E-12 ergs cm^(-2) sec^(-1).  Its position is also consistent
with a peculiar double infrared source described in a companion paper.
We have also examined this region using the VLA, and have obtained
upper limits to the extreme ultraviolet flux of this object using the
Extreme Ultraviolet Explorer.


THE EUVE BIBLIOGRAPHY, AS OF JULY 1996 [CEA publication #750]

[NOTE:  This publication is a bibliography of EUVE-related papers.]


C.-Y. Hwang and S. Bowyer
To appear in Astrophysical Journal.  [CEA publication #754]

   We present EUV light curves and spectra of three Seyfert galaxies.
The data were obtained from EUVE observations of the galaxies MRK 279,
MRK 478 and TON S180.  The variability in the light curves provides an
upper limit to the size of the EUV emitting region which excludes the
BLR and diffuse intercloud regions as the source of this emission.
The EUV spectra are all characterized by discrete line features; in
the case of MRK 478 we find the lines vary on time scales of less than
a day.  These results allow us to rule out various models proposed for
Seyfert galaxies.  Comparing these spectra in their rest frames, we
find that several of these features appear at the same wavelengths.  A
composite EUV spectrum is produced from these redshift-corrected
spectra.  The most striking feature in the composite spectrum is an
emission feature at ~79 A, which is also observed in the spectra of
each of the individual galaxies.  It is difficult to explain this
feature by emission from a photoionized or collision-driven plasma in
thermal equilibrium.  We suggest this line feature may be the
fluorescent transition of neutral Fe related to the 6.4 keV K-alpha
emission that has frequently been observed in the X-ray spectra of
Seyfert galaxies.  If this interpretation is correct, this result
imposes strong constraints on the distribution of warm material in
these galaxies.


2. EUVE Science Operations News

2.1 Public GO/RAP Data Release for 1 Aug 1996
        by Dr. Nahide Craig, EUVE User Support Scientist

   The table below lists the GO/RAP observations that become public on
1 Aug 1996.  For each observation is given the target name, the
approximate exposure time in ksec, the GMT start/end dates, the
target's spectral type, and the data identification code (GO and RAP
data are marked accordingly).  All public data sets can be ordered
from the archive via WWW and electronic or postal mail (see addresses
below).  Please be sure to include in your order the DataID(s) of
interest.  Processed data sets are shipped on 8mm tape or (if
requested) on CD-ROM via postal mail.

   The data rights policies for observations state that PIs have
proprietary rights to the data for a given period of time from the
date (s)he receives it.  It is often the case that long observations
are broken up over many months; e.g., an observation approved for 60
ksec may actually be observed for 10 ksec one month, 20 ksec the next
and 30 ksec three months later.  In such cases the proprietary period
begins after the PI is sent the final piece of the completed

   Target        ~Exp      Observation Dates      SpT      DataID
    Name        (ksec)    Start           End

  GO Data Sets Available 1 Aug 1996:

  EUVE J1201-365    1    30 Jun - 30 Jun 1995     NOID     go0353 
  EUVE J1533+337    2    30 Jun - 30 Jun 1995     NOID     go0354 
  EUVE J1706-763    8    30 Jun - 01 Jul 1995     NOID     go0355 
  EUVE J1708-111    1    30 Jun - 30 Jun 1995     NOID     go0356 
  EUVE J1856-216    1    05 Jul - 05 Jul 1995     NOID     go0357 
  EUVE J2114+503    2    05 Jul - 05 Jul 1995     NOID     go0358 
  EUVE J2115-586    2    05 Jul - 05 Jul 1995     NOID     go0359 
  EUVE J2301-392    1    05 Jul - 05 Jul 1995     NOID     go0360 
  EUVE J2311+006   41    23 Jun - 24 Jun 1995     NOID     go0361 
  EUVE J1325-115   42    21 Jun - 22 Jun 1995     NOID     go0362 
  Her X-1         100    24 Jun - 28 Jun 1995     Pulsar   go0363 
  Her X-1          13    28 Jun - 28 Jun 1995     Pulsar   go0364 
  HR 120           74    05 Jul - 08 Jul 1995     F2V      go0365 
  Jupiter          74    04 Jun - 06 Jun 1995     SolSys   go0366 
  Moon              3    16 Jun - 16 Jun 1995     SolSys   go0367 
  Moon              1    15 Jul - 15 Jul 1995     SolSys   go0368
  Mrk 478          91    02 Jul - 05 Jul 1995     AGN:Sy1  go0369 
  ALEXIS Transient 26    19 Mar - 20 Mar 1995     NOID     go0370 
  ALEXIS Transient 28    06 May - 07 May 1995     NOID     go0371 
  PG 1444+407      12    01 Jul - 01 Jul 1995     Star     go0372 
  GR Burster        8    01 Jul - 01 Jul 1995     GRB      go0373 

  RAP Data Sets Available 1 Aug 1996:



2.2 On-Line Access to EUVE

   Listed below are the various methods for on-line access to EUVE:

 o CEA World Wide Web (WWW)

   telnet 200 (for those without a WWW browser)

 o anonymous FTP

	Name:  anonymous
	Password:  type_your_full_e-mail_address

 o anonymous gopher


 o EUVE Electronic Newsletters

     Past issues -- available via the CEA WWW site
     Subscriptions -- mail ("subscribe
     Post message (moderated) to all subscribers:

 o GI Program

     Are you interested in finding out about or using EUVE data?  Do
     you need help in understanding EUVE data sets?  Do you need help
     in using the available EUVE data analysis software tools?  If you
     answer "yes" to any of the above, the Guest Investigator (GI)
     Program at CEA can help YOU!  For more information see the CEA
     WWW site or contact the Archive (

 o Public RAP

     The Public Right Angle Program (RAP) is a simple and easy method
     for researchers to propose for long-exposure EUVE imaging data.
     For more information on the Public RAP and the simple proposal
     process see the CEA WWW site or contact the EGO Center
     (  Mail all proposals to

 o Contact information for the EUVE Science Archive or EGO Center:

		     Center for EUV Astrophysics
			  2150 Kittredge St.
		       Berkeley, CA  94720-5030
			 510-642-3032 (voice)
			  510-643-5660 (fax)

3.0 CEA Job Listings
	by Cathie Jones, CEA Personnel Manager


   Multiple opportunities exist on NASA's Extreme Ultraviolet Explorer
(EUVE) satellite project.  Current experience on Multi-Mission
Satellite operations is desired for all positions.  Candidates will be
temporarily located at GSFC, Greenbelt, MD, until the new Explorer
Platform Operations Center is complete at the Center for EUV
Astrophysics, University of California, Berkeley.  To apply, send
resume and three references to UC Personnel Office, 2200 University
Ave, Berkeley, CA 94720-3540.  Cite the box number given for the
position in which you are interested.


	    Platform Operations Manager ($47.7K - $59.7K)

   Coordinate all satellite operations personnel in the performance of
operations tasks.  Extensive experience in aerospace field, including
significant managerial experience.  Demonstrated capabilities in
spacecraft systems engineering; spacecraft mission planning and
scheduling; spacecraft-to-ground interfaces, including TDRSS and DSN;
spacecraft monitoring, command, and control; spacecraft attitude
control systems, power systems, thermal systems, on-board
communications systems, and on-board data handling systems.


		Subsystem Engineers ($43.4K - $54.3K)

   Experience in spacecraft operations with proficiency in two or more
of the following: spacecraft communications and data handling systems;
spacecraft power systems; attitude control systems; spacecraft thermal
systems and analysis; spacecraft mission planning and console
operations; spacecraft tracking, orbit determination, and analysis.


	       Ground System Engineer ($43.4K - $54.3K)

   Significant experience in spacecraft ground systems design,
development, maintenance, or operations, and experience in spacecraft
command, telemetry, and data processing systems; engineering and
operations; and development and execution of system test plans and
computer systems user support.


	       Satellite Controllers ($32.6K - $40.8K)

   Experience with spacecraft data acquisition, TDRSS scheduling,
spacecraft telemetry monitoring and command.  Console operations or
multimission satellite spacecraft experience is desired.

  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.  EUVE
  Principal Investigators and Newsletter Publishers: Dr. Roger F.
  Malina and Professor Stuart Bowyer.  Newsletter Editor: Brett A.
  Stroozas.  Funded by NASA contract NAS5-29298.  Send newsletter
  correspondence to

  The EUVE project is managed by NASA's GSFC: Paul Pashby, GSFC
  Project Manager; Dr. Yoji Kondo, Project Scientist; Dr. Ronald
  Oliversen, Deputy Project Scientist; Mr. Kevin Hartnett, Mission
  Director.  NASA HQ: Dr. Guenter Riegler, Program Manager.
  Information on the EUVE GO Program is available from Dr. Yoji Kondo,
  Mail Code 684, GSFC, Greenbelt, MD 20771 at (301) 286-6247 or e-mail

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