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Vol. 7, No. 6                 27 Jun 1997                    ISSN 1065-3597
	  (C) 1997, Regents of the University of California

Notes from the Editor
   by Brett A. Stroozas, EUVE Mission/Flight Director

   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 Public GO/RAP Data Release for 1 Jul 1997
    1.2 Abstracts of Recently *Accepted* EUVE Papers
 2. EUVE Satellite Operations News
    2.1 Flight Operations Status Report
    2.2 On-Line Access to EUVE
 3. EUVE Outsourced Extended Mission Status Report
    3.1 EUVE TPOCC Software Delivery Plan Set
    3.2 UCB/CEA Software Development Milestones Reached
    3.3 UCB/CEA Bids Farewell to George Kaplan

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
1997, completing and/or beginning observations of the following Guest
Observer (GO) and Right-Angle Program (RAP) targets.  For each target
is listed its name, spectral type (generally from the SIMBAD
database), observation start date and time (format is
day_of_year:hours:minutes), name of Principal Investigator (PI),
observation type/priority, and any relevant notes:

  Target        SpT          GMT Start        PI         T  Notes
NGC 4151        AGN:Sy1 120:23:40 (30 Apr)  Zdziarski    1  EGO,CO1
GD 358          WD:DB   127:10:20 (07 May)  Provencal    1  EGO,SPI
HU Aqr          CV:AM   129:05:00 (09 May)  Schwope      1  EGO,CO2
ksi UMa         G0V     134:11:15 (14 May)  Drake        1  EGO,CO3,RLL
EUVE J1725+021  NOID    134:11:15 (14 May)  Lampton      1  RAP
  Notes Key:
	CO1 = Coordinated observation with XTE satellite
	CO2 = Coordinated observation with ROSAT satellite
	CO3 = Coordinated observation with ASCA satellite
	EGO = EUVE Guest Observer observation
	RAP = Right-Angle Program observation
	RLL = Satellite roll change required during observation to
		avoid violating anti-sun pointing constraint
	SPI = Spiral-dithered observation

1. EUVE Science News

1.1 Public GO/RAP Data Release for 1 Jul 1997
        by Dr. Nahide Craig, EUVE User Support Scientist

   The table below lists the GO/RAP observations that become public on
1 Jul 1997.  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 EUVE Science 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 via postal
mail on 8mm tape or (if requested) on CD-ROM.

   The data rights policies for observations state that Principal
Investigators (PIs) have proprietary rights to their 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 observation.  See the UCB/CEA WWW site (address
below) for a complete list of publicly available EUVE data products.

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


  HZ 43		    6     10 Mar - 10 Mar 1993	  WD:DA    go0566 *
  PSR J0108-1431   40     19 Dec - 21 Dec 1994	  Pulsar   go0567
  Moon		    2     02 Feb - 02 Feb 1996    Moon     go0568	
  EUVE J1629+780  105     04 Nov - 08 Nov 1996    WD:DA    go0569 
  RE J0457-280     84     08 Nov - 11 Nov 1996    WD:DA    go0570 
  RE J0457-280     84     11 Nov - 14 Nov 1996    WD:DA    go0571      
  Diffuse         100     14 Nov - 17 Nov 1996    Bkgd     go0572       
  V471 Tau        101     18 Nov - 21 Nov 1996    WD:DA    go0573 
  gamma Tau        58     21 Nov - 23 Nov 1996    K0III    go0574 
  Sirius B        150     27 Nov - 02 Dec 1996    WD:DA    go0575     
  Sirius B        150     02 Dec - 07 Dec 1996    WD:DA    go0576  

	* = calibration target


  1512+370          2     19 Jan - 19 Jan 1995    AGN      rap0090
  HD 97334        108     04 Feb - 07 Feb 1995    G0V      rap0091
  EUVE J1149-343  192     20 Feb - 03 Mar 1995    NOID     rap0092
  EUVE J1258-70.4  81     13 Mar - 19 Mar 1995    NOID     rap0093
  EUVE J1058+190   26     19 Mar - 20 Mar 1995    NOID     rap0094
  EUVE J1436-38.2 341     22 Mar - 04 Apr 1995    NOID     rap0095
  US E~1028+310     3     19 Nov - 19 Nov 1995    NOID     rap0096
  MCG+08-12-003     4     22 Nov - 22 Nov 1995    AGN      rap0097
  EUVE J0647-506   74     22 Nov - 25 Nov 1995    NOID     rap0098
  EUVE J0648-482   74     22 Nov - 25 Nov 1995    NOID     rap0099
  MCG+08-12-003    37     15 Dec - 16 Dec 1995    AGN      rap0100
  MCG+08-12-003    41     20 Dec - 25 Dec 1995    AGN      rap0101
  EUVE_J0702-018   84     25 Dec - 28 Dec 1995    NOID     rap0102
  1418+546         31     19 Jan - 21 Jan 1996    AGN      rap0103
  WGA J1223+06     71     30 Apr - 03 May 1996    NOID     rap0104
  1214+074         71     30 Apr - 03 May 1996    AGN      rap0105
  1216+069         71     30 Apr - 03 May 1996    AGN      rap0106
  EUVE J1703-018    5     10 May - 11 May 1996    NOID     rap0107
  EUVE J1521-16.8 108     11 May - 14 May 1996    NOID     rap0108
  HD 42250         67     29 Sep - 02 Sep 1996    G5       rap0109
  0006+18          23     29 Sep - 29 Sep 1996    NOID     rap0110
  PN G215.5-30.8   86     02 Oct - 05 Oct 1996    NOID     rap0111
  EUVE J0505-181   86     02 Oct - 05 Oct 1996    NOID     rap0112
  GD 50           374     09 Oct - 23 Oct 1996    WD:DA    rap0113
  EUVE_J0341-016  368     09 Oct - 23 Oct 1996    NOID     rap0114
  EUVE J0532+510  101     28 Oct - 31 Oct 1996    NOID     rap0115
  EUVE J2027+52.5 101     18 Nov - 21 Nov 1996    NOID     rap0116


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 UCB/CEA
personnel, the UCB/CEA publication numbers are indicated.  Unless
otherwise noted, researchers may obtain preprints of the UCB/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 and for
posting under the UCB/CEA/EUVE WWW site.  Please send all abstracts to


N. Craig and A. Fruscione
To appear in Astronomical Journal.  [UCB/CEA publication #TBD]

   We report the optical identification of six sources detected in the
same directions during the all-sky surveys conducted by the Extreme
Ultraviolet Explorer satellite in the 58-174 A (0.071-0.214 keV)
extreme ultraviolet (EUV) band and the ROSAT Position Sensitive
Proportional Counter (PSPC) in the 0.1-2.4 keV X-ray band.  All the
sources correspond to newly discovered active galactic nuclei (one
quasi-stellar object, four Seyfert I galaxies, and one Seyfert II
galaxy) in the redshift range z = 0.071-0.382 and are the most likely
counterparts of the ROSAT PSPC X-ray sources.  In two cases the
sources are also the most probable optical counterparts of the EUV
detections while in the remaining cases further observations are
needed to confirm the EUV identification.  We discuss the EUV to soft
X-ray properties of these "soft" active galactic nuclei.


B.A. Stroozas, M.R. Gunter, G.C. Kaplan, R. Nevitt, K. Hartnett, and
  R.F. Malina
To appear in Proceedings of the IEEE International Conference on
  Systems, Man, and Cybernetics (SMC 97), 1997.  [UCB/CEA publication

   NASA's Extreme Ultraviolet Explorer (EUVE) satellite was launched
on 7 June 1992.  The EUVE Project is a joint collaboration between the
NASA Goddard Space Flight Center (GSFC) in Greenbelt, MD, and the
University of California at Berkeley (UCB).  Since launch, GSFC has
provided the overall project management and spacecraft operations
functions; those of science and payload operations have been performed
by the Center for EUV Astrophysics (CEA), a unit of the UCB Space
Sciences Laboratory.  Beginning in April 1996, UCB and GSFC began the
process of jointly "outsourcing" EUVE spacecraft operations from GSFC
to UCB.  This transition was successfully completed in March 1997.

   Operations automation has been, and continues to be, an integral
part of the success of the EUVE mission.  In February 1995, UCB worked
with GSFC to implement automated telemetry monitoring techniques for
the science payload. This automation allowed payload operations
personnel to move from three-shift, 24-hour monitoring to a
single-shift scenario.  Further refinements and domain experience
enabled the move to zero-shift "lights out" payload operations in
January 1996.

   GSFC and UCB have built on this operations automation experience
and successfully applied the technology to spacecraft operations. The
efforts have resulted in single-shift operations, a significant
reduction in Flight Operations Team (FOT) staffing levels versus those
at launch, and off-shift "lights out" automated spacecraft health and
safety monitoring. This paper discusses the history of the EUVE
spacecraft automation efforts at GSFC and UCB, the associated
spacecraft risk management, and some ideas for future automation


M.M. Shara, L.E. Bergeron, C.A. Christian, N. Craig, and S. Bowyer
To appear in Publications of Astronomical Society of the Pacific.
  [UCB/CEA publication #TBD]

   The Extreme Ultraviolet Explorer (EUVE) has been detecting EUV
sources since its launch in June 1992.  Positions of 540 sources have
been made available to the community by the EUVE team. We have
extracted 7' x 7' images centered on these 540 EUVE sources from the
Space Telescope Science Institute digitized sky archives. We present
these images as mosaic finder charts to aid observers trying to
identify EUVE sources, or to characterize known sources.


2. EUVE Satellite Operations News
	by Brett A. Stroozas, EUVE Mission/Flight Director

2.1 Flight Operations Status Report

   It has now been almost three months since the 14 Mar official
handover from GSFC to UCB/CEA of EUVE spacecraft operations
responsibility.  EUVE satellite operations from UCB/CEA continue to go
smoothly, and all flight and ground systems for both the spacecraft
and the science payload continue to perform well.  Now that EUVE
operations are settling down into a more normal routine, the UCB/CEA
Flight Operations Team (FOT) members are getting a short respite
before beginning to focus their efforts on improving operational
efficiencies and the science data return.

2.2 On-Line Access to EUVE

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

 o UCB/CEA World Wide Web (WWW) at URL:

 o anonymous FTP:

 o EUVE Electronic Newsletters

     Past issues -- available via the UCB/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 UCB/CEA can help YOU!  For more information see the
     UCB/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 UCB/CEA WWW site (address below) 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. EUVE Outsourced Extended Mission Status Report
	by Brett Stroozas, EUVE Mission/Flight Director

   Work continues to clean up the remaining open issues from the
outsourcing of EUVE Explorer Platform (EP) spacecraft operations from
GSFC to UCB/CEA.  The following sections describe some of the
outsourcing highlights from May 1997.

3.1 EUVE TPOCC Software Delivery Plan Set

   During the month of May UCB/CEA and GSFC agreed on a plan for the
final GSFC-funded delivery of EUVE-specific TPOCC software.  TPOCC --
the Transportable Payload Operations Control Center -- is the system
currently being used at UCB/CEA for spacecraft command and control.
The agreed-upon software plan outlines the contents of and delivery
schedule for this two-part "final" release.  Part one, which will be
delivered to UCB/CEA in Jun, will include fixes to all of the
remaining known bugs that have been deemed critical for operations.
Part two, which will be delivered to UCB/CEA in Sep, will include
fixes to the remaining bugs deemed urgent, as well as to a number of
others deemed routine.  The 3-month interim period between the two
parts of this release will allow time for the UCB/CEA FOT to
sufficiently exercise the software before its final close-out.  At
that point UCB/CEA will assume responsibility for funding any
additional EUVE-specific TPOCC development.

3.2 UCB/CEA Software Development Milestones Reached

   UCB/CEA reached a number of major software development milestones
during the month of May.  First, programmers completed work to
integrate the spacecraft telemetry and command project database (PDB)
with the existing system for the science payload.  The integrated PDB
is now under full configuration management, which provides a
controlled and easily maintained development environment.

   A second milestone was that, with the completion of the PDB work
above, programmers were able to turn their attention to expanding the
"eworks" automated telemetry monitoring system (used since Feb 1995
for the science payload) with the relevant rules for the spacecraft.
The full integrated payload and spacecraft eworks system should be
completed within the next few months.

   The third major software development milestone reached during the
month concerned UCB/CEA's efforts to assume the data management
responsibilities currently performed by the Packet Processor (PACOR)
facility at GSFC.  UCB/CEA programmers wrote and tested prototype
software that successfully accesses (via TPOCC) both realtime and tape
recorder playback data.  Now that these tests have proved the
methodology, the prototype code will be developed into an operational
system, which should be completed in the Fall of this year.

3.3 UCB/CEA Bids Farewell to George Kaplan

   On 1 May UCB/CEA bid a fond farewell to George Kaplan.  George
resigned from CEA and moved on to bigger and better things with the
Data Communications and Network Services group at UCB that serves the
entire campus.  George played a major and critical role in the EUVE
outsourcing effort, and is a major reason for its successful outcome.
George deserves our most sincere thanks and we wish him the best in
his new position!


  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.  EUVE Newsletter Editor: Brett
  Stroozas.  Funded by NASA/UCB Cooperative Agreement NCC5-138.  Send
  newsletter correspondence to

  The EUVE project is managed for NASA by UCB: Dr. Roger F. Malina,
  EUVE Observatory Director; Dr. John Vallerga, EUVE Observatory
  Deputy Director; Dr. Mike Gunter, EUVE Project Manager; Mr. Brett
  Stroozas, EUVE Mission/Flight Director; Mr. Rob Nevitt, EUVE
  Operations Manager.  NASA HQ: Dr. Guenter Riegler, Program Manager.


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