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ELECTRONIC NEWSLETTER OF THE EUVE OBSERVATORY
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Vol. 7, No. 6 27 Jun 1997 ISSN 1065-3597
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(C) 1997, Regents of the University of California
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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 ceanews@cea.berkeley.edu (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
===============================================================
GO DATA SETS AVAILABLE 1 JUL 1997:
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
RAP DATA SETS AVAILABLE 1 JUL 1997
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 pub@cea.berkeley.edu.
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
archive@cea.berkeley.edu.
--------------------------------------------------------------
OPTICAL IDENTIFICATION OF JOINT EUVE AND ROSAT DETECTIONS IN THE
SOUTHERN HEMISPHERE: SOFT ACTIVE GALACTIC NUCLEI
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.
--------------------------------------------------------------
EUVE EXTENDS AUTOMATED "LIGHTS OUT" PAYLOAD OPERATIONS TO SPACECRAFT
PLATFORM
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
#TBD]
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
efforts.
--------------------------------------------------------------
AN OPTICAL ATLAS OF EXTREME ULTRAVIOLET EXPLORER (EUVE) SOURCES
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: http://www.cea.berkeley.edu/
o anonymous FTP: ftp.cea.berkeley.edu
o EUVE Electronic Newsletters
Past issues -- available via the UCB/CEA WWW site
Subscriptions -- mail majordomo@cea.berkeley.edu ("subscribe
euvenews")
Post message (moderated) to all subscribers:
mail euvenews@cea.berkeley.edu
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
(archive@cea.berkeley.edu).
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 (egoinfo@cea.berkeley.edu). Mail all proposals to
euverap@cea.berkeley.edu.
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)
archive@cea.berkeley.edu
egoinfo@cea.berkeley.edu
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 ceanews@cea.berkeley.edu.
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.
END-----------EUVE------------ELECTRONIC---------------NEWS-------------END
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