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ELECTRONIC NEWSLETTER OF THE EUVE OBSERVATORY
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Vol 5, No. 10 24 Oct 1995 ISSN 1065-3597
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Notes from the Editor
=====================
by Brett A. Stroozas, ISO Manager
Welcome to the electronic newsletter for NASA's Extreme Ultraviolet
Explorer (EUVE) satellite, compiled and published monthly by the
Integrated/Intelligent Science Operations (ISO) group at 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. Science News
1.1 Recent EUVE Science Highlights
1.2 Abstracts of Recently *Accepted* EUVE Papers
2. Science Operations News
2.1 Public Data Release for 1 Nov 1995
2.2 TIF Reset Caught by AI Software
2.3 ESOC Procedures Augmented Using FrameMaker 5
2.4 On-Line Access to EUVE
3. Educational Outreach: Innovative CEA Information Server
4. CEA Job Listings
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 Sep
1995, conducting observations of the following guest observer (GO)
targets (alternate name and spectral type information taken from the
SIMBAD or internal CEA databases; "NOIDs" are unidentified objects):
===================================================================
Target Alternate Spectral Observation
Name Name Type GMT Date(s) Notes
===================================================================
epsilon Eri HD 22049 K2V 31 Aug - 04 Sep 1995 ---
Comet D'Arrest -------- Comet 04 Sep - 05 Sep 1995 ---
1857+0943 -------- NeutSt 04 Sep - 05 Sep 1995 RAP
epsilon Eri HD 22049 K2V 05 Sep - 12 Sep 1995 ---
Moon -------- SolSys 12 Sep - 12 Sep 1995 ---
epsilon Eri HD 22049 K2V 12 Sep - 13 Sep 1995 ---
CC Eri HD 16157 M0Vp 13 Sep - 18 Sep 1995 ---
M15 NGC 7078 LMXB 13 Sep - 18 Sep 1995 RAP
Survey -------- ---- 18 Sep - 20 Sep 1995 CAL
ER Vul HD 200391 G0V+ 20 Sep - 27 Sep 1995 ---
PW And HD 1405 GV 27 Sep - 05 Oct 1995 ---
===================================================================
Key to Notes:
CAL = star tracker calibration
RAP = simultaneous Right Angle Program (RAP) imaging observation
1. Science News
===============
1.1 Recent EUVE Science Highlights
----------------------------------
by Dr. Antonella Fruscione, EUVE Scientist
Dr. Geraldine J. Peters (Space Sciences Center, University of
Southern California) reports on a 60 ksec EUVE observation of the
B7IVe star alpha Columbae. The observation began on 5 March 1995 and
has revealed the likely detection of an emission line of Ne VII at
88.2 A at about the 3-sigma level. Possible emission features of Si
VI/Fe IX at 83.4 A and Ne VII at 97.5 A are also seen.
Located at a distance of 46 parsecs, roughly in the direction of
the Canis Major interstellar tunnel, alpha Columbae displays a low
column density of N(H) = 2.34E18 cm^(-2). It is the second nearest Be
star (after alpha Eridani) and the one with the lowest interstellar
medium column density.
According to the tables of line diagnostics published by Raymond &
Smith, Mewe & Brown, and Landini & Monsignori-Fossi, the above
emission lines would peak in a plasma of about 650,000 K. The line
formation region in alpha Columbae thus has a significantly higher
temperature than the star's photosphere, (about 14,000 K), disk (about
10,000 K), or wind (about 40,000 K), and may reside either at a
"boundary layer" where collapsing material from the inner disk impacts
the photosphere or at the top/bottom periphery of a wind-compressed
disk (Bjorkman & Cassinelli, 1993, ApJ, 409, 429) where a standing
shock probably exists.
Four IUE images acquired on 6-8 March 1995 confirm the strong
presence of C IV and Si IV wind absorption similar to that reported in
Marlborough & Peters (1986, ApJS, 62, 875). No wind variability was
apparent. Since the star's radiation field is incapable of driving
this wind, some other mechanism must be responsible for the mass loss.
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 EUVE 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 pub@cea.berkeley.edu.
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 Home
Page. Please send all abstracts or preprints to
archive@cea.berkeley.edu.
--------------------------------------------------------------
THE BERKELEY SPECTROMETER FOR ORFEUS: LABORATORY AND IN-FLIGHT PERFORMANCE
M. Hurwitz and S. Bowyer
To appear in Proceedings of the IAU Colloquium 152, Astrophysics in
the Extreme Ultraviolet, ed. S. Bowyer & R.F. Malina, Cambridge U.
Press, 1995. [CEA publication #662]
The Berkeley spectrometer aboard the ORFEUS payload achieved a
variety of "firsts" during its inaugural mission in September 1993.
The instrument utilizes spherical gratings with mechanically ruled
varied line-spacing, and curved microchannel plate detectors with
delay-line anode readout systems, to cover the 390-1200 A band at a
resolution of lambda / 5000. The instrument will be discussed, and
its performance illustrated with calibration and in-flight spectra.
Science highlights from the ORFEUS-I mission will be presented (oral
presentation only). The payload will be available for use by guest
investigators during the ORFEUS-II mission currently scheduled for
late 1996.
--------------------------------------------------------------
2. Science Operations News
==========================
2.1 Public Data Release for 1 Nov 1995
--------------------------------------
by Dr. Nahide Craig, Archive Scientist, ISO Science Support Team
The table below lists the GO observations that become public on 1
Nov 1995. For each entry is given the target name, the approximate
exposure time in ksec, the GMT start and end date(s) for the
observation, the spectral type of the target, and the data
identification code. 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 policy for GO observations states that GOs have
proprietary rights to the data for one year 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 one-year proprietary
period begins after the GO is sent the final piece of the completed
observation.
===============================================================
Target ~Exp Observation Date(s) SpT DataID
Name (ksec) Start End
===============================================================
Data Sets Available 1 Nov 1995:
CF_TUC 100 28 Aug - 31 Aug 1994 RSCVn go0232
CF_TUC 100 31 Aug - 04 Sep 1994 RSCVn go0233
CF_TUC 100 04 Sep - 07 Sep 1994 RSCVn go0234
===============================================================
2.2 TIF Reset Caught by AI Software
-----------------------------------
by Marty Eckert, Research Associate, ISO Science Instrument
Support Team
On 5 Oct near 00:00 GMT, during the reconfiguration for the next
observation, a single-event-upset (SEU) caused a reset to the
telescope interface unit (TIF) for the long-wavelength scanning
telescope (Scanner C). This is the first instance of an instrument
hardware anomaly since CEA began using an augmented intelligence (AI)
software package -- "eworks" -- in Jul 1994 to autonomously monitor
the health and safety of the science payload. In its first real test
eworks performed exactly as expected, recognizing the anomalous
condition in the real-time telemetry and triggering a pager.
Since this event occurred near the end of the normal day shift, the
duty controller then responded to the anomaly, diagnosing it as a TIF
reset. Further investigation of the telemetry revealed the cause to
be an SEU and that the instrument was in a safe state. The following
day the TIF memory map was verified and the instrument was returned to
its normal observation configuration, some 18 hours after the anomaly.
Luckily, since the affected observation required that the Scanner C
detector be at half voltage (functionally off), there was no science
data loss.
This anomaly situation provided CEA with a validation and "proof of
concept" for both the AI monitoring and paging software systems and
for the procedures that define how the controllers respond to such events.
2.3 ESOC Procedures Augmented Using FrameMaker 5
------------------------------------------------
by Frank Kronberg, Research Associate, ISO Science Instrument
Support Team
Version 5 of the commercial word processing package "FrameMaker"
has been installed on the CEA file systems. The new features of
FrameMaker 5 are being utilized to provide a more robust and powerful
visual display interface to the science payload operations procedures.
All hyper-links and cross references are now color-coded so that an
operator can quickly review all the links on a page. In addition,
cascading menus have been created that present the operator with
various categories (e.g., Emergency, Operations, Communications, and
Commanding) in order to facilitate the location of information and for
the movement from one area of the procedures to another. A
color-coded alphabetized side-bar allows the operator to jump to any
page in the hyper-linked index.
This user-friendly, color-coded, hyper-text-based interface to the
science payload operations procedures is another aspect of CEA's
continuing attempts to streamline nominal payload operations and the
anomaly response process. As a direct result of the success of the
three-shift to one-shift transition completed in early 1995, initial
work is underway to review and prepare all of the procedures for a
zero-shift operations scenario. [See next month's newsletter for more
on the one-shift to zero-shift transition. -- Ed.]
2.4 On-Line Access to EUVE
--------------------------
Listed below are the various methods for on-line access to EUVE:
o CEA World Wide Web (WWW)
URL http://www.cea.berkeley.edu/
telnet www.cea.berkeley.edu 200 (for those without a WWW browser)
o anonymous FTP
ftp ftp.cea.berkeley.edu
Name: anonymous
Password: type_your_full_e-mail_address
o anonymous gopher
gopher ftp.cea.berkeley.edu
o EUVE Electronic Newsletters
Past issues -- available via the CEA WWW site
Subscriptions -- mail majordomo@cea.berkeley.edu ("subscribe euvenews")
Post message 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 CEA can help YOU! For more information see the CEA
WWW site or contact the Archive (archive@cea.berkeley.edu).
o Public RAP
The Public Right Angle Program (RAP) is an 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
(egoinfo@cea.berkeley.edu). Mail all proposals to
euverap@cea.berkeley.edu.
o Contact information for the EUVE Science Archive or GO Center:
Center for EUV Astrophysics
2150 Kittredge St.
Berkeley, CA 94720-5030
Archive EGO Center
510-642-3032 (voice) 510-643-8727 (voice)
510-643-5660 (fax) 510-643-5660 (fax)
archive@cea.berkeley.edu egoinfo@cea.berkeley.edu
3. Educational Outreach: Innovative CEA Information Server
===========================================================
by Frank Kronberg, Research Associate, ISO Science Instrument
Support Team
The CEA archive is accessed by many different users who are looking
for a great variety and wide range of information. These users include
guest scientists and other professionals in the astrophysics
community, interested amateur astronomers, engineers and technicians
from other science projects and from space technology companies, K-12
educators, Internet surfers from the general public, and users from
within the CEA and EUVE project.
Our plans for future EUVE Educational Outreach activities continue
to rely on the Internet as their primary publishing tool. However, its
use will be facilitated by the development of an innovative
information server based on an existing CEA WWW resource, the Spectral
Browser. The Spectral Browser is an HTML-based form that, based on
user input parameters, queries the EUVE target information files and
returns the requested science data formatted according to the user's
specifications. This resource gives users the ability to search and
recover material from the EUVE science data archive without having to
know how or where the data are stored.
The Innovative CEA Information Server developed for the Educational
Outreach Program will allow the user to select material from the EUVE
Mission Archive. As part of another CEA project, the EUVE Knowledge
Base, the Archive will be logically structured into "knowledge units",
which are defined to be all of the information about a small,
self-contained subject, encapsulated into a single multi-media object.
A user will be able to query the Archive by specifying parameters that
indicate the desired levels of complexity, breadth, scope, format
(e.g., text or graphics), etc., of the requested KUs.
The K-12 education materials for this Server are being developed at
CEA via a teacher intern program. Dr. Nelli Levandovsky, a physics
teacher from a local high school, created the following two tutorial
plans this past summer:
o "Be an Engineer -- Learn how to Operate a Satellite"
o "Be a Scientist -- Learn how to Become a Space Researcher"
Future tutorial plans will include such topics as the following:
o NASA and its Explorer Program
o The EUVE Mission
o The EUVE Satellite
o The EUVE Science Payload and Instruments
o UV and EUV Radiation and the Electromagnetic Spectrum
o The Center for EUV Astrophysics
o The EUVE Science Operations Center
Current development efforts within CEA are concentrated in two
areas: (1) reviewing types of EUVE archival data how the KUs can be
packaged and presented ; and (2) investigating how the concepts of the
breadth (i.e., scope or extent) and depth (i.e., complexity) of the
KUs can be applied to the construction of the Server. For example, a
scientist seeking a specific parameter is looking for information that
is deep, but has little breadth; conversely, a teacher preparing a
science lesson plan will focus on a broad range of topics and
information, and only include enough depth as is appropriate for the
age and educational levels of the students.
4. CEA Job Listings
===================
by Cathie Jones, CEA Personnel Manager
Programmer Analyst II, Job # 09-323-30 (full-time career position)
Serve as a software engineer at the Center for EUV Astrophysics.
Design prototype software systems for low cost automated satellite
operations and human computing. General programming areas will be
supporting Artificial Intelligence (AI) research in
model/rule/constraint-based reasoning as applied to orbiting vehicles
and data acquisition/control loops.
Qualifications include a strong background in Electrical
Engineering, Computer Science, Space Engineering, and/or Information
Systems, with proven software development experience required.
Experience with the design and implementation of AI software, and
orbiting vehicle ground/flight software design required. Experience
in a combination of the following: UNIX (SUN, SGI, HP), C, C++, LISP,
Fortran, and scripting; development of intelligent image processing
systems, fault diagnosis, fuzzy controllers, network algorithms and
protocols, network based parallel computing; product design
experience. CASE tool experience a plus. Experience with WWW
(Netscape, Mosaic), GUI development, windowing systems preferred.
To apply, formal resume must be submitted to:
Personnel Office #3540
Box 09-323-30
2200 University Ave.
Berkeley, CA 94720-3540
---------------------------------------------------------------------------
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. R.F. Malina and Professor
S. Bowyer. ISO Manager and Newsletter Editor: B.A. Stroozas. Funded
by NASA contracts NAS5-30180 and NAS5-29298. Send newsletter
correspondence to ceanews@cea.berkeley.edu.
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, Project Operations Director. NASA
HQ: Dr. Robert Stachnik, Program Scientist; Dr. G. Riegler, Program
Manager. Information on the EUVE Guest Observer Program is available
from Dr. Y. Kondo, Mail Code 684, GSFC, Greenbelt, MD 20771 at (301)
286-6247 or e-mail to euve@stars.span.nasa.gov.
END-----------EUVE------------ELECTRONIC---------------NEWS-------------END
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