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Vol 3, No.  14 September 22, 1993                          ISSN 1065-3597

Project Seeks GO Science Contributions
	by Yoji Kondo & Ron Oliversen,
	Project & Deputy Project Scientists at GSFC
The Project is interested in promoting itself by helping the Guest
Observers (GO) disseminate their exciting EUVE results to NASA HQ, the
astronomical community, and the general public. We are, therefore,
soliciting your contributions from preliminary results to published
papers.  However, since most results in published papers are months to
even years away, we want to encourage and facilitate a more rapid
dissemination of information.  Most of these contributions are generally
meant to be short and informal.  The Project needs information for
monthly highlights to NASA HQ in which results can be summarized in a
couple of sentences.  We plan to use GO provided material in the
electronic EUVE Newsletter to convey new results and other helpful
information (e.g., coordinated observations, (p)reprints).  The hard
copy Quarterly EUVE Newsletter will offer the opportunity for articles
to include graphical information and appeal to a more general audience. 
We will also be looking for exciting results with profound impact on the
field of astrophysics which the NASA/Goddard Public Affairs Office could
consider for a formal press release.  All distributed information would
give full credit to the GO and anything rewritten or summarized in a
form different from the submitted material would be checked with the
author.  GOs with contributions should submit their materials to
Barry Welsh at CEA on Internet ("") who, in
coordination with the Project Science Office at Goddard, will attempt to
provide the GO with a wide dissemination of their information.

EUVE Detecting New Sources Serendipitously
	by Roger Malina, EUVE Instrument PI
Kelley McDonald, Nahide Craig and Martin Sirk have reported to the EUVE
science team the results of an initial search for serendipitous new EUV
sources discovered during calibration points and in the scanners during
GO pointings. They reported that in the 0.1 % of the sky examined so far,
six serendipitous sources were found. Four of these are new EUV sources
detected in Lexan, and one was a new detection in the Aluminum filter;
two were already reported in the BSL. Four of the serendipitous sources
have counterparts which (tentatively) are late type stars, one white dwarf
and one B star. One of the sources showed variability during the observation.
All the detected sources are much fainter than sources reported in the EUVE
Bright Source List due to the longer observing times. Searches for additional 
serendipitous sources are ongoing.

Minor Corrections to the EUVE Survey Bright Source List
	by Kelley McDonald, EUVE Data Analysis Support Staff

Some minor corrections have been made to the EUVE Survey Bright Source List
(BSL) which was released with the recent NASA EUVE Research Announcement for
Cycle 2 Guest Observer observations.  These corrections were made to the EUVE
Name assigned to a given source, as some round-off and truncation errors were
introduced when forming the EUVE source name from its Right Ascension and
Declination.  The original and corrected EUVE source names are shown below as
they will appear in the final BSL science paper in preparation for submission
to the Astronomical Journal.

         Old EUVE Name      Correct EUVE Name
	---------------     -----------------
	EUVE J0007+33.2      EUVE J0007+33.3      
	EUVE J0052-74.6      EUVE J0053-74.6      
	EUVE J0139-17.9      EUVE J0138-17.9      
	EUVE J0234-43.7      EUVE J0234-43.8      
	EUVE J0512-00.6      EUVE J0512-00.7      
	EUVE J0629-02.8      EUVE J0629-02.7      
	EUVE J0633+10.6      EUVE J0633+10.7      
	EUVE J1033-11.6      EUVE J1033-11.7      
	EUVE J1300+12.4      EUVE J1300+12.3      
	EUVE J2102+27.8      EUVE J2102+27.7      
	EUVE J2108-05.3      EUVE J2108-05.2      
	EUVE J2353-23.5      EUVE J2353-24.5      

New EUVE Publication

Publication #537
EUVE First Light Observation of the Diffuse Sky Background
Richard Lieu, Stuart Bowyer, Michael Lampton, Patrick Jelinsky,
  and Jerry Edelstein
To appear in Ap. J. Lett

Measurements of the diffuse extreme ultraviolet background in two filter
wavebands covering 50--190 angstroms and 160--360 angstroms, as obtained
during Extreme Ultraviolet Explorer (EUVE) first light observations, are
presented.  The data were gathered by the Deep Survey telescope while it
was pointed at a direction l=5.6 degrees, b=+1.3 degrees.  Correlation
studies of count rates reveal that the Deep Survey telescope is relatively
free from sources of terrestrial background.  Up to 40 minutes of data with
especially low background were identified.  All known components of the
observed background not attributed to diffuse astronomical emission have
been evaluated. An astronomical diffuse component in the 50--190 angstrom
band is detected with an intensity of 1.71 +/- 0.17 photons cm^(-2) s^(-1)
sr^(-1) angstrom^(-1), assuming a flat continuum.  In the 160--360 angstrom
band our data establish an upper limit to a flat continuum intensity of
3.63 photons cm^(-2) s^(-1) sr^(-1) angstroms^(-1), by far the lowest
measurement to date.  We have compared predictions of the Landini-Fossi thin
plasma line emission model with the EUVE results, the Wisconsin B band and
Be band data, and the ROSAT WFC observations.  It is demonstrated that no
single temperature plasma can explain all the data.

Call for GO Abstracts of EUVE Results
	by Roger Malina, EUVE Instrument PI

We encourage EUVE GO's to email us their abstracts of publications on
EUVE data for dissemination through the EUVE newsletter.
The EUVE Electronic Newsletter is issued by the Center for Extreme
Ultraviolet Astrophysics, University of California, Berkeley, CIA 94720,
USA. The opinions expressed are those of the authors. Publishers: 
R. Malina, C. Stuart Bowyer. Funded by NASA Contracts NAS5-30180 and
NAS5-29298. Send newsletter correspondence to: ceanews@cea.Berkeley.Edu
EUVE Public Archive via FTP: ftp.cea.Berkeley.Edu, pub/archive.
EUVE 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; email to euve@stars.SPAN.NASA.GOV

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