From: Roger "F." Malina <rmalina@cea.berkeley.edu>
Subject: EUV SKY SURVEY PROCEEDS SMOOTHLY
Apparently-To: sci-space-news@ames.arc.nasa.gov
Followup-To: sci.space
Organization: Center for EUV Astrophysics, University of California at Berkeley
Date: Sun, 23 Aug 1992 21:05:02 GMT



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ELECTRONIC NEWSLETTER OF THE EUVE OBSERVATORY Vol 2, No.6 8/23/92
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FIRST EUVE RESULTS TO BE SUMMARISED AT AUG 31 COSPAR TALK
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Bowyer and Malina will present an overview of the EUVE in orbit
performance and early scientific results at the COSPAR/ World
Space Congress Aug 31 In Washington DC. ( at 3pm in the
session on recent results in X ray and EUV astronomy, in the
Washington Convention Center)

EUVE SCIENCE TEAM MEETING DISCUSSES FIRST WEEK OF EUVE SKY SURVEY
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The data from the first week of the EUVE sky survey are now begining
to yield initial results which were discussed at the Aug 21 EUVE
Science Team meeting. A strip of sky 2 degrees wide was fully scanned
by EUVE during the first week of data taking. The first processing
revealed timing errors in the processing which resulted in position
errors in the resulting maps and catalogues. These timing and boresight
offsets have been now been corrected.

Following these corrections, the software pipeline has produced maps
and catalogues for the initial week of data. Sources were detected in
all of the 4 all sky survey filters. Only one of these is at the
location of a previously reported ROSAT WFC XUV source. Each reported
source is now being analysed in detail to eliminate spurious sources.
In several cases bright B stars were found to be detected because
of the UV light detected at the location of one of the known pin
holes in the EUVE filters.  The software pipeline has now been
modified to remove from the data base  all data collected when a star
is in the vicinity of a pin hole; this reprocessed data will be
available next week. Because of the preliminary nature of the
results of the processing of the first week of the sky survey, no
specific results will be mentioned in this newsletter. Let it
just be said that we are very very excited by the encouraging results.

EUVE CONSISTENTLY SEES HIGHER COUNT RATES THAN THE ROSAT WFC
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A comparison of count rates observed by EUVE for several hot white dwarfs
was presented, as compared with the similar Lexan (S1) filter on the ROSAT WFC.
EUVE was found to observe a count rate a factor of 3 higher than the
ROSAT WFC for the EUVE all sky survey lexan channel, and a fact of 5 higher for
the EUVE deep survey Lexan channel.

One source analysed  at this time for which EUVE has seen a lower count
rate than the ROSAT WFC lexan (S1) band is the AM Her type cataclysmic variable
RE 1938-461. Ground based optical data indicates that the catclysmic variable
is now much fainter optically than when it was observed by ROSAT WFC.

EUVE PUBLIC ARCHIVE RELEASES SPECTRUM OF AU MIC
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AU MIC was used as as an EUVE calibration target. AU MIC was seen
to flare during the observation and a bright emission line
spectrum was recorded. AU MIC was strongly detected in the short and medium
wavelength channels. The emission lines will be used to carry
out in-orbit wavelength calibration of the spectrometer. The
EUVE public archive has just released the raw uncalibrated
spectrum of AU MIC. The spectrum may be obtained from
the public archive to aid Guest Observers in planning their
EUVE observations but may not be used for scientific publications
at this time. (similar data rights contraints apply to all
EUVE spectra releaed to date).

If you have not used the EUVE public archive you may obtain help
by sending email to archive@cea.berkeley.edu with a message
containing the word "help" (omit quotes) on the first line with
no preceding spaces. A file containing information will be
returned to you automatically.

EUVE PUBLIC ARCHIVE RELEASES RAW EUV SPECRUM OF EXTRAGALACTIC OBJECT
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The EUVE Public archive has released the raw uncalibrated spectrum of
the extragalactic object PKS 2155 -304. The source is detected
in the short wavelength spectrometer channel only.

EUVE ARCHIVE RELEASES MOON IMAGES IN THE EUV
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During the first week of August, the Moon was seen in all three of
EUVE's scanners.  Hard-copy images are now available by sending
e-mail to archive@cea.berkeley.edu.  Please be sure to include your
postal address with the request.

NEW EUVE DATA RIGHTS POLICY
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A statement of the policy on data rights is now available
from the EUVE Public Archive via ftp.  The file Datarights.txt
describes the proprietary limitations on three types of data: 
(A) All sky survey scanner data, (B) Deep sky survey data
(including data from both the calibration and survey periods and
from the pointed observations), and (C) spectrometer data (i.e., 
spectra used to calibrate the spectrometer).  This file will be
updated with the latest information on EUVE data rights. For further
information or clarification on the EUVE data rights policy, please
contact the EUVE Project Scientist Dr Yoji Kondo.

EUVE CARRIES OUT DAY-TIME DATA TAKING TEST
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A test was carried out to establish EUVE count rates observed during the day
time by each detector. As a result of this test the EUVE orbital
night time data taking has been redefined to be 13% longer because
count rates were low enough to assure quality data. Further tests are
planned to determine which detectors could be operated safely during
orbital day time.

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The EUVE Electronic Newsletter is issued by the  Center  for  Ex-
treme  Ultraviolet Astrophysics, University of California, Berke-
ley. The opinions expressed are those of the  authors.   Publish-
ers:  Roger F. Malina, C. Stuart Bowyer, Managing Editor: Camille
Trentacoste.  Funded by NASA Contracts NAS5-30180 and  NAS5-29298
Send newsletter correspondence to: pub@cea.berkeley.edu (Internet)
EUVE Public Archive via FTP: cea-ftp.cea.berkeley.edu, pub/archive
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The EUVE Project is managed by NASA's GSFC.  The Project  Manager
at  GSFC  is  Mr.  Frank Volpe, the Project Scientist is Dr. Yoji
Kondo, the Deputy Project Scientist is Dr. Ronald Oliversen.  The
NASA  Headquarters  EUVE Program Scientist is Dr. Robert Stachnik
the Deputy Program Scientist is Dr.  Derek  Buzasi,  the  Program
Manager  is  Mr.  John  Lintott.  Information  on  the EUVE Guest
Observer Program is available from: Dr. Yoji Kondo, Mail Code 684
GSFC, Greenbelt, MD 20771 (301)286-6247; euve@stars.SPAN.NASA.GOV
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