Central Bureau for Astronomical Telegrams
IAUC 6201: EUVE J1429-38.0; X-RAY N 1994 IN Sco AND GRS 1915+105
The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).
Read IAUC 6202
.dvi or
.ps format.
Circular No. 6201
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
Phone 617-495-7244/7440/7444 (for emergency use only)
EUVE J1429-38.0
N. Craig, University of California at Berkeley, communicates: "The
field of EUVE J1429-38.0 (R.A. = 14h29m24s.0, Decl. = -38d04'05", equinox
2000.0) was observed as part of the EUVE Optical ID Campaign on May 21.169
UT at Cerro Tololo InterAmerican Observatory with the 1.5-m
telescope (+ CCD GEC10). The proposed optical counterpart of EUVE
J1429-38.0 (R.A. = 14h29m27s, Decl. = -38d04'10", equinox 2000.0) is a star
lying 46" from the reported EUV center and is well within the source
error circle. The estimated apparent magnitude is mv = 12.0. [This may
be NSV 06680 = HV 7408--Ed.] Its optical spectrum clearly shows the
characteristics of a cataclysmic variable spectrum, with the typical
Balmer emission lines, as well as lines of He I, Ca II and strong He II
emission. The continuum increases toward the blue at short
wavelengths and toward the red at long wavelengths, indicating the
presence of a secondary red star. However, the inferred contribution
of the companion is not sufficiently strong to allow absorption lines
to be detected. EUVE J1429-38.0 was detected serendipitously through
the EUVE Right Angle Program (RAP) conducted with the survey (imaging)
scanners. As a result of the long exposures typical of spectrometer
and Deep Survey observations, the RAP program is up to 20 times
more sensitive than the EUVE all-sky survey. The source was detected
in the EUVE Lexan/B band on 1993 Mar. 4 with 0.009 cts/s. A further
EUVE RAP observation of this previously unidentified source was obtained
during 1995 Mar. 22-Apr. 4. These later data sets yield a countrate of
0.001 cts/s, indicating that the source is variable in the EUV. Monitoring
photometric and spectroscopic observations is urged. Any detection of
optical outbursts should be reported to the EUVE Associate Project
Scientist R. Oliversen (oliversen@stars.gsfc.nasa.gov) for possible
EUVE TOO (target of opportunity) observations."
X-RAY NOVA 1994 IN SCORPIUS AND GRS 1915+105
S. Sazonov and R. Sunyaev, on behalf of the GRANAT/WATCH Team, report:
"We are currently observing an outburst in the 1994 Scorpius x-ray nova
GRO J1655-40. The source was first marginally detected by GRANAT/WATCH
on July 23 with flux 200 +/- 100 mCrab at 8-20 keV. During July 25-30
its intensity daily averages were around 800 +/- 200 mCrab. This agrees
well with the single power-law spectrum reported by BATSE for the
20-200-keV spectral band (IAUC 6196). The outburst of GRS 1915+105
reported on IAUC 6196 is continuing. On July 29-30 the intensity of the
source in the 8-20-keV energy band was as high as 1 +/- 0.1 Crab."
1995 August 4 (6201) Brian G. Marsden
Read IAUC 6202
.dvi or
.ps format.
Our Web policy. Index to the CBAT/MPC/ICQ pages.
