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IAUC 5617: GRS 2037-404; N Sgr 1992 No. 2; N Cyg 1992

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                                                  Circular No. 5617
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505
MARSDEN@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)


GRS 2037-404
     A. J. Castro-Tirado, S. Brandt, and N. Lund, for the Granat
WATCH collaboration (Danish Space Research Institute, Lyngby; and
Space Research Institute, Moscow), report:  "On Sept. 23.192 UT, a
short-duration x-ray transient was observed by WATCH on Granat.
The transient lasted for 110 min and reached a peak intensity of
about 1 Crab, though with a somewhat softer spectrum.  The position
of the transient was R.A. = 20h37m10s, Decl. = -40 25'.0 (equinox
1950.0).  This position is well off the Galactic plane, and quick
optical follow-up may be rewarding."


NOVA SAGITTARII 1992 No. 2
     A. D. Scott and A. Evans, Department of Physics, Keele University;
and D. de Martino, International Ultraviolet Explorer (IUE)
Observatory, European Space Agency, communicate:  "IUE observations
of this object have been made on July 31 and Aug. 2.  Fine Error
Sensor V magnitudes indicate a fading of about 0.08 mag/day since
July 20.6 (IAUC 5566):  July 31.6 UT, 10.0; Aug. 2.9, 10.2.  The
ultraviolet spectrum from 120 to 190 nm is characterized by strong
emission lines of O I, C I, C II, N I, Si II, Al II, and Fe II,
with no evidence of He II (164 nm), C IV (155 nm), or C III] (191
nm).  The low-resolution ultraviolet spectrum closely resembles
that of the slow nova PW Vul at a similar stage of evolution.
Emissions of C II], N II], Fe II, and O III are detected in the
low-dispersion spectrum between 190 and 320 nm.  P-Cyg profiles
have been clearly observed in high-dispersion mode, indicating
velocities up to 3000 km/s.  A reddening of 0.35 +/- 0.05 is
determined from the 220-nm absorption feature, consistent with the
interstellar line equivalent widths observed in high-dispersion mode."


NOVA CYGNI 1992
     C. E. Woodward, University of Wyoming; and R. D. Gehrz,
University of Minnesota, report infrared magnitudes obtained with the
2.3-m Wyoming Infrared Observatory telescope:  Sept. 17.24 UT (with
bolometer), J = 9.09 +/- 0.53, H = 8.83 +/- 0.12, K = 8.26 +/-
0.09, L = 7.16 +/- 0.16, M = 5.85 +/- 0.17, N = 4.46 +/- 0.29;
Sept. 19.10 (with InSb detector), J = 8.44 +/- 0.11, H = 8.90 +/-
0.05, K = 8.18 +/- 0.06, L' = 6.90 +/- 0.06.


1992 September 24              (5617)            Daniel W. E. Green

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