Central Bureau for Astronomical Telegrams
IAUC 5584: 1992au; GRO J0422+32; N Cyg 1992; N Sco 1992
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Read IAUC 5585
Circular No. 5584
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)
SUPERNOVA 1992au IN ANONYMOUS GALAXY
M. Hamuy, Cerro Tololo Interamerican Observatory; and J. Maza,
University of Chile, report the discovery by R. Antezana (University
of Chile), on an objective-prism unfiltered IIIa-J plate (90-
min) taken by J. Maza and M. Wischnjewsky with the CTIO Curtis
Schmidt telescope on July 29.25 UT, of an apparent supernova (mpg
about 17) located about 21" east and 9" north of the nucleus of a
galaxy at R.A. = 0h08m08s, Decl. = -50 13'.6 (equinox 1950.0).
Confirmation was made by R. Aviles (CTIO) on CCD B and V images
obtained on Aug. 10.39 with the CTIO 0.9-m telescope.
GRO J0422+32
B. A. Harmon, R. B. Wilson, G. J. Fishman, and C. A. Meegan,
Marshall Space Flight Center, NASA; W. S. Paciesas and M. S. Briggs,
University of Alabama, Huntsville; M. H. Finger, Computer Sciences
Corporation; R. Cameron, Universities Space Research Association;
and R. Kroeger, and E. Grove, Naval Research Laboratory, report for
BATSE and OSSE: "The hard x-ray/gamma-ray transient discovered by
the BATSE experiment on the Compton Observatory (IAUC 5580) continued
to emit at high intensity, about 3 Crab (40-230 keV), over the
past three days. The Observatory was re-pointed on Aug. 11.07 UT,
so that the source is observable by all four Compton instruments.
An improved location based on combined BATSE and OSSE data is R.A.
= 4h22m.1, Decl. = +32 49' (equinox J2000.0; uncertainty radius of
0.2 deg). A significant flux is seen to at least 500 keV, with a
hard spectrum. The source continues to show strong variability on
all timescales."
NOVA CYGNI 1992
C. E. Woodward, and R. A. Hermann, University of Wyoming,
report the following infrared magnitudes, obtained using a bolometer
on the 2.3-m Wyoming Infrared Observatory telescope on July 28.4
UT: K = 8.21 +/- 0.17, L = 6.94 +/- 0.19, M = 5.87 +/- 0.28, [12.6
microns] = 2.28 +/- 0.33.
NOVA SCORPII 1992
Photometry by P. M. Kilmartin, Mt. John University Observatory:
Aug. 5.50 UT, V = 8.33 +/- 0.02, B-V = +1.11 +/- 0.01, U-B =
+0.21 +/- 0.04, V-R = +0.78 +/- 0.01, V-I = +1.60 +/- 0.02.
1992 August 12 (5584) Daniel W. E. Green
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