Circular No. 6088
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
[email protected] or FAX 617-495-7231 (subscriptions)
Phone 617-495-7244/7440/7444     TWX 710-320-6842 ASTROGRAM CAM
[email protected] or [email protected] (science)


SUPERNOVA 1994aa IN NGC 1320
     R. H. McNaught, Anglo-Australian Observatory, reports his discovery
of an apparent supernova of mag 17 at R.A. = 3h22m18s.48, Decl. =
-3d13'05".7 (equinox 1950.0), 10".1 east and 1".8 north of the center of
NGC 1320.  The object was detected on a U.K. Schmidt I plate taken by
C. P. Cass on Sept. 11 and confirmed on a CCD image taken by McNaught and
G. J. Garradd with the Siding Spring Observatory's 1.0-m reflector
on Sept. 17.  No image appears at the position on a J survey plate
taken in 1982.


KS 1730-312
     K. Borozdin, N. Alexandrovich and R. Sunyaev, Space Research
Institute, Moscow, on behalf of the MIR-KVANT team, report:
"This x-ray transient (cf. IAUC 6083) 
continues to increase in luminosity in
the standard x-ray spectral band.  According to data obtained on Sept. 26
with the MIR-KVANT-TTM coded-mask instrument, the spectrum can be
approximated by a power law with photon index 2.7 +/- 0.2 and column
density NH = 4 x 10**22 cm-2.  The flux at 4 keV was about 600 mCrab.
An even higher flux (850 mCrab at 4 keV) and softer spectrum were
detected on Sept. 28, when the power-law index was 4.2 +/- 0.2 and NH
= 8 x 10**22 cm-2.  Possibly this is another x-ray nova."


JUPITER AND COMET 1993e
     O. P. N. Calla, V. Sukumaran, B. M. Darji, M. R. Deshpande,
H. O. Vats, P. Janardan and N. M. Vadher, Space Applications Center
and Physical Research Laboratory, Ahmedabad, report: "Observations of
Jupiter before, during and after the impacts of fragments of comet
1993e made at 4.15 GHz using a 14-m dish at the Ahmedabad Earth Station
indicate that the microwave radio emission steadily increased after
the impact of fragment A on July 16.  This increase in continuum
emission was about 100 percent, and on July 25 the flux returned to
pre-impact level.  In addition, the four impacts K, N, P2 and S showed
large bursts of microwave emission of the order of 5.1, 5.2, 4.3 and
2.3 times, respectively.  These bursts were observed with a time delay
of about 30 min.  The duration of these bursts ranged from 19 to 36 min.
The digitally recorded data have a time resolution of 48 ms and are
being analyzed in detail."


1994 October 4                 (6088)              Brian G. Marsden