Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 6042: 1994W; JUPITER AND 1993e

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 6041  SEARCH Read IAUC 6043

View IAUC 6042 in .dvi or .ps format.
IAUC number

                                                  Circular No. 6042
Central Bureau for Astronomical Telegrams
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

     G. Cortini and M. Villi, Valbura, Italy, report their visual
discovery on July 29.85 UT of an apparent supernova of mag about
13.5 located about 1' north of the center of NGC 4041 (R.A. =
11h59m.6, Decl. = +62o25', equinox 1950.0).  The object was fainter
than mv about 14.5 (not seen) on July 11.8.  R. Barbon and U.
Munari, Asiago Astrophysical Observatory; and A. Bragaglia, Bologna
Astronomical Observatory (BAO), report that CCD images secured on
July 30.9 with the 1.5-m telescope of BAO show SN 1994W to be
superimposed on a galaxy arm and located 18" north, 9" west of the
galaxy's nucleus.  C. Pollas and Liu Zongli also confirm the
existence of this new object on panchromatic films obtained July 30
with the Schmidt telescope at Observatoire de la Cote d'Azur.

     M. J. Klein and S. Gulkis, Jet Propulsion Laboratory, report a
pronounced increase in the microwave radio emission from Jupiter
apparently associated with the bombardment of the planet by P/
Shoemaker-Levy 9:  "The increase in radio intensity began soon after
July 16 and peaked July 23, when the flux density reached 7.5 Jy.
This measurement represents a 25-percent increase over the baseline
measurements that began in 1993 Dec. and continued until 1994 July
16.2 UT, just hours before the impact of fragment A.  The flux
density has been slowly fading each day since July 23, but is still
much higher than normal on July 27.  The flux density reported here
is not the peak flux; it is the A0 term of the Fourier-series fit
(1989, NASA SP-494, pp. 151-155) to the System-III rotation (beaming)
curve repeatedly measured with the Goldstone 70-m antenna during
the baseline measurements.  The current observations are being
made with a 34-m antenna at NASA's Goldstone Deep Space Communication
Complex.  The prime frequency is 2295 MHz with right circular
polarized feeds.  Simultaneous measurements are being made at 8420
MHz (left circular polarized), but data have not yet been reduced.
Observations will continue for at least several weeks.  These new
results are consistent with, and tend to corroborate, the 50-
percent increase that was reported at 843 MHz by Hunstead and
Campbell-Wilson (IAUC 6038)."

1994 July 30                   (6042)            Daniel W. E. Green

Read IAUC 6041  SEARCH Read IAUC 6043

View IAUC 6042 in .dvi or .ps format.

Our Web policy. Index to the CBAT/MPC/ICQ pages.

Valid HTML 4.01!