Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 5634: N Sgr 1992 No. 3; 1992bb; 1992t; N Cyg 1992

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 5633  SEARCH Read IAUC 5635

View IAUC 5634 in .dvi or .ps format.
IAUC number

                                                  Circular No. 5634
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

     Paul J. Camilleri, Cobram, Victoria, Australia, reports his
photographic discovery (using an 85-mm camera lens + T-Max 400
film) of an apparent nova, providing the following photovisual
magnitude estimates:  Sept. 29.41 UT, [12; Oct. 13.40, 9.0.  Camilleri
notes that there is no image in the immediate position of the nova
on Union Observatory prints from 1927 Aug. 19, to a limiting
magnitude of 15.
     R. H. McNaught, Anglo-Australian Observatory, confirms the
apparent nova from a pair of CCD images taken with the 1.0-m reflector
at Siding Spring on Oct. 13.54.  The nova's position is R.A. =
18h20m37s, Decl. = -23 01'.4 (equinox 1950.0).  The object lies
about 1' east and 3' north of SAO 186756.  The brightest possible
candidate on the ESO B and R and the SERC J surveys is a star of
mag about 18.

SUPERNOVA 1992bb IN IRAS 21156-0747
     M. Della Valle and R. Corradi, European Southern Observatory,
report:  "A spectrogram (range 490-690 nm, resolution about 1 nm)
of SN 1992bb (cf. IAUC 5629) was obtained with the 1.5-m telescope
(+ Boller & Chivens spectrograph) at La Silla on Oct. 6.2 UT.
Preliminary analysis reveals this object to be a type-Ia supernova.
The expansion velocity deduced from the minimum of the Si II 635-nm
absorption is about 10 000 km/s."

     Total visual magnitude estimates (cf. IAUC 5627):  Oct. 2.05
UT, 9.0 (G. Kronk, Troy, IL, 0.33-m reflector); 3.50, 8.6 (C. S.
Morris, Pine Mountain Club, CA, 20x80 binoculars); 4.37, 8.4 (D. W.
E. Green, near Franklin, NH, 12x50 binoculars); 6.39, 8.6 (J. E.
Bortle, Stormville, NY, 20x80 binoculars); 7.39, 8.2 (Bortle);
7.50, 8.3 (C. S. Morris, near Mt. Wilson, CA, 20x80 binoculars);
8.15, 8.0 (R. Haver, Viterbo, Italy, 15x80 binoculars); 9.51, 8.0
(Morris); 12.98, 7.9 (Bortle).

     Photometry by R. Monella, Covo, Italy:  Sept. 27.892 UT, V =
9.29, B-V = +0.17; 30.934, 9.32, +0.16; Oct. 2.967, 9.32, +0.17
(comparison star BD +52 2734).

1992 October 13                (5634)            Daniel W. E. Green

Read IAUC 5633  SEARCH Read IAUC 5635

View IAUC 5634 in .dvi or .ps format.

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

Valid HTML 4.01!