Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 4325: 1987B; 1987A; 1986n; OJ 287

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 4324 SEARCH Read IAUC 4326
IAUC number 

                                                  Circular No. 4325
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM    Telephone 617-495-7244/7440/7444


SUPERNOVA 1987B IN NGC 5850
     J. Menzies, South African Astronomical Observatory, telexes
that this object is of type II with strong H alpha and He I 587.6-nm
emission.


SUPERNOVA 1987A IN THE LARGE MAGELLANIC CLOUD
     J. Babel and A. D. Heynderyckx provide the following summary
of their seven-filter Geneva photometry at the European Southern
Observatory: Feb. 25.24 UT, V = 4.564, B-V [sic] = -0.737; U-B
[sic] = +0.518; 26.03, 4.517, -0.670, +0.677; 26.24, 4.509, -0.638,
+0.710; 27.01, 4.424, -0.494, +0.996; 27.24, 4.413, -0.470, +1.148;
28.01, 4.421, -0.314, +1.657; 28.09, 4.422, -0.299, +1.697.
     P. Whitelock, South African Astronomical Observatory, reports
the following infrared and provisional optical photometry on Feb.
26.8 UT by R. Catchpole and H. Winkler, respectively: J = 3.64, H
= 3.45, K = 3.22, L = 2.89; V = 4.44, B-V = +0.36, U -B = -0.31;
V-R = +0.33, V-I = +0.44.  J. Menzies notes that the spectrum had
changed markedly since Feb. 24.9 (cf. IAUC 4316): very broad H alpha
and beta (about 30 000 km/s wide) emission lines now made the spectrum
look much more like that of a type II supernova, although it still
seemed anomalous in some respects.
     R. M. Humphreys, T. J. Jones, K. Davidson, F. Ghigo and W.
Zumach, University of Minnesota, report preliminary colors for
Sanduleak -69 202 suggesting that it was slightly too red for a B3
I star.  They measured R = 11.94 +/- 0.18, I = 11.6 +/- 0.1 from the
ESO/SRC Survey SR and I transparencies using an automated scanner.


COMET SORRELLS (1986n)
     Further total visual magnitude estimates: Jan. 28.81 UT, 10.8
(S. Korth, Monheim, W. Germany, 0.36-m reflector); 30.46, 9.9 (J.
Kobayashi, Kumamoto, Japan, 0.31-m reflector); Feb. 1.17, 9.1
C. S. Morris, Lockwood Valley, CA, 0.26-m reflector).


OJ 287
     Visual magnitude estimates by R. Monella, Covo, Italy: Jan.
21.94 UT, 14.8; 24.96, 14.9; 31.99, 15.2.


1987 March 1                   (4325)              Brian G. Marsden

Read IAUC 4324 SEARCH Read IAUC 4326

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

Valid HTML 4.01!