Circular No. 8335

Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science) URL http://cfa-www.harvard.edu/iau/cbat.html Phone 617-495-7244/7440/7444 (for emergency use only)

SUPERNOVAE 2004bm, 2004bn, 2004bo, 2004bp

Four apparent supernovae have been reported from unfiltered
CCD survey images:  SN 2004bp by M. Armstrong (cf. IAUC 8320) and
the remainder by D. Singer, J. Burket, and W. Li (LOSS/KAIT; IAUC
8329).

SN       2004 UT        R.A.  (2000.0)  Decl.   Mag.     Offset
2004bm   Apr. 25.21   10 52 35.33  +22 56 05.5  17.5   6".2 W, 2".5 N
2004bn   Apr. 23.23   10 52 31.06  + 7 13 41.2  18.8   1".3 W, 11".5 N
2004bo   Apr. 30.28   13 26 06.39  -19 46 32.6  17.0   19".8 W, 3".8 N
2004bp   May   3.94   11 09 53.25  +37 00 06.4  18.0   14".2 E, 0".6 S

Additional approximate magnitudes from the respective discoverers:
SN 2004bm in NGC 3437, Mar. 15.22 UT, [19.0; May 2.23, 17.5.  SN
2004bn in NGC 3441, Jan. 2.40, [19.5; Apr. 24.19, 18.8; May 4.21,
18.7.  SN 2004bo in ESO 576-G54, Mar. 31.32, [19.0; Apr. 13.31,
17.0; May 5.35, 17.0.  SN 2004bp in MCG +06-25-14, 1989 Jan. 14,
[20.8 (Palomar Sky Survey, red); 1990 Apr. 21, [22.5 (Palomar Sky
Survey, blue); 2002 Feb. 22, [19.0; 2004 Apr. 21.99, 19.5 (hint);
May 4.943, 18.0. 

Host galaxy info: vel = 7024 km/s, 1.1 x 0.7, 15.14, (R')SAB(s)0-?

SN type info: Ia

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