Circular No. 8311

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 2004ax AND 2004ay

Two apparent supernovae have been reported on unfiltered CCD
images, SN 2004ax by D. Singer and W. Li (LOSS/KAIT; cf. IAUC 8307)
and SN 2004ay by T. Boles (cf. IAUC 8290).

SN      2004 UT        R.A.  (2000.0)  Decl.   Mag.     Offset
2004ax   Mar. 21.48  15 24 46.76  +68 43 56.3  17.7   3".6 E, 5".9 N
2004ay   Mar. 23.14  18 28 57.57  +51 38 55.7  18.1   0".2 E, 8".5 S

Additional approximate KAIT magnitudes for SN 2004ax in NGC 5939:
Mar. 6.52 UT, [19.0; 23.53, 17.7.  Additional magnitudes by Boles
for SN 2004ay in UGC 11255:  2003 Sept. 25, [19.5; Oct. 24, [19.5;
2004 Mar. 24.098, 18.1.  SN 2004ay also is not present on Digitized
Sky Survey red (1991) and blue images (1990).

Host galaxy info: vel = 6687 km/s, 0.9 x 0.5, 14.0, S?

SN type info: Ibc

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