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IAUC 8052: 2002kh, 2002ki, and 2003N; N IN M31

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                                                  Circular No. 8052
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

SUPERNOVAE 2002kh, 2002ki, and 2003N
     S. Casertano, Space Telescope Science Institute, reports, on
behalf of the GOODS Treasury Team (cf. IAUC 7981, 8012, and 8038,
plus V. Laidler, with the support of ground-based images from P.
Capak and L. Cowie) and the Hubble Higher-z Supernova Team (+ M.
Hicken), the discovery of three new apparent supernovae in images
of the region around the Hubble Deep Field, each detected by
subtracting ACS images taken on 2002 Nov. 21-22 from those taken on
2003 Jan. 2-4.  SN 2003N was not obviously visible in the Nov.
images and was clearly visible in the Jan. images; SN 2002ki was
substantially brighter in the Nov. images but remained visible in
the January images; and SN 2002kh was not detected in the Jan. 2-4
images, but was clearly visible earlier.  Each apparent supernova
was detected independently in each of the four separate z-band
(F850lp) exposures taken at the relevant epoch, as well as in the
two i-band (F775W) and the two v-band (F606W) exposures.  The
offsets given below are from the centers of the nearest galaxies
visible in the ACS images.  The magnitude quoted for SN 2003N
assumes no supernova light in the earlier image.  Further z-band
magnitudes:  SN 2003N, 2002 Nov. 21.53 UT, [27.5; SN 2002ki, 2003
Jan. 4.61 UT, > 25.1 (uncertain due to unknown contribution of
host-galaxy light); SN 2002kh, 2003 Jan. 4.31, [27.0.

SN      2002/03       R.A.  (2000.0)  Decl.    z        Offset
2002kh  Nov. 22.31  12 36 16.78  +62 14 37.7  25.1   1".2 W, 0".3 N
2002ki  Nov. 22.69  12 37 28.35  +62 20 40.0  24.2   0".1 W, 0".0 N
2003N   Jan.  2.83  12 37 09.06  +62 11 00.7  25.9   0".0 W, 0".2 N

     A nova in M31 (= NGC 224) has been reported independently by
the LOTOSS group (M. Papenkova, J. Graham, and W. Li, University of
California at Berkeley; cf. IAUC 7906) and by a Padua group (M.
Fiaschi, F. Di Mille, R. Cariolato, and A. Frassati; cf. IAUC 7709).
The LOTOSS group reports a precise position of R.A. = 0h42m15s.75,
Decl. = +41o13'24".6 (equinox 2000.0), which is 323" west and 164"
south of the center of M31.  Fiaschi et al. report position end
figures 15s.77, 24".7.  Available magnitudes (K = from unfiltered
KAIT CCD images; H = H-alpha magnitudes from Fiaschi et al.):  2002
Nov. 10, [18 (H); 2003 Jan. 5 UT, [19.0 (K); 8.1, 16.5 (K); 11.73,
15.8 (H); 14.73, 16.4 (H).

                      (C) Copyright 2003 CBAT
2003 January 15                (8052)            Daniel W. E. Green

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