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IAUC 7804: 2002aj, 2002ak, 2002al, 2002am; 2001ig

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                                                  Circular No. 7804
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)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


SUPERNOVAE 2002aj, 2002ak, 2002al, 2002am
     A. Becker, T. Tyson, and D. Wittman, Bell Laboratories; M.
Lopez-Caniego, Universidad Autonoma de Madrid; D. Norman, Cerro
Tololo Interamerican Observatory (CTIO); A. Clocchiatti,
Universidad Catolica de Chile; I. Dell'Antonio, Brown University;
and G. Squires, Space Infrared Telescope Facility, California
Institute of Technology, on behalf of the Deep Lens Survey team,
report the detection of four apparent supernovae in V-band images
taken with the CTIO 4-m reflector (+ MOSAIC imager).

SN      2002 UT          R.A. (2000.0) Decl.      V      Offset
2002aj  Jan. 11.269   10 48 56.56  - 5 32 14.1   23.1   1".5 W, 1".8 S
2002ak  Jan. 11.269   10 49 04.32  - 5 55 33.7   22.6    ?
2002al  Jan. 11.311   10 50 21.71  - 4 15 05.9   23.6   3".1 E
2002am  Jan. 16.3     14 02 03.14  -10 35 23.9   19.1   2".9 W, 7".4 S

SNe 2002aj and 2002ak were not present in images taken on 2001 Mar.
25.12 UT, and SN 2002al was not present on 2001 Mar. 27.04 (all
2001 images involve five stacked 600-s V-band frames, with limiting
mag V = 25.5).  R-band images of SN 2002ak show a faint, diffuse
host galaxy.  SN 2002am was found by subtracting images taken on
2001 Apr. 24.3 from images obtained on 2002 Jan. 16.3; it was
confirmed with additional images and a spectrum taken by A.
Clocchiatti on Jan. 18.3 with the Las Campanas Observatory 6.5-m
Baade telescope (+ dual imager/spectrograph LDSS2).  The fully
reduced spectrum (range 400-800 nm; resolution 1.2 nm) shows that
SN 2002am is a type-Ia supernova, some 100 days after maximum light.
The approximate redshift of the parent galaxy is 0.03, obtained by
matching the features in the supernova spectrum with those of SN
1989B, 96 days after maximum light.  Additional photometry:  SN
2002aj, 2002 Jan. 14.273, R = 22.3; 14.285, V = 22.9.  SN 2002ak,
Jan. 14.273, R = 22.7; 14.285, V = 23.3.  SN 2002al, Jan. 14.220,
R = 22.8; 14.237, V = 23.9.


SUPERNOVA 2001ig IN NGC 7424
     Unfiltered CCD magnitudes by C. Bembrick, Bathurst, N.S.W.:
2001 Dec. 19.419 UT, 13.75; 21.435, 13.51; 22.435, 13.40; 24.433,
13.24; 26.430, 13.12; 27.443, 13.05; 28.4347, 13.00; 30.444, 12.96;
2002 Jan. 1.432, 13.00; 3.436, 12.94; 7.4451, 13.02.  Visual
magnitude estimates:  Jan. 6.540, 12.3 (A. Pearce, Nedlands, W.
Australia); 11.45, 12.8 (R. Evans, Hazelbrook, N.S.W.); 16.45, 13.0
(Evans); 18.537, 12.9 (Pearce).

                      (C) Copyright 2002 CBAT
2002 January 24                (7804)            Daniel W. E. Green

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