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

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                                                  Circular No. 7804Central Bureau for Astronomical TelegramsINTERNATIONAL ASTRONOMICAL UNIONMailstop 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 0081-0304Phone 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, CerroTololo Interamerican Observatory (CTIO); A. Clocchiatti,Universidad Catolica de Chile; I. Dell'Antonio, Brown University;and G. Squires, Space Infrared Telescope Facility, CaliforniaInstitute of Technology, on behalf of the Deep Lens Survey team,report the detection of four apparent supernovae in V-band imagestaken with the CTIO 4-m reflector (+ MOSAIC imager).SN      2002 UT          R.A. (2000.0) Decl.      V      Offset2002aj  Jan. 11.269   10 48 56.56  - 5 32 14.1   23.1   1".5 W, 1".8 S2002ak  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 E2002am  Jan. 16.3     14 02 03.14  -10 35 23.9   19.1   2".9 W, 7".4 SSNe 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 (all2001 images involve five stacked 600-s V-band frames, with limitingmag V = 25.5).  R-band images of SN 2002ak show a faint, diffusehost galaxy.  SN 2002am was found by subtracting images taken on2001 Apr. 24.3 from images obtained on 2002 Jan. 16.3; it wasconfirmed with additional images and a spectrum taken by A.Clocchiatti on Jan. 18.3 with the Las Campanas Observatory 6.5-mBaade telescope (+ dual imager/spectrograph LDSS2).  The fullyreduced spectrum (range 400-800 nm; resolution 1.2 nm) shows thatSN 2002am is a type-Ia supernova, some 100 days after maximum light.The approximate redshift of the parent galaxy is 0.03, obtained bymatching the features in the supernova spectrum with those of SN1989B, 96 days after maximum light.  Additional photometry:  SN2002aj, 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.  Visualmagnitude 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 CBAT2002 January 24                (7804)            Daniel W. E. Green

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