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IAUC 7845: 2002bl; 2002bm

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                                                  Circular No. 7845
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)


SUPERNOVA 2002bl IN UGC 5499
     M. Armstrong, Rolvenden, England, reports his discovery of an
apparent supernova (mag 17.0) on an unfiltered CCD images taken on
Mar. 2.901, 5.879, and 7.059 in the course of the U.K. Nova/
Supernova Patrol.  The new object is located at R.A. = 10h12m17s.28,
Decl. = +27o51'52".4 (equinox 2000.0), which is approximately 5"
west and 9" north of UGC 5499.  SN 2002bl is not present on
Armstrong's images from 2000 Dec. 22 (limiting mag 19.5) or 2002
Feb. 14 and Jan. 15, neither is it present on Palomar Sky Survey
images taken on 1990 Jan. 1 (red, limiting mag 20.8) and 1993 Mar.
13 (blue, limiting mag 22.5).
     A. V. Filippenko, University of California, Berkeley; D. C.
Leonard, University of Massachusetts, Amherst; and E. C. Moran,
Wesleyan University, write:  "Inspection of a CCD spectrum (range
390-880 nm), obtained on Mar. 7 UT with the Keck-I telescope,
reveals that the object is very similar to the peculiar type-Ic
supernovae ('hypernovae') 1997ef, 1998bw, and 2002ap, about 2 weeks
after the explosion (Iwamoto et al. 2000, Ap.J. 534, 660, Fig. 1;
see also IAUC 7825).  The relative strength of the broad 535- and
645-nm emission features resembles that of SNe 1997ef and 2002ap
more than that of SN 1998bw at any published phase (Patat et al.
2001, Ap.J. 555, 900, Fig. 2).  On the other hand, the absorption
trough nominally associated with the Ca II triplet is very weak,
more closely resembling that of SN 1998bw than that of SNe 1997ef
and 2002ap.  The approximate expansion velocity derived from the
broad, flat minimum of the O I 777.4-nm absorption trough is 17 000
km/s.  The object is polarized at an average level of 0.4 percent;
preliminary analysis suggests the presence of slight undulations
that are correlated with features in the total flux spectrum."


SUPERNOVA 2002bm IN MCG -01-32-19
     T. Puckett, Mountain Town, GA; and A. Sehgal, Woodinville, WA,
report the discovery of an apparent supernova (mag 17.0) on an
unfiltered CCD frame taken with the Puckett Observatory 0.35-m
automated supernova patrol telescope on Mar. 6.24 UT.  SN 2002bm is
located at R.A. = 12h30m16s.90, Decl. = -8 23'34".8 (equinox
2000.0), which is 11".4 east and 15".0 north of the center of MCG
-01-32-19.  The new object was confirmed on CCD frames taken on
Mar. 7.33, but it is not present on images taken by Puckett on 2000
Nov. 30, Dec. 8, 2001 May 23, 2002 Jan. 16 (limiting mag about 20.0)
or on Palomar Sky Survey images taken on 1993 Jan. 24 (limiting mag
about 21.0) and 1984 Apr. 4 (limiting mag about 20.0).

                      (C) Copyright 2002 CBAT
2002 March 7                   (7845)            Daniel W. E. Green

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