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IAUC 8009: 2002hm; 2002hn

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                                                  Circular No. 8009
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 2002hm IN NGC 4016
     T. Boles, Coddenham, England, reports the discovery of an
apparent supernova (mag 16.9) on an unfiltered CCD image taken on
Nov. 5.158 UT in the course of the U.K. Nova/Supernova Patrol.  The
new object is located at R.A. = 11h58m29s.58, Decl. = +27o31'45".1
(equinox 2000.0), which is approximately 6".8 east and 1".0 north
of the center of NGC 4016.  SN 2002hm is not present on Boles'
images from Apr. 4 (limiting mag 18.5), 19, or June 1, and it is
not present on Palomar Sky Survey red and blue plates.
     G. Pignata and F. Patat, European Southern Observatory; and S.
Benetti, Istituto Nazionale di Astrofisica, Padua, on behalf of the
European RTN (cf. IAUC 7961, 7987), report that full reduction of a
spectrum (range 380-880 nm; resolution 1.1 nm) of SN 2002hm,
obtained at Calar Alto on Nov. 6.19 UT with the 2.2-m reflector (+
CAFOS), shows it to be a type-II supernova similar to SN 1992H
(Clocchiatti et al. 1996, A.J. 111, 1286), about 1 month past
maximum.  The spectrum is dominated by hydrogen lines of the Balmer
series, Ca II, and Fe II, accompanied by well-developed P-Cyg
profiles, overimposed on a rather blue continuum.  The photospheric
expansion velocities deduced from the minima of absorption throughs
of H-alpha and H-beta are 9400 and 8000 km/s, respectively.  The
recession velocity at the supernova position, deduced from the
narrow H-alpha line from the underlying H II region, is 3560 km/s.


SUPERNOVA 2002hn IN NGC 2532
     D. Hutchings and W. Li, University of California, Berkeley
(UCB), report the LOTOSS (cf. IAUC 7906) discovery of an apparent
supernova (mag about 16.8) on unfiltered KAIT images taken on Nov.
5.5 and 6.5 UT.  SN 2002hn is located at R.A. = 8h10m14s.95, Decl.
= +33o57'19".4 (equinox 2000.0), which is 0".5 west and 4".6 south
of the nucleus of NGC 2532.  A KAIT image taken on Oct. 30.5 showed
the new object at mag 17.3, while an image on Oct. 21.5 showed
nothing at this position (limiting mag about 19.0).  SN 1999gb also
occurred in NGC 2532.  R. Foley, Li, and A. V. Filippenko, UCB,
report that inspection of a CCD spectrum (range 310-1000 nm),
obtained on Nov. 6 UT with the Shane 3-m reflector at Lick
Observatory, reveals that SN 2002hn is of type Ic, within one week
of maximum brightness.

                      (C) Copyright 2002 CBAT
2002 November 6                (8009)            Daniel W. E. Green

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