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IAUC 7615: 2001bc, 2001bd, 2001be; 2001az

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                                                  Circular No. 7615
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 2001bc, 2001bd, 2001be
     E. Cappellaro, G. Altavilla, S. Benetti, A. Pastorello, and M.
Turatto, Osservatorio di Padova; A. Clocchiatti, Pontificia
Universidad Catolica de Chile; I. J. Danziger and P. Mazzali,
Osservatorio di Trieste; and F. Patat, European Southern
Observatory (ESO), report the discovery of three new supernovae on
CCD frames taken during a search performed with the ESO/MPI 2.2-m
telescope (+ Wide Field Imager).  The supernovae were identified by
subtracting reference images taken with the same equipment during
1999.

SN       2000 UT       R.A. (2000.0) Decl.       V         z   Type
2001bc   Apr. 20.7    9 46 07.06  -21 11 28.6   23.4 B   0.195  II
2001bd   Apr. 19.3   19 13 10.97  -64 17 07.0   22.6 V   0.096  II
2001be   Apr. 20.2    9 52 51.21  -20 34 00.0   21.1 V   0.241  Ia

SN 2001bc and SN 2001be are each within 1" of the nucleus of its
parent galaxy.  SN 2001bd lies 3".1 west and 1".8 south of its
galaxy's nucleus.  Each object's classification and redshift were
derived from spectra obtained on Apr. 28 with the European Southern
Observatory 8.2-m ANTU Very Large Telescope (+ FORS1).


SUPERNOVA 2001az IN UGC 10483
     T. Matheson, S. Jha, P. Challis, and R. Kirshner, Harvard-
Smithsonian Center for Astrophysics, report that a spectrum of SN
2001az (cf. IAUC 7614), obtained by P. Berlind on Apr. 30.39 UT
with the F. L. Whipple Observatory 1.5-m telescope (+ FAST
spectrograph), shows it to be a type-Ia supernova before maximum
light.  Narrow H-alpha emission from a separate exposure of the
nucleus of UGC 10483 yields a recession velocity of 12 200 km/s for
the host galaxy.  Using this value, the expansion velocity of the
supernova is about 12 400 km/s for Si II (rest 635.5 nm).  The
spectral-feature age of the supernova (Riess et al. 1997, A.J. 114,
722) is 4 +/- 2 days before maximum light.
     R. Chornock, M. Modjaz, and A. V. Filippenko, University of
California at Berkeley, report that inspection of a CCD spectrum
(range 320-1000 nm), obtained on Apr. 30 UT with the Shane 3-m
reflector at Lick Observatory, reveals that SN 2001az is of type
Ia, within one week of maximum brightness.

                      (C) Copyright 2001 CBAT
2001 May 1                     (7615)            Daniel W. E. Green

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