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IAUC 7736: 2001ez; 2001ev; 2001ex; 2001ey

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IAUC number 

                                                  Circular No. 7736
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 2001ez IN PGC 17642
     D. J. Hutchings and W. D. Li, University of California at
Berkeley (UCB), report the discovery by LOTOSS (cf. IAUC 7514) of
an apparent supernova in unfiltered images taken with the Katzman
Automatic Imaging Telescope on Oct. 17.5 (mag about 17.8) and 18.5
UT (mag about 17.6).  SN 2001ez is located at R.A. = 5h42m37s.64,
Decl. = +69o14'14".6 (equinox 2000.0), which is 3".3 east and 2".0
north of the nucleus of PGC 17642.  A KAIT image taken on Oct. 2.5
shows nothing at this position (limiting mag about 19.5).


SUPERNOVA 2001ev IN UGC 2653
     T. Matheson, S. Jha, P. Challis, and R. Kirshner, Harvard-
Smithsonian Center for Astrophysics, report that a spectrum (range
370-750 nm) of SN 2001ev (cf. IAUC 7732), obtained by M. Calkins on
Oct. 17.39 UT with the F. L. Whipple Observatory 1.5-m telescope (+
FAST spectrograph), shows it to be a type-II supernova.  Adopting
the NASA/IPAC Extragalactic Database (NED) recession velocity of
6939 km/s for the host galaxy, the expansion velocity derived from
the minimum of the H-alpha line is 11 800 km/s.


SUPERNOVA 2001ex IN UGC 3595
     Matheson et al. also report that a spectrum of SN 2001ex (cf.
IAUC 7735), obtained by M. Calkins as above on Oct. 18.50 UT, shows
it to be a type-Ia supernova near maximum light.  Adopting the NED
recession velocity of 7908 km/s for the host galaxy, the supernova
expansion velocity is about 9800 km/s for Si II (rest 635.5 nm).


SUPERNOVA 2001ey IN MCG -01-57-10
     Matheson et al. add that a spectrum (range 370-750 nm) of SN
2001ey (cf. IAUC 7735), obtained by M. Calkins as above on Oct.
18.08 UT, shows it to be a type-IIn supernova.  Strong hydrogen
Balmer emission lines are superposed on a nearly featureless
continuum.
     W. M. Wood-Vasey, UCB and Lawrence Berkeley National
Laboratory, reports that observations at the location of 2001ey
taken with the Oschin 1.22-m Schmidt telescope at Palomar on Oct.
5.13 UT show nothing to a limiting unfiltered magnitude of 19.2.

                      (C) Copyright 2001 CBAT
2001 October 18                (7736)            Daniel W. E. Green

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