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IAUC 7964: 2002ev, 2002ew, 2002ex, 2002ey; 2002em, 2002ep

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                                                  Circular No. 7964
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 2002ev, 2002ew, 2002ex, 2002ey
     Four new supernovae have been discovered on unfiltered CCD
images, as listed below.  SN 2002ey was found on LOTOSS KAIT images
(cf. IAUC 7906) by D. Hutchings and W. D. Li, and the other three
were found by W. M. Wood-Vasey et al. (cf. IAUC 7916) on Palomar
NEAT images.

SN       2002 UT          R.A. (2000.0) Decl.   Mag.   Offset
2002ev   Aug. 24.26   20 23 00.85  - 1 48 14.6  18.8   8" E, 7" S
2002ew   Aug. 24.34   20 54 30.50  - 0 08 26.0  17.8   4" S
2002ex   Aug. 19.28   22 09 00.79  -10 36 25.8  19.5   1".5 N
2002ey   Sept. 3.3    23 10 12.33  + 7 32 59.9  17.7:  5".8 E, 5".5 N

Additional magnitude estimates with the same instrumentation for
each respective object:  SN 2002ev, June 8 UT, [20.5; July 20,
[20.5; Aug. 4, [20.5; 15, 20.0-20.5 (hint); 24.31, 18.8; 25, 19.1;
31, 18.7; Sept. 3, 18.7.  SN 2002ew, June 10, [19.5; Aug. 4, [19.5;
24.40, 17.8; 25, 17.7.  SN 2002ex, July 22, [20.5; Aug. 8, [20.5;
17, 20.0-20.5 (hint); 19.40, 19.5; 28, 18.7.  SN 2002ey, Aug. 17.3,
[19.0:; Sept. 4.3, 17.7:.
     R. Chornock, W. D. Li, and A. V. Filippenko, University of
California at Berkeley (UCB), report that CCD spectra (range
310-1000 nm), obtained on Sept. 4 UT with the Shane 3-m reflector
at Lick Observatory, reveal that SN 2002ey is a type-Ia supernova
resembling the peculiar subluminous object SN 1991bg (e.g.,
Filippenko et al. 1992, A.J. 104, 1543).  SN 2002ew is a young
type-II supernova.  The object has a mostly featureless blue
continuum with narrow (unresolved, perhaps from an H II region)
H-alpha emission present at a redshift of 8920 km/s.  There is a
very weak, low-contrast, broader component of H-alpha emission, as
well.  SN 2002ev is also of type II, with a strong H-alpha line
exhibiting a P-Cyg profile.  SN 2002ex is a type-Ic supernova about
a week past maximum brightness.  Strong emission lines from a
superposed H II region yield a redshift of 11310 km/s.


SUPERNOVAE 2002em AND 2002ep
     Chornock, B. Swift (also at UCB), Filippenko, and Li add that
inspection of CCD spectra, obtained as above at Lick on Sept. 3,
reveal that SN 2002ep (IAUC 7959) is of type Ia, about 1 month past
maximum brightness.  SN 2002em (IAUC 7955) is a type-II supernova,
but its spectrum consists mostly of a smooth continuum with a
relatively narrow (FWHM about 1500 km/s) H-alpha emission feature.

                      (C) Copyright 2002 CBAT
2002 September 4               (7964)            Daniel W. E. Green

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