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IAUC 7967: 2002ez, 2002fa,, 2002fb; 2002et

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                                                  Circular No. 7967
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

SUPERNOVAE 2002ez, 2002fa, AND 2002fb
     Three new supernovae have been discovered on unfiltered CCD
images, as listed below.  SNe 2002ez and 2002fa were reported by
W. M. Wood-Vasey et al. (cf. IAUC 7964, to which should be added B.
Farris) on NEAT images obtained at Palomar, while SN 2002fb was
found by LOTOSS (cf. IAUC 7906) on KAIT images and reported by D.
Weisz and W. D. Li.

SN       2002 UT          R.A. (2000.0) Decl.   Mag.   Offset
2002ez   July 23.28   22 00 20.93  -14 00 22.5  17.6   4" E, 18" S
2002fa   Aug. 24.34   20 52 21.78  + 2 08 41.9  19.4   4".1 E
2002fb   Sept. 6.4     1 57 48.90  +36 20 26.3  17.1:  17".5 W, 9".1 S

Additional magnitude estimates from the same respective
observatories for each object:  SN 2002ez, 2001 Sept. 6 UT, [20.5;
Nov. 27, [20.5; 2002 July 23.40, 17.6; 29, 18.5; Aug. 8, 18.4; 20,
18.9; 26, 19.3.  SN 2002fa, July 1, [20.5; 20, [20.5; Aug. 3,
[20.5; Aug. 24.39, 19.4; Sept. 1, 19.3.  SN 2002fb in NGC 759, Aug.
31.4, [19.0:; Sept. 7.4, 16.9: (1-m Nickel telescope).
     T. Matheson, P. Challis, and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum (range 370-750 nm)
of SN 2002fb, obtained by M. Calkins on Sept. 7.50 UT with the Mt.
Hopkins 1.5-m telescope (+ FAST spectrograph), shows it to be a
possibly peculiar type-Ia supernova near maximum.  Several titanium
features appear stronger than normal, implying that this may be a
subluminous type-Ia event similar to SN 1991bg or SN 1999by.
Adopting the NASA/IPAC Extragalactic Database recession velocity of
4667 km/s for the host galaxy, the supernova expansion velocity is
about 11600 km/s for Si II (rest 635.5 nm).  The spectral-feature
age of the supernova is 2 +/- 2 days before maximum light.

SUPERNOVA 2002et IN MCG -04-47-10
     A. Clocchiatti and P. Lagos, Pontificia Universidad Catolica
de Chile; and S. Benetti, A. Pastorello, and M. Riello,
Osservatorio Astronomico di Padova, report that a spectrum (range
346-958 nm, resolution 0.5 nm) obtained on Aug. 31.10 UT with the
European Southern Observatory 3.6-m telescope (+ EFOSC2) indicates
that SN 2002et (cf. IAUC 7959) is a type-Ia supernova.  The best
match is obtained with a spectrum of SN 1989B, approximately 10
days after maximum light.  The redshift of the parent galaxy
(measured from weak stellar Na D lines in the parent galaxy at
605.4 nm and H-alpha in emission at 673.7 nm) is 0.0273.

                      (C) Copyright 2002 CBAT
2002 September 7               (7967)            Daniel W. E. Green

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