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IAUC 8106: 2003cy, 2003cz; 2003bv, 2003cq; C/2002 W6, C/2002 W7

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IAUC number

                                                  Circular No. 8106
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 2003cy AND 2003cz
     Further to IAUC 8105, W. M. Wood-Vasey, G. Aldering, P. Nugent,
and S. Brar report the discovery of two apparent supernovae:

SN      2003 UT      R.A.  (2000.0)  Decl.    Mag.      Offset
2003cy  Mar. 30.14  10 46 04.27  +27 20 57.2  19.0   4".4 E, 3".3 S
2003cz  Apr.  2.14  12 05 53.57  +33 27 13.0  20.2   6".8 E, 1".2 N

Additional magnitudes:  SN 2003cy, Mar. 22.14, [21.1; Apr. 2.14,
18.5.  SN 2003cz, 2002 Apr. 9.14, [21.4; 20.14, [21.0; 2003 Mar.
21.46, 19.8.

SUPERNOVAE 2003bv AND 2003cq
     Further to IAUC 8105, T. Matheson, P. Challis, and R. Kirshner
report that a spectrum of SN 2003cq (cf. IAUC 8103), obtained by M.
Calkins on Apr. 3.28 UT with the 1.5-m telescope, shows it to be a
type-Ia supernova about a week before maximum.  Adopting the NASA/
IPAC Extragalactic Database recession velocity of 9978 km/s for the
host galaxy, the supernova expansion velocity is 13200 km/s for Si
II (rest 635.5 nm).  The spectral-feature age of the supernova is 7
+/- 2 days before maximum light.  A spectrum (range 370-750 nm) of
SN 2003bv (cf. IAUC 8093), obtained by L. Macri on Mar. 25.17,
shows it to be a type-II supernova.  The spectrum consists of a
blue continuum, with broad hydrogen emission lines.  The absorption
component of a P-Cyg profile is not evident, but cannot be excluded
due to the poor signal-to-noise ratio of the spectrum.

COMETS C/2002 W6 AND C/2002 W7 (SOHO)
     Further to IAUC 8103, D. Hammer provides measurements for two
additional Kreutz sungrazing comets found on SOHO C2 website images
by R. Matson (C/2002 W6) and D. Evans (C/2002 W7).  C/2002 W7 was
also visible in the C3 coronagraph.  Reduced astrometry and orbital
elements by B. G. Marsden appear on MPEC 2003-G07.

    Comet         2002 UT           R.A. (2000) Decl.
    C/2002 W6     Nov. 20.351      15 40.9   -21 17
    C/2002 W7          21.821      15 49.0   -22 29

                      (C) Copyright 2003 CBAT
2003 April 3                   (8106)            Daniel W. E. Green

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