Central Bureau for Astronomical Telegrams

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IAUC 7371: 2000K; 1999cm

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                                                  Circular No. 7371
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)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)


SUPERNOVA 2000K IN MCG +9-19-191
     Independent discoveries of a supernova in MCG +9-19-191 have
been reported as a result of unfiltered CCD images taken by Paolo
Sala, Munich, on Feb. 28.07 UT (mag about 16.6; instrument not
specified) and by T. Puckett, Mountain Town, GA, and D. George,
Ottawa, ON, on Feb. 28.36 (mag 18.1) with the Puckett Observatory
0.35-m automated supernova patrol telescope (limiting mag 19.5).
Sala provides the position of SN 2000K as R.A. = 11h47m49s.76,
Decl. = +56o01'00".1 (equinox 2000.0), which is about 15" east-
southeast of the host galaxy, noting that this location is about
200" north-northeast of NGC 3888.  Puckett gives the position end
figures for the supernova as 49s.99, 01".4, or 15".2 east and 5".6
south of the center of MCG +9-19-191.  Sala notes that the new star
is absent on a comparison image of the galaxy obtained on 1998 Apr.
22.  Puckett reports that SN 2000K was also present on an
unfiltered CCD frame taken on 2000 Feb. 29.08, but it was not
present on a frame taken on Feb. 9.28, and it does not appear on
Palomar Sky Survey images taken on 1993 Apr. 25 (limiting mag about
21.0) or 1950 Mar. 21 (limiting mag about 20.0).
     S. Jha, P. Challis, and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics, report that images of SN 2000K, taken on
Feb. 29.4 UT by P. Barmby with the F. L. Whipple Observatory (FLWO)
1.2-m telescope (+ 4shooter), yield the following precise position
for SN 2000K:  R.A. = 11h47m50s.08, Decl. = +56o01'01".3 (equinox
2000.0), which is 15".5 east and 4".8 south of the host galaxy.
They add: "Concurrent spectra of SN 2000K, taken by P. Berlind with
the FLWO 1.5-m telescope (+ FAST spectrograph), show it to be a
type-Ia supernova after maximum light.  The age of the supernova,
based on its spectral features (Riess et al. 1997, A.J. 114, 722)
is 13 +/- 3 days past maximum light.  If we adopt a Si II (rest
635.5 nm) expansion velocity of 10 000 km/s, typical of type-Ia
supernovae at this epoch (Jha et al. 1999, Ap.J. Supp. 125, 73),
the observed Si II feature implies a redshift of 16 000 km/s for
the host galaxy."


SUPERNOVA 1999cm IN UGC 9766
      Corrigendum.  On IAUC 7190, line 5, for  1".0 east  read
7".5 east

                      (C) Copyright 2000 CBAT
2000 February 29               (7371)            Daniel W. E. Green

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