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IAUC 7374: 2000N; 2000M

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                                                  Circular No. 7374
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 2000N IN MCG -02-34-054
     Y. Sato and W. D. Li, University of California at Berkeley, on
behalf of the Lick Observatory Supernova Search (cf. IAUC 6627,
7126), report the discovery of an apparent supernova (mag about
17.3) on an unfiltered image taken on Mar. 4.4 UT with the 0.8-m
Katzman Automatic Imaging Telescope (KAIT).  SN 2000N is located at
R.A. = 13h27m56s.19, Decl. = -13o24'48".3 (equinox 2000.0), which
is 9".2 east and 34".1 north of the nucleus of MCG -02-34-054.  SN
2000N was confirmed at about the same magnitude on an unfiltered
image taken by T. Puckett with the Puckett Observatory 0.60-m
automated supernova patrol telescope on Mar. 5.2.  An unfiltered
KAIT image taken on 1999 Dec. 25.5 showed nothing at the position
of the new object (limiting mag about 19.0).


SUPERNOVA 2000M IN NGC 6389
     S. Jha, P. Challis, and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum of SN 2000M (cf.
IAUC 7373), taken by M. Calkins on Mar. 2.5 UT with the F. L.
Whipple Observatory 1.5-m telescope (+ FAST spectrograph), reveals
it to be a type-II supernova after maximum light.  The spectrum
exhibits a slightly red continuum with well-developed lines,
including Fe II, Na I, and P-Cyg H-alpha.  Emission lines from the
host galaxy yield a recession velocity of 3160 +/- 20 km/s.  The
supernova expansion velocity, measured using the H-alpha line
profile, is 5600 km/s.
     E. Cappellaro, M. Turatto, S. Benetti, and A. Pastorello,
Padua, observed SN 2000M with the European Southern Observatory
3.6-m reflector (+ EF2) on Mar. 3.4 UT.  Preliminary reduction of
the spectrum (range 350-750 nm, resolution 15 nm) shows strong
lines with P-Cyg profiles over a red continuum.  The spectrum
resembles that of a type-II supernova, about 1 month past maximum,
with strong lines of H I, Na I D, Ba II, Sc II, and Fe I.  The
photospheric expansion velocity, determined from the minimum of the
H-alpha absorption, is about 6000 km/s.  The red continuum seems
intrinsic and also due to foreground extinction in the Galaxy and
in the parent galaxy.  In fact, a relatively strong absorption
feature is visible at 595 nm, corresponding to the Na I D doublet
at the parent-galaxy redshift.

                      (C) Copyright 2000 CBAT
2000 March 5                   (7374)            Daniel W. E. Green

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