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IAUC 7547: 2000fo; 2000fm, 2000fn,, 2000ew; RZ Leo

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IAUC number 

                                                  Circular No. 7547
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)


SUPERNOVA 2000fo IN PGC 70148
     M. Schwartz, Cottage Grove, OR, reports the discovery by
LOTOSS (cf. IAUC 7514) of an apparent supernova (mag about 16.5) on
unfiltered images taken with the 0.5-m Tenagra III automatic
telescope on Dec. 21.1 and 22.0 UT.  The new object is located at
R.A. = 22h58m25s.34, Decl. = +26o38'26".6 (equinox 2000.0), which
is 5".5 west and 5".8 north of the nucleus of PGC 70148.  An image
of the same field taken with the Katzman Automatic Imaging
Telescope (cf. IAUC 6627, 7126) under poor conditions on Dec. 13.1
already showed a hint of SN 2000fo, while an image of the field
taken with the 0.5-m Tenagra III automatic telescope on Dec. 6.1
showed nothing at this position (limiting mag about 19.0).


SUPERNOVAE 2000fm, 2000fn, AND 2000ew
     A. V. Filippenko, R. Chornock, and M. Modjaz, University of
California at Berkeley, report that inspection of uncalibrated CCD
spectra (range 330-1000 nm) of SN 2000fn (IAUC 7546) obtained on
Dec. 21 UT with the Shane 3-m reflector at Lick Observatory reveals
that the object is a type-Ib supernova about 1 month past maximum
brightness.  Lower-quality spectra reveal that SN 2000fm (IAUC
7545) is probably a very young type-II supernova; relatively weak
H-alpha emission is visible on a blue, featureless continuum.
High-quality spectra of SN 2000ew (IAUC 7530) indicate that it is
actually of type Ic (not type Ia, as stated on IAUC 7532).


RZ LEONIS
     J. A. Mattei, American Association of Variable Star Observers,
reports that this WZ Sge-type cataclysmic variable is having a
bright outburst (possibly a superoutburst), as indicated by the
following visual magnitude estimates (S = R. Stubbings, Drouin,
Victoria, Australia; D = P. Dubovsky, Podbiel, Slovakia):  Dec.
4.404 UT, [14.0 (S); 7.165, [14.0 (D); 9.729, [12.0 (S); 20.662,
12.1 (S); 20.700, 12.1 (S); 20.720, 12.2 (S).  High-speed
photoelectric or CCD photometry to search for superhumps is
strongly recommended.  The most recent outburst recorded in the
AAVSO International Database was in 1990, when the star was in
outburst for at least 5 days between Oct. 26 and 31, reaching
visual mag 12.8.

                      (C) Copyright 2000 CBAT
2000 December 22               (7547)            Daniel W. E. Green

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