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IAUC 7640: 2001cj; NO 2001bn; 29P; 2001V

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                                                  Circular No. 7640
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)

SUPERNOVA 2001cj IN UGC 8399
     M. Ganeshalingam and W. D. Li, University of California at
Berkeley, report the discovery by LOTOSS (cf. IAUC 7514) of an
apparent supernova in unfiltered images taken with the Katzman
Automatic Imaging Telescope (KAIT) on May 30.3 (mag about 15.9) and
31.3 UT (mag about 15.7).  The new object is located at R.A. =
13h21m44s.85, Decl. = +31o14'48".6 (equinox 2000.0), which is 7".6
west and 35".2 north of the nucleus of UGC 8399.  A KAIT image of
the same field taken on May 17.3 showed nothing at this position
(limiting mag about 18.5).
     L. Wang, Lawrence Berkeley National Laboratory, writes:  "SN
2001cj was observed using the Kitt Peak 2.1-m telescope (+ GCAM) on
June 1.  A fully reduced spectrum shows that it is of type Ia and
is before optical maximum.  The blueshift of the asbsorption trough
of the P-Cyg profile of the Si II 635.5-nm line is at 10 580 km/s
after being corrected for the redshift of the host galaxy."

     M. Phillips, Carnegie Observatories; and K. Krisciunas, Cerro
Tololo Interamerican Observatory, report that a spectrum obtained
with the Du Pont 2.5-m telescope at Las Campanas Observatory on May
27.17 UT shows that SN 2001bn (cf. IAUC 7624) is not a supernova,
but rather a blue variable star with strong, narrow H I Balmer
absorption lines at z about 0.0.

     This comet is undergoing another outburst, as shown by the
following total magnitudes (CCD unless otherwise indicated):  Apr.
22.80 UT, 15.5 (A. Nakamura, Kuma, Ehime, Japan, 0.60-m reflector);
28.44, 15.7 (A. Hale, Cloudcroft, NM, 0.2-m reflector); May 17.69,
13.2 (K. Kadota, Ageo, Saitama, Japan, 0.18-m reflector); 18.71,
13.4 (Kadota); 19.73, 12.0 (K. Yoshimoto, Hirao, Yamaguchi, Japan,
0.25-m reflector; visual); 27.77, 13.5 (Nakamura).

     CCD R magnitudes by K. Hornoch, Lelekovice, Czech Republic
(0.35-m reflector):  Apr. 24.951 UT, 15.8; 27.908, 15.9; 29.879,
15.9; May 9.845, 15.9; 10.863, 16.0; 11.956, 16.0; 13.927, 16.1;
20.900, 16.2; 24.917, 16.3.

                      (C) Copyright 2001 CBAT
2001 June 1                    (7640)            Daniel W. E. Green

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