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IAUC 7398: 2000bi; 2000bj; 1999gi

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                                                  Circular No. 7398
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 617-495-7244/7440/7444 (for emergency use only)

     M. M. M. Santangelo, Lucca, Italy, reports his discovery with
the Monte Agliale 0.51-m reflector, in the course of the Monte
Agliale Supernovae Search, of an apparent supernova in a member
galaxy of the Abell 576 cluster.  SN 2000bi was found at R about
18.4 on three unfiltered frames taken on Mar. 22.90 UT, and
confirmed on ten frames taken on Apr. 7.92 (R about 19.2) and 8.85
(R about 19.2); the limiting magnitude of all these frames is R
about 20.0.  The new object is located at R.A. = 7h21m33s.46, Decl. =
+55o45'30".9 (equinox 2000.0), which is about 12" east and 4" north
of the host galaxy nucleus.  Inspection of first and second Palomar
Sky Survey images and of the Palomar Quick-V survey, as well as a
frame taken with the 1.52-m reflector of the Loiano Observatory
some years ago, reveals nothing at the position of SN 2000bi.

     D. Kirkman, Bell Laboratories (BL); I. Dell'Antonio and R. A.
Schommer, National Optical Astronomy Observatory; G. Squires,
California Institute of Technology; and J. A. Tyson, BL, of the
Deep Lens Survey (see http://dls.bell-labs.com) team, with support
from D. Wittman (BL), A. Becker and C. Stubbs (University of
Washington), and G. Bernstein (University of Michigan), report the
discovery of a possible supernova (V about 24.3) on CCD 600-s V
frames taken with the Cerro Tololo 4-m telescope (+ Mosaic II
camera) on Apr. 5.039 UT.  SN 2000bj is located at R.A. =
10h51m27s.24, Decl. = -5 08'29".6 (equinox 2000.0), which is about
0".9 north of the centroid of a faint galaxy.  SN 2000bj was also
present on subsequent B-, R-, and z-band frames taken on the same
night, and in V-band images taken on Apr. 2 (when it was 0.2 mag
fainter), but it is not visible on images taken with the same
telescope on Mar. 8 (V > 24.7).  The low-surface-brightness host
galaxy (V about 24.5), visible in some of the images, is probably a
spiral or irregular galaxy.  Details and finding charts are posted
at http://www.astro.washington.edu/becker/deeplens/trans4.html.

SUPERNOVA 1999gi IN NGC 3184
     Unfiltered CCD magnitudes:  Mar. 13.76 UT, 14.9 +/- 0.1 (K.
Sarneczky, K. Sziladi, and L. Kiss, Piszkesteto station, Konkoly
Observatory); 28.874, 14.9 (K. Hornoch, Lelekovice, Czech
Republic); Apr. 2.908, 15.0 (Hornoch); 8.815, 15.3 (Hornoch);
9.816, 15.3 (Hornoch).

                      (C) Copyright 2000 CBAT
2000 April 10                  (7398)            Daniel W. E. Green

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