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IAUC 7347: 2000B; PSR 0833-45; 1999gh, 1999gk, 1999gm, 1999gn, 1999gq

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IAUC number

                                                  Circular No. 7347
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)

     P. Antonini, Avignon, France; and F. Colas and E. Frappa, Pic
du Midi Observatory, report the discovery of an apparent supernova
(mag 16.5) on CCD images taken with the Bedouin Observatory 0.305-m
telescope by Antonini on Jan. 11.0 UT.  SN 2000B is located at R.A.
= 7h05m40s.73, Decl. = +50o35'10".5 (equinox), which is 14" west and
19" north of the nucleus of NGC 2320.  SN 2000B was confirmed (mag
16.0) via CCD observation on Jan. 13.85 with the 1.05-m telescope
at Pic du Midi.  The new star does not appear on the Digital Sky
Survey (limiting mag about 21) or the Buil-Thouvenot Atlas.
Additional photometry of SN 2000B by Colas and Frappa:  Jan. 14.03,
R = 16.35; 14.80, B = 16.59 +/- 0.04; 14.84, V = 16.49 +/- 0.02;
14.89, R = 16.26 +/- 0.02; 14.94, I = 16.41 +/- 0.04; 16.84, V =
16.19; 16.92, R = 16.01; 16.97, I = 16.27; 17.01, R = 16.36.  W. Li,
University of California, reports that a prediscovery KAIT CCD
image taken on Jan. 8.3  shows the new object at mag about 17.5.

PSR 0833-45
     R. G. Dodson, P. M. McCulloch, and M. E. Costa, University of
Tasmania, write:  "We observed a sharp glitch on Jan. 16.319 UT in
the Vela pulsar. Preliminary model fitting gives a fractional
decrease of 3.14 x 10**-6 in the period, making this the largest
decrease on record.  The jump was observed at three frequencies
(635.034, 990.25, and 1390.64 MHz) with the Mount Pleasant 14-m
dish, and further observations were made with the 26-m dish.
Details (including temporary parameter files over the glitch and
for pre- and post-glitch) can be found at

SUPERNOVAE 1999gh, 1999gk, 1999gm, 1999gn, 1999gq
     Unfiltered CCD magnitude estimates by L. Kiss, K. Sarneczky,
and K. Sziladi, at the Piszkesteto station of Konkoly Observatory:
SN 1999gh in NGC 2986, Jan. 1.020 UT, 16.7 +/- 0.3;
SN 1999gk in NGC 4653, Jan. 1.181, 16.5 +/- 0.2;
SN 1999gm in PGC 24106, Jan. 1.039, 18.5 +/- 0.3;
SN 1999gn in M61, Jan. 1.171, 16.0 +/- 0.1;
SN 1999gq in NGC 4523, Jan. 1.177, 14.5 +/- 0.1.

                      (C) Copyright 2000 CBAT
2000 January 17                (7347)            Daniel W. E. Green

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