[IAUC] CBET 476: 20060414 : SUPERNOVA 2006bp IN NGC 3953

[IAUC mailing list]

                                                  Electronic Telegram No. 476
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html


SUPERNOVA 2006bp IN NGC 3953
     S. Immler, Goddard Space Flight Center, NASA, and Universities
Space Research Association; and P. J. Brown, Pennsylvania State
University, on behalf of the Swift-satellite team, report on the
detection of x-ray emission from the type-II supernova 2006bp with
the Swift X-Ray Telescope (XRT) obtained between Apr. 10.54 and 14.33
UT.  An x-ray source is detected in the merged 17700-s XRT data at a
4.1-sigma level at R.A. = 11h53m55s.68, Decl. = +52o21'06".9 (equinox
2000), consistent with the reported optical and ultraviolet positions
(CBET 470; IAUC 8700; http://www.astronomerstelegram.org/?read=793).
The XRT net count rate of (1.3 +/- 0.3) x 10**-3 counts/s corresponds
to a 0.2- to 10-keV x-ray flux of (6.8 +/- 1.6) x 10**-14 ergs/cm/cm/s
and a luminosity of (1.8 +/- 0.4) x 10**39 ergs/s for an adopted
thermal plasma spectrum with a temperature of kT = 10 keV, a Galactic
foreground column density of 1.58 x 10**20 cm**-2 (Dickey and Lockman
1990, ARAA 28, 215), and a distance of 14.9 Mpc.  Further Swift
observations are scheduled, and observations in other wavelength
regimes are encouraged.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2006 CBAT
2006 April 14                    (CBET 476)               Daniel W. E. Green