[IAUC] CBET 451: 20060328 : SUPERNOVA 2006bc IN NGC 2397

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                                                  Electronic Telegram No. 451
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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SUPERNOVA 2006bc IN NGC 2397
     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 Swift
Ultraviolet/Optical Telescope (UVOT) observations of SN 2006bc (cf.
CBET 446, IAUC 8693) obtained on Mar. 27.93 UT.  A new object is
detected at R.A. = 7h21m16s.50, Decl. = -68o59'57".3 (equinox
2000.0) as compared to Digitized Sky Survey images, consistent
with the position reported by Martin on CBET 446, with UVOT
magnitudes B = 17.6, U = 16.7, UVW1 [181-321 nm] = 17.4, and UVW2
[112-264 nm] = 18.0.  Statistical and systematic errors are 0.1 mag
each.  Comparing the U-B color with other supernovae from Poznanski
et al. (2002, PASP 114, 833) shows that 2006bc is approximately one
magnitude bluer than was observed in the displayed supernovae.  The
similarity of the colors with the type-II-P supernova 2005cs (Brown
et al., in preparation) and the type-II SN 2006at (Brown and Immler,
http://www.astronomerstelegram.org/?read=771) at similar epochs
indicate that SN 2006bc is a type-II supernova.  Further Swift
observations are scheduled.
     Editor's note:  the offset of 2006bc from the center of NGC
2397 as given on IAUC 8693 is a correction by Immler to that given
by Martin on CBET 446.


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                         (C) Copyright 2006 CBAT
2006 March 28                    (CBET 451)               Daniel W. E. Green