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Swift Observations of SN 2006bp in NGC 3953

ATel #793; S. Immler, Goddard Space Flight Center, NASA, and Universities Space Research Association; P. J. Brown, Pennsylvania State University, and P. Milne (Steward Observatory, University of Arizona) on behalf of the Swift-satellite team
on 10 Apr 2006; 20:30 UT
Credential Certification: Stefan Immler (immler@milkyway.gsfc.nasa.gov)

Subjects: Supernovae

Referred to by ATel #: 841, 916

We report on Swift Ultraviolet/Optical Telescope (UVOT) and X-Ray Telescope (XRT) observations of SN 2006bp (cf. CBET #470) obtained on Apr. 10.54 UT.

We confirm the detection of a new object at R.A. = 11h53m55s.70, Decl. = +52o21'10".4 (equinox 2000.0) as compared to Digitized Sky Survey images, consistent with the position reported by Nakano on CBET #470, with UVOT magnitudes V = 15.5, B = 15.8, U = 14.7, UVW1 [181-321 nm] = 14.8, UVM2 [166-268 nm] 15.2, and UVW2 [112-264 nm] = 14.9. Statistical and systematic errors are 0.1 mag each.

Comparing the B-V and U-B colors with other supernovae from Poznanski et al. (2002, PASP 114, 833) shows that 2006bp is a young type-II SN.

An excess of X-ray counts is detected from the position of the SN at a 2.0-sigma level in the 3.4 ks XRT data obtained simultaneously. The XRT net count rate of (1.7+/-0.9)E-03 cts/s corresponds to a (0.2-10 keV) X-ray flux and luminosity of (9.0+/-0.5)E-14 ergs/cm/cm/s and (2.4+/-1.3)E39 ergs/s, respectively, for an adopted thermal plasma spectrum with a temperature of kT=10 keV and a distance of 14.9 Mpc.

Further Swift observations are scheduled.

Swift UVOT finding chart