Swift Observations of SN 2006bv in UGC 7848
ATel #802; S. Immler, Goddard Space Flight Center, NASA, and Universities Space Research Association, and D. Pooley, University of California at Berkeley, on behalf of the Swift-satellite team
on 2 May 2006; 13:15 UT
Credential Certification: Stefan Immler (firstname.lastname@example.org)
Subjects: Optical, Ultra-Violet, X-ray, Supernovae
We report on Swift Ultraviolet/Optical Telescope (UVOT) and X-Ray Telescope (XRT) observations of the type-IIn SN 2006bv (CBET #493, #494) obtained on 2006-05-01.76 UT.
UVOT magnitudes are V = 18.9 Â± 0.2, B = 19.0 Â± 0.2, U = 18.6 Â± 0.2, UVW1 [181-321 nm] = 20.3 Â± 0.3, UVM2 [166-268 nm] = 20.1 Â± 0.3, and UVW2 [112-264 nm] = 20.8 Â± 0.3. Comparison to the magnitudes obtained on 2006-04-28.36 (unfiltered mag 17.8, CBET #493) shows that the SN is past maximum and fading rapidly.
No X-ray source is detected at the position of SN 2006bv in a simultaneous 4,514 s XRT observation. The 3-sigma upper limit to the count rate is 2.1E-03 cts/s, corresponding to an unabsorbed (0.2-10 keV) X-ray flux of 1.1E-13 ergs/cm/cm/s and a luminosity of 1.7E40 erg/s for an assumed thermal plasma spectrum with a temperature of 10 keV, an absorbing foreground column density of 1.60E+20 cm**-2 (Dickey & Lockman 1990, ARAA 28, 215) and a distance of 35.7 Mpc (z=0.00838; NED).