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Swift/UVOT observations of PSN J10435372+1140177 in M95

ATel #3979; Peter J. Brown (Texas A&M)
on 19 Mar 2012; 22:14 UT
Credential Certification: Peter J. Brown (grbpeter@yahoo.com)

Subjects: Optical, Ultra-Violet, Supernovae

Referred to by ATel #: 3991, 3995

The Ultraviolet/Optical Telescope (UVOT) on board the Swift satellite began observing PSN J10435372+1140177 in M95 < http://www.cbat.eps.harvard.edu/unconf/followups/J10435372+1140177.html > on 2012-03-19 17:44:10. The following preliminary UVOT magnitudes were measured (subtracting the underlying galaxy flux as in Brown et al. 2009, AJ, 137, 4517): v = 13.68 +/-0.04 (80 s exposure time), b = 13.56 +/-0.04 (80 s), u = 12.36 +/-0.04 (80 s), uvw1 [181-321 nm] = 12.13 +/-0.1 (160 s), uvm2 [166-268 nm] = 12.05 +/-0.04 (1251 s), uvw2 [112-264 nm] = 12.20 +/-0.1 (320 s). These magnitudes are on the UVOT photometric system (Breeveld et al. 2011, arXiv:1102.4717 ) which in the optical is close to Johnson UBV, and have not been corrected for extinction.

Compared to other SNe observed with Swift, the colors are very blue and UV bright (Brown et al. 2009). This strongly suggests a young type II SN. Further Swift observations, including UV spectroscopy, have been requested.