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Swift UVOT detection of SN2011ek

ATel #3541; D. Xu, A. Gal-Yam (Weizmann), P. Nugent, R. C. Thomas (LBNL), M. Sullivan (Oxford), A. Howell (LCOGT)
on 9 Aug 2011; 22:26 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Dong Xu (dong.xu@weizmann.ac.il)

Subjects: Ultra-Violet, X-ray, Supernovae

Referred to by ATel #: 3550

The Swift satellite began observing SN2011ek (CBETs #2783 and #2785) on August 9th, 2011. The UVOT data show a relatively bright source coincident with the location of the supernova. Including possible contamination from the host galaxy, we measure the following preliminary magnitudes: UT(midtime) Filter Mag(AB) MagErr 0.7223 V 15.22 0.04 0.7120 B 15.82 0.03 0.7101 U 17.43 0.07 0.7072 UVW1 19.62 0.14 0.7297 UVM2 >22.31 N/A 0.7167 UVW2 21.43 0.22 There is no source detected by the XRT at this position, roughly corresponding to a 3sigma upper limit of 4x10^-13 erg/cm^2/s. Thanks go to the Swift team for performing these ToO observations.