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Swift/UVOT observations of ASASSN-14ha

ATel #6461; Peter J. Brown (Texas A&M/Mitchell Institute)
on 12 Sep 2014; 02:03 UT
Credential Certification: Peter J. Brown (grbpeter@yahoo.com)

Subjects: Optical, Ultra-Violet, Supernovae

ASASSN-14ha (ATEL#6460) in NGC1566 was observed by Swift/UVOT beginning 2014-09-11 20:23:20 UT. The following UVOT magnitudes were measured: uvw2 (80 s): 12.4 +/- 0.1, uvm2 (1100 s): 12.3 +/- 0.1, uvw1 (80 s): 12.6 +/- 0.1, u (80 s): 13.1 +/- 0.1, b (80 s): 14.6 +/- 0.1, v (80 s): 14.6 +/- 0.1. These magnitudes are reduced using the method outlined for the Swift Optical Ultraviolet Supernova Archive (SOUSA; Brown et al 2014, Ap&SS, in press, arXiv:1407.3808) on the Swift/UVOT photometric system (Poole et al. 2008, Breeveld et al. 2011) . The UV-optical colors are very blue, similar to shock breakouts or young SNe II (Brown et al. 2014). ASASSN-14ha is likely a young core-collapse supernova.

Swift Supernovae