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Continued Swift/UVOT Monitoring of PTF11kly / SN2011fe

ATel #3594; S. B. Cenko (UC Berkeley), E. O. Ofek (Caltech, P. E. Nugent (LBNL / UC Berkeley), and J. S. Bloom (UC Berkeley) report on behalf of a larger collaboration:
on 26 Aug 2011; 07:15 UT
Credential Certification: S. Bradley Cenko (cenko@astro.berkeley.edu)

Subjects: Optical, Ultra-Violet, Supernovae, Transient

The UV-Optical Telescope on Swift has continued to monitor the field of PTF11kly / SN2011fe (ATEL #3581). In an orbit beginning at 00:01:40 UT on 2011 August 26, we report the following preliminary AB magnitudes:

V: 13.83 +/- 0.03
B: 13.99 +/- 0.03
U: 15.26 +/- 0.03
UVW1: 17.33 +/- 0.05
UVM2: 18.92 +/- 0.08
UVW2: 18.48 +/- 0.07

Compared with the first epoch of UVOT imaging (ATEL #3590), the supernova has brightened significantly in all filters. The fastest evolution is occurring in the optical bands, implying the supernova is becoming redder with time.

We gratefully acknowledge the effort of the entire Swift team. Observations are ongoing.