Swift Observations of SN2007cv
ATel #1127; P. J. Brown (Penn State) on behalf of the Swift satellite team
on 4 Jul 2007; 00:08 UT
Credential Certification: Peter J. Brown (pbrown@astro.psu.edu)
Subjects: Optical, Ultra-Violet, Supernovae
Swift's Ultraviolet/Optical Telescope (UVOT)
observed SN 2007cv (CBET #989) on 2007-06-30.76 UT.
The following UVOT magnitudes were measured:
V = 16.0 +/- 0.1 (206 s exposure time),
B = 16.4 +/- 0.1 (206 s), U = 16.3 +/- 0.1 (206 s),
UVW1 [181-321nm] = 18.5 +/- 0.1 (412 s), UVM2 [166-268 nm] > 19.4 (117 s),
and UVW2 [112-264 nm] = 20.0 +/- 0.2 (824 s).
In a second observation on 2007-07-02.77
the SN brightened to V = 15.7 +/- 0.1 (203 s),
B = 15.9 +/- 0.1 (203 s), U = 15.6 +/- 0.1 (203 s),
UVW1 = 17.6 +/- 0.1 (406 s), UVM2 > 19.5 (125 s),
and UVW2 [112-264 nm] = 19.8 +/- 0.2 (812 s).
These magnitudes have not been corrected for
extinction. The optical colors best match a
young Ia (Poznanski, Gal-Yam, Maoz, Filippenko,
Leonard, & Matheson, 2002, PASP, 114, 833) as do
the red UV-optical colors (e.g.
Brown et al., 2005, ApJ, 635, 1192; Immler et al.,
2006, ApJL, 648, 119).
