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Swift Observations of SN2007cv

ATEL # 1127; P. J. Brown (Penn State) on behalf of the Swift satellite team
on 4 Jul 2007; 0:08 UT
Password Certification: Peter J. Brown (pbrown@astro.psu.edu)

Subjects: Optical, Ultra-Violet, Nova, Supernova

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).


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