Early ultraviolet emission in the Type Ia supernova LSQ12gdj: no evidence for ongoing shock interaction

@article{Scalzo2014EarlyUE,
  title={Early ultraviolet emission in the Type Ia supernova LSQ12gdj: no evidence for ongoing shock interaction},
  author={Richard A. Scalzo and Michael J. Childress and Brad E. Tucker and Fang Yuan and Brian Schmidt and Peter. J. Brown and Carlos Contreras and Nidia I. Morrell and Eric Y. Hsiao and Christopher R. Burns and Mark M. Phillips and Abdo Campillay and C. Gonz{\'a}lez and Kevin Krisciunas and Maximilian D. Stritzinger and Melissa. L. Graham and Jerod Parrent and Stefano Valenti and Christopher E. Lidman and Bradley E. Schaefer and Nicholas Scott and Morgan Fraser and Avishay Gal-yam and Cosimo Inserra and Kate Maguire and Steven J. Smartt and Jesper Sollerman and Mark Sullivan and Francesco Taddia and Ofer Yaron and David R. Young and Stefan Taubenberger and C. Baltay and Nancy E. Ellman and Ulrich Feindt and Ellie Hadjiyska and Ryan McKinnon and Peter E. Nugent and David L. Rabinowitz and Emma S. Walker},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2014},
  volume={445},
  pages={30-48}
}
We present photospheric-phase observations of LSQ12gdj, a slowly declining, UV-bright Type Ia supernova. Classified well before maximum light, LSQ12gdj has extinction-corrected absolute magnitude M-B = -19.8, and pre-maximum spectroscopic evolution similar to SN 1991T and the super-Chandrasekhar-mass SN 2007if. We use ultraviolet photometry from Swift, ground-based optical photometry, and corrections from a near-infrared photometric template to construct the bolometric (1600-23 800 angstrom… 
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