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Twins for life? A comparative analysis of the Type Ia supernovae 2011fe and 2011by
Melissa L. Graham, Ryan J. Foley, Weikang Zheng +6
The nearby Type Ia supernovae (SNe Ia) 2011fe and 2011by had nearly identical photospheric phase optical spectra, light-curve widths, and photometric colours, but at peak brightnes…
Estimating the First-Light Time of the Type Ia Supernova 2014J in M82
WeiKang Zheng, Isaac Shivvers, Alexei V. Filippenko +6
The Type Ia supernova (SN Ia) 2014J in M82 (d~3.5 Mpc) was serendipitously discovered by S. Fossey's group on 2014 Jan. 21 UT and has been confirmed to be the nearest known SN Ia s…
Clues To The Nature of SN 2009ip from Photometric and Spectroscopic Evolution to Late Times
M. L. Graham, D. J. Sand, S. Valenti +7
We present time series photometric and spectroscopic data for the transient SN 2009ip from the start of its outburst in September 2012 until November 2013. This data was collected…