Abstract Details
| Name: Subhash Bose Affiliation: ARIES Conference ID: ASI2015_652 Title : Optical characterization of supernova 2013ej Authors and Co-Authors : Subhash Bose^1, Firoza Sutaria^2, Brijesh Kumar^1, Kuntal Misra^1, Vikram Dwarkadas^1, Mridweeka Singh^1 1> ARIES, Nainital 2> IIA, Bnagalore 3> University of Chicago, Chicago Abstract Type : Poster Abstract Category : Extragalactic astronomy Abstract : We present optical observations collected primarily from Indian observatories for a type IIP supernova (SN) 2013ej. It is one of the brightest and nearest supernova of the year 2013, and thus making it one of the most interesting object for in-depth analysis. Broadband UBVRI photometric and low-resolution optical spectroscopic data is presented and analysed. Using NaID lines as a probe for reddening determination from high resolution Echelle spectrum obtained during plateau-nebular transition phase, we infer that the SN suffers very low or negligible line-of-sight extragalactic extinction as no NaID impression for host is found in the spectrum, thus only we accounted for galactic extinction. The absolute and bolometric light-curve comparison suggest it to be a normal IIP SN, but with relatively steeper plateau decline rate (~ 1.83 mag/100days in V band) as compared to other canonical IIP events. The luminosity drop from plateau to nebular transition is also found to quite higher than other typical events (~0.88 dex) which also implies relatively low synthesized radioactive nickel mass estimation from tail luminosity, which is 0.023 M_sun. In this study we shall also present velocity evolution of H_alpha, H_beta and FeII lines, and it’s comparison with other archetypal events. |