Abstract Details
| Name: Brajesh Kumar Affiliation: Indian Institute of Astrophysics, Bangalore Conference ID: ASI2018_917 Title : Long term optical monitoring of the transitional Type Ic/BL-Ic supernova ASASSN-16fp (SN 2016coi) Authors and Co-Authors : A. Singh, S. Srivastav, D. K. Sahu and G. C. Anupama Indian Institute of Astrophysics, Bangalore Abstract Type : Contributed Talk Abstract Category : Extragalactic astronomy Abstract : We present results based on intensive optical monitoring of the nearby ($\sim$18 Mpc) Type Ic supernova (SN) ASASSN-16fp (SN 2016coi). The monitoring of this event was initiated a few days after the explosion and covers a period of about 455 days. The observations were performed using the 2-m Himalayan Chandra Telescope and the newly installed 3.6-m Devasthal Optical Telescope. The \textit{UBVRI} light curves of ASASSN-16fp are broad, indicating its slow evolution. The peak absolute magnitude ($M_{V}$ = $-17.7 \pm 0.2$ mag) is fainter than the gamma-ray burst/X-ray flash associated supernovae (SN 1998bw, 2006aj), and comparable to other broad-lined (BL) e.g. SN~2002ap, SN~2012ap and transitional type SN~2004aw. The $B-V$ and $V-R$ colours are significantly redder in comparison to other similar type of events. ASASSN-16fp also shows slow spectral evolution. The expansion velocity of the ejecta near maximum light reached $\sim$16000 km s$^{-1}$ and settled to $\sim$8000 km s$^{-1}$ ($\sim$1 month post-maximum). Analytical modelling of the quasi-bolometric light curve suggests that $\sim$0.1 M$_{\odot}$ of $^{56}$Ni was synthesized in the explosion. The kinetic energy and ejecta mass are estimated to be 6.9$^{+1.5}_{-1.3}$ $\times$ 10$^{51}$ erg and $\sim$4.5\,$\pm$\,0.3 M$_{\odot}$, respectively. |