Abstract Details
| Name: Brajesh Kumar Affiliation: IIA, Bengaluru Conference ID: ASI2019_97 Title : Optical monitoring of Type IIb Supernova 2017gkk Authors and Co-Authors : Brajesh Kumar, Avinash Singh, D K Sahu and G C Anupama Abstract Type : Poster Abstract Category : Extragalactic Astronomy Abstract : We present Bessell UBVRI imaging and low-resolution optical spectra of the nearby supernova (SN) 2017gkk, discovered in NGC 2748. The follow-up observations were initiated a few days after the discovery and span ~200 days. During this period we obtained 34 epoch photometric and 21 epoch spectroscopic data points using 2m Himalayan Chandra Telescope. The event was classified as a Type IIb SN based on the spectra taken around 11 days before maximum light. The H and He line velocities are around 15000 and 10000 km/sec, respectively at this phase. Preliminary analysis indicates that light curve of SN 2017gkk reaches B-band maximum about 23 days after the explosion and resembles SN 2015as and SN 2011dh but evolves slowly in comparison with SN 2011fu. The light curve and spectral analysis is under progress and final results will be presented during the meeting. |