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Revealing nature of GRB 210205A, ZTF21aaeyldq (AT2021any), and follow-up observations with the 4K4K CCD Imager+3.6m DOT
Rahul Gupta, Amit Kumar, Shashi Bhushan Pandey +14
Optical follow-up observations of optical afterglows of gamma-ray bursts are crucial to probe the geometry of outflows, emission mechanisms, energetics, and burst environments. We…
Quest for the upcoming periastron passage of an episodic dust maker and particle accelerating colliding wind binary: WR 125
Bharti Arora, J. C. Pandey, M. De Becker +4
We have carried out a long term infrared and X-ray investigation of the colliding wind binary WR 125 (WC7+O9III). The source was monitored using AstroSat-Soft X-ray Telescope and T…
Discovery and confirmation of the shortest gamma ray burst from a collapsar
Tomas Ahumada, Leo P. Singer, Shreya Anand +54
Gamma-ray bursts (GRBs) are among the brightest and most energetic events in the universe. The duration and hardness distribution of GRBs has two clusters, now understood to reflec…
The optical properties of three type II supernovae: 2014cx, 2014cy and 2015cz
R. Dastidar, K. Misra, M. Singh +19
We present the photometric and spectroscopic analysis of three Type II SNe: 2014cx, 2014cy and 2015cz. SN 2014cx is a conventional Type IIP with a shallow slope (0.2 mag/50d) and a…
SN 2020ank: a bright and fast-evolving H-deficient superluminous supernova
Amit Kumar, Brajesh Kumar, S. B. Pandey +7
We investigate the observational properties of a hydrogen-deficient superluminous supernova (SLSN) SN 2020ank (at z = 0.2485), with the help of early phase observations carried out…