Publications (8)
325 and 610 MHz Radio Counterparts of SNR G353.60.7 a.k.a. HESS J1731347
A. J. Nayana, Poonam Chandra, Subhashis Roy +6
HESS J1731347 a.k.a. SNR G353.60.7 is one of the five known shell-type supernova remnants (SNRs) emitting in the very high energy (VHE, Energy 0.1 TeV) -ray domain. W…
Type IIP Supernova SN 2004et: A Multi-Wavelength Study in X-Ray, Optical and Radio
Kuntal Misra, Dave Pooley, Poonam Chandra +4
We present X-ray, broad band optical and low frequency radio observations of the bright type IIP supernova SN 2004et. The \cxo observed the supernova at three epochs, and the optic…
Type Ib supernova Master OT J120451.50+265946.6: radio emitting shock with inhomogeneities crossing through a dense shell
Poonam Chandra, A. J. Nayana, Claes-Ingvar Bjornsson +4
We present radio observations of a Type Ib supernova (SN) Master OT J120451.50+265946.6. Our low frequency Giant Metrewave Radio Telescope (GMRT) data taken when the SN was in the…
Neutron Star Physics in the Square Kilometer Array Era : An Indian Perspective
Sushan Konar, Manjari Bagchi, Debades Bandyopadhyay +14
It is an exceptionally opportune time for Astrophysics when a number of next-generation mega-instruments are poised to observe the universe across the entire electromagnetic spectr…
Radio and X-ray Observations of the Transitional Supernova 2019yvr: Insights into the Progenitor Mass-Loss History
Raphael Baer-way, Poonam Chandra, Maryam Modjaz +7
The final life stages of the massive star progenitors of stripped-envelope supernovae (SESNe) are still an open question, especially when it comes to the timing and magnitude of th…
Dinosaur in a Haystack : X-ray View of the Entrails of SN 2023ixf and the Radio Afterglow of Its Interaction with the Medium Spawned by the Progenitor Star (Paper 1)
A. J. Nayana, Raffaella Margutti, Eli Wiston +24
We present the results from our extensive hard-to-soft X-ray (NuSTAR, Swift-XRT, XMM-Newton, Chandra) and meter-to-mm wave radio (GMRT, VLA, NOEMA) monitoring campaign of the very…
SN 2017hcc and SN 2023usc a comparative spectroscopic study of type IIn supernovae
Sethulakshmi Vazhayil, Firoza K. Sutaria, Riddhiman Sharma +1
We report on a spectroscopic study of the bright, nearby type-IIn supernova SN 2017hcc, and SN 2023usc using data obtained from the Himalayan Chandra Telescope (HCT). SN 2017hcc is…
Long term behaviour of a Type IIP supernova SN 2004dj in the radio bands
Nayana A J, Poonam Chandra, Alak K. Ray
We present radio observations and modelling of one of the nearest and brightest Type IIP supernova SN\,2004dj exploded in the galaxy NGC 2403 at a distance of 3.5 Mpc. Our o…