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of 18
pro vyhledávání: '"Ray, Alak K."'
We report Chandra-ACIS observations of SN 2023ixf in M101 on day 13 and 86 since the explosion. The X-rays in both epochs are characterized by high temperature plasma from the forward shocked region as a result of circumstellar interaction. We are ab
Externí odkaz:
http://arxiv.org/abs/2311.04384
Autor:
Chandra, Poonam, Nayana, A. J., Bjornsson, Claes-Ingvar, Taddia, Francesco, Lundqvist, Peter, Ray, Alak K., Shapee, Benjamin
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 optically thick phase for observed frequencies reveal inhomogeneities
Externí odkaz:
http://arxiv.org/abs/1904.06392
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 $\sim$ 3.5 Mpc. Our observations span a wide frequency and temporal range of 0.24 - 43 GHz
Externí odkaz:
http://arxiv.org/abs/1808.00283
Autor:
Nayana, A. J., Chandra, Poonam, Roy, Subhashis, Green, David A., Acero, Fabio, Lemoine-Goumard, Marianne, Marcowith, Alexandre, Ray, Alak K., Renaud, Matthiew
HESS J1731$-$347 a.k.a. SNR G353.6$-$0.7 is one of the five known shell-type supernova remnants (SNRs) emitting in the very high energy (VHE, Energy $>$ 0.1 TeV) $\gamma$-ray domain. We observed this TeV SNR with the Giant Metrewave Radio Telescope (
Externí odkaz:
http://arxiv.org/abs/1701.02765
Akademický článek
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Autor:
Konar, Sushan, Bagchi, Manjari, Bandyopadhyay, Debades, Banik, Sarmistha, Bhattacharya, Dipankar, Bhattacharyya, Sudip, Gangadhara, R. T., Gopakumar, A., Gupta, Yashwant, Joshi, B. C., Maan, Yogesh, Maitra, Chandreyee, Mukherjee, Dipanjan, Pai, Archana, Paul, Biswajit, Ray, Alak K., Sutaria, Firoza K.
Publikováno v:
J. Astrophys. Astr. 37 36 (2016)
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 spectrum with unprecedented data quality. The Square Kilometre Array (SKA) i
Externí odkaz:
http://arxiv.org/abs/1610.08175
Autor:
Misra, Kuntal, Pooley, Dave, Chandra, Poonam, Bhattacharya, D., Ray, Alak K., Sagar, Ram, Lewin, Walter H. G.
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 optical coverage spans a period of $\sim$ 470 days since explosion. The X-r
Externí odkaz:
http://arxiv.org/abs/0707.3485
Akademický článek
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Autor:
Nayana A. J., Chandra, Poonam, Roy, Subhashis, Green, David A., Acero, Fabio, Lemoine-Goumard, Marianne, Marcowith, Alexandre, Ray, Alak K., Renaud, Matthieu
Publikováno v:
Monthly Notices of the Royal Astronomical Society; May2017, Vol. 467 Issue 1, p155-163, 9p
Autor:
Misra, Kuntal, Pooley, Dave, Chandra, Poonam, Bhattacharya, D., Ray, Alak K., Sagar, Ram, Lewin, Walter H. G.
Publikováno v:
Monthly Notices of the Royal Astronomical Society; 10/11/2007, Vol. 381 Issue 1, p280-292, 13p, 1 Black and White Photograph, 5 Charts, 12 Graphs