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Implications of aging in young supernovae
Poonam Chandra, Alak Ray
We present here the combined radio spectrum from the Giant Metrewave Radio Telescope (GMRT) and Very Large Array (VLA) of type-IIb SN 1993J (age 11 years) and a type-Ic SN 2003bg (…
Low frequency observations of SN 1993J with Giant Meterwave Radio Telescope
P. Chandra, A. Ray, S. Bhatnagar
In this paper, we discuss the low frequency spectrum of SN 1993J with GMRT. We observed SN 1993J at several epochs in 20cm, 50cm, 90cm and 125cm wavelengths and achieved near simul…
Radio Studies of Young Core Collapse Supernovae
Poonam Chandra, Alak Ray, Sanjay Bhatnagar
Multi-frequency observations of two radio bright SNe (SN1993J, SN1979C) carried out over a year with GMRT are presented. Their radio light curves trace the evolution of the mass lo…
Pulsar optical observation with the Very Large Telescope
A. Ray, P. Lundqvist, J. Sollerman +2
Optical data in the V-band gathered with the 8.2m ESO Very Large Telescope (VLT) at the radio interferometric position of PSR 1706-44 are presented. The pulsar is close to a bright…
X-ray observation of radio supernova SN1979C by ASCA
A. Ray, R. Petre, E. Schlegel
We report on the X-ray observation of the radio selected supernova SN1979C carried out with ASCA in December 1997. The supernova of type II was first observed in the optical…