The origin of soft X-rays from radio loud supernova SN1995N
PI: P. Chandra (Tata Institute, Mumbai \& Joint Astronomy Program, IISc., Bangalore),
Co-Is: A. Ray (Tata Inst, Mumbai), F.K. Sutaria (Tech. Univ. Munich, Germany), E. Schlegel (Center for Astrophysics, Harvard-Smithsonian Observatory, Cambridge, USA)
The interaction of a supernova shock with its surrounding medium produces X-ray emission which also probes the environment. The soft X-rays arise either from the heating of the exploding star's ejecta by a reverse shock propagating into it, or alternatively, due to the radiative cooling of clumped, pre-existing clouds crushed by the shocked circumstellar wind. The ionized plasma emission linewidths, abundance of elements in the radiating zone and temporal evolution of the X-ray luminosity are diagnostics to discriminate between the two models. We request a 55 ksec Chandra ACIS spectroscopic observation of a radio loud, X-ray bright supernova SN1995N towards this goal. Additionally this will constrain the mass of the progenitor star by measuring the nucleosynthetic yields.
GMRT radio observations of four recently exploded core collapse supernovae.
P. Chandra (Tata Institute, Mumbai \& Joint Astronomy Program, IISc., Bangalore), A. Ray (Tata Inst, Mumbai), S. Bhatnagar (NCRA-TIFR, Pune and NRAO, Socorro, NM, USA).
Supernovae 1993J and 1979C (in the 610 MHz and 1420 MHz bands with GMRT), -- P. Chandra, S. Bhatnagar, and A. Ray, IAU Circular No. 7657 (2001).
Supernova 2001gd in NGC 5033 -- P. Chandra, A. Ray and S. Bhatnagar IAU Circular No. 7982 (2002).
Supernova 2001ig in NGC 7424 -- P. Chandra, A. Ray and S. Bhatnagar IAU Circular No. 7994 (2002).
Supernova 2002hh in NGC 6946 -- P. Chandra, A. Ray and S. Bhatnagar IAU Circular No. 8041 (2003).