Imaging and search for radio pulsations towards TeV supernova remnants with GMRT

MAYURESH SURNIS; JORGE LEONARDO SUPÁN; GABRIELA CASTELLETTI; BHAL CHANDRA JOSHI

Calcuta

Congreso; The Metrewavelength Sky: Celebrating 50 years of Radio Astronomy at TIFR; 2013

Tata Institute of Fundamental Research (TIFR, India)

We have used GMRT to carry out simultaneous imaging and time series observations at 610 and 1280 MHz of three galactic supernova remnants: G25.5+0.0, G22.7-0.2, and G15.4+0.1. The new data constitute the first dedicated observations made towards these objects at these radio frequencies. Recently, TeV gamma-ray sources, namely HESS J1837-069, HESS J1832-093 and HESS J1818-154, have been detected in the area of these remnants. On the basis of the new GMRT data we investigate the spectral and morphological properties of the SNRs and search for radio pulsations from still undetected pulsars interior to these sources. Our study provides valuable information to understand the origin of the gamma-ray radiation proposed to be associated with these three SNRs.