GMRT observations of G15.4+0.1/HESS J1818-154

CASTELLETTI G., B. C. JOSHI, MAYURESH SURNIS, SUPAN L., DUBNER G.

Calcuta

Simposio; Supernova Environmental Impacts Proceedings IAU Symposium Nº 296; 2013

IAU

We report here on the first dedicated simultaneous imaging and pulsar observations towards the supernova remnant (SNR) G15.4+0.1, the possible counterpart of the very high energy (VHE) source HESS J1818-154. The observations were carried out using the Giant Metrewave Radio Telescope (GMRT) at 610 and 1400 MHz. Preliminary analysis of data suggests absence of pulsations towards the centroid of HESS J1818-154, with upper limits of 0.6 and 0.3 mJy at 610 and 1400 MHz, respectively. Analysis of data with a larger beam is in progress, which may confirm the presence of a putative pulsar and its wind nebula if it is offset from the centroid of HESS J1818-154.