First GMRT observations towards the SNR G15.4+0.1/HESS J1818-154 system

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

Calcuta

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

International Astronomical Union (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 bservations 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. A high resolution image at 610 MHz suggests the presence of point like sources surrounded by diffuse emission outside our phased array beam. Analysis of data with a larger beam is in progress, which may confirm a putative pulsar and its wind nebula.