Abstract Details
| Name: Avishek Kumar Basu Affiliation: National Center for Radio Astrophysics- Tata Institute of Fundamental Research Conference ID: ASI2017_837 Title : Simultaneous Radio and X-ray Observation of Crab Pulsar Authors and Co-Authors : Avishek kumar Basu (NCRA-TIFR), Dipankar Bhattacharyaa (IUCAA), Bhal Chandra Joshi(NCRA-TIFR), Sachindra Naik(PRL), A R Rao(TIFR), Biswajit Paul(RRI), Santosh Vadawale(PRL), Vishal Gajjar (UC-Berkeley/SETI), Arun Naid(NCRA-TIFR), Brijesh Kumar(ARIES) Abstract Type : Oral Abstract Category : Stars,ISM and the Galaxy Abstract : Rotation powered isolated neutron stars are known to emit radiation in broad range of electromagnetic spectrum from radio frequencies to high energy gamma rays. These objects are known to be the efficient source of particle acceleration due to their intense magnetic field. Charge particles, mostly electrons and positrons get accelerated along the open field lines and emit non-thermal high energy gamma-ray photons that have timing characteristics of the parent neutron star. These particles generate secondary plasma higher up in the magnetosphere leading to coherent radio radiation. Crab pulsar, PSR B0531+21, is a unique neutron star, where pulsed emission has been detected over the entire range of electromagnetic spectrum. In addition, it exhibits very intense sporadic radio pulses, known as Giant pulses (GP). The mechanism for production of such pulses is not known and simultaneous multi-frequency observations can constrain theoretical attempts to explain this emission. We have carried out a campaign of simultaneous observations from radio to high energies, using three Indian facilities, namely, the Ooty Radio Telescope, the Giant Meterwave Radio Telescope and newly commissioned ASTROSAT. The results of this campaign are reported in this paper. We have calibrated the temporal offsets among the participating telescopes and examined the occurence of GP at all the wavebands observed. Implications of these results will also be discussed. |