DocumentCode :
1930011
Title :
The central point source in G76.9+1.0
Author :
Marthi, V.R. ; Chengalur, J.N. ; Gupta, Y. ; Dewangan, G.C. ; Bhattacharya, D.
Author_Institution :
Nat. Centre for Radio Astrophys., Pune, India
fYear :
2011
fDate :
13-20 Aug. 2011
Firstpage :
1
Lastpage :
4
Abstract :
We describe the serendipitous discovery of a very steep-spectrum radio point source in low-frequency Giant Metrewave Radio Telescope (GMRT) images of the supernova remnant(SNR) G76.9+1.0. Earlier studies have shown that this SNR has a bipolar structure within a filled morphology. The steep spectrum, as well as the location of the point source near the centre of this SNR make it a very promising pulsar candidate. Archival Chandra X-ray data shows a point source coincident with the radio point source. However, no pulsed radio emission was detected despite deep searches at 610 MHz and 1160 MHz - which can be understood to be due to temporal broadening of the pulses. We underline the usefulness of low-frequency radio imaging as a good technique to prospect for pulsar candidates.
Keywords :
astronomical spectra; pulsars; supernova remnants; Chandra X-ray data; G76.9+1.0; bipolar structure; central point source; frequency 1160 MHz; frequency 610 MHz; low-frequency giant metrewave radiotelescope image; low-frequency radio imaging; pulsar candidate; pulse temporal broadening analysis; pulsed radio emission detection method; steep-spectrum radiopoint source; supernova remnant; Astrophysics; Data models; Delta modulation; Extraterrestrial measurements; Signal to noise ratio; X-ray imaging;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
General Assembly and Scientific Symposium, 2011 XXXth URSI
Conference_Location :
Istanbul
Print_ISBN :
978-1-4244-5117-3
Type :
conf
DOI :
10.1109/URSIGASS.2011.6051300
Filename :
6051300
Link To Document :
بازگشت