An Observational Study of the Strong Single Pulses of PSR J0034-0721

Details An Observational Study of the Strong Single Pulses of PSR J0034-0721 An Observational Study of the Strong Single Pulses of PSR J0034-0721

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010acasn..51..253n&link_type=abstract

Acta Astronomica Sinica, vol. 51, no. 3, p. 253-262

Astronomy and Astrophysics

Astronomy

Stars: Neutron, Pulsars: Individual

Scientific paper

Using the Urumqi 25 m radio telescope on Aug. 6th 2007, the analysis results of strong single pulses of PSR J0034-0721 observed at 1.54 GHz are reported. 1-hr data is collected. Using the single-pulse searching method, 116 strong pulses of PSR J0034-0721 with signal-to-noise ratios (RSN) above 5σ threshold are detected. The RSN values of the detected pulses are from 5 to 10.5 and the peak fluxes of these pulses are approximately 14 to 29 times that of the average pulse (AP). However, these values are much less than those of the classical giant pulses. The cumulative distribution of the RSN of these pulses has roughly a power-law distribution with a slope of -4.3±0.4. The detectivity of the pulses with RSN≳5 and RSN≳10 are 3% and 0.08%, respectively. The half peak line breadths W50 of these pulses range from 1.6 ms to 8 ms, with an average value of 3.9 ms. Most of the pulses cluster in the narrow region centering at the peak of the AP. However, two strong pulses with RSN>8.5 are detected at the phase about 33 ms earlier than the phase of the AP peak. This may indicate that there are two strong-pulse emitting regions.

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