Assessment of Pulsar and Rotating Radio Transient Detection Rates for the Arecibo Pulsar-ALFA Survey

Details Assessment of Pulsar and Rotating Radio Transient Detection Rates for the Arecibo Pulsar-ALFA Survey Assessment of Pulsar and Rotating Radio Transient Detection Rates for the Arecibo Pulsar-ALFA Survey

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...208.0406d&link_type=abstract

American Astronomical Society Meeting 208, #4.06; Bulletin of the American Astronomical Society, Vol. 38, p.82

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Scientific paper

Preliminary processing of Pulsar-ALFA (PALFA) survey data has so far discovered 24 new pulsars, including one bursty object which fits the signature of RRATs (Rotating RAdio Transients). RRATs are a newly defined class of radio-loud, pulsar-like neutron stars whose existence and characteristics mandate a reassessment of the number of projected new discoveries for the PALFA survey.11 RRATs were discovered by the Parkes multi-beam pulsar survey. Single bursts occurring at irregular intervals ranging from several minutes to several hours for different objects is characteristic for this class of neutron stars. While they were discovered with a giant pulse search code routinely used by PALFA, the intensity distribution of RRAT pulses is different from the distribution of giant pulses from the Crab and other pulsars known to emit giant pulses.The transient nature of RRATs makes them more difficult to detect and means that their total population in the Galaxy may significantly outnumber the population of pulsars detectable by their periodic pulsed emission. We will present an estimate of the number of RRATs detectable by PALFA, and a revised estimate of the detection rates for regularly pulsing and giant pulse emitting pulsars.

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