SIMULTANEOUS OBSERVATIONS OF GIANT PULSES FROM PULSAR PSR B0031-07 AT 38 AND 74 MHz
- Department of Physics, Virginia Tech, Blacksburg, VA 24061 (United States)
- Department of Chemistry, Lehman College, CUNY, Bronx, NY 10468 (United States)
- Department of Chemistry and Physics, Augusta University, Augusta, GA 30912 (United States)
- Department of Physics, Long Island University, Brooklyn, NY 11201 (United States)
The first station of the Long Wavelength Array was used to study PSR B0031-07 with simultaneous observations at 38 and 74 MHz. We found that 158 (0.35%) of the observed pulses at 38 MHz and 221 (0.49%) of the observed pulses at 74 MHz qualified as giant pulses (GPs) in a total of 12 hr of observations. GPs are defined as having flux densities of a factor of ≥90 times that of an average pulse (AP) at 38 MHz and ≥80 times that of an AP at 74 MHz. The cumulative distribution of pulse strength follows a power law, with an index of −4.2 at 38 MHz and −4.9 at 74 MHz. This distribution has a much more gradual slope than would be expected if observing the tail of a Gaussian distribution of normal pulses. The dispersion measure (DM) value which resulted in the largest signal to noise for dedispersed pulses was DM = 10.9 pc cm{sup −3}. No other transient pulses were detected in the data in the wide DM range from 1 to 5000 pc cm{sup −3}. There were 12 GPs detected within the same period from both 38 and 74 MHz, meaning that the majority of them are not generated in a wide band.
- OSTI ID:
- 22519998
- Journal Information:
- Astronomical Journal (Online), Vol. 151, Issue 3; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-3881
- Country of Publication:
- United States
- Language:
- English
Similar Records
Observations of giant pulses from pulsar B0950+08 using LWA1
Low-frequency Observations of the Subpulse Drifter PSR J0034−0721 with the Murchison Widefield Array