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Title: SIMULTANEOUS OBSERVATIONS OF GIANT PULSES FROM PULSAR PSR B0031-07 AT 38 AND 74 MHz

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 generatedmore » in a wide band.« less
Authors:
; ;  [1] ;  [2] ;  [3] ;  [4]
  1. Department of Physics, Virginia Tech, Blacksburg, VA 24061 (United States)
  2. Department of Chemistry, Lehman College, CUNY, Bronx, NY 10468 (United States)
  3. Department of Chemistry and Physics, Augusta University, Augusta, GA 30912 (United States)
  4. Department of Physics, Long Island University, Brooklyn, NY 11201 (United States)
Publication Date:
OSTI Identifier:
22519998
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astronomical Journal (Online); Journal Volume: 151; Journal Issue: 3; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; FLUX DENSITY; GAUSS FUNCTION; MHZ RANGE; NOISE; PULSARS; PULSES; SCATTERING; TRANSIENTS; WAVELENGTHS