SIMULTANEOUS OBSERVATIONS of GIANT PULSES from PULSAR PSR B0031-07 at 38 and 74 MHz

Jr Wei Tsai, John H. Simonetti, Brandon Bear, Jonathan D. Gough, Joseph R. Newton, Michael Kavic

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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-3. No other transient pulses were detected in the data in the wide DM range from 1 to 5000 pc cm-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.

Original languageEnglish (US)
Article number65
JournalAstronomical Journal
Volume151
Issue number3
DOIs
StatePublished - Mar 2016

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pulses
power law
wavelength
distribution
normal density functions
flux density
stations
slopes
broadband
index
station
wavelengths

Keywords

  • pulsars: general
  • pulsars: individual (PSR B0031-07)
  • scattering

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

SIMULTANEOUS OBSERVATIONS of GIANT PULSES from PULSAR PSR B0031-07 at 38 and 74 MHz. / Tsai, Jr Wei; Simonetti, John H.; Bear, Brandon; Gough, Jonathan D.; Newton, Joseph R.; Kavic, Michael.

In: Astronomical Journal, Vol. 151, No. 3, 65, 03.2016.

Research output: Contribution to journalArticle

Tsai, Jr Wei ; Simonetti, John H. ; Bear, Brandon ; Gough, Jonathan D. ; Newton, Joseph R. ; Kavic, Michael. / SIMULTANEOUS OBSERVATIONS of GIANT PULSES from PULSAR PSR B0031-07 at 38 and 74 MHz. In: Astronomical Journal. 2016 ; Vol. 151, No. 3.
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