STATISTICAL STUDIES OF GIANT PULSE EMISSION FROM THE CRAB PULSAR

Journal Article · Tue Nov 01 04:00:00 EDT 2011 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/741/1/53; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)· OSTI ID:21612727

Majid, Walid A; Naudet, Charles J; Lowe, Stephen T; Kuiper, Thomas B. H., ^[1]

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1. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109 (United States)

We have observed the Crab pulsar with the Deep Space Network Goldstone 70 m antenna at 1664 MHz during three observing epochs for a total of 4 hr. Our data analysis has detected more than 2500 giant pulses, with flux densities ranging from 0.1 kJy to 150 kJy and pulse widths from 125 ns (limited by our bandwidth) to as long as 100 {mu}s, with median power amplitudes and widths of 1 kJy and 2 {mu}s, respectively. The most energetic pulses in our sample have energy fluxes of approximately 100 kJy {mu}s. We have used this large sample to investigate a number of giant pulse emission properties in the Crab pulsar, including correlations among pulse flux density, width, energy flux, phase, and time of arrival. We present a consistent accounting of the probability distributions and threshold cuts in order to reduce pulse-width biases. The excellent sensitivity obtained has allowed us to probe further into the population of giant pulses. We find that a significant portion, no less than 50%, of the overall pulsed energy flux at our observing frequency is emitted in the form of giant pulses.

• OSTI ID: 21612727
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 741; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ANTENNAS
ASTROPHYSICS
COSMIC RADIO SOURCES
DATA ANALYSIS
ELECTRICAL EQUIPMENT
EMISSION
EQUIPMENT
FLUX DENSITY
PHYSICS
PROBABILITY
PULSARS