Multifrequency Study of Giant Radio Pulses from the Crab Pulsar with the K5 VLBI Recording Terminal

Abstract

Simultaneous multifrequency observations of the Crab pulsar giant pulses (GPs) were performed with the 64-m Kalyazin radio telescope at four frequencies 0.6, 1.4, 2.2 and 8.3 GHz using the K5 VLBI recording terminal. The K5 terminal provided continuous recording in 16 4-MHz wide frequency channels distributed over 4 frequency bands. Several thousands of GPs were detected during about 6 hours of observations in two successive days in July 2005. Radio spectra of single GPs were analysed at separate frequencies and over whole frequency range. These spectra manifest notable modulation over frequency ranges, $\Delta \nu$, both on large ($\Delta \nu /\nu \approx 0.5$) and small ($\Delta \nu /\nu \approx 0.01$) frequency scales. Cross-correlation analysis of GPs at 2.2 GHz showed that their pulse shapes can be interpreted as an ensemble of unresolved bursts grouped together at time scales of $\approx 1$ mcs being well-correlated over a 60-MHz band. The corresponding GP cross-correlation functions do not obey the predictions of the amplitude-modulated noise model of Rickett (1975), thus indicating that unresolved components represent a small number of elementary emitters.

22 pages, 11 figures, 3 tables, submitted to PASJ

References in corpus (10)

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• Statistical properties of giant pulses from the Crab pulsar
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• A broadband radio study of the average profile and giant pulses from PSR B1821-24A
• Dual-frequency single-pulse study of PSR B0950+08
• Effects of Intermittent Emission: Noise Inventory for Scintillating Pulsar B0834+06
• Wide-Band Spectra of Giant Radio Pulses from the Crab Pulsar
• Noise and Signal for Spectra of Intermittent Noiselike Emission
• Statistical and polarization properties of giant pulses of the millisecond pulsar B1937+21