Simultaneous Dual‐Frequency Observations of Giant Pulses from the Crab Pulsar
نویسندگان
چکیده
منابع مشابه
Simultaneous Dual Frequency Observations of Giant Pulses from the Crab Pulsar
Simultaneous measurements of giant pulses from the Crab pulsar were taken at two widely spaced frequencies using the real-time detection of a giant pulse at 1.4GHz at the Very Large Array to trigger the observation of that same pulse at 0.6GHz at a 25-m telescope in Green Bank, WV. Interstellar dispersion of the signals provided the necessary time to communicate the trigger across the country v...
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Individual giant radio pulses (GRPs) from the Crab pulsar last only a few microseconds. However, during that time they rank among the brightest objects in the radio sky reaching peak flux densities of up to 1500 Jy even at high radio frequencies. Our observations show that GRPs can be found in all phases of ordinary radio emission including the two high frequency components (HFCs) visible only ...
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We have detected occasional, short-lived " echoes " of giant pulses from the Crab pulsar. These echo events remind us of previously reported echoes from this pulsar, but they differ significantly in detail. Our echo events last at most only a few days; the echo emission lags the primary emission by only 40−100 µs. The echoes are consistently weaker and broader than the primary emission, and app...
متن کاملStatistical properties of giant pulses from the Crab pulsar
Aims. We have studied the statistics of giant pulses from the Crab pulsar for the first time with particular reference to their widths. Methods. We have analyzed data collected during 3.5 hours of observations conducted with the Westerbork Synthesis Radio Telescope operated in a tied-array mode at a frequency of 1200 MHz. The PuMa pulsar backend provided voltage recording of X and Y linear pola...
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Apart from its regular pulses, the Crab pulsar represents also a known source of apparently aperiodic giant pulse (GP) emission. The amplitudes of GPs exceed those of the regular pulses by a factor of at least 1000, and their widths range from nanoto microseconds, appearing spontaneously at random pulse phases. Ideas have been put forward that the GPs originate from reconnection zones near the ...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1999
ISSN: 0004-637X,1538-4357
DOI: 10.1086/307183