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We report the detection and observed characteristics of giant pulses from the Crab Nebula pulsar (B0531+21) in four frequency bands covering 20-84 MHz using the recently-completed Long Wavelength Array Station 1 (LWA1) radio telescope. In…

High Energy Astrophysical Phenomena · Physics 2015-06-15 S. W. Ellingson , T. E. Clarke , J. Craig , B. C. Hicks , T. J. W. Lazio , G. B. Taylor , T. L. Wilson , C. N. Wolfe

We analyze the Crab pulsar at ten frequencies from 0.43 to 8.8 GHz using data obtained at the Arecibo Observatory. Giant pulses occur only in the main and interpulse components manifest from radio frequencies to gamma-ray energies.…

Astrophysics · Physics 2009-11-07 J. M. Cordes , N. D. R. Bhat , T. H. Hankins , M. A. McLaughlin , J. Kern

The Crab pulsar is well-known for its anomalous giant radio pulse emission. Past studies have concentrated only on the very bright pulses or were insensitive to the faint end of the giant pulse luminosity distribution. With our new…

Astrophysics of Galaxies · Physics 2015-05-18 R. Karuppusamy , B. W. Stappers , W. van Straten

We report observations of Crab giant pulses made with the Australia Telescope Compact Array and a baseband recorder system, made simultaneously at two frequencies, 1300 and 1470 MHz. These observations were sensitive to pulses with…

Astrophysics · Physics 2009-11-13 N. D. Ramesh Bhat , Steven J. Tingay , Haydon S. Knight

We report on simultaneous wideband observations of Crab giant pulses with the Parkes radio telescope and the Murchison Widefield Array (MWA). The observations were conducted simultaneously at 732 and 3100 MHz with Parkes, and at 120.96,…

High Energy Astrophysical Phenomena · Physics 2017-12-08 B. W. Meyers , S. E. Tremblay , N. D. R. Bhat , R. M. Shannon , F. Kirsten , M. Sokolowski , S. J. Tingay , S. I. Oronsaye , S. M. Ord

We present a large survey of giant pulses from the Crab Pulsar as observed with the first station of the Long Wavelength Array. Automated methods for detecting giant pulses at low frequencies where scattering becomes prevalent are also…

Solar and Stellar Astrophysics · Physics 2016-10-05 T. Eftekhari , K. Stovall , J. Dowell , F. K. Schinzel , G. B. Taylor

We report on observations of giant pulses from the Crab pulsar performed simultaneously with the Parkes radio telescope and the incoherent combination of the Murchison Widefield Array (MWA) antenna tiles. The observations were performed…

We analyzed four epochs of beamformed EVN data of the Crab Pulsar at 1658.49 MHz. With the high sensitivity resulting from resolving out the Crab Nebula, we are able to detect even the faint high-frequency components in the folded profile.…

High Energy Astrophysical Phenomena · Physics 2023-09-18 Rebecca Lin , Marten H. van Kerkwijk

We used a new spectral-fitting technique to identify a subpopulation of 6 narrow-band giant pulses from the Crab pulsar out of a total of 1578. These giant pulses were detected in 77 minutes of observations with the 46-m dish at the…

High Energy Astrophysical Phenomena · Physics 2021-09-29 Parasar Thulasiram , Hsiu-Hsien Lin

We have observed the Crab pulsar with the Deep Space Network (DSN) Goldstone 70 m antenna at 1664 MHz during three observing epochs for a total of 4 hours. Our data analysis has detected more than 2500 giant pulses, with flux densities…

Astrophysics of Galaxies · Physics 2015-05-30 Walid A. Majid , Charles J. Naudet , Stephen T. Lowe , Thomas B. H. Kuiper

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 1.4 GHz at the Very Large Array to trigger the observation of that same pulse at…

Astrophysics · Physics 2009-10-31 Shauna Sallmen , D. C. Backer , T. H. Hankins , D. Moffett , S. Lundgren

The Crab Pulsar's radio emission is unusual, consisting predominantly of giant pulses, with durations of about a micro-second but structure down to the nano-second level, and brightness temperatures of up to $10^{37}\,$K. It is unclear how…

The Crab Pulsar is the prime example of an emitter of giant pulses. These short, very bright pulses are thought to originate near the light cylinder, at $\sim\!1600{\rm\;km}$ from the pulsar. The pulsar's location inside the Crab Nebula…

High Energy Astrophysical Phenomena · Physics 2023-03-29 Rebecca Lin , Marten H. van Kerkwijk , Robert Main , Nikhil Mahajan , Ue-Li Pen , Franz Kirsten

We report on very long baseline interferometry (VLBI) observations of the radio emission from the inner region of the Crab Nebula, made at 1.6 GHz and 5 GHz after a recent high-energy flare in this object. The 5 GHz data have provided only…

High Energy Astrophysical Phenomena · Physics 2015-05-28 A. P. Lobanov , D. Horns , T. W. B. Muxlow

Radio giant pulses provide a unique opportunity to study the pulsar radio emission mechanism in exquisite detail. Previous studies have revealed a wide range of properties and phenomena, including extraordinarily high brightness…

High Energy Astrophysical Phenomena · Physics 2015-07-15 Glenn Jones

We have studied the statistics of giant pulses from the Crab pulsar for the first time with particular reference to their widths. We have analyzed data collected during 3.5 hours of observations conducted with the Westerbork Synthesis Radio…

Astrophysics · Physics 2009-11-13 M. V. Popov , B. Stappers

VLBI observations of the Crab pulsar with the 64-m radio telescope at Kalyazin (Russia) and the 46-m radio telescope of the Algonquin Radio Observatory (Canada) at 2.2 GHz and single-dish observations of the millisecond pulsar B1937+21 with…

Gamma radiation from the Crab pulsar wind nebula (PWN) shows significant variability at $\sim100$ MeV energies, recently revealed with spaceborne gamma-ray telescopes. Here we report the results of a systematic search for gamma-ray flares…

High Energy Astrophysical Phenomena · Physics 2020-07-08 Masanori Arakawa , Masaaki Hayashida , Dmitry Khangulyan , Yasunobu Uchiyama

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…

Astrophysics · Physics 2007-05-23 A. Jessner , A. Slowikowska , B. Klein , H. Lesch , C. H. Jaroschek , G. Kanbach , T. H. Hankins

We present the results of a pilot study search for Fast Radio Bursts (FRBs) using the Murchison Widefield Array (MWA) at low frequencies (139 - 170 MHz). We utilised MWA data obtained in a routine imaging mode from observations where the…

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