Query : 2012A&A...538A...7K

2012A&A...538A...7K - Astronomy and Astrophysics, volume 538A, 7-7 (2012/2-1)

Crab giant pulses at low frequencies.


Abstract (from CDS):

We report observations of the Crab pulsar at frequencies in the range of 110-180MHz. The combination of coherent dedispersion and the narrow synthesised beam of the Westerbork Synthesis Radio Telescope resulted in a sensitive observation. Our improved sensitivity and resolution allow us to confirm the presence of a precursor to the interpulse at these frequencies. We also detected more than 1000 giant pulses and find that the interpulse precursor component shows no giant pulse emission. Therefore, we attribute it to a similar emission source as the precursor to the mainpulse. Together these precursors might be the normal emission seen from the majority of radio pulsars. From the dispersion-free giant pulses, we find that the emission rate is ∼10-20x10–3s–1 and the scatter timescale in the range of ∼1.5-5.6ms. We further find that the radio flux of the pulsar is 6-11Jy in this frequency range.

Abstract Copyright:

Journal keyword(s): radiation mechanisms: non-thermal - scattering

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 M 1 SNR 05 34 30.9 +22 00 53           ~ 6096 1
2 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5173 0
3 PSR J1824-2452A Psr 18 24 32.009 -24 52 11.10           ~ 487 2
4 PSR B1937+21 Psr 19 39 39.6 +21 37 22           ~ 1046 2

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