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Title:
No Detectable Radio Emission from the Magnetar-Like Pulsar in Kes 75
Authors:
Archibald, Anne M.; Kaspi, Victoria M.; Livingstone, Margaret A.; McLaughlin, Maura A.
Affiliation:
AA(Department of Physics, McGill University, 3600 University Street, Montreal, QC H3A 2T8, Canada; .), AB(Department of Physics, McGill University, 3600 University Street, Montreal, QC H3A 2T8, Canada; .), AC(Department of Physics, McGill University, 3600 University Street, Montreal, QC H3A 2T8, Canada; .), AD(Department of Physics, West Virginia University, Morgantown, WV 26505.)
Publication:
The Astrophysical Journal, Volume 688, Issue 1, pp. 550-554. (ApJ Homepage)
Publication Date:
11/2008
Origin:
UCP
ApJ Keywords:
Stars: Pulsars: Individual: Alphanumeric: PSR J1846-0258, pulsars: individual (RRAT J1846-02)
DOI:
10.1086/591661
Bibliographic Code:
2008ApJ...688..550A

Abstract

The rotation-powered pulsar PSR J1846-0258 in the supernova remnant Kes 75 was recently shown to have exhibited magnetar-like X-ray bursts in mid-2006. Radio emission has not yet been observed from this source, but other magnetar-like sources have exhibited transient radio emission following X-ray bursts. We report on a deep 1.9 GHz radio observation of PSR J1846-0258 with the 100 m Green Bank Telescope in late 2007, designed to search for radio pulsations or bursts from this target. We have also analyzed three shorter serendipitous 1.4 GHz radio observations of the source taken with the 64 m Parkes telescope during the 2006 bursting period. We detected no radio emission from PSR J1846-0258 in either the Green Bank or Parkes data sets. We place an upper limit of 4.9 μJy on coherent pulsed emission from PSR J1846-0258 based on the 2007 November 2 observation, and an upper limit of 27 μJy around the time of the X-ray bursts. Serendipitously, we observed radio pulses from the nearby RRAT J1846-02, and place a 3 σ confidence level upper limit on its period derivative of 1.7×10-13, implying its surface dipole magnetic field is less than 2.6×1013 G.
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