{
  "bibcode": "2008GCN..8212....1H",
  "body": "J. Hessels (Univ. of Amsterdam), N. Rea (Univ. of Amsterdam), S. Ransom\n(NRAO), B. Stappers (Univ. of Manchester), & collaborators\n\n\nOn 2008 August 23 14:53 (UT) we observed the recently discovered Soft\nGamma-Ray Repeater SGR J0501+4516 (GCN 8112, 8113) with the Green Bank\nTelescope (GBT) for about 1 hour, using the Pulsar Spigot at 2 GHz.\n\nFolding the data at the X-ray rotational period of 5.769s (ATEL 1677)\nrevealed no radio pulsations over a wide range of trial dispersion measures\n(DMs).  We place an upper limit of 40microJy on a putative radio pulsar at\nthis epoch, consistent with synthesis upper limits on the radio counterpart\nfrom earlier that day (GCN 8125).  We have also searched a large range of\nDMs for individual bright pulses and bursts. No obvious radio bursts were\nfound down to a time resolution of 3ms and a maximum DM of 1000 pc/cm^3.\n\nNote that during our observation Swift-BAT observed a large burst (on 2008\nAugust 23 14:56:26 UT; ATEL 1678) for which no obvious radio counterpart was\ndetected.\n\nWe are continuing to analyze these data to search for fainter signals.\n\nWesterbork observations are planned starting on 2008 August 26 03:00 (UT) to\nsearch for pulsations from the recently reported VLA radio counterpart (GCN\n8130).\nA GBT ToO monitoring program to search for radio pulsations has been\nrequested.\n\nWe would like to thank the GBT schedulers for their prompt attention to our\nrequest for observations.",
  "circularId": 8212,
  "createdOn": 1221083736000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "SGR J0501+4516: radio pulsar searches with GBT and WSRT",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>",
  "eventId": "SGR J0501+4516"
}