{
  "bibcode": "2002GCN..1437....1K",
  "body": "V. M. Kaspi (McGill/MIT), F. P. Gavriil (McGill) and P. M.\nWoods (USRA/NSSTC), following the discovery of brief X-ray bursts\nfrom the direction of the anomalous X-ray pulsar 1E 2259+586 (IAUC\n7924, GCN 1432) on June 18, 2002, report now on further analysis of the same\nRXTE/PCA data.  We find that the pulsed flux declined monotonically by\na factor of 4 over the 15 ks in which the bursts were detected, in\nconcert with the decreasing burst rate over the same interval.  In\naddition, the pulse profile during the 15 ks was significantly\ndifferent than the long-term average profile, an effect not seen in 5.8\nyr of prior RXTE monitoring.  Specifically, the relative amplitudes of\nthe two peaks in the profile were reversed, and the bridge of emission\nusually present between them decreased in amplitude.  These two\nobservations independently demonstrate that 1E 2259+586 is the origin\nof the bursts.  This solidifies the common nature of anomalous X-ray pulsars\nand soft gamma repeaters.  Bursting in anomalous X-ray pulsars was\npredicted in the magnetar model by Thompson & Duncan (1996; ApJ, 473,\n322).  We provide figures including lightcurves, the pulsed flux evolution, \nand pulse profiles both during the burst epoch and the long-term burst\nfree average, at the following URL: \n\nhttp://www.physics.mcgill.ca/~vkaspi/1E2259+586/bursts.html",
  "circularId": 1437,
  "createdOn": 1024718683000,
  "email": "vkaspi@physics.mcgill.ca",
  "subject": "SGR-like X-ray Bursts from AXP 1E 2259+586: follow-up",
  "submitter": "Victoria M. Kaspi at McGill U/Physics  <vkaspi@physics.mcgill.ca>"
}