{
  "bibcode": "2011GCN.11884....1M",
  "body": "ICSP VLF observation of multiple SGR-like bursts from 1E 1841-045 on Feb. 9, 2011\n\nSushanta K. Mondal (ICSP), Sandip K. Chakrabarti (S. N. Bose Centre and ICSP),\nDebashis Bhowmick (ICSP)\n\nWe observed several sudden ionospheric disturbances on Feb. 9th, 2011 in signals\ntransmitted from several stations. One of them (occurring at 05:14:26 UT)\ncoincided\nexactly with the observed time of Fermi (GCN #11684) but there\nwere many both before and after within a few hundred seconds. All these events\nwere observed in both phase and amplitude, indicating that the disturbances\nwere real.\nOne image of the amplitude/phase from various transmitting stations as\nobtained by our\nreceiver at Sitapur station is in http://www.bose.res.in/~chakraba/gbm090211.html.\nThe entire set of events were riding on a 'B' type flare, but we suspect our\nevents are\nnot parts of any solar flare, as the time durations of the signals involved appear\nto be too short (similar to our GRB090424 for our VLF signal; see GCN No.11883)\nSince GCN #11684 observes only one signal (corresponding to spikes at 18866s\nin our Figure), we request others to check if there were any observations at\nthe times when other VLF signals were seen.",
  "circularId": 11884,
  "createdOn": 1302006616000,
  "email": "chakraba@bose.res.in",
  "subject": "ICSP VLF observation of multiple SGR-like bursts from 1E 1841-045 on Feb. 9, 2011",
  "submitter": "Sandip K. Chakrabarti at S.N. Bose Nat. Centre for Basic Sci.  <chakraba@bose.res.in>"
}