{
  "bibcode": "2015GCN.18690....1R",
  "body": "A. Rowlinson (UvA, ASTRON), J. Broderick (ASTRON), P.G. Jonker\n(SRON/RU), R.P. Fender (Oxford), R.A.M.J. Wijers (UvA), B.W. Stappers\n(Manchester) report on behalf of the LOFAR Transients Key Science\nproject\n\nOn Dec 14, 2015, starting at 02.00 (UTC), we observed a large fraction\nof the localization error range at declinations larger than 0 degrees\nof the Advanced LIGO trigger G184098 with the ILT (International\nLow-Frequency Array [LOFAR] Telescope). This is the final set of LOFAR\nobservations of these fields, our other two runs were completed on\nSept 21, 2015 (GCN 18364) and Oct 16, 2015 (GCN 18424). The\nobservations were obtained with the High-Band Antennas (HBA) at a\ncentre frequency of 145 MHz (bandwidth 11.9 MHz). In this\nconfiguration, the ILT can provide 8 simultaneous beams on the sky,\nwhere each beam has a field of view of approximately 12 deg^2 (beam\nFWHM 3.9 degrees). The beam centres are given below:\n\n1) 132.500000 5.166667 08:50:00.00 +05:10:00.0\n2) 135.287125 5.166667 09:01:08.91 +05:10:00.0\n3) 129.712875 5.166667 08:38:51.09 +05:10:00.0\n4) 131.106458 7.572944 08:44:25.55 +07:34:22.6\n5) 131.106458 2.760389 08:44:25.55 +02:45:37.4\n6) 133.893542 7.572944 08:55:34.45 +07:34:22.6\n7) 133.893542 2.760389 08:55:34.45 +02:45:37.4\n8) 128.319333 2.760389 08:33:16.64 +02:45:37.4\n\nThe observations cover roughly 50 square degrees in total.  Each field\nwas observed for a total of 3.7 hr with 10s time resolution after\npre-processing.\n\nAnalysis is ongoing.",
  "circularId": 18690,
  "createdOn": 1450112055000,
  "email": "b.a.rowlinson@uva.nl",
  "eventId": "LIGO/Virgo G184098",
  "subject": "LIGO/Virgo G184098: LOFAR follow-up",
  "submitter": "Antonia Rowlinson at U van Amsterdam  <b.a.rowlinson@uva.nl>"
}