{
  "bibcode": "2015GCN.18735....1C",
  "body": "K. C. Chambers, A. Schulz (IfA, University of Hawaii), D. Young, K. Smith, \nS. Smartt (Queen���s University Belfast),  M. Coughlin (Harvard), L. Denneau, \nH. Flewelling, A. Heinze, M. E. Huber, E. A. Magnier, N. Primak, A. Rest (STScI),  \nA. Sherstyuk (IfA), B. Stalder (IfA), C. W. Stubbs (Harvard) J. Tonry, \nC. Waters (IfA), D. Wright, (QUB)\n\nWe report the observations of northern arc of the skymap defined by the \nBAYESTAR pipeline as reported GCN18728  with the Pan-STARRS1 telescope\n(2.9 degree diameter FOV). \n\nWe have mapped the arc from the southern point of RA=34.1174 DEC=10.129 \nthrough to the northern tip at RA=86.394 DEC=53.6, corresponding \nto most of the 30% enclosed region in the northern arc of the BAYESTAR map. \n\nObservations were taken in the PS1 i-band (Tonry et al. 2012, ApJ 750, 99)\nand at each pointing position a dithered sequence of 4 x 45 sec was taken, \nwhich will be combined as a single epoch stack. These dithered sequences\nwere repeated, with overlaps, to map the 30% region contiguously.  \nA total of 371 individual 45 sec images were taken. \n\nData taking began at  2015-12-28 05:07:49 and finished 2015-12-28 13:33:07\n(UTC). \n\nThe images are currently being differenced with respect to the Pan-STARRS\n3Pi all sky i-band image (see Magnier et al. 2013, ApJS 205, 20 ; \nHuber et al. 2015,  ATel 7153) to detect transient objects. Further observations\nof the region are planned as weather allows.",
  "circularId": 18735,
  "createdOn": 1451318720000,
  "email": "s.smartt@qub.ac.uk",
  "subject": "LIGO/Virgo G211117: Pan-STARRS1 observations 2015-12-28",
  "submitter": "S. J. Smartt at Queens U Belfast  <s.smartt@qub.ac.uk>",
  "eventId": "LIGO/Virgo G211117"
}