{
  "bibcode": "2015GCN.18085....1M",
  "body": "A. Martin-Carrillo (UCD), D. Murphy (UCD), L. Hanlon (UCD), M. Topinka (CTU), H. J. van Heerden (UFS), B. van Soelen (UFS) and P. J. Meintjes (UFS):\n\nWe observed the field of GRB 150727A (Cenko et al., GCN Circ. #18076) using the 40cm UCD Watcher telescope at Boyden Observatory in South Africa. \n\nObservations started at 19:19:55 UT, 1073 seconds after the burst trigger. A series of 60 sec images were taken in the SDSS r' filter using an Andor CCD camera. \nNo afterglow candidate is detected in any of the individual images at the UVOT location. A 3sigma upper limit for a combined 180 second exposure is given below.\n\nStart             | End              | Exposure | Filter | Magnitude\n-------------------------------------------------------------------------------------------------\n19:19:55 UT | 19:25:20 UT | 3x60 sec |  r'       |  >17.59 (3sigma upper limit)\n\nThe upper limit was calculated using nearby stars from the APASS catalogue.\n\nThis message can be cited in publications.",
  "circularId": 18085,
  "createdOn": 1438079986000,
  "email": "antonio.martin-carrillo@ucd.ie",
  "subject": "GRB 150727A: Watcher optical upper limit",
  "submitter": "Antonio Martin-Carrillo at UCD,Space Science Group  <antonio.martin-carrillo@ucd.ie>",
  "eventId": "GRB 150727A"
}