{
  "bibcode": "2021GCN.30361....1S",
  "body": "I.A. Smith (Rice U.), D.A. Perley (LJMU), and N.R. Tanvir \n(U. of Leicester) report:\n\nWe observed the Swift UVOT location of GRB 210619B (D'Avanzo \net al., GCN Circ. 30261) using the SCUBA-2 sub-millimeter \ncontinuum camera on the James Clerk Maxwell Telescope.  \nObservations totaling 2.1 hours were obtained on UT 2021-06-20 and\n2021-06-21 in average and poor weather conditions respectively.\nNo counterpart was detected in the individual or combined maps.\nCombining all the data, the RMS background noise was 1.61 mJy/beam \nat 850 microns and 27.9 mJy/beam at 450 microns; the mid-point of \nthe run was 1.07 days after the burst trigger.  \n\nWe thank Patrice Smith, Mark Rawlings, Harriet Parsons, and the \nJCMT staff for the prompt support of these observations that were \ntaken under project M21AP020.",
  "circularId": 30361,
  "createdOn": 1625302749000,
  "email": "ian.smith.astronomy@gmail.com",
  "subject": "GRB 210619B: JCMT SCUBA-2 sub-mm observations",
  "submitter": "Ian Smith at Rice U  <ian.smith.astronomy@gmail.com>",
  "eventId": "GRB 210619B"
}