{
  "bibcode": "2021GCN.30292....1R",
  "body": "I observed the field of GRB 210619B (D'Avanzo et al., GCN Circ. 30261)\nusing remote telescope T18 (0.32-m f/8.0 reflector + CCD) of\niTelescope.Net in observatory AstroCamp at Nerpio (Spain). Five images\n(with exposures 300 seconds, BINx1) were obtained with Astrodon\nluminance filter on 2021-06-20 from 23:06:46 to 23:36:44 UTC (until\nthe roof was closed due to poor weather).\n\nI detected faint (SNR ~ 3) optical afterglow with UVOT position in\nstacked image (mid time = 23:21:43 UTC, that is 0.974 days after the\ntrigger) and measured its magnitude from comparison to r' magnitudes\nof nearby stars from Pan-STARRS DR1 catalogue (Chambers et al., 2016):\n20.5 +/- 0.4. Magnitude was not corrected for Galactic extinction.\n\nStacked image available here:\nhttps://www.flickr.com/photos/filipp-romanov/51261591951",
  "circularId": 30292,
  "createdOn": 1624284485000,
  "email": "filipp.romanov.27.04.1997@gmail.com",
  "subject": "GRB 210619B: iTelescope optical afterglow observation",
  "submitter": "Filipp Dmitrievich Romanov at Amateur astronomer  <filipp.romanov.27.04.1997@gmail.com>",
  "eventId": "GRB 210619B"
}