{
  "subject": "GRB 240828A: SAO RAS AS-500(2) optical observations",
  "bibcode": "2024GCN.37370....1M",
  "submitter": "Moskvitin Alexander at SAO RAS <mosk@sao.ru>",
  "circularId": 37370,
  "eventId": "GRB 240828A",
  "submittedHow": "email-legacy",
  "body": "A. S. Moskvitin and V. V. Vlasyuk (SAO RAS),\nreport on behalf of the GRB follow-up team.\n\nWe observed the field of GRB 240828A (Fermi GBM team, GCN 37317;\nSrijan et al., GCN 37328; Gupta and Di Lalla, GCN 37331;\nBeardmore et al., GCN 37337; Dalessi and Meegan GCN 37341)\nwith the AS-500(2) 0.5-m Ritchey-Chretien telescope of SAO RAS\nequipped with CCD-photometer and Andor iXon Ultra EM-CCD DU-897\ncamera with 512x512 pixels E2V chip. We obtained 40 x 90 sec. images\nin Rc band on August 31 (2024-08-31T18:44:29 -- 2024-08-31T19:59:08),\nt_mid - T0 = 3.1852 days.\n\nThe OT (Zheng and Filippenko, GCNs 37339, 37349; Moskvitin\nand Spiridonova, GCN 37344) is marginally detected in our stacked\nframe with the brightness of R = 21.8 +/- 0.3 calibrated against\nnearby SDSS stars (magnitudes converted with Lupton 2005 equations)\nand not corrected for the MW extinction.\n",
  "createdOn": 1725224737798
}