{
  "createdOn": 1728413017812,
  "eventId": "EP240930a",
  "body": " A. Vonova (IKI), V. Rumyantsev (CrAO), A. Pozanenko (IKI), N. Pankov (HSE,\nIKI), and S. Belkin (IKI) report on behalf of the GRB-IKI-FuN collaboration:\n\nWe observed EP240930a, detected by EP-WXT (Tian et al., GCN 37648) and FXT\n(Peng et al., GCN 37653), and triangulated by IPN (Kozyrev et al., GCN\n37696), using the 2.6-meter ZTSh telescope of CrAO, equipped with a CCD\nphotometer and an R-filter. The observations started on 2024-10-01 (UT)\n16:48:01.\n\nWe did not detect any new optical object within the FXT (Peng et al., GCN\n37653) localization area in comparison with DSS2. The preliminary\nphotometry is as follows:\n\nDate UT start t-T0                    Exp. Filter OT Err. UL(3sigma)\n                       (mid, days) (s)\n\n2024-10-01 16:48:01 0.98182 46x120 R n/d n/d 23.6\n\nThis result is in agreement with previous reports (Kumar et al., GCN 37651;\nZheng et al., GCN 37656; Bochenek et al., GCN 37682; SVOM/C-GFT team, GCN\n37720). The magnitudes were calibrated using nearby USNO-B1.0 stars (R2\nmagnitude). No correction has been made for Galactic extinction toward\nEP240930a\n",
  "bibcode": "2024GCN.37737....1V",
  "circularId": 37737,
  "subject": "EP240930a / GRB 240930B: CrAO ZTSH optical upper limit",
  "submittedHow": "email-legacy",
  "submitter": "Alexei Pozanenko at IKI, Moscow <grb.alex@gmail.com>"
}