{
  "createdOn": 1735577692814,
  "format": "text/plain",
  "body": "A. S. Moskvitin, O. I. Spiridonova (SAO RAS), A. S. Pozanenko (IKI RAS)\nreport on behalf of the GRB follow-up team.\n\nWe partially covered the error circle of SVOM/ECLAIRs GRB 241229A\n(Liang et al., GCN 38697) with the 1-m telescope of SAO RAS, Zeiss-1000\nequipped with the CCD-photometer. We obtained 6 x 300 sec. images\nin Rc band on 2024-12-29T23:40:01--2024-12-30T00:16:47\n(t_mid - T0 = 23.9 hours).\n\nWithin the enhanced XRT position (Williams et al., GCN 38728)\nof X-ray candidate previously reported by Evans (GCN 38711) and\nJiang et al. (GCN 38726, EP-FXT candidate #2) we did not detect any new\nsource down to the limiting magnitude of R_lim = 22.3.\n\nWe should note the presence of the nearby galaxy J125129.26+314455.4\nvisible in archive images with the brightness of R2 = 20.39 (USNO-B1)\nand r = 20.402 +/- 0.043 (SDSS). In our stacked frame we measured\nthe brightness of the galaxy as R = 20.26 +/- 0.05 (diameter\nof aperture 9\".94, calibrated against R2 magnitudes of nearby USNO-B1\nstars). The angular distance from EP candidate position\nto the measured center of the galaxy is 2\".5 (corresponding 18 kpc,\nz_phot = 0.2875, H0 = 72 km/s/Mpc), and 6\".7 (47 kpc)\nfrom XRT position to the galaxy.\n",
  "circularId": 38731,
  "bibcode": "2024GCN.38731....1M",
  "submitter": "Moskvitin Alexander at SAO RAS <mosk@sao.ru>",
  "subject": "GRB 241229A: SAO RAS optical observations",
  "submittedHow": "web",
  "eventId": "GRB 241229A"
}