{
  "circularId": 34516,
  "submitter": "Moskvitin Alexander at SAO RAS <mosk@sao.ru>",
  "bibcode": "2023GCN.34516....1M",
  "subject": "GRB 230812B: SAO RAS RC-500 and Zeiss-1000 observations",
  "eventId": "GRB 230812B",
  "createdOn": 1692647922248,
  "body": "A. S. Moskvitin, V. V. Vlasyuk (SAO RAS), V. P. Goranskij (SAI MSU),\nreport on behalf of the GRB follow-up team.\n\nWe observed the field of GRB 230812B (Fermi GBM Team, GCN 34386;\nScotton et al., GCN 34392; Page et al. GCN 34394; Kuin et al.,\nGCN 34399; Casentini et al., GCN 34402) with the SAO RAS optical\ntelescopes RC-500 and Zeiss-1000 equipped with the CCD photometers.\nWe obtained 90 x 60 sec. images in Rc band with the 0.5-m telescope\non August 20, 18:36:51--20:27:56 and 6 x 300 sec. images in Rc band\nwith the 1-m telescope on August 20, 21:09:05--21:43:00 UT.\n\nThe OT (Lesage et al., GCN 34387; Scotton et al., GCN 34392; Page,\nGCN 34394; Zheng & Filippenko, GCN 34395; Lipunov et al., GCN 34396;\nSalgundi et al., GCN 34397; Ackley et al., GCN 34398; Xiong et al.,\nGCN 34401; Casentini et al., GCN 34402; Frederiks et al., GCN 34403;\nMao et al., GCN 34404; Odeh et al., GCN 34405; Moskvitin & Spiridonova,\nGCN 34406; Leonini et al., GCN 34408; de Ugarte Postigo et al.,\nGCNs 24409, 34410; Belkin et al. GCN 34412; Ruocco et al. GCN 34413;\nFrederiks et al. GCN 34414; Ruocco et al. GCN 34415; Shrestha et al.\nGCN 34416; Quadri et al. GCN 34417; Adami et al. GCN 34418;\nMoretti et al. GCN 34419; Kumar et al. GCN 34420; Belkin et al. GCNs\n34421, GCN 34423; Pyshna et al., GCN 34425; Moskvitin & Spiridonova,\nGCN 34428; Quadri & Strabla, GCN 34430; Mihov et al., GCN 34431;\nBelkin et al. GCN 34432; Klose et al., GCN 34435; Scarfi, GCN 34436;\nMoskvitin & Spiridonova, GCNs 34442, 34461, 34471, 34475;\nVinko et al., GCN 34463; H. Kumar et al., GCN 34500; Turpin et al.,\nGCN 34508) is clearly detected in our stacked frames\nwith the brightness of R = 21.58 +/- 0.11 (t_mid - t0 = 8.0237 days)\nand R = 21.44 +/- 0.07 (t_mid - t0 = 8.1027 days).\n\nThis preliminary photometry is based on the nearby SDSS stars;\nmagnitudes are converted using Lupton (2005) equations.\n\n",
  "submittedHow": "email-legacy"
}