{
  "circularId": 34430,
  "body": "U.Quadri and  L.Strabla (Bassano Bresciano Astronomical Observatory),\n\nMembers of: \nAAVSO - American Association of Variable Star Observers.\nUAI/SSV - Unione Astrofili Italiani/sezione stelle variabili-GRB.\nGAC - Gruppo Astrofili Cremonesi.\n\nIn a large collaboration with:\nM.G. Dainotti (National Astronomical Observatory of Japan), \nY. Niino (Tokyo University, Institute of Astronomy), \nK. Kalinowski (Aarhus University, Department of Physics and Astronomy),\nB. De Simone (Universita' degli Studi Di Salerno)\nreport: \n\nWe re-observed the field of GRB 230812B (Lesage et al., GCN 34387;\nScotton et al., GCN 34392; Page, GCN 34394; Zheng & Filippenko, GCN\n34395; Lipunov et al., GCN 34396; Salgundi et al., GCN 34397; Ackley\net al., GCN 34398; Xiong et al., GCN 34401; Casentini et al., GCN\n34002; Frederiks et al., GCN 34403; Mao et al., GCN 34404; Odeh et\nal., GCN 34405; Moskvitin & Spiridonova GCN 34406; Leonini et al. GCN\n34408; de Ugarte Postigo et al. GCN 34409; de Ugarte Postigo et al.\nGCN 34410; Belkin et al. GCN 34412; Ruocco et al. GCN 34413; Frederiks\net al. GCN 34414; Ruocco et al. GCN 34415; Shrestha et al. GCN 34416;\nQuadri et al. GCN 34417; Adami et al. GCN 34418; Moretti et al. GCN\n34419; Kumar et al. GCN 34420; Belkin et al. GCN 34421 & GCN 34423;\nPyshna et al., GCN 34425) with our 0.25-m Newton robotic telescope.\n\nWe coadded 155 x 60 sec. unfiltered images on August 14 2023, \nfrom 19:46:11 to 22:32:27 UT\n\nWe confirm a fading afterglow at the following coordinates +/- 0.2 arcsec:\n\nRA (J2000.0) =  16h 36m 31.51s\nDEC(J2000.0) = +47d 51p 32.2s\n\nThe results of OT photometry are:\n\n-----------------------------------\n      JD         mag      Err   Flt   \n-----------------------------------\n2460171.43558   20.5  +/- 0.3   CR    \n    \n\nCR is unfiltered with Rc zero point.\n\nMagnitudes were estimated with the Pan-STARRS cat. \nand are converted using Lupton (2005) equations.\n\nNot corrected for galactic dust extinction.\n\nReference:\nhttp://www.osservatoriobassano.org/GRB.asp\n\nThe message may be cited.\n\n\n",
  "submittedHow": "email-legacy",
  "eventId": "GRB 230812B",
  "bibcode": "2023GCN.34430....1Q",
  "createdOn": 1692091126325,
  "subject": "GRB 230812B: Further Bassano Bresciano Observatory optical observations",
  "submitter": "Ulisse Quadri at Bassano Bresciano Obs <oabb@ulisse.bs.it>"
}