{
  "createdOn": 1690214082949,
  "eventId": "GRB 230723B",
  "bibcode": "2023GCN.34250....1Q",
  "circularId": 34250,
  "subject": "GRB 230723B: Bassano Bresciano Observatory upper limit",
  "submitter": "Ulisse Quadri at Bassano Bresciano Obs <oabb@ulisse.bs.it>",
  "body": "U.Quadri and  L.Strabla (Bassano Bresciano Astronomical Observatory),\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 imaged the field of GRB 230723B detected by SWIFT(trigger 1180410)\nwith the robotic telescope of (IAU station 565) Bassano Bresciano \nObservatory, Italy. Member of: \nAAVSO - American Association of Variable Star Observers.\nUAI/SSV - Unione Astrofili Italiani/sezione stelle variabili.\nGAC - Gruppo Astrofili Cremonesi.\n\nThe observations started 518 min after the GRB trigger, at the end of twilight, \nwith our Newton telescope D=250 mm F/D=4.8.\n\nWeather conditions were medium.\n\nWe co-added 70 exposures of 120 sec each.\n\nStart T0+      End T0+       R lim\n518.43 min   598.40 min      19\n\nWe did not found any optical counterpart in the error box of the XRTcandidate.\nPage et al. GCN 34234\n\nMagnitudes were estimated with the Gaia DR2 cat. and \nare not corrected for galactic dust extinction.\n\nReference:\nhttp://www.osservatoriobassano.org/GRB.asp\n\nThe message may be cited.\n\n\n"
}