{
  "submittedHow": "web",
  "eventId": "GRB 230816A",
  "bibcode": "2023GCN.34469....1R",
  "submitter": "Nello Ruocco at Osservatorio Nastro Verde - Sorrento (Naples) - Italy - MPC Code C82 <osservatorionastroverde@gmail.com>",
  "subject": " GRB 230816A: Osservatorio Astronomico \"Nastro Verde\" optical observations",
  "body": "Nello Ruocco at Osservatorio Nastro Verde - Sorrento (Naples) - Italy\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 observed the field of GRB 230816A (Siegel et al., GCN 34450) with telescope of Nastro Verde Observatory - Sorrento (Naples), Italy.\nMember of: \nAAVSO - American Association of Variable Star Observers.\nUAI/SSV - Unione Astrofili Italiani/sezione stelle variabili.\nAstroCampania Associazione\n\nThe observations started at 18:55 UT of 2023/08/16, after about 2,45 hours after the GRB trigger, at the end of twilight with clear skies, with principal telescope  SC 0.35 f/10 with focal reduced + CCD Sbig ST10 XME\nI took 25 image of 240 sec each. All images are unfiltered, calibrated with masterdark and masterflat,stacked with Tycho Tracker software\nWe have detected a faint  source of magnitude 19.1 G at the enhanced position reported by Swift-XRT (Siegel et al., GCN 34450, P.A. Evans et al., GCN 34462) and by optical telescopes ( A. S. Moskvitin et al GCN 34456., N. Pankov et al GCN 34457., Mohammad Odeh et al GCN 34458., S. Klose et al GCN 34459., R. Kumar et al GCN 34460)\nat following position\n\nRA      (J2000.0)  21h 53m 46.87s \nDecl.   (J2000.0) +37° 51' 14.7\"  \n\nPhotometry and astrometry on stack of 13 images each of 240 sec\n\nGRB 230816A KC2023 08 16.88481 21 53 46.87 +37 51 14.7          19.1 G      C82    \n \n\n\n\nMagnitudes were estimated with the GAIA DR2 cat. and \nare not corrected for galactic dust extinction.\n\n\n\nThe message may be cited.",
  "createdOn": 1692301864506,
  "circularId": 34469
}