{
  "eventId": "GRB 230824A",
  "createdOn": 1693132823697,
  "body": "E. Pavoni and L. Moretti (Leavitt Observatory, Italy), in 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 (Università degli Studi Di Salerno)\nreport: \n\nWe observed the field of Swift J1727.8-1613 (GRB 230824A: Page et al., GCN 34537; Navaneeth et al., GCN 34538, Odeh et al., GCN 34543; U.Quadri et al., GCN 34562; C. Lopresti, GCN 34566) with the telescope of Leavitt Observatory, Italy. Member of: \n\nUAI/SSV - Unione Astrofili Italiani/sezione stelle variabili, GRB section.\nATA - Associazione Tuscolana di Astronomia.\n\nThe observations began at 20:02 UT on 2023/08/24 (~6 hours after the Swift trigger), with our RC telescope D=250 mm F/D=8.\n\nWeather conditions were good.\n\nWe took 25 images of 120 sec each. All images are Rc filtered, calibrated with master dark and master flat, stacked with ASTAP software and analyzed with AstroImageJ software.\n\nWe clearly detected a bright object, in the same location as M.Odeh et al., GCN 34543, within the uncertainty radius of the Swift localization, at:\n\nR.A. (J2000): 17:27:43.32\nDec. (J2000): -16:12:18.8\n\nThe results of our photometry in Rc band are:\n\nJD_UTC\t\t\t        Source_Mag\tSource_Mag_Err\n2460181.3385997\t\t13,766\t\t         0,006\t\t\t\n2460181.3457458\t\t13,725\t\t         0,006\t\t\t\n2460181.3528939\t\t13,731\t\t         0,006\n2460181.3603810\t\t13,694\t\t         0,006\n2460181.3689481\t\t13,671\t\t         0,005\n\nMagnitudes were estimated with PanSTARRS cat. and are not corrected for galactic dust extinction.\n\nThe message may be cited.",
  "submitter": "leavittob@gmail.com",
  "subject": "Swift J1727.8-1613 (GRB 230824A): Leavitt Observatory optical observations",
  "submittedHow": "web",
  "bibcode": "2023GCN.34570....1P",
  "circularId": 34570
}