{
  "bibcode": "2003GCN..2030....1B",
  "body": "C. Bartolini, A. Guarnieri, A. Piccioni (Bologna University), \nG. Gavazzi (Milano-Bicocca University), R. Gualandi (Bologna \nAstronomical Observatory), G. Pizzichini and P. Ferrero \n(IASF-CNR, Bologna) report:\n\nBy a preliminary reduction of four frames of our CCD UBVRI \nphotometry of GRB030329 (GCN n.2003), performed with the 152 cm \nLoiano telescope, we obtain:\n\n\n   mid exp.      filter     exposure time         mag  \n     UT                       (seconds)    \n   \nMar 29.7823        R            300           14.29 +/-.10\nMar 29.8556        R            180           14.55 +/-.03\n\nMar 29.7957        B            900           15.16 +/-.03\nMar 29.8493        B            300           15.38 +/-.03\n \nMagnitude values were referred to star A (Martini et al, GCN \n2012) as calibrated by Burenin et al. (GCN 2024). The \nuncertainties have the meaning of internal errors. \n\n\n\nThis message may be cited.",
  "circularId": 2030,
  "createdOn": 1049056268000,
  "email": "adriano@astbo3.bo.astro.it",
  "subject": "GRB030329: R and B observations",
  "submitter": "Adriano Guarnieri at O.A.di Bologna  <adriano@astbo3.bo.astro.it>",
  "eventId": "GRB 030329"
}