{
  "bibcode": "2008GCN..7585....1G",
  "body": "Gaug M., Garczarczyk M., Antonelli A., Bastieri D., Covino S., Galante N., \nLa Barbera A., Longo F. and Scapin V. for the MAGIC collaboration\n\nThe MAGIC Imaging Atmospheric Cherenkov Telescope performed a follow-up \nobservation of the BAT burst GRB080330 (GCN circular 7537, Mao et al.).\nWe received the GCN alert at 03:41:33 UT (T0+16s), data taking with MAGIC \nstarted at 03:42:47 UT (T0+91s), short after the prompt emission phase \nmeasured to be T90=61+/-9s. The observation was carried out at a zenith \nangle of 48 degrees. The observation continued for 1039s.\n\nNo evidence for VHE gamma-ray emission above the analysis threshold of\n313 GeV was found. The observation was carried out in (less sensitive) \nmoon-observation mode.\n\nA preliminary analysis, for the hypothesis of steady emission and \nassumption of a differential photon spectral index of -2.5, yields the \nfollowing 95% CL differential flux upper limits, including a 30% \nsystematic uncertainty on the telescope efficiency:\n\nE (175- 300 GeV): 0.36 * 10^-10 erg/cm^-2/s\nE (300-1000 GeV): 0.49 * 10^-10 erg/cm^-2/s\nfor a time window from 03:42:47 UT to 03:59:01 UT\n\nWe can also exclude emission of a constant flux in any 100s time bin \nsmaller than:\n\nE (175- 300 GeV): 8.42 * 10^-10 erg/cm^-2/s\nE (300-1000 GeV): 2.05 * 10^-10 erg/cm^-2/s\nfor a time window from 03:42:47 UT to 03:59:01 UT\n\nThis message can be cited.",
  "circularId": 7585,
  "createdOn": 1207957283000,
  "email": "garcz@mppmu.mpg.de",
  "subject": "GRB080330: MAGIC telescope GeV observation",
  "submitter": "Markus Garczarczyk at MPI/MAGIC  <garcz@mppmu.mpg.de>",
  "eventId": "GRB 080330"
}