{
  "bibcode": "2019GCN.25705....1P",
  "body": "G. Piano, C. Casentini (INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma\nTor Vergata), M. Cardillo, A. Ursi (INAF/IAPS), F. Lucarelli, C. Pittori,\nF. Verrecchia (SSDC, and INAF/OAR), A. Bulgarelli, V. Fioretti, N.\nParmiggiani (INAF/OAS-Bologna), M. Pilia (INAF/OA-Cagliari), F. Longo\n(Univ. Trieste, and INFN Trieste),\nreport on behalf of the AGILE Team:\n\nIn response to the LIGO-Virgo GW event S190910d at T0 = 2019-09-10\n01:26:19.243 UTC a preliminary analysis of the AGILE exposure at T0 shows\nthat the Gamma-Ray Imaging Detector (GRID) exposure covered the 11% of the\n90% c.l. localization region (LR) (19% of 90% c.l. localization region (LR)\nis occulted by Earth).\n\nWe performed an analysis of the GRID data in the energy range 50 MeV - 10\nGeV on T0.\n\nNo candidate gamma-ray transient was detected.\n\nThe following preliminary GRID values of 3-sigma upper limit (UL) are\nobtained:\n\n- from 7.5e-07 to 4.0e-06 erg cm^-2 s^-1, with exposure of about 11% of the\nLR over the time interval (T0 - 2 s; T0 + 2 s);\n- from 6.1e-07 to 3.2e-06 erg cm^-2 s^-1, with exposure of about 11% of the\nLR over the time interval (T0; T0 + 5 s);\n- from 3.1e-07 to 2.3e-06 erg cm^-2 s^-1, with exposure of about 11% of the\nLR over the time interval (T0; T0 + 10 s);\n- from 1.1e-07 to 1.6e-06 erg cm^-2 s^-1, with exposure of about 21% of the\nLR over the time interval (T0; T0 + 100 s).\n\nThese measurements were obtained with AGILE observing a large portion of\nthe sky in spinning mode. Additional analysis of AGILE data is in progress.",
  "circularId": 25705,
  "createdOn": 1568103837000,
  "email": "giovanni.piano@inaf.it",
  "subject": "LIGO/Virgo S190910d: no counterpart candidates in AGILE-GRID observations",
  "submitter": "Giovanni Piano at INAF-IAPS  <giovanni.piano@inaf.it>",
  "eventId": "LIGO/Virgo S190910d"
}