{
  "bibcode": "2019GCN.25515....1L",
  "body": "F. Longo (Univ. Trieste, and INFN Trieste), F. Verrecchia, C. Pittori\n(SSDC, and INAF/OAR), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata),\nM. Cardillo, C. Casentini, G. Piano, A. Ursi (INAF/IAPS), F. Lucarelli\n(SSDC, and INAF/OAR), A. Bulgarelli, V. Fioretti, N. Parmiggiani\n(INAF/OAS-Bologna), M. Pilia (INAF/OA-Cagliari), report on behalf of the\nAGILE Team:\n\nIn response to the LIGO-Virgo GW event S190828l at T0 = 2019-08-28\n06:55:09.887 UT a preliminary analysis of the AGILE exposure at T0 shows\nthat the Gamma-Ray Imaging Detector (GRID) exposure covered less than 10%\nof the 90% c.l. localization region (LR; around 40% of 90% c.l. LR is\nocculted by Earth).\n\nWe performed an analysis of the GRID data in the energy range 50 MeV -\n10 GeV over time intervals before and after T0, where good exposure of\nthe S190828l 90% c.l. LR was available.\n\nNo candidate gamma-ray transient was detected.\n\nThe following preliminary GRID values of 3-sigma upper limit (UL) are\nobtained:\n\nfrom 3e-08 to 2.e-07 erg cm^-2 s^-1, with exposure of about 50% of\nthe LR over the time interval ( T0 - 100s ; T0 + 0s );\nfrom 8e-08 to 7e-08 erg cm^-2 s^-1, with exposure of about 50% of the\nLR over the time interval ( T0 + 200s ; T0 + 300s );\n\nThese measurements were obtained with AGILE observing a large portion of\nthe sky in spinning mode. Additional analysis of AGILE data is in\nprogress.",
  "circularId": 25515,
  "createdOn": 1566992568000,
  "email": "francesco.verrecchia@ssdc.asi.it",
  "subject": "LIGO/Virgo S190828l: Upper limits from AGILE-GRID observations",
  "submitter": "Francesco Verrecchia at ASDC  <francesco.verrecchia@ssdc.asi.it>",
  "eventId": "LIGO/Virgo S190828l"
}