{
  "bibcode": "2020GCN.28004....1G",
  "body": "**\n\n*S. Garrappa (DESY-Zeuthen) and S. Buson (Univ. of Wuerzburg) on behalf \nof the Fermi-LAT collaboration:*\n\n*\n\nWe report an analysis of observations of the vicinity of the high-energy \nIC200620A neutrino event (GCN 27997) with all-sky survey data from the \nLarge Area Telescope (LAT), on board the Fermi Gamma-ray Space \nTelescope. The IceCube event was detected on 2020-06-20 at 03:03:32.28 \nUT (T0) with J2000 position RA =162.11 (+0.64 -0.95) deg, Decl. = 11.95 \n(+0.63 -0.48) deg 90% PSF containment. No cataloged >100 MeV gamma-ray \nsources (The Fermi-LAT Collaboration 2019, arXiv:1902.10045) are located \nwithin the 90% IC200620A localization error.\n\nWe searched for intermediate (days to years) timescale emission from a \nnew gamma-ray transient source. Preliminary analysis indicates no \nsignificant (> 5 sigma) new excess emission (> 100 MeV), at the \nIC200620A best-fit position. Assuming a power-law spectrum (photon index \n= 2.0 fixed) for a point source at the IceCube best-fit position, the \n >100 MeV flux upper limit (95% confidence) is < 1.4e-10 ph cm^-2 s^-1 \nfor ~11-years (2008-08-04 / 2020-06-20 UTC), < 1.7e-8 (< 1.6e-7) ph \ncm^-2 s^-1 for a 1-month (1-day) integration time before T0.\n\nSince Fermi normally operates in an all-sky scanning mode, regular \nmonitoring of this source will continue. For these observations the \nFermi-LAT contact persons are S. Garrappa (simone.garrappa at desy.de \n<http://desy.de/>) and S. Buson (sara.buson at uni-wuerzburg.de \n<http://uni-wuerzburg.de/>). The Fermi LAT is a pair conversion \ntelescope designed to cover the energy band from 20 MeV to greater than \n300 GeV. It is the product of an international collaboration between \nNASA and DOE in the U.S. and many scientific institutions across France, \nItaly, Japan and Sweden.\n\n*",
  "circularId": 28004,
  "createdOn": 1592742464000,
  "email": "simone.garrappa@desy.de",
  "subject": "Fermi-LAT Gamma-ray Observations of IceCube-200620A",
  "submitter": "Simone Garrappa at DESY  <simone.garrappa@desy.de>",
  "eventId": "IceCube-200620A"
}