TITLE: GCN CIRCULAR NUMBER: 25239 SUBJECT: Fermi-LAT Gamma-ray Observations of IceCube-190730A DATE: 19/07/31 22:13:43 GMT FROM: Simone Garrappa at DESY S. Garrappa (DESY-Zeuthen, DE), S. Buson (Univ. of Wuerzburg, DE; UMBC, USA) and D. Gasparrini (ASI SSDC; INFN Roma Tor Vergata, IT), on behalf of the Fermi-LAT collaboration: We report an analysis of observations of the vicinity of the high-energy IC190730A neutrino event (GCN 25225) with all-sky survey data from the Large Area Telescope (LAT), on board the Fermi Gamma-ray Space Telescope. The IceCube event was detected on 2019-07-30 20:50:41.31 UTC (T0) with J2000 position RA = 225.79 (-1.43,+1.28) deg, Decl. = +10.47 (-0.89,+1.14) deg 90% PSF containment. One cataloged >100 MeV gamma-ray source is located within the 90% IC190730A localization error, at a distance of roughly 0.3 deg. This is the object 4FGL J1504.4+1029 (The Fermi-LAT Collaboration 2019, arXiv:1902.10045) associated with the FSRQ PKS 1502+106. Based on a preliminary analysis of the LAT data over the-timescales of 1-day and 1-week prior to T0, this object is not significantly detected at gamma-rays. A preliminary light curve of the object is available at the FSSC (https://fermi.gsfc.nasa.gov/ssc/data/access/lat/msl_lc/source/PKS_1502p106). We note that for multiple years PKS1502+106 has been among the top-ten highest-fluence blazars in the whole sky when the integrated long-term GeV gamma-ray flux is considered. After a long high-activity phase of about 4.5 years, its gamma-ray flux has slowly decreased over the past year and is currently much lower than what was observed in the previous 11 years of LAT monitoring. We searched for the existence of intermediate (months to years) timescale emission from a new gamma-ray transient source. Preliminary analysis indicates no significant (>5sigma) new excess emission (>100 MeV) within the IC190730A 90% confidence localization. Assuming a power-law spectrum (photon index = 2.0 fixed) for a point source at the IceCube best-fit position, the >100 MeV flux upper limit (95% confidence) is < 1.9e-9 ph cm^-2 s^-1 for ~11-years (2008-08-04 / 2019-07-31 UTC), < 4.6e-9 (< 1.4e-8) ph cm^-2 s^-1 for a 1-month (1-week) integration time before T0. Since Fermi normally operates in an all-sky scanning mode, regular monitoring of this source will continue. For this source the Fermi-LAT contact person are S. Garrappa (simone.garrappa at desy.de) and S. Buson (sara.buson at gmail.com). The Fermi LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.