FRB 20240114A: No counterpart candidate in Fermi-LAT observations

ATel #16602; G. Principe (University and INFN Trieste), M. Negro (Louisiana State University) N. Di Lalla (Stanford University), N. Omodei (Stanford University), G. Marti-Devesa (University and INFN Trieste), Z. Wadiasingh (University of Maryland College Park, NASA/GSFC), F. Longo (University and INFN Trieste), report on behalf of the Fermi-LAT Collaboration
on 26 Apr 2024; 18:15 UT
Credential Certification: Giacomo Principe (giacomo.principe@inaf.it)

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We have searched data collected by the Fermi Large Area Telescope (LAT) from January to March 2024, for possible high-energy (E > 100 MeV) gamma-ray emission in spatial/temporal coincidence with the repeating FRB 20240114A (ATel #16420) and its extreme radio burst activity (bright bursts - ATel #16432; burst storm - ATel #16505; more than a hundred bright bursts - ATel #16565, GCN 27388).

We performed a search for transient gamma-ray emission from the precise FRB position reported by the EVN (ATel #16542). We used different time windows (from tens of seconds up to few months) around all the events reported so far for the repeating FRB 20240114A. Contrary to what was reported in ATel #16594, we found no significance gamma-ray emission.

We also performed a triplet photons search (see [1, 2]) on the FRB direction and and found no significant triplet possibly associated with the FRB events. The most significant triplet shown has Delta_t=155.1 s with first photon arriving at MET=606946577.4949882.

Gamma-ray flux upper bounds between 100 MeV and 1 GeV for this search vary between 5e-6 and 8e-9 [ph/cm^2/s], for 100 seconds to monthly time scales. The respective detection test statistic (TS) is <2. The Fermi-LAT point of contact for this event is Giacomo Principe (giacomo.principe@ts.infn.it).

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.

[1] Ajello et al., High-energy emission from a magnetar giant flare in the Sculptor galaxy. Nat Astron 5, 385–391 (2021). [2] Principe et al., Hunting for gamma-ray emission from fast radio bursts. A&A Volume 675, July 2023