INTEGRAL limits on past high-energy activity from FRB 20200120E in M81

Understand

The repeating fast radio burst FRB 20200120E is located in a globular cluster belonging to the nearby M81 galaxy.

• Its small distance (3.6 Mpc) and accurate localization make it an interesting target to search for bursting activity at high energies.
• From November 2003 to September 2021, the INTEGRAL satellite has obtained an exposure time of 18 Ms on the M81 sky region.
• We used these data to search for hard X-ray bursts from FRB 20200120E using the IBIS/ISGRI instrument, without finding any significant candidate, down to an average fluence limit of $\sim10^{-8}$ erg cm$^{-2}$ (20-200 keV).