INTEGRAL gamma-ray upper limits on the periodic FRB180916
ATel #13466; Francesca Panessa (INAF-IAPS, Italy), Volodymyr Savchenko, Carlo Ferrigno (ISDC, University of Geneva, CH), Angela Bazzano, Pietro Ubertini (INAF-IAPS, Italy)
on 11 Feb 2020; 15:32 UT
Credential Certification: Francesca Panessa (francesca.panessa@iaps.inaf.it)
Subjects: Gamma Ray, Fast Radio Burst
We have observed with INTEGRAL the FRB 180916.J0158+65 during a time interval of predicted bursting radio pulse activity as indicated by the recent monitoring results of the CHIME/FRB Collaboration. The observations were performed during INTEGRAL orbits 2190 (2020-02-03 22:39 to 2020-02-05 06:43) and 2191 (2020-02-05 16:45 to 2020-02-07 20:34), for a total 276 ks on-source time.
In the complete observation we do not detect the source and estimate a 3-sigma upper limit on the average flux at the level of 1.5e-11 erg/cm^2/s in 28-80 keV energy range (with IBIS/ISGRI), and 2.8e-11 erg/cm^2/s in 3-10 keV (with JEM-X).
Assuming a distance of the host galaxy of 149 Mpc (Marcote et al 2020), this corresponds to a luminosity limit of 6.8e43 erg/s and 7.5e43 erg/s in 28-80 and 3-10 energy ranges, respectively.
In addition we searched for any short magnetar-like bursts in the whole INTEGRAL/ISGRI observation, and did not detect any, setting an upper limit on 28-80 keV 1s peak flux at the level of 1.1e-08 erg/cm2/s and on the 100 ms peak flux at the level 3.4e-8 erg/cm2/s anywhere within the observation time span (quoted above). Assuming the known distance to the source, these flux limits correspond to 2.9e+46 erg/s and 9.2e+46 erg/s respectively.
A more detailed analysis is in progress.
We would like to thank the INTEGRAL team at ESA for the quick activation of the ToO.
