On the possibility of registering X-ray flares related to fast radio bursts with the eROSITA telescope

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Platja d'Aro, Girona, Spain


Ms Alena Khokhryakova (Lomonosov Moscow State University)


We discuss the possibility of detecting associated X-ray emission from sources of fast radio bursts with the eROSITA telescope onboard the Spektr-RG observatory. It is shown that during the four years of the survey program, about 300 bursts are expected to appear in the field of view of eROSITA. About 1% of them will be detected by ground based radio telescopes. For a total energy release $\sim~10^{46}$ ergs, depending on the spectral characteristics and absorption by the interstellar and intergalactic media, an X-ray flare can be detected from distances from $\sim 1$ Mpc (thermal spectrum with $kT=200$ keV and strong absorption) up to $\sim1$ Gpc (power-law spectrum with photon index $\Gamma=2$ and realistic absorption). Thus, eROSITA observations will help to provide important constraints on the parameters of sources of fast radio bursts, or may even allow identification of X-ray transient counterparts, which will help to constrain models for the generation of fast radio bursts.

Primary author

Ms Alena Khokhryakova (Lomonosov Moscow State University)


Prof. Sergey Popov (Sternberg Astronomical Institute, Lomonosov Moscow State University)

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