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Prompt X-ray emission from Fast Radio Bursts --- Upper limits with AstroSat | | Akash Anumarlapudi
; Varun Bhalerao
; Shriharsh P. Tendulkar
; Arvind Balasubramanian
; | | Date: |
1 Nov 2019 | | Abstract: | Fast Radio Bursts (FRBs) are short lived ($sim$ msec), energetic transients
(having a peak flux density of $sim$ Jy) with no known prompt emission in
other energy bands. We present results of a search for prompt X-ray emissions
from 41 FRBs using the Cadmium Zinc Telluride Imager (CZTI) on AstroSat which
continuously monitors $sim70\%$ of the sky. Our searches on various timescales
in the 20--200~keV range, did not yield any counterparts in this hard X-ray
band. We calculate upper limits on hard X-ray flux, in the same energy range
and convert them to upper bounds for $eta$: the ratio X-ray to radio fluence
of FRBs. We find $eta leq 10^{8-10}$ for hard X-ray emission. Our results
will help constrain the theoretical models of FRBs as the models become more
quantitative and nearer, brighter FRBs are discovered. | | Source: | arXiv, 1911.0537 | | Services: | Forum | Review | PDF | Favorites | |
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