2021NatAs...5..372R -
Nature Astronomy, 5, 372-377 (2021/April-0)
A peculiar hard X-ray counterpart of a Galactic fast radio burst.
RIDNAIA A., SVINKIN D., FREDERIKS D., BYKOV A., POPOV S., APTEKAR R., GOLENETSKII S., LYSENKO A., TSVETKOVA A., ULANOV M. and CLINE T.L.
Abstract (from CDS):
Fast radio bursts (FRBs) are bright, millisecond-scale radio flashes of unknown physical origin. Young, highly magnetized, isolated neutron stars-magnetars-have been suggested as the most promising candidates for FRB progenitors owing to their energetics and high X-ray flaring activity. Here we report the detection with Konus-Wind of a hard X-ray event of 28 April 2020 temporally coincident with a bright, two-peak radio burst in the direction of Galactic magnetar SGR 1935+2154, with properties remarkably similar to those of FRBs. We show that the two peaks of the double-peaked X-ray burst coincide in time with the radio peaks and infer a common source and the association of these phenomena. An unusual hardness of the X-ray spectrum strongly distinguishes the 28 April event among multiple `ordinary' flares from SGR 1935+2154. A recent non-detection of radio emission from about 100 typical soft bursts from SGR 1935+2154 favours the idea that bright, FRB-like magnetar signals are associated with rare, hard-spectrum X-ray bursts. The implied rate of these hard X-ray bursts (∼0.04 yr–1 magnetar–1) appears consistent with the rate estimate of SGR 1935+2154-like radio bursts (0.007-0.04 yr–1 magnetar–1).
Abstract Copyright:
©
Journal keyword(s):
Astrophysics - High Energy Astrophysical Phenomena
Status at CDS
:
Large table(s) will be appraised for possible ingestion in VizieR.
Simbad objects:
6
Full paper
View the references in ADS
To bookmark this query, right click on this link: simbad:2021NatAs...5..372R and select 'bookmark this link' or equivalent in the popup menu