Kavli Affiliate: Jing Wang
| First 5 Authors: Ye Li, Ye Li, , ,
| Summary:
The physical origin of fast radio bursts (FRBs) remains uncertain. Although
multiwavelength observations offer critical diagnostics and have been widely
conducted, only Galactic FRB~20200428D is associated with an X-ray burst from
the magnetar SGR J1935+2154. Here, we present multiwavelength follow-up
observations of the nearby bright FRB~20250316A, including the
Five-hundred-meter Aperture Spherical radio Telescope (FAST), Einstein Probe
(EP) X-ray mission, Chandra X-ray Observatory, Wide Field Survey Telescope
(WFST) and Space Variable Object Monitor/Visible Telescope (SVOM/VT). A
13.08-hour FAST follow-up observational campaign suggests that this burst is
likely a one-off event. A prompt EP follow-up and multi-epoch observational
campaign totaling $>$ 100 ks led to the detection of an X-ray source within the
angular resolution of its Follow-up X-ray Telescope (FXT, $10^primeprime$).
A subsequent Chandra observation revealed this source to be offset by
$7^primeprime$ from the FRB position, and established a 0.5-10 keV flux
upper limit of $7.6times 10^-15$ $rm erg,cm^-2,s^-1$ at the FRB
position, corresponding to $sim 10^39$ $rm erg,s^-1$ at the 40 Mpc
distance of the host galaxy NGC~4141. These results set one of the most
stringent limits on X-ray emission from a non-repeating FRB, disfavoring
ultra-luminous X-ray sources (ULXs) as counterparts of apparently one-off FRBs
and offering critical insights into afterglow models. Our study suggests that
an arcsecond localization of both the FRB and its potential X-ray counterpart
is essential for exploring the X-ray counterpart of an FRB.
| Search Query: ArXiv Query: search_query=au:”Jing Wang”&id_list=&start=0&max_results=3