论文标题
Meerkat,E-Merlin,H.E.S.S。并迅速搜索与三个局部FRB相关的持久和短暂发射
A MeerKAT, e-MERLIN, H.E.S.S. and Swift search for persistent and transient emission associated with three localised FRBs
论文作者
论文摘要
我们报告使用Meerkat射电望远镜从一次性快速无线电爆发(FRB)20190714a以及两个重复的FRB,20190711a和20171019a中搜索持续的无线电排放。对于FRB 20171019a,我们还用非常高的能量伽马射线进行了高能立体系统(H.E.S.S.)的同时观察,并在紫外线,光学和X射线频段中搜索了信号。对于此FRB,我们获得了1.39x10^-16 erg/cm^-2/s/amstrong的UV通量上限,X射线极限为〜6.6x10^-14 erg/cm^-2/s,并且对非常高的Energy Gamma-ray gamma-ray Flux(phi)(phi)(e> 120 geev)(e> 120 geev)<1.7 x10^/cm/cm of timimat在FRB 20190711a和20171019a的位置,我们获得了〜15 microjy/beam的无线电上限,用于持续发射,但检测到弥漫性无线电发射,峰值亮度〜53 microjy/beam与FRB 20190714a相关的峰值亮度为z = 0.2365。这是对无线电连续发射的首次检测,可能与FRB 20190714a的宿主(Galaxy)相关,并且只是第三个已知具有这种关联的FRB。鉴于可能持续的持续来源可能关联,FRB 20190714a可能是重复的FRB,其年龄在FRB 20121102a和FRB 20180916a之间。对这些FRB的重复爆发的并行搜索显示,没有新的检测到0.08 JY MS的通量持续1 ms的持续时间爆发。
We report on a search for persistent radio emission from the one-off Fast Radio Burst (FRB) 20190714A, as well as from two repeating FRBs, 20190711A and 20171019A, using the MeerKAT radio telescope. For FRB 20171019A we also conducted simultaneous observations with the High Energy Stereoscopic System (H.E.S.S.) in very high energy gamma rays and searched for signals in the ultraviolet, optical, and X-ray bands. For this FRB, we obtain a UV flux upper limit of 1.39x10^-16 erg/cm^-2/s/Amstrong, X-ray limit of ~ 6.6x10^-14 erg/cm^-2/s and a limit on the very-high-energy gamma-ray flux (Phi) (E > 120 GeV) < 1.7 x 10^-12 erg/cm^-2/s. We obtain a radio upper limit of ~15 microJy/beam for persistent emission at the locations of both FRBs 20190711A and 20171019A, but detect diffuse radio emission with a peak brightness of ~53 microJy/beam associated with FRB 20190714A at z = 0.2365. This represents the first detection of the radio continuum emission potentially associated with the host (galaxy) of FRB 20190714A, and is only the third known FRB to have such an association. Given the possible association of a faint persistent source, FRB 20190714A may potentially be a repeating FRB whose age lies between that of FRB 20121102A and FRB 20180916A. A parallel search for repeat bursts from these FRBs revealed no new detections down to a fluence of 0.08 Jy ms for a 1 ms duration burst.