A MeerKAT, e-MERLIN, H.E.S.S. and Swift search for persistent and
  transient emission associated with three localised FRBs
  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.
