The contour overlay image in this post was created from sources, and using methods, described in this RGZ Talk
thread. First in red.
The host for the emission appears to be SDSS J100044.51+204727.7, which has a z_sp=0.210 +/- 0.00003. This object has recorded First flux emission, a radio references in SIMBAD, and an ALLWISE reference, ALLWISE J100044.52+204727.8. This object is also in a #cluster environment.
To the WSW and SW of SDSS J100044.51+204727.7 there are radio references in NED for SDSS J100042.94+204713.9 and SDSS J100043.94+204715.8, which are more in the middle of the emission and are both listed as #stars. Whether either of these objects are the host of all or part of the emission is hard to determine.
This ARG field hasn't been imaged in VLASS as yet.
As always, comments, suggestions, welcome.