one-sided lobe or two radio galaxies?
The contours of the radio made it appear as if both the bright IR sources in the centre of the image were radio sources but the contours overlapped into a single source, so I marked both galaxies as being associated with it. Upon reflection, it might also be that the lower galaxy has a one-sided lobe that just happens to coincide with the other galaxy from our line of sight. If so, then perhaps NVSS is able to resolve a more diffuse lobe below that FIRST does not show?
by enno.middelberg scientist, translator
I was about to argue that your latter hypothesis is correct, but I think one can argue one way or another. We won't be able to decide based on these data alone.
Btw, NVSS has a resolution of around 45 arcsec, much lower than that of FIRST, which is 5 arcsec.
by DocR scientist
I have NO idea what we are looking at here. 3 possible IR/optical sources connected with this beast. Here's the SDSS overlay: