Sometimes a bright QSO is not in any catalog!
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by JeanTate
The host of the SE compact radio source in ARG000109i is SDSS J170539.24+424528.1, a STAR. Yet it is, obviously, the very bright nucleus of a galaxy; in other words, an AGN and likely a QSO (the definition of "QSO" contains a threshold absolute brightness, I do not know if this AGN is bright enough):
Yet, while NED records this as both a UV and IR source, it is (apparently) not in any catalog of QSOs! 😮 And no one, it seems, has taken a spectrum 😮 😮
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by zutopian
I think, that it might be either a radio star or an overlap (star/galaxy).
There is a similar looking star (1237665582183874788) in the same field.Or the optical counterpart is actually following object.:
http://skyserver.sdss.org/dr14/en/tools/explore/Summary.aspx?id=1237665582183874750PS: You might want to create an overlay image.
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