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SDSS J150243.09+111557.3 is a merging system at z = 0.39 that hosts twoconfirmed AGN, one unobscured and one dust-obscured, offset by severalkiloparsecs. Deane et al. recently reported evidence from the European VLBINetwork (EVN) that the dust-obscured AGN exhibits two flat-spectrum radiosources, J1502SE/SW, offset by 26 mas (140 pc), with each source beingenergized by its own supermassive black hole (BH). This intriguinginterpretation of a close binary BH was reached after ruling out adouble-hotspot scenario, wherein both hotspots are energized by a single,central BH, a configuration occuring in the well-studied Compact SymmetricObjects. When observed with sufficient sensitivity and resolution, an objectwith double hotspots should have an edge-brightened structure. We reportevidence from the Very Long Baseline Array (VLBA) for just such a structure inan image of the obscured AGN with higher sensitivity and resolution than theEVN images. We thus conclude that a double-hotspot scenario should bereconsidered as a viable interpretation for J1502SE/SW, and suggest furtherVLBA tests of that scenario. A double-hotspot scenario could have broadimplications for feedback in obscured AGNs. We also report a VLBA detection ofhigh-brightness-temperature emssion from the unobscured AGN that is offsetseveral kiloparsecs from J1502SE/SW.

Evidence from the Very Long Baseline Array that J1502SE/SW are Double Hotspots, not a Supermassive Binary Black Hole