High-resolution imaging of the double QSO 2345 + 007

Abstract

We present raw and maximum entropy restored images of the quasar pair (gravitational lens candidate) 2345 + 007 A and B. Restorations are performed using an implementation of the Gull-Skilling MEMSYS-3 package of maximum entropy method subroutines designed to achieve subpixel resolution in certain data regimes. Extensive simulations of our data imply that we are able to detect structure in the restored images down to the 0.4" level. Using this method, we qualitatively confirm that component B is resolved and, at least at visual and red wavelengths, elongated in a direction almost perpendicular to the line joining A and B. We also find evidence for a color difference and variation in the magnitude difference between the two components. We believe these data, in conjunction with recent spectroscopic results, more likely favor the multiple quasar rather than gravitational lens interpretation of the objects.