Multifrequency analysis of the new wide-separation gravitational lens candidate RX J0921+4529

We report the discovery of a new two-image gravitational lens candidate. Th e system RX J0921+4529 contains two z(s) = 1.66 quasars separated by 6."93 with an H-band magnitude difference of Deltam=1.39. The HST NIC2 H-band ima ges reveal an H=18.2 spiral galaxy between the quasar images, which is prob ably a member of a z(l) = 0.32 X-ray cluster centered on the field. We dete ct an extended source near the fainter quasar image but not in the brighter image. If this extended source is the host galaxy of the fainter quasar, t hen the system is a binary quasar rather than a gravitational lens. VLA obs ervations at 3.6 cm reveal emission from the lens galaxy at the flux level of 1 mJy and a marginal detection of the brighter quasar.