| Deep multicolour imaging of the field towards the quasar pair PC1643+463 AB (1998) | |||||||||||||||
Abstract | |||||||||||||||
| . We present the first results of a deep imaging programme to identify the system responsible for the Cosmic Microwave Background decrement in the field towards the z = 3:8 quasar pair PC1643+4631 A&B. Using the prime focus camera at the William Herschel Telescope we have carried out deep multicolour optical imaging to search for candidate cluster galaxies at extremely high redshift. Using UGR colour selection we find the surface density of z ? 3 Lyman-break galaxy candidates is at least as great as that found in the field of the z = 3:1 structure discovered by Steidel et al. (1998), and may be somewhat greater. 1. Introduction The field towards the z = 3:8 quasar pair PC1643+4631 A&B contains a Cosmic Microwave Background (CMB) decrement, believed to be the SunyaevZel 'dovich (SZ) effect of a massive cluster or proto-cluster of galaxies (Jones et al. 1997; Saunders, these proceedings). Initial optical and infrared follow-up programme revealed no evidence for cluster galaxies to at l... | |||||||||||||||
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