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Published October 1994 | Erratum + Published
Journal Article Open

Multicolor detection of high-redshift quasars, II. Five objects with z ≳ 4"


We report the results of a multicolor wide-field CCD survey designed to rediscover several BRI quasars previously found in a photographic survey by Irwin et al [ASPCS, 21, 117 (1991)], but not fully documented in the literature. Here we provide spectra, redshifts, finding charts, magnitudes, and coordinates for four such BRI quasars. Follow-up observations were obtained for BRI 2235—03, a borderline BAL object. Amoderate resolution absorption line spectrum for the object shows a very dense Lya forest and two CIV doublets at z>3. Its visible spectrum is redder than those of the other quasars presented, although it is similar in the infrared. J, H, and K magnitudes are presented for this quasar, showing it to be one of the most luminous objects known. New J, H, and K photometry is presented for PC 1247+3406, the most distant quasar known. In the course of the survey we also discovered a new quasar with z=4.042. Its spectrum, coordinates, magnitudes, and finding chart are presented here as well.

Additional Information

© 1995 American Astronomical Society. Received 1995 April 5. We would like to thank numerous colleagues for their enthusiastic reception of the first paper in this series as well as for their encouragement in publishing this paper. We also wish to thank the staffs of Palomar Observatory, Cerro Tololo Inter-American Observatory, and the European Southern Observatory for all of their help. J.D.S. acknowledges support from an NPSC Fellowship. This work was supported in part by an NSF PYI Award AST-9157412 and a Dudley Observatory Award to S.D. Infrared Astrophysics at Caltech is supported by a grant from the NSF.

Attached Files

Published - 1994AJ____108_1147S.pdf

Erratum - 1995AJ____110__439S.pdf


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