MULTICOLOR DETECTION OF HIGH-REDSHIFT QUASARS .2. 5 OBJECTS WITH Z-GREATER-THAN-OR-SIMILAR-TO-4

Citation
Jd. Smith et al., MULTICOLOR DETECTION OF HIGH-REDSHIFT QUASARS .2. 5 OBJECTS WITH Z-GREATER-THAN-OR-SIMILAR-TO-4, The Astronomical journal, 108(4), 1994, pp. 1147-1155
Citations number
26
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
00046256
Volume
108
Issue
4
Year of publication
1994
Pages
1147 - 1155
Database
ISI
SICI code
0004-6256(1994)108:4<1147:MDOHQ.>2.0.ZU;2-Y
Abstract
We report the results of a multicolor wide-field CCD survey designed t o rediscover several BRI quasars previously found in a photographic su rvey 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 obs ervations were obtained for BRI 2235-03, a borderline BAL object. A mo derate resolution absorption line spectrum for the object shows a very dense Ly alpha forest and two C Iv doublets at z>3. Its visible spect rum is redder than those of the other quasars presented, although it i s similar in the infrared. J, H, and K magnitudes are presented for th is quasar, showing it to be one of the most luminous objects known. Ne w J, H, and K photometry is presented for PC 1247+3406, the most dista nt quasar known. In the course of the survey we also discovered a new quasar with z=4.042. Its spectrum, coordinates, magnitudes, and findin g chart are presented here as well.