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Title:
Emission-line QSOs in the region of the Hercules cluster of galaxies [ Erratum: 1985ApJ...297..852B ]
Authors:
Burbidge, E. M.; Smith, H. E.; Junkkarinen, V. T.; Hoag, A. A.
Affiliation:
AA(California, University, La Jolla, CA; Kitt Peak National Observatory, Tucson, AZ), AB(California, University, La Jolla, CA; Kitt Peak National Observatory, Tucson, AZ), AC(Kitt Peak National Observatory, Tucson, AZ), AD(Lowell Observatory, Flagstaff, AZ)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 288, Jan. 1, 1985, p. 82-93. (ApJ Homepage)
Publication Date:
01/1985
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Astronomical Spectroscopy, Emission Spectra, Galactic Clusters, Quasars, Absorption Spectra, Astronomical Catalogs, Photographic Plates, Red Shift, Wavelengths
DOI:
10.1086/162766
Bibliographic Code:
1985ApJ...288...82B

Abstract

Slit spectrophotometry in the 305-855-nm range of 25 QSO candidates identified by slitless spectroscopy in two 1-deg-sq fields (one centered on Abell 2151 and one in a blank region) near the Hercules cluster of galaxies, obtained using image-dissector scanners on the 3-m Lick Observatory and 4-m KPNO telescopes at resolution 5-20 A during 1976-1979, are reported. The data are presented in tables and spectrograms and characterized in detail. In the cluster field, 14 candidates are confirmed as QSOs with z = 0.89-3.24; in the blank field, six are confirmed with z = 1.52-3.00. While the strongest feature of most spectra is found to be the Lyman alpha line, five QSOs have the 154.9-nm line of C IV and one the semiforbidden 190.9-nm line of C III as strong features. The wide variety of spectral profiles and absorption features in the higher-redshift QSOs and the lack of any QSOs with broad absorption troughs are discussed, and the use of these QSOs as probes for warm or cool gas in the Hercules cluster in Space Telescope Faint Object Spectrograph observations is suggested.

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