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Observatory was made possible by the generous financial support of the W. M. Keck Foundation.

By R. W. Goodrich, R. Campbell, F. H. Chaffee, G. M. Hill, D. Sprayberry, D. P. Schneider, S. Kaspi, X. Fan, J. E. Gunn and M. A. Strauss


We use the NIRSPEC near-IR spectrometer on Keck II to obtain moderate resolution (R = 1540) spectroscopy that shows conclusively that the C IV emission line in the z = 5.74 quasar SDSSp J104433.04–012502.2 is accompanied by broad, blueshifted C IV absorption. The line has a “balnicity index ” of 900 km s –1 and a rest-frame equivalent width of 13.1 ± 1.3 Å relative to the continuum. This confirms its membership in the class of objects called “broad-absorption line ” (BAL) QSOs. SDSSP J1044–0125 was previously suggested to be a BAL QSO based on its larger UV-to-X-ray flux ratio than most non-BAL QSOs. The C IV emission is of normal strength, implying a metallicity similar to that found in other, lower-redshift QSOs

Year: 2001
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