Observations of the QSOs from the Automated Plate Measuring machine (APM) multicolor survey for bright Z > 4 objects

Details Observations of the QSOs from the Automated Plate Measuring machine (APM) multicolor survey for bright Z > 4 objects Observations of the QSOs from the Automated Plate Measuring machine (APM) multicolor survey for bright Z > 4 objects

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...183.6401s&link_type=abstract

American Astronomical Society, 183rd AAS Meeting, #64.01; Bulletin of the American Astronomical Society, Vol. 25, p.1389

Astronomy and Astrophysics

Astronomy

Scientific paper

The APM multicolor survey for bright z > 4 objects, covering 2500 deg(2) of sky to m_r ~ 19, has resulted in the discovery of 27 QSOs with z >= 4. Optical spectrophotometry at 5 Angstroms resolution has been obtained for 24 QSOs and infrared JHK photometry for 10. We will present results of the first detailed study of these objects including emission line equivalent widths; continuum emission slopes longward of Lyman-alpha ; D_A, the depression of the continuum shortward of the Lyman-alpha emission; and composite spectrum analysis. We shall present a comparison between the z > 4 APM QSOs and the z > 4 QSOs from the grism emission survey by Schmidt, Schneider, and Gunn.

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