APM surveys for high redshift QSOs
Abstract
The first QSO with a redshift z greater than 4 was found using a combination of UK Schmidt Telescope (UKST) plates and the APM automatic plate measuring machine (Warren et al. 1987). By continuing to make use of UKST survey plates plus the APM facility we have added substantially to the number of known QSOs with z greater than 4. A brief description of the general survey technique is presented together with a preliminary discussion of some of the results obtained so far.
- Publication:
-
Publications of the Astronomical Society of Australia
- Pub Date:
- 1991
- DOI:
- Bibcode:
- 1991PASA....9..246I
- Keywords:
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- Quasars;
- Red Shift;
- Sky Surveys (Astronomy);
- Color-Color Diagram;
- Schmidt Telescopes;
- Astronomy