Systematic Surveys for Quasars with the Slitless Spectrum Technique

Patrick S. Osmer
1980 Symposium - International astronomical union  
Recent results with the slitless spectrum technique are reviewed and the total surface densities from five independent surveys are compared. The observational base for extending the technique to search for quasars with z > 3.5 is now large enough that either the apparent cutoff at z = 3.5 will be confirmed in new surveys or quasars with z > 3.5 will be found.
doi:10.1017/s0074180900068364 fatcat:lxwlymury5hzvm5gncliseia3q