With the recent release of large ( i.e. , \gtrsim hundred million objects ) , well-calibrated photometric surveys , such as DPOSS , 2MASS , and SDSS , spectroscopic identification of important targets is no longer a simple issue .
In order to enhance the returns from a spectroscopic survey , candidate sources are often preferentially selected to be of interest , such as brown dwarfs or high redshift quasars .
This approach , while useful for targeted projects , risks missing new or unusual species .
We have , as a result , taken the alternative path of spectroscopically identifying interesting sources with the sole criterion being that they are in low density areas of the g - r and r - i color-space defined by the DPOSS survey .
In this paper , we present three peculiar broad absorption line quasars that were discovered during this spectroscopic survey , demonstrating the efficacy of this approach .
PSS J0052+2405 is an Iron LoBAL quasar at a redshift z = 2.4512 \pm 0.0001 with very broad absorption from many species .
PSS J0141+3334 is a reddened LoBAL quasar at z = 3.005 \pm 0.005 with no obvious emission lines .
PSS J1537+1227 is a Iron LoBAL at a redshift of z = 1.212 \pm 0.007 with strong narrow Mg ii and Fe ii emission .
Follow-up high resolution spectroscopy of these three quasars promises to improve our understanding of BAL quasars .
The sensitivity of particular parameter spaces , in this case a two-color space , to the redshift of these three sources is dramatic , raising questions about traditional techniques of defining quasar populations for statistical analysis .