The FIRST Radio-loud Broad Absorption Line QSO and Evidence for a Hidden Population of Quasars

  title={The FIRST Radio-loud Broad Absorption Line QSO and Evidence for a Hidden Population of Quasars},
  author={Robert H. Becker and Michael D Gregg and Isobel M. Hook and Richard G. McMahon and Richard L. White and David J. Helfand},
  journal={The Astrophysical Journal Letters},
  pages={L93 - L96}
We have discovered two low-ionization broad absorption line (BAL) quasars in programs to obtain optical spectra for radio-selected quasar candidates from the VLA Faint Images of the Radio Sky at Twenty Centimeters (FIRST) Survey. Both belong to the extremely rare class of BAL QSOs that exhibit narrow absorption lines from metastable excited levels of Fe II and Fe III. Until now, there was just a single object in this class, 0059-2735. In addition, one of our new objects is the first known radio… 

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