Three new BL Lacertae objects in the Palomar-Green Survey

Thomas A. Fleming, Richard F. Green, Buell T. Jannuzi, James Liebert, Paul S. Smith, Henner Fink

Research output: Contribution to journalReview articlepeer-review

36 Scopus citations


We have identified three BL Lacertae objects in the Palomar-Green Survey which were previously misclassified as DC white dwarfs, namely PG 1246 + 586, PG 1424 + 240, and PG 1437 + 398. Our reclassification is based on the detection of these objects as x-ray sources in the ROSAT all-sky survey and upon our subsequent detection of intrinsic linearly polarized and variable optical emission from these sources. As a result of the ROSAT survey, the number of identified BL Lac objects in the Palomar-Green catalog of UV excess objects has been doubled. Corrected optical positions are presented for PG 1246 + 586 and PG 1437 + 398.

Original languageEnglish (US)
Pages (from-to)1729-1733
Number of pages5
JournalAstronomical Journal
Issue number5
StatePublished - Nov 1993

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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