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Three new BL Lacertae objects in the Palomar-Green surveyWe 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.
Document ID
19950044743
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Fleming, Thomas A. (Max-Planck-Institut fuer Extraterrestrische Physik Garching, Germany)
Green, Richard F. (National Optical Astronomy Observatories, Tucson, AZ United States)
Jannuzi, Buell T. (Institute for Advanced Studies, Princeton, NJ United States)
Liebert, James (University of Arizona, Tucson, AZ United States)
Smith, Paul S. (University of Arizona, Tucson, AZ United States)
Fink, Henner (Max-Planck-Institut fuer Extraterrestrische Physik Garching, Germany)
Date Acquired
August 16, 2013
Publication Date
November 1, 1993
Publication Information
Publication: Astronomical Journal
Volume: 106
Issue: 5
ISSN: 0004-6256
Subject Category
ASTRONOMY
Funding Number(s)
CONTRACT_GRANT: NSF AST-92-17961
CONTRACT_GRANT: NAG5-1630
CONTRACT_GRANT: NAS5-29293
CONTRACT_GRANT: NAGW-1480
Distribution Limits
Public
Copyright
Other