Three New BL Lacertae Objects in the Palomar-Green Survey
Abstract
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.
- Publication:
-
The Astronomical Journal
- Pub Date:
- November 1993
- DOI:
- 10.1086/116760
- Bibcode:
- 1993AJ....106.1729F
- Keywords:
-
- Bl Lacertae Objects;
- Light Emission;
- Linear Polarization;
- Sky Surveys (Astronomy);
- Ultraviolet Spectra;
- White Dwarf Stars;
- X Ray Sources;
- Astronomical Catalogs;
- Astronomical Polarimetry;
- Astronomical Spectroscopy;
- Helium;
- Rosat Mission;
- Stellar Atmospheres;
- Astronomy;
- BL MACERTAE OBJECTS: INDIVIDUAL: NEW;
- SURVEYS