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The new BL Lacertae objects discovered by an efficient X-ray/radio/optical techniqueWe report the recent discovery of ten BL Lac objects in the Einstein IPC Slew Survey by means of X-ray/radio versus X-ray/optical color-color diagrams and confirming optical spectroscopy. These ten BL Lac objects were discovered using a technique proposed by Stocke et al. (1989) which exploits the characteristic broad-band spectra of BL Lac objects. New VLA detections provide accurate fluxes (limiting f(6 cm) about 0.5 mJy) and about 1 arcsec positions, facilitating the determination of an optical counterpart. All ten new BL Lac objects show essentially featureless optical spectra and lie within the range of radio/X-ray/optical colors of known X-ray-selected BL Lac objects, when about 1 mag optical variability is included. We expect about 50 new BL Lac objects in total, from complete optical follow-up of our now completed VLA work and recent Australia Telescope observations, yielding a complete Slew Survey sample of about 90 BL Lac objects.
Document ID
19930066687
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Schachter, Jonathan F.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Stocke, John T.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Perlman, Eric
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Elvis, Martin
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Remillard, Ron
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Granados, Arno
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Luu, Jane
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Huchra, John P.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Humphreys, Roberta
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Urry, C. M.
(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA; Colorado Univ. Boulder, United States)
Date Acquired
August 16, 2013
Publication Date
August 1, 1993
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 412
Issue: 2
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
93A50684
Funding Number(s)
CONTRACT_GRANT: NAGW-2201
CONTRACT_GRANT: NAG5-1746
CONTRACT_GRANT: NAS8-30751
CONTRACT_GRANT: NAG5-1784
CONTRACT_GRANT: NAGW-2645
CONTRACT_GRANT: NSF AST-90-20008
Distribution Limits
Public
Copyright
Other

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