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The REX survey: a search for BL Lac objects
Author(s) -
Maccacaro T.,
Caccianiga A.,
Della Ceca R.,
Wolter A.,
Gioia I. M.
Publication year - 1998
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.2123190106
Subject(s) - sky , observatory , physics , astrophysics , active galactic nucleus , astronomy , selection (genetic algorithm) , galaxy , computer science , artificial intelligence
We present the scientific goals and the strategy of the REX survey, a project which has been recently initiated at the Brera Astronomical Observatory in Milan with the aim of selecting a large and statistically representative sample of BL Lac objects and other kinds of Radio Loud Active Galactic Nuclei. More than 1200 PSPC images (for a total of about 2700 square deg. of sky) have been searched for sources detected also in the VLA NVSS survey (as of June 1977). The data and source selection criteria, the cross‐correlation technique and preliminary results are presented and discussed.