TY - JOUR
T1 - Highly variable objects in the palomar-quest survey
T2 - A blazar search using optical variability
AU - Bauer, Anne
AU - Baltay, Charles
AU - Coppi, Paolo
AU - Donalek, Ciro
AU - Drake, Andrew
AU - Djorgovski, S. G.
AU - Ellman, Nancy
AU - Glikman, Eilat
AU - Graham, Matthew
AU - Jerke, Jonathan
AU - Mahabal, Ashish
AU - Rabinowitz, David
AU - Scalzo, Richard
AU - Williams, Roy
PY - 2009
Y1 - 2009
N2 - We identify 3113 highly variable objects in 7200 deg2 of the Palomar-QUEST (PQ) Survey, which each varied by more than 0.4 mag simultaneously in two broadband optical filters on timescales from hours to roughly 3.5 years. The primary goal of the selection is to find blazars by their well-known violent optical variability. Because most known blazars have been found in radio and/or X-ray wavelengths, a sample discovered through optical variability may have very different selection effects, elucidating the range of behavior possible in these systems. A set of blazars selected in this unusual manner will improve our understanding of the physics behind this extremely variable and diverse class of active galactic nucleus (AGN). The object positions, variability statistics, and color information are available using the PQ CasJobs server. The time domain is just beginning to be explored over large sky areas; we do not know exactly what a violently variable sample will hold. About 20% of the sample has been classified in the literature; over 70% of those objects are known or likely AGNs. The remainder largely consists of a variety of variable stars, including a number of RR Lyrae and cataclysmic variables.
AB - We identify 3113 highly variable objects in 7200 deg2 of the Palomar-QUEST (PQ) Survey, which each varied by more than 0.4 mag simultaneously in two broadband optical filters on timescales from hours to roughly 3.5 years. The primary goal of the selection is to find blazars by their well-known violent optical variability. Because most known blazars have been found in radio and/or X-ray wavelengths, a sample discovered through optical variability may have very different selection effects, elucidating the range of behavior possible in these systems. A set of blazars selected in this unusual manner will improve our understanding of the physics behind this extremely variable and diverse class of active galactic nucleus (AGN). The object positions, variability statistics, and color information are available using the PQ CasJobs server. The time domain is just beginning to be explored over large sky areas; we do not know exactly what a violently variable sample will hold. About 20% of the sample has been classified in the literature; over 70% of those objects are known or likely AGNs. The remainder largely consists of a variety of variable stars, including a number of RR Lyrae and cataclysmic variables.
KW - BL Lacertae objects: general
KW - Catalogs
KW - Galaxies: active
KW - Quasars: general
UR - http://www.scopus.com/inward/record.url?scp=70549098822&partnerID=8YFLogxK
U2 - 10.1088/0004-637X/705/1/46
DO - 10.1088/0004-637X/705/1/46
M3 - Article
AN - SCOPUS:70549098822
SN - 0004-637X
VL - 705
SP - 46
EP - 53
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
ER -