Optical and near-infrared observations of BL Lacertae objects and active quasars

Journal Article · Mon Jun 01 04:00:00 EDT 1987 · Astrophys. J., Suppl. Ser.; (United States)

DOI:https://doi.org/10.1086/191203· OSTI ID:6086354

Smith, P S; Balonek, T J; Elston, R; Heckert, P A

UBVRI and JHK photometric and polarimetric observations, obtained using the 1.5-m UCSD/UM telescope at Mount Lemmon, AZ during 1982-1984, are reported for a sample of 10 BL Lac objects, eight optically violent variable quasars, and the low-polarization quasar 3C 273. The data are presented in extensive tables and graphs and analyzed in detail. Most of the objects are found to have undergone large polarization variations on time scales ranging from 1 d to several months; five objects had fractional linear polarization P greater than 30 percent at least once during the period of observation, but four never had P greater than 10 percent. Of four objects which exhibited a preferred polarization position angle (theta), three had theta within 20 deg of the jet position angle determined by VLBI. 118 references.

• Research Organization: New Mexico Univ., Albuquerque; Steward Observatory, Tucson, AZ; Colgate Univ., Hamilton, NY; California State Univ., San Bernardino
• OSTI ID: 6086354
• Journal Information: Astrophys. J., Suppl. Ser.; (United States), Journal Name: Astrophys. J., Suppl. Ser.; (United States) Vol. 64; ISSN APJSA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BL LACERTAE OBJECTS
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
INFRARED RADIATION
NEAR INFRARED RADIATION
PHOTOMETRY
POLARIMETRY
QUASARS
RADIATIONS
VARIATIONS
VISIBLE RADIATION