Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apjs...64..459s&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 64, June 1987, p. 459-485. Research supported by the Kitt Peak Na
Astronomy and Astrophysics
Astronomy
161
Astronomical Photometry, Bl Lacertae Objects, Infrared Sources (Astronomy), Quasars, Linear Polarization, Near Infrared Radiation, Polarimetry, Spectral Energy Distribution, Variability
Scientific paper
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.
Balonek Thomas J.
Elston Richard
Heckert Paul A.
Smith Paul S.
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