Three-year monitoring of a sample of flat-spectrum radio sources at 327 MHz

Details Three-year monitoring of a sample of flat-spectrum radio sources at 327 MHz Three-year monitoring of a sample of flat-spectrum radio sources at 327 MHz

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26as..106...29g&link_type=abstract

Astronomy and Astrophysics Suppl. 106, 29-37 (1994)

Astronomy and Astrophysics

Astrophysics

11

Active Galactic Nuclei, Radio Sources, Low Frequency Variability

Scientific paper

Results of a 3-year monitoring programme at 327 MHz with the Ooty Synthesis Radio Telescope are presented. The majority of the sample consists of BL Lac objects, high-optical polarization quasars (HPQ) and low-optical polarization quasars (LPQ). In addition, a few known variable sources, GHz-peaked spectrum sources and compact doubles were also added. Including an additional set of 36 control and calibrator sources, a total of 82 sources were observed at roughly 3-month intervals for about 3 years. We find 19 variable and 6 possibly-variable sources. However, the observed variability in the BL Lac-HPQ-LPQ subsamples does not seem to be influenced by their optical properties.

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