J/A+AS/106/29 J/A+AS/106/29 Three-year monitoring of a sample of flat-spectrum T Ghosh G Krishna A P Rao Astron. Astrophys. Suppl. Ser. 106 29 1994 1994A&AS..106...29G active gal. nuclei low frequency variability radio sources: general 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.

3C Standard convention denomination (IAU/3C etc.) --- Clas. Source classification (see text.) --- Name Other name --- l_GAMMA limit flag for GAMMA --- GAMMA Corrected variability index (see text) --- Stat. Statistical significance of the variation (see text) --- com. comment (only in table1) --- Obs1 Epoch of the flux density measurement "DD/MM/YY" F327MHz1 Flux density at 327-MHz mJy e_F327Mhz1 rms uncertainty on F327MHz1 mJy Obs2 Epoch of the flux density measurement "DD/MM/YY" F327MHz2 Flux density at 327-MHz2 mJy e_F327MHz2 rms uncertainty on F327MHz2 mJy Obs3 Epoch of the flux density measurement "DD/MM/YY" F327MHz3 Flux density at 327-MHz3 mJy e_F327MHz3 rms uncertainty on F327MHz3 mJy Obs4 Epoch of the flux density measurement "DD/MM/YY" F327MHz4 Flux density at 327-MHz4 mJy e_F327MHz4 rms uncertainty on F327MHz4 mJy Obs5 Epoch of the flux density measurement "DD/MM/YY" F327MHz5 Flux density at 327-MHz5 mJy e_F327MHz5 rms uncertainty on F327MHz5 mJy Obs6 Epoch of the flux density measurement "DD/MM/YY" F327MHz6 Flux density at 327-MHz6 mJy e_F327MHz6 rms uncertainty on F327MHz6 mJy Obs7 Epoch of the flux density measurement "DD/MM/YY" F327MHz7 Flux density at 327-MHza7 mJy e_F327MHz7 rms uncertainty on F327MHz7 mJy Obs8 Epoch of the flux density measurement "DD/MM/YY" F327MHz8 Flux density at 327-MHza8 mJy e_F327MHz8 rms uncertainty on F327MHz8 mJy Obs9 Epoch of the flux density measurement "DD/MM/YY" F327MHz9 Flux density at 327-MHz9 mJy e_F327MHz9 rms uncertainty on F327MHz9 mJy Patricia Bauer CDS 1994May09 J_A+AS_106_29.xml