Spectroscopic Monitoring of Active Galactic Nuclei from CTIO. II. IC 4329A, ESO 141-G55, Arakelian 120, and Fairall 9

Details Spectroscopic Monitoring of Active Galactic Nuclei from CTIO. II. IC 4329A, ESO 141-G55, Arakelian 120, and Fairall 9 Spectroscopic Monitoring of Active Galactic Nuclei from CTIO. II. IC 4329A, ESO 141-G55, Arakelian 120, and Fairall 9

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...469..648w&link_type=abstract

Astrophysical Journal v.469, p.648

Astronomy and Astrophysics

Astronomy

16

Galaxies: Active, Galaxies: Individual Alphanumeric: Eso 141-G55, Galaxies: Individual Alphanumeric: Ic 4329A, Galaxies: Individual Name: Arakelian 120, Galaxies: Individual Name: Fairall 9, Galaxies: Seyfert

Scientific paper

The results of an intensive monitoring campaign on the Seyfert 1 galaxies IC 4329A and ESO 141 -G55 are presented. Variability was detected in both continuum and broad emission line fluxes, and the cross- correlation analysis indicates that the most likely delay between the variations of the 6225 A continuum and the response of the Hβ and Hα emission lines for IC 4329A is ~15-25 days. For ESO 141 -G55, the time-series analysis was inconclusive, and we could not obtain a clear cross-correlation signal between the lines and continuum light curves. We also present new data obtained for AKN 120 and Fairall 9, consisting of two sets of optical spectra taken ~4 months apart. Both objects underwent not only significant flux variability (by up to a factor of ~2) in this interval but also strong Hα and Hβ profile variations.

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