High-rate active galaxy monitoring at the Wise Observatory. III - The broad-line region of NGC 4151

Details High-rate active galaxy monitoring at the Wise Observatory. III - The broad-line region of NGC 4151 High-rate active galaxy monitoring at the Wise Observatory. III - The broad-line region of NGC 4151

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...367..493m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 367, Feb. 1, 1991, p. 493-506. Research supported by the U.S.-Israel Binati

Astronomy and Astrophysics

Astrophysics

126

Active Galactic Nuclei, Astronomical Spectroscopy, Markarian Galaxies, Seyfert Galaxies, Astronomical Observatories, Emission Spectra, Fourier Analysis, Light Curve, Spectral Line Width

Scientific paper

Results are presented of monitoring of continuum and emission-line variability in the AGN of the Seyfert galaxy NGC 4151, observed with the Wise Observatory 1-m telescope on 67 nights during a 216-day period between December 15, 1987 and July 18, 1988. Four types of data analysis were carried out for the broad-line region (BLR) of NGC 4151: cross correlation, used to derive the characteristic lag of the lines to the continuum; Fourier deconvolution, to recover the BLR transfer function; light-curve modeling, to determine the best-fit parameters of the BLR and the regions of the parameter space which can be excluded; and the comparison of the blue and the red wings of the emission lines, to deduce information on the velocity field of the BLR of NGC 4151. It is shown that the new data set enables, for the first time, a detailed look into the inner regions of NGC 4151.

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