Steps toward determination of the size and structure of the broad-line region in active galactic nuclei .6. variability of ngc-3783 from ground-based data

Stirpe, Gm; Winge, C; Altieri, B; Alloin, D; Aguero, El; Anupama, Gc; Ashley, R; Bertram, R; Calderon, Jh; Catchpole, Rm; Corradi, Rlm; Covino, E; Dottori, Ha; Feast, Mw; Ghosh, Kk; Hutton, Rg; Glass, Is; Grebel, Ek; Jorda, L; Koen, C; Laney, Cd; Maia, M; Marang, F; Mayya, Yd; Morrell, N; Nakada, Y; Pastoriza, Mg; Pati, Ak; Pelat, D; Peterson, Bm; Prabhu, Tp; Roberts, G; Sagar, R; Salamanca, I; Sekiguchi, K; Storchibergmann, T; Subramaniam, A; Van Winckel, Hans; Vanwyk, F; Villada, M; Wagner, Rm; Whitelock, Pa; Winkler, H; Clavel, J; Dietrich, M; Kollatschny, W; Obrien, Pt; Perola, Gc; Recondogonzalez, Mc; Rodriguezpascual, P; Santoslleo, M

doi:10.1086/174008

Steps toward determination of the size and structure of the broad-line region in active galactic nuclei .6. variability of ngc-3783 from ground-based data

Author:

Stirpe, Gm

Winge, C ; Altieri, B ; Alloin, D ; Aguero, El ; Anupama, Gc ; Ashley, R ; Bertram, R ; Calderon, Jh ; Catchpole, Rm ; Corradi, Rlm ; Covino, E ; Dottori, Ha ; Feast, Mw ; Ghosh, Kk ; Hutton, Rg ; Glass, Is ; Grebel, Ek ; Jorda, L ; Koen, C ; Laney, Cd ; Maia, M ; Marang, F ; Mayya, Yd ; Morrell, N ; Nakada, Y ; Pastoriza, Mg ; Pati, Ak ; Pelat, D ; Peterson, Bm ; Prabhu, Tp ; Roberts, G ; Sagar, R ; Salamanca, I ; Sekiguchi, K ; Storchibergmann, T ; Subramaniam, A ; Van Winckel, Hans ; Vanwyk, F ; Villada, M ; Wagner, Rm ; Whitelock, Pa ; Winkler, H ; Clavel, J ; Dietrich, M ; Kollatschny, W ; Obrien, Pt ; Perola, Gc ; Recondogonzalez, Mc ; Rodriguezpascual, P ; Santoslleo, M

Keywords:

galaxies, active, galaxies, individual (ngc 3783), galaxies, nuclei, galaxies, photometry, galaxies, seyfert, seyfert-galaxy ngc-3783, optical wavelengths, ngc-5548, emission, spectroscopy, Science & Technology, Physical Sciences, Astronomy & Astrophysics, GALAXIES, ACTIVE, GALAXIES, INDIVIDUAL (NGC 3783), GALAXIES, NUCLEI, GALAXIES, PHOTOMETRY, GALAXIES, SEYFERT, SEYFERT-GALAXY NGC-3783, OPTICAL WAVELENGTHS, NGC-5548, EMISSION, SPECTROSCOPY, 0201 Astronomical and Space Sciences, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, 0306 Physical Chemistry (incl. Structural), 5101 Astronomical sciences, 5107 Particle and high energy physics, 5109 Space sciences

Abstract:

The Seyfert 1 galaxy NGC 3783 was intensely monitored in several bands between 1991 December and 1992 August. This paper presents the results from the ground-based observations in the optical and near-IR bands, which complement the data set formed by the International Ultraviolet Explorer (IUE) spectra, discussed elsewhere. Spectroscopic and photometric data from several observatories were combined in order to obtain well-sampled light curves of the continuum and of H beta. During the campaign the source underwent significant variability. The light curves of the optical continuum and of H beta display strong similarities to those obtained with the IUE. The near-IR flux did not vary significantly except for a slight increase at the end of the campaign.