1. Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. V. Variability of the ultraviolet continuum and emission lines of NGC 3783
- Author
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Reichert, G. A., Rodríguez-Pascual, P. M., Alloin, D., Clavel, J., Crenshaw, D. M., Kriss, G. A., Krolik, J. H., Malkan, M. A., Netzer, H., Peterson, B. M., Wamsteker, W., Altamore, A., Altieri, B., Anderson, K. S., Blackwell Jr, J. H., Boisson, C., Brosch, N., Carone, T. E., Dietrich, M., England, M. N., Evans, I. N., Filippenko, A. V., Gaskell, C. M., Goad, M., Gondhalekar, P. M., Horne, K., Kazanas, D., Kollatschny, W., Koratkar, A. P., Korista, K. T., Macalpine, G. M., Maoz, D., Mazeh, T., Mccollum, B., Miller, H. R., Mendes Oliveira, C., O Brien, P. T., Pastoriza, M. G., Pelat, D., Pérez, E., Perola, G. C., Pogge, R. W., Ptak, R. L., Recondo-González, M. C., Rodríguez-Espinosa, J., Rosenblatt, E. I., Sadun, A. C., Santos-Lléo, M., Shields, J. C., Shrader, C. R., Shull, J. M., Simkin, S. M., Sitko, M. L., Snijders, M. A. J., Sparke, L. S., Giovanna Maria Stirpe, Stoner, R., Storchi-Bergmann, T., Sun, W. -H, Wang, T., Welsh, W. F., White, R. J., Winge, C., and Zheng, W.
- Subjects
Galáxia NGC 5548 ,Seyfert [Galaxies] ,active [Galaxies] ,nuclei [Galaxies] ,Espectros astronômicos ,individual (NGC 3783) [Galaxies] ,Galaxias seyfert ,Nucleo galatico ,Galáxia NGC 3783 ,galaxies [Ultraviolet] - Abstract
We report on the results of intensive ultraviolet spectral monitoring of the Seyfert 1 galaxy NGC 3783. The nucleus of NGC 3783 was observed with the International Ultraviolet Explorer satellite on a regular basis for a total of 7 months, once every 4 days for the first 172 days and once every other day for the final 50 days. Significant variability was observed in both continuum and emission-line ftuxes. The light curves for the con tinuum ftuxes exhibited two well-defined local mínima or "dips," the first lasting