Steps toward determination of the size and structure of the broad-line region in active galatic nuclei. 8: an intensive HST, IUE, and ground-based study of NGC 5548

Korista, K. T.; Alloin, D.; Barr, P.; Clavel, J.; Cohen, R. D.; Crenshaw, D. M.; Evans, I. N.; Horne, K.; Koratkar, A. P.; Kriss, G. A.; Krolik, J. H.; Malkan, M. A.; Morris, S. L.; Netzer, H.; O'Brien, P. T.; Peterson, B. M.; Reichert, G. A.; Rodriguez-Pascual, P. M.; Wamsteker, W.; Anderson, K. S. J.; Axon, D. J.; Benitez, E.; Berlind, P.; Bertram, R.; Blackwell, J. H., Jr.; Bochkarev, N. G.; Boisson, C.; Carini, M.; Carrillo, R.; Carone, T. E.; Cheng, F.-Z.; Christensen, J. A.; Chuvaev, K. K.; Dietrich, M.; Dokter, J. J.; Doroshenko, V.; Dultzin-Hacyan, D.; England, M. N.; Espey, B. R.; Filippenko, A. V.; Gaskell, C. M.; Goad, M. R.; Ho, L. C.; Huchra, J. P.; Jiang, X. J.; Kaspi, S.; Kollatschny, W.; Laor, A.; Luminet, J.-P.; MacAlpine, G. M.; MacKenty, J. W.; Malkov, Yu. F.; Maoz, D.; Martin, P. G.; Matheson, T.; McCollum, B.; Merkulova, N.; Metik, L.; Mignoli, M.; Miller, H. R.; Pastoriza, M. G.; Pelat, D.; Penfold, J.; Perez, M.; Perola, G. C.; Persaud, J. L.; Peters, J.; Pitts, R.; Pogge, R. W.; Pronik, I.; Pronik, V. I.; Ptak, R. L.; Rawley, L.; Recondo-Gonzalez, M. C.; Rodriguez-Espinosa, J. M.; Romanishin, W.; Sadun, A. C.; Salamanca, I.; Santos-Lleo, M.; Sekiguchi, K.; Sergeev, S. G.; Shapovalova, A. I.; Shields, J. C.; Shrader, C.; Shull, J. M.; Silbermann, N. A.; Sitko, M. L.; Skillman, D. R.; Smith, H. A.; Smith, S. M.; Snijders, M. A. J.; Sparke, L. S.; Stirpe, G. M.; Stoner, R. E.; Sun, W.-H.; Thiele, U.; Tokarz, S.; Tsvetanov, Z. I.; Turnshek, D. A.; Veilleux, S. et al.
Referencia bibliográfica

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 97, no. 2, P. 285-330

Fecha de publicación:
4
1995
Número de autores
112
Número de autores del IAC
1
Número de citas
286
Número de citas referidas
231
Descripción
We present the data and initial results from a combined Hubble Space Telescope (HST)/IUE/ground-based spectroscopic monitoring campaign on the Seyfert 1 galaxy NGC 5548 that was undertaken in order to address questions that require both higher temporal resolution and higher signal-to-noise ratios than were obtained in our previous multiwavelength monitoring of this galaxy in 1988-1989. IUE spectra were obtained once every 2 days for a period of 74 days beginning on 1993 March 14. During the last 39 days of this campaign, spectroscopic observations were also made with the HST Faint Object Spectrograph (FOS) on a daily basis. Ground-based observations, consisting of 165 optical spectra and 77 photometric observations (both CCD imaging and aperture photometry), are reported for the period 1992 October-1993 September, although many of the data are concentrated around the time of the satellite-based program. These data constitute a fifth year of intensive optical monitoring of this galaxy. In this contribution we describe the acquisition and reduction of all of the satellite and ground-based data obtained in this program. We describe in detail various photometric problems with the FOS and explain how we identified and corrected for various anomalies.