STEPS TOWARD DETERMINATION OF THE SIZE AND STRUCTURE OF THE BROAD-LINE REGION IN ACTIVE GALACTIC NUCLEI .8. AN INTENSIVE HST, IUE, AND GROUND-BASED STUDY OF NGC-5548

KORISTA, KT; ALLOIN, D; BARR, P; CLAVEL, J; COHEN, RD; CRENSHAW, DM; EVANS, IN; HORNE, K; KORATKAR, AP; KRISS, GA; KROLIK, JH; MALKAN, MA; MORRIS, SL; NETZER, H; OBRIEN, PT; PETERSON, BM; REICHERT, GA; RODRIGUEZPASCUAL, PM; WAMSTEKER, W; ANDERSON, KSJ; AXON, DJ; BENITEZ, E; BERLIND, P; BERTRAM, R; BLACKWELL, JH; BOCHKAREV, NG; BOISSON, C; CARINI, M; CARRILLO, R; CARONE, TE; CHENG, FZ; CHRISTENSEN, JA; CHUVAEV, KK; DIETRICH, M; DOKTER, JJ; DOROSHENKO, V; DULTZINHACYAN, D; ENGLAND, MN; ESPEY, BR; FILIPPENKO, AV; GASKELL, CM; GOAD, MR; HO, LC; HUCHRA, JP; JIANG, XJ; KASPI, S; KOLLATSCHNY, W; LAOR, A; LUMINET, JP; MACALPINE, GM; MACKENTY, JW; MALKOV, YF; MAOZ, D; MARTIN, PG; MATHESON, T; MCCOLLUM, B; MERKULOVA, N; METIK, L; MIGNOLI, M; MILLER, HR; PASTORIZA, MG; PELAT, D; PENFOLD, J; PEREZ, M; PEROLA, GC; PERSAUD, JL; PETERS, J; PITTS, R; POGGE, RW; PRONIK, I; PRONIK, VI; PTAK, RL; RAWLEY, L; RECONDOGONZALEZ, MC; RODRIGUEZESPINOSA, JM; ROMANISHIN, W; SADUN, AC; SALAMANCA, I; SANTOSLLEO, M; SEKIGUCHI, K; SERGEEV, SG; SHAPOVALOVA, AI; SHIELDS, JC; SHRADER, C; SHULL, JM; SILBERMANN, NA; SITKO, ML; SKILLMAN, DR; SMITH, HA; SMITH, SM; SNIJDERS, MAJ; SPARKE, LS; STIRPE, GM; STONER, RE; SUN, WH; THIELE, U; TOKARZ, S; TSVETANOV, ZI; TURNSHEK, DA; VEILLEUX, S; WAGNER, RM; WAGNER, SJ; WANDERS, I; WANG, T; WELSH, WF; WEYMANN, RJ; WHITE, RJ; WILKES, BJ; WILLS, BJ; WINGE, C; WU, H; ZOU, ZL
1995
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
We present the data and initial results from a combined 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.