to appear in The Astrophysical Journal STIS Echelle Observations of the Seyfert Galaxy NGC 4151: Physical Conditions in the Ultraviolet Absorbers1 S. B. Kraemer2,D.M.Crenshaw2,J.B.Hutchings3,I.M.George4;5, A.C. Danks6,T.R. Gull7, M.E. Kaiser8, C.H. Nelson9, & D. Weistrop9 ABSTRACT 1Based on observations made with the NASA/ESA Hubble Space Telescope. STScI is operated by the Association of Universities for Research in Astronomy, Inc. under the NASA contract NAS5-26555. 2Catholic University of America, NASA’s Goddard Space Flight Center, Code 681, Greenbelt, MD 20771;
[email protected],
[email protected]. 3Dominion Astrophysical Observatory, National Research Council of Canada, Victoria, BC V8X 4M6, Canada;
[email protected]. 4Laboratory for High Energy Astrophysics, NASA’s Goddard Space Flight Center, Code 662, Greenbelt, MD 20771;
[email protected] 5Joint Center for Astrophysics, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250 6Raytheon Polar Services, NASA’s Goddard Space Flight Center, Code 681, Greenbelt, MD 20771;
[email protected]. 7NASA’s Goddard Space Flight Center, Code 681, Greenbelt, MD 20771;
[email protected]. 8Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218;
[email protected]. 9Department of Physics, University of Nevada, Las Vegas, 4505 Maryland Parkway, Las Vegas, NV 89154-4002;
[email protected],
[email protected]. –2– We have examined the physical conditions in intrinsic UV-absorbing gas in the Seyfert galaxy NGC 4151, using echelle spectra obtained with the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope (HST) on 1999 July 19.