Mass Outflow of the X-ray Emission Line Gas in NGC 4151

Support for this work was provided by the National Aeronautics and Space Administration (NASA) through Chandra Award Number G04-15106X issued by the Chandra X-ray Observatory Center, which is operated by the Smithsonian Astrophysical Observatory for and on behalf of the National Aeronautics Space Administration under contract NAS8-03060, and from program GO-13508, support for which was provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. This research has made use of data and/or software provided by the High Energy Astrophysics Science Archive Research Center (HEASARC), which is a service of the Astrophysics Science Division at NASA/Goddard Space Flight Center (GSFC) and the High Energy Astrophysics Division of the Smithsonian Astrophysical Observatory. We are grateful to the Chandra operations teams for performing the observations and providing software and calibration for the data analysis. We thank Keith Arnaud, for his continuing maintenance and development of XSPEC, and Gary Ferland and associates, for the maintenance and development of CLOUDY.