NIR imaging spectroscopy of the inner few arcseconds of NGC 4151 with
  OSIRIS at Keck
  We present H- and K-band data from the inner arcsecond of the Seyfert 1.5
galaxy NGC 4151 obtained with the adaptive optics assisted near-infrared
imaging field spectrograph OSIRIS at the Keck Observatory. We present the
morphology and dynamics of most species detected but focus on the morphology
and dynamics of the narrow line region (as traced by emission of [FeII] \lambda
1.644\mu m), the interplay between plasma ejected from the nucleus (as traced
by 21 cm continuum radio data) and hot H2 gas and characterize the detected
nuclear HeI$\lambda 2.058 \mu m absorption feature as a narrow absorption line
(NAL) phenomenon.
