Turner, James E. H.Allington-Smith, JeremyChapman, ScottContent, RobertDone, ChristineHaynes, RogerLee, DavidMorris, Simon2014-03-122014-03-122002-03Turner, James E. H., Jeremy Allington-Smith, Scott Chapman, Robert Content, et al. 2002. "The origin of [Fe II] emission in NGC 4151." Monthly Notices of the Royal Astronomical Society 331(2): 284-2920035-8711http://dx.doi.org/10.1046/j.1365-8711.2002.05214.xhttp://hdl.handle.net/10222/45454The centre of NGC 4151 has been observed in the J-band with the SMIRFS integral field unit (IFU) on the UK Infrared Telescope. A map of [Fe II] emission is derived, and compared with the distributions of the optical narrow line region and radio jet. We conclude that, because the [Fe II] emission is associated more closely with the visible narrow-line region than with the radio jet, it arises mainly through photoionization of gas by collimated X-rays from the Seyfert nucleus. The velocity field and strength with respect to [Pa B] are found to be consistent with this argument. The performance of the IFU is considered briefly, and techniques for observation and data analysis are discussed.article3312284