sizes are quoted for staring observations. Values given are in arcseconds.]{}

The data presented here were preprocessed by the IRS pipeline (version 15.3) at the [*Spitzer*]{} Science Center (SSC) prior to download. Preprocessing includes ramp fitting, dark-sky subtraction, droop correction, linearity correction, flat-fielding, and flux calibration. For all mapping observations, we used the pipeline-processed ’BCD-level’ data products downloaded from the [*Spitzer*]{} archive in conjunction with *CUBISM* v.1.5 (Kennicutt et al. 2003; Smith et al. 2004) to construct the high-resolution spectral cubes. The 2D FITS output images from [*CUBISM*]{} were smoothed using a Gaussian kernel of 1.5-pixel width. To extract final 1D spectra and line maps, we used the [*CUBEVIEW*]{} and [*CUBESPEC*]{} tools within *CUBISM*. Detailed descriptions of the post-processing steps included in [*CUBISM*]{} are given in Smith et al. (2004). The [*Spitzer*]{} spectra obtained from both staring and mapping observations were further processed using the SMART v. 6.2.4 analysis package (Higdon et al. 2004) and the corresponding version of the calibration files (v.1.4.8), which were used to obtain final line fluxes.

[lccc]{}\

\
& \[NeV\] 14.32& \[NeV\] 24.32& \[OIV\] 25.89\
& (97.1 eV) & (97.1 eV) & (54.9 eV)\
& (2) & & (4)\
\
\
NGC925 & $<$1.0 & 