The data product resulting from a single PO is a "deep sky grid" consisting of eight images representing the signal and the noise in each of the four IRAS wavelength bands; each image is contained in a separate FITS file. There are two kinds of grids for each observation: FLUX mode and INTENSITY (INTN) mode grids. For the FLUX grids, the data are filtered with a zero-sum bandpass filter centered on the point source spatial frequency; the extended emission is suppressed. INTENSITY grids are spatially smoothed but not bandpass filtered. For further details, including a discussion of the uncertainties, the reader is referred to the User's Guide to IRAS Pointed Observation Products.
Reference:
Young, E. T., Neugebauer, G., Kopan, E. L., Benson, R. D.,
Conrow, T. P., Rice, W. L., & Gregorich, D. T. 1985, A User's
Guide to IRAS Pointed Observation Products, IPAC Preprint
PRE-008N.
Version and release date: 1.0, 1985 Oct 25