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Subsections



14.18 Point Spread Function Corrections


Description Parameter:	 Section 4.5.2
Processing Level:	 AAR
Usage in processing:	 Section 8.4.6, 8.4.7
File Type:		 FITS Image (PPPSF), Binary FITS table (PCPSF)
Units:			 dimensionless
File Names:		 PPPSF, PCPSF 

This calibration product lists for each wavelength band of PHT-P the fraction of the point source power that passes a given aperture size. The correction factors are needed in the conversion from power on the detector in $[W]$ to point source flux in [Jy].

For the C100 and C200 detector arrays a separate Cal-G file is available which contains the fraction of point source power falling (1) on the entire array and (2) on a single pixel.


14.18.1 Product PPPSF: PHT-P point spread function corrections

NAXIS = 2
TYPE = R*4


AXIS	Length	Description
1	14	Corrections: for 14 P-apertures
2	14	Filter wheel positions


14.18.2 Product PCPSF: PHT-C point spread function corrections

Binary FITS table with record length 12. The record fields are:


Field	 Offset	Number  Type Description
PCPSFFIL 0 	 1 	I*4  Filter (CHW position)
PCPSFPIX 4 	 1 	R*4  PSF correction per pixel
PCPSFARR 8 	 1 	R*4  PSF correction for array


next up previous contents index
Next: 14.19 PHT-S Wavelength and Up: 14. Calibration-G Products Previous: 14.17 Wavelength Dependent Detector
ISO Handbook Volume IV (PHT), Version 2.0.1, SAI/1999-069/Dc