Calibration Access and Data Handbook

Input

rawX, rawY

centre of the PSF map specified in the PIXCOORD reference system (real)

nPixelsNegX, nPixelsPosX, nPixelsNegY, nPixelsPosY

parameters to define the extent of the PSF map in the PIXCOORD system (integer). The map will cover the detector range from:
(rawX - nPixelsNegX:rawX+nPixelsPosX, rawY - nPixelsNegY:rawY+nPixelsPosY)

xRes, yRes

resolution of PSF map (integer) (units: PSF bins per subpixel (xRes, yRes $\ge$1)).
The output array will be of the dimension:
( (nPixelsNegX+nPixelsPosX+1)*xRes,(nPixelsNegY+nPixelsPosY+1)*yRes)

countFrameRateRatio

This parameter is equivalent to the average count rate in the region of r=4 subpixel (TBC) around the source. The parameter is used to select the PSF with the appropriate shape, as the shape changes due to coinciding events with increasing count rate. Units are counts/subpixel/CCD-frame.