This task is designed to analyse a region within an XMM image. It calculates values such as a source centroid, optimum extraction radius, source counts and count rate etc. All values are written to standard output where they may be accessed by a calling script. The centroid, source counts and optimum radius are also returned in output parameters where they may be picked up by a calling task. A summary of the output quantities is given in Table 1.
|Counts per image pixel||counts/pixel||-|
|X centroid||det or sky pixels||xcentroid|
|Y centroid||det or sky pixels||ycentroid|
|optimum radius||arcsecs and det/sky pixels||optradius|
|encircled energy factor||-||-|
|Total source counts||counts||-|
|Total source count rate||counts/s||-|