CXC Optics>Raytracing Chandra>SAOTrace>Source Definitions>Source Extent Functions>Point Extent Function
[Last Change: 15 Feb 2012 (rev 6)]

point Source Extent Function

point is a simplified SAOTrace source extent interface function which simulates a point source.

It takes a single argument, a table, with the following recognized named entries:

name type description default
position position specification source position on optical axis
spectrum spectrum specification source spectrum  
For example,

<noautolink>point.png</noautolink>
point{
    position = { ra = '7:57:47.348',
                 dec = '-60:47:15.46',
                 ra_aimpt = 1.1953549452648E+02,
                 dec_aimpt = -6.0763660833014E+01
               },
    spectrum ={ { type = "flat", emin = 0.2, emax = 10.0 } }

}


 
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