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Timestamp:
Oct 2, 2009, 3:12:47 PM (17 years ago)
Author:
eugene
Message:

check in changes from gene@development branch : extensive changes to moments calculation, psf model generation, aperture residuals; improvements to extended source analysis

File:
1 edited

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  • trunk/psphot/doc/notes.20090523.txt

    r24993 r25755  
     1
     220090809 : more on extended sources:
     3
     4 my algorithm for getting the petrosian radii and fluxes is:
     5
     6  * measure radial profile by interpolation to specific locations along the radial line
     7    (at low radii, this gives much more accurate results; at high radii, we may need to
     8    average a group of pixels -- say, for 15 deg separations, choose a box that is
     9    < 5 degree in width -- this is > 1 pixel at a distance of 12 pixels.
     10
     11    psphotRadialProfilesByAngle
     12
     13  * find intersection of profile with isophot
     14
     15    psphotRadiusFromProfile -> r50(theta)
     16
     17  * generate r50x, r50y and fit to ellipse
     18
     19    psphotEllipticalContour
     20
     21  * generate elliptical profile
     22
     23    psphotEllipticalProfile
     24
     25  * convert to \alpha r_i < r < \beta r_i bins
     26
     27    psphotPetrosianRadialBins
    128
    22920090725 : extended source radial profiles
    … …  
    5481    *** get rest of math from my notebook...
    5582
    56 
    57 
    588320090525 : some clarity of issues:
    5984
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