Changes between Version 7 and Version 8 of Kron_measurements_investigation

Timestamp:

May 16, 2012, 3:12:21 PM (14 years ago)

Author:

bills

Comment:

--

Kron_measurements_investigation

@@ -91 +91 @@
 
 === Statistics ===
+
+
+{{{
+Statistics for various recipe combinations
+------------------------------------------
+
+Fractional Difference in Kron Radius
+
+( KR_SExtractor - KR_psphot ) / KR_Sextractor    All KR
+
+Recipe                       mean       stdev      min     max         median      Npts
+-------------------------------------------------------------------------------------------
+default                  -0.201895    0.490706  -20.0476 0.924053    -0.103559     113705
+nowin                    -0.2036380   0.689935 -165.129  0.909       -0.253494     113701
+noweight                 -0.245435    0.83742  -129.597  0.900042    -0.143933     112929
+noweight.nowin           -0.245726    0.834698 -129.597  0.948736    -0.226174     112930
+nosmooth.noweight.nowin  -0.123882    0.830385 -101.242  0.921227     0.00175791   113087
+
+Mean and meidan Kron raddii are closest to SExtractor with all of our various recipe choices off but
+the standard deviation is lowest with our default recipe. This set of objects includes
+small values of KR which psphot does not measure well (Minimum KR_psphot in this sampe is 7.1)
+
+
+( KR_SExtractor - KR_psphot ) / KR_Sextractor   KR_SE > 10
+
+Recipe                       mean       stdev      min       max      median      Npts
+-------------------------------------------------------------------------------------------
+default                 -0.0250245    0.22567    -4.66826  0.924053 -0.032233    42142
+nowin                   -0.0257794    0.2263675  -4.576    0.909    -0.0291643   42140
+noweight                -0.0402723    0.287004   -3.22148  0.900042 -0.0437856   42074
+noweight.nowin          -0.0410538    0.287949   -4.44391  0.948736 -0.0435108   42078
+nosmooth.noweight.nowin  0.0934499    0.53906  -101.242    0.921227  0.00175791  42138
+
+Considering sources with SE kron radii above 10  the smallest stdev is also with the default recipe.
+The window function appears to have has little effect on the statistics. The biggest improvement is provided
+by the smoothing
+
+---------------------------------------------------------------------------------------------------------------
+Kron Magnitude
+
+KM_SExtractor - KM_psphot      All KR
+
+Recipe                       mean       stdev      min    max   median     Npts
+--------------------------------------------------------------------------------
+default                   0.0144785  0.192932   -5.144   4.495  0.003226 113705
+nowin                     0.0150963  0.1902736  -3.777   4.584  0.002172 113701
+noweight                 -0.0860446  0.700536   -8.964   4.529 -0.004648 112929
+noweight.nowin            0.0131     0.220402   -5.862   4.514  0.00044  112930
+nosmooth.noweight.nowin  -0.014707   0.215786   -5.733   4.725 -0.03339  113087
+
+
+KM_SExtractor - KM_psphot      KR_SE > 10 pixels
+
+Recipe                       mean      stdev       min     max  median     Npts
+--------------------------------------------------------------------------------
+default                  -0.0229234  0.172541    -5.144  4.139 -0.001218  42142
+nowin                    -0.0217864  0.1680391   -3.777  4.584 -0.0061890 42140
+noweight                 -0.12206    0.674331    -7.844  3.337 -0.006119  42074
+noweight.nowin           -0.0268161  0.187884    -4.832  4.514 -0.000118  42078
+nosmooth.noweight.nowin  -0.065724   0.175386    -4.684  4.725 -0.035954  42138 
+
+
+}}}