Changes between Version 15 and Version 16 of staticsky.20120706_excess_detections

Timestamp:

Mar 4, 2013, 6:15:20 PM (13 years ago)

Author:

watersc1

Comment:

--

staticsky.20120706_excess_detections

@@ -30 +30 @@
 Manually running this example stack has clarified what the issue with the variance is.  Bill was correct, it is a result of the matching chi2 and the additional variance term.  Here are the fwhm, chi2, additional variance values for each unrejected input, along with the input pixel values of both the warp and variance for two positions: (972,3213) is in the "good region," where the measured stack image variance matches the value in the variance image; (884, 3265) is in the "bad region," where the observed variance is large.
 
-|| Input || FWHM    ||chi^2 || Additional variance || (972,3213) || V(972,3213) || (884,3265) || V(884,3265) || median(V) ||
-|| 0     || 5.332783||5395.50||  4787.18 || ||                 || || || 177.457 ||
-|| 2     || 5.689657||5374.62||  4282.85 || ||                 || || || 187.196 ||
-|| 5     || 5.963408||907.50 ||   850.50 || ||                 || -13.086 || 346.278 || 354.721 ||
-|| 6     || 3.478929||51509.4|| 54182.36 || ||                 || -17.9202|| 155.293 || 189.998 ||
-|| 7     || 3.615155||33226.6|| 33780.03 || 9.52773 || 12495.2 || -16.7375|| 215.064 || 224.625 ||
-|| 8     || 4.698586||20865.3|| 21285.99 || 4.9748  || 186.379 || 15.2201 || 197.564 || 175.954 ||
-|| 9     || 5.650547||17460.7|| 20780.80 || 3.722   || 169.304 || 2.9522  || 145.223 || 141.512 ||
-|| 10    || 4.001874||17468.4|| 20932.79 || -15.2837|| 158.531 || 14.0066 || 132.417 || 143.609 ||
-|| 11    || 5.165414||18516.5|| 18769.16 || -16.5952|| 135.316 || -16.5952|| 200.629 || 181.723 ||
+|| Input || FWHM    ||chi^2 || Additional variance || (972,3213) || V(972,3213) || (884,3265) || V(884,3265) || median(V) || weight || covarFactor ||
+|| 0     || 5.332783||5395.50||  4787.18 || ||                 || || || 177.457 || 3.54363e-05 || 1 ||
+|| 2     || 5.689657||5374.62||  4282.85 || ||                 || || || 187.196 || 3.43272e-05 || 1 ||
+|| 5     || 5.963408||907.50 ||   850.50 || ||                 || -13.086 || 346.278 || 354.721 || 4.02272e-06 || 1 ||
+|| 6     || 3.478929||51509.4|| 54182.36 || ||                 || -17.9202|| 155.293 || 189.998 || 1.15211e-07 || 1 ||
+|| 7     || 3.615155||33226.6|| 33780.03 || 9.52773 || 12495.2 || -16.7375|| 215.064 || 224.625 || 1.19095e-07 || 1 ||
+|| 8     || 4.698586||20865.3|| 21285.99 || 4.9748  || 186.379 || 15.2201 || 197.564 || 175.954 || 2.59256e-07 || 1 ||
+|| 9     || 5.650547||17460.7|| 20780.80 || 3.722   || 169.304 || 2.9522  || 145.223 || 141.512 || 1.68029e-07 || 1 || 
+|| 10    || 4.001874||17468.4|| 20932.79 || -15.2837|| 158.531 || 14.0066 || 132.417 || 143.609 || 3.18491e-07 || 1 ||
+|| 11    || 5.165414||18516.5|| 18769.16 || -16.5952|| 135.316 || -16.5952|| 200.629 || 181.723 || 2.46035e-07 || 1 || 
 
 The internal values for these pixels from during the rejection phase: