Changes between Version 9 and Version 10 of staticsky.20120706_excess_detections

Timestamp:

Mar 1, 2013, 5:23:46 PM (14 years ago)

Author:

watersc1

Comment:

--

staticsky.20120706_excess_detections

@@ -1 +1 @@
 = This page discusses stacks with an excess in false detections in LAP.!ThreePi.20120706 =
 
+== 2013-03-01 ==
 
+Manually running this example stack has clarified what the issue with the variance is.  Bill was correct, it is a result of the matching chi^2 and the additional variance term.  
+
+|| Input || FWHM    ||chi^2 || Additional variance || (972,3213) || V(972,3213) || (884,3265) || V(884,3265) ||
+|| 0     || 5.332783||5395.50||  4787.18 || ||                 || || ||
+|| 2     || 5.689657||5374.62||  4282.85 || ||                 || || ||
+|| 5     || 5.963408||907.50 ||   850.50 || ||                 || -13.086 || 346.278 ||
+|| 6     || 3.478929||51509.4|| 54182.36 || ||                 || -17.9202|| 155.293 ||
+|| 7     || 3.615155||33226.6|| 33780.03 || 9.52773 || 12495.2 || -16.7375|| 215.064 ||
+|| 8     || 4.698586||20865.3|| 21285.99 || 4.9748  || 186.379 || 15.2201 || 197.564 ||
+|| 9     || 5.650547||17460.7|| 20780.80 || 3.722   || 169.304 || 2.9522  || 145.223 ||
+|| 10    || 4.001874||17468.4|| 20932.79 || -15.2837|| 158.531 || 14.0066 || 132.417 ||
+|| 11    || 5.165414||18516.5|| 18769.16 || -16.5952|| 135.316 || -16.5952|| 200.629 ||
+
+|| Input || (972,3213) || V(972,3213) || (884,3265) || V(884,3265) ||
+|| 5     || || ||                  676.53 || 258444.42 ||
+|| 6     || || ||                  8735.83|| 22301894.00||
+|| 7     || || ||                  1249.08|| 13243309.00||
+|| 8     ||1752.03|| 3668812.75 || || ||
+|| 9     ||1338.07||11448818.00||  -47.18|| 10986685.00||
+|| 10    ||-1217.08|| 7237640.00|| -4041.17|| 6502667.00||
+|| 11    ||2353.00|| 4089177.00 ||  || ||
 
 == 2013-02-27 ==
@@ -54 +76 @@
 Here is a copy of the log file for the stack. Input 5 has a much lower "matching chisq" and "additional variance" than
 the other inputs [wiki:stk_1715750.log]
-