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Changes between Version 9 and Version 10 of staticsky.20120706


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Timestamp:
Dec 8, 2012, 11:30:17 AM (14 years ago)
Author:
bills
Comment:

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  • staticsky.20120706

    v9 v10  
    4444that are not matched with a detection in another band while detections for the other filters must match 2 other bands
    4545before forced photometry is done.
    46  
     46 [[BR]]
     47
    4748If we plot the ratio of the number of matched detections to the number of detected sources for each band we can see these outliers.
    4849The following plots shows the ratio for the r band versus that in the ratio in i band for each stack. The plot on the left shows the full range
    4950including the outliers wile the plot on the right zooms in on the values near zero.
    5051[[Image(mdr.jpg)]] [[Image(mdrzoom.jpg)]]
     52[[BR]]
    5153
    5254The plots for g and z show the same shape while the y band plot does not show the tail.
     
    5658We propose re-running psphotStack for these skycells changing the rule that matched detections are created for all unmatched y band
    5759detections if some criteria is met. We can get rid of the worst of the outliers with the cut. This effect is seen in 3% of the skycells
    58 north of 20 degrees declination
     60north of 20 degrees declination.
     61[[BR]]
     62
    5963{{{
    6064             Nmatched_i / NDetected_i > 0.4 && Nmatched_r /  NDetected_r > 0.6
    6165}}}
     66[[BR]]
    6267
    6368[[Image(mdr_cut.jpg)]]