Details
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Type:
Epic
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Status: Done
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Resolution: Done
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Fix Version/s: None
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Component/s: None
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Labels:
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Epic Name:KPM: TE1, FY15
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WBS:02C.04
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Team:Data Release Production
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Cycle:Summer 2015
Description
This will be measured on precursor data (almost certainly from HSC, via DM-2380) using the following procedure:
- Run visit-level processing (i.e. ProcessCcdTask, probably via the new HSC driver ported on
DM-3368). - Compute the residual ellipticity correlation function separately in each visit. Bob Armstrong has code we can probably use for this (and will be at LSST2015 to help). The stile project (https://github.com/msimet/Stile) may be another solution (and perhaps a better long-term one).
- Compute the median correlation function (at separation bins) over multiple visits.
This will be done in whichever of r or i band has better public HSC data.
The same measurement procedure will be used for TE2 (DLP-308) in S15 (DM-3047).
Attachments
Issue Links
- is blocked by
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DM-3895 Provide values for PSF ellipticity KPMs in FY15
- Done
- is contained by
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DM-23539 Incorporate Rowe statistics
- Done
- relates to
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DM-8951 Add TE1 and TE2 KPMs to validate_drp using code developed in DM-3040
- Done
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DLP-290 Residual PSF Ellipticity Correlations: TE1
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- Closed
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(1 mentioned in)
The data used in this KPM was the i-band single visit data from the public HSC engineering run.
To create the plot I took the stars from each visit that were selected for the psf modeling and computed the difference in ellipticities between the model of the psf and the sdss moments. I then computed the average dot product of the residuals for all pairs of stars at different separation distances.
Once this was computed for each visit I then took the median from all of the i-band visits to create the points in the plot.
Reading off the plot, the residual correlations are:
DM-3047) requirement: 500e-5Both of these are well below the requiremnt