[PIPE2D-735] Offset in x direction with 2d subtraction Created: 23/Feb/21 Updated: 24/Feb/21 Resolved: 24/Feb/21 |
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| Status: | Done |
| Project: | DRP 2-D Pipeline |
| Component/s: | None |
| Affects Version/s: | None |
| Fix Version/s: | None |
| Type: | Task | Priority: | Normal |
| Reporter: | ncaplar | Assignee: | Unassigned |
| Resolution: | Done | Votes: | 0 |
| Labels: | None | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Issue Links: |
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| Description |
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sky subtraction algorithm via reduceExposure seems to be off. I believe the offset is one 1 pixel and it happened after The quality of `reduceArc` is nominally quite good: reduceArc.fitDetectorMap INFO: Final fit: chi2=2557.440734 dof=2226 xRMS=0.017001 yRMS=0.017363 (0.001489 nm, 0.555814 km/s) from 1141/1336 lines reduceArc.fitDetectorMap INFO: Fit quality from reserved lines: chi2=928.660422 xRMS=0.032308 yRMS=0.019853 (0.001702 nm, 0.635527 km/s) from 148 lines (10.0%) reduceArc.fitDetectorMap INFO: Softening errors by 0.012173 pixels (0.001044 nm, 0.389680 km/s) to yield chi^2/dof=1 reduceArc.fitDetectorMap INFO: Softened fit: chi2=2224.912406 dof=2226 xRMS=0.017772 yRMS=0.018198 (0.001560 nm, 0.582562 km/s) from 1141/1484 lines reduceArc.fitDetectorMap INFO: Softened fit quality from reserved lines: chi2=765.254110 xRMS=0.032082 yRMS=0.019945 (0.001710 nm, 0.638479 km/s) from 148 lines (10.0%) The detrened image I have been looking at is /projects/HSC/PFS/Subaru/rerun/ncaplar/Feb_11_2021/rerun/ncaplar/detrend/calExp/2020-11-14/v034445/calExp-SA034445r1.fits The 2dsubtracted image is at: /projects/HSC/PFS/Subaru/rerun/ncaplar/Feb_11_2021/rerun/ncaplar/calibs/sky2d_improved_dm/calExp/2020-11-14/v034445/calExp-SA034445r1.fits
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| Comments |
| Comment by ncaplar [ 24/Feb/21 ] |
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After discussion on Slack, this problem was solved after rerun with the detectorMap that @price updated in |