[PIPE2D-1185] Underestimated variance in Nov 2022 data Created: 14/Mar/23 Updated: 04/Jul/23 |
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| Status: | Open |
| Project: | DRP 2-D Pipeline |
| Component/s: | None |
| Affects Version/s: | None |
| Fix Version/s: | None |
| Type: | Task | Priority: | Normal |
| Reporter: | Masayuki Tanaka | Assignee: | Unassigned |
| Resolution: | Unresolved | 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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vlebrun reports that the variance is significantly underestimated in the Nov 2022 data. It did not significantly affect the 1d results, but it will certainly affect science analyses down-steam and we need to track down where the underestimated variance comes from. |
| Comments |
| Comment by rhl [ 14/Mar/23 ] |
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You can see that this is a problem directly in the pfsMerged files (I didn't check the pfsArm) by subtracting two visits observed back-to-back and looking at chi^2 |
| Comment by Kiyoto Yabe [ 04/Jul/23 ] |
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price I think you said the variance was actually underestimated. Do you remember the conclusion at that time? |
| Comment by rhl [ 04/Jul/23 ] |
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See also report by Jared |