[PIPE2D-1151] Boxy feature in observed spectra Created: 20/Jan/23 Updated: 12/Jul/24 Resolved: 11/May/23 |
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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: | Takuji Yamashita | Assignee: | price |
| Resolution: | Done | Votes: | 0 |
| Labels: | None | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Attachments: |
calExp_v82596_1r_crosscut_v49_fID6.png
fiberprofile.png
gatagata_merged_82596.png
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| Issue Links: |
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| Sprint: | Gen3 transition | ||||||||
| Description |
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As reported on slack (https://sumire-pfs.slack.com/archives/C3AU3VCMU/p1673573222493039), we found a boxy (or zigzag) feature in observed spectra taken during the Nov run. This is found mainly in 600-700 nm in red arm, but rarely in blue arm. The boxy feature is found in 3 fibers of 85 FLUXSTD fibers in visit 82596. These features are not always in the same fiberIds in a different visit. They are seen both in pfsMerged and pfsArm. The normalization is smooth in these problematic wavelengths.
Hamano-san found that the problematic fibers have a bright fiber next to them. The boxy features could be leaks from those bright fibers.
There are upturns at the sides in fiberprofile, which could cause this issue.
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| Comments |
| Comment by Kiyoto Yabe [ 11/May/23 ] |
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I believe now the feature is diminished or good profiles are needed for further study, but should we keep this open? |
| Comment by price [ 11/May/23 ] |
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This was addressed by creating better fiberProfiles with |
