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[PIPE2D-729] SuNSS biases show lines Created: 17/Feb/21 Updated: 05/Mar/21 Resolved: 05/Mar/21 |
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| Status: | Won't Fix |
| Project: | DRP 2-D Pipeline |
| Component/s: | None |
| Affects Version/s: | None |
| Fix Version/s: | None |
| Type: | Story | Priority: | Normal |
| Reporter: | hassan | Assignee: | cloomis |
| Resolution: | Won't Fix | Votes: | 0 |
| Labels: | SuNSS | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Attachments: |
Screen Shot 2021-02-16 at 8.15.41 PM.png
Screen Shot 2021-02-16 at 9.13.10 PM.png
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| Story Points: | 2 |
| Sprint: | 2DDRP-2021 A 2, 2DDRP-2021 A3 |
| Reviewers: | hassan |
| Description |
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Recent bias exposures taken from SuNSS show lines that appear for all fibers. See for example This may be due to incorrect wiping of the CCDs, eg by not running the parallel clocks. The actual source of these lines may be work/room lamps being left on during data acquisition. Find the cause for the lines and fix. |
| Comments |
| Comment by rhl [ 17/Feb/21 ] |
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Ummh, that's a 10s exposure, so it's not mysterious that there should be spectral features from Hg lamps in the dome. The weird thing is the r-band biases such as 45775 which also show what look like lines, despite the fact that there should be no time when we're not running the parallels. |
| Comment by hassan [ 17/Feb/21 ] |
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Yes, indeed sorry - here is the visit=45775 r-band image : |
| Comment by rhl [ 05/Mar/21 ] |
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These are real Hg lines. There are c. 3s of "staring" time during the readout (cf. |
