[PIPE2D-1254] Normalization with different number of arms Created: 12/Jul/23  Updated: 13/Jul/23

Status: Open
Project: DRP 2-D Pipeline
Component/s: None
Affects Version/s: None
Fix Version/s: None

Type: Bug Priority: Normal
Reporter: vlebrun Assignee: Masayuki Tanaka
Resolution: Unresolved Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Attachments: PNG File Normalistion.png     File pipe2d-1254.ipynb     PNG File pipe2d-1254-pfsSingle.png    

 Description   

On this spectrum ( 00004-00001-1,1-123544900227300-005-1a22e5383556526b, taken during Run11, visits  92557, 92558, 92560, 92561, 92562, the first 2 visits were made with SM1 (hence with 3 arms) and the last 3 with SM3 (with only b  and {{r }}) .It lead to a differential normalization between the b+r arms and the n one. 



 Comments   
Comment by price [ 13/Jul/23 ]

This is due to a failure in flux calibration rather than a problem with coadding different spectrographs in different observations. (It's just showing up because of the pattern of observations).
Here are the pfsSingle (flux-calibrated single exposures) spectra for this object:

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