[REDMINE1D-179] [RM-6542] Perform the second pass without templates ratio Created: 13/Jun/23  Updated: 13/Jan/24

Status: Open
Project: 1D Redmine
Component/s: None
Affects Version/s: None
Fix Version/s: None

Type: Task Priority: Normal
Reporter: Redmine-Jira Migtation Assignee: Redmine-Jira Migtation
Resolution: Unresolved Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Attachments: PNG File 39633463510306959_spec.png    

 Description   

Created on 2021-06-16 11:16:49 by Vincent Le Brun. % Done: 0

There are some extreme objects which are not well represented by the emission lines ratio templates, which gives wrong solutions for easy objects. As the correct solution is always among the 5 solutions from the firs pass, the second pass should be performed in free mode (except for the doublet ratio and probably the Balmer and ratioline rules).
depending on tests results, this could be as a function of SNR, is low SNR spectra still require template ratio to avoid too many free parameters in the fit

 Comments   
Comment by Redmine-Jira Migtation [ 13/Jan/24 ]

Comment by Vincent Le Brun on 2023-08-29 15:40:07:
un ticket qui est resté dans les limbes, à discuter si il est pertinent ...

Comment by Redmine-Jira Migtation [ 13/Jan/24 ]

Comment by Vincent Le Brun on 2024-01-09 16:47:08:
Un exemple parfait de cas de ratio qui n'est pas dans nos templates et qui fait planter le solver, avec un doublet NII beaucoup plus fort que H-alpha, alors que les ratios H-alpha/OIII par exemple sont OK

la bonne solution n'est pas la première, les ratios ont fait que H-alpha est placé sur la raie NII la plus forte...

Comment by Redmine-Jira Migtation [ 13/Jan/24 ]

Comment by Didier Vibert on 2024-01-12 16:46:37:
should wait multiobs #6028

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