[REDMINE1D-127] [RM-7695] implement FASTISM Created: 13/Jun/23  Updated: 24/Aug/23

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


 Description   

Created on 2022-11-28 08:30:13 by Didier Vibert. % Done: 0

like the fastIgm processing:

  • check the wavelength above which the ISM extinction is not applicable (=1.0) and thus if this wavelength limit is not observable at a given z do not loop on all ism coeffs
  • if the wavelength limit is observable at a given z, do the chi2 computation on the wavelength range above the limit only once for all the ism coeffs.

This improvement of cpu time, is already done for IGM, since not applicable above 1216, restframe: just mimick the code "fastigm" for ism

 Comments   
Comment by Redmine-Jira Migtation [ 24/Aug/23 ]

Comment by Vincent Le Brun on 2022-12-01 07:42:27:
It will be a little bit more complicated, because the core ISM curve continuously evolves from 100000 A down to 0, there is no value above which the absorption is equal to 1. Then the cut should be adapted using the variance of the spectrum and a S/N cut valu to assess where the ISM effect would be effective

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