[REDMINE1D-146] [RM-7129] spike rejection: try with smaller LSF size 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: yuki.moritani 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 2022-03-15 15:40:20 by Didier Vibert. % Done: 0

to reject solutions with unflagged hot pixels (or cosmics) one could test LSF sizes smaller than the given LSF size, when fitting for the best velocity.

one could for instance use a negative velocity dispersion and handle it in the linewidth computation (@CLineModelElement::GetLineWidth@) by reducing the profile size by : @- lambda*v^2/c@ instead of adding this term to the LSF size.

Note of course this will work only if the input LSF size is correct.

at the end: if a candidate corresponds to a negative velocity (or a velocity < to a given threshold) raise a warning or re-estimate all by flagging the concerned pixels (thus need to find those pixels, with the strongest line ? )



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

Comment by Vincent Le Brun on 2022-03-15 15:50:53:
not sure we need to check for negative values, a zero one should be enough, as 0 is not an expected value for a galaxy. That was the spirit of the prior, tuned to avoid fitting with 0 value

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