Feature #1037

Implement ctools to combine run-wise IRFs for fast binned likelihood analysis

Added by Deil Christoph almost 11 years ago. Updated over 10 years ago.

Status:ClosedStart date:12/11/2013
Priority:NormalDue date:
Assigned To:Lu Chia-Chun% Done:

100%

Category:-
Target version:00-08-00
Duration:

Description

In HAP we usually combine all runs into total counts and exposure and exposure-averaged PSF before fitting the morphology and spectrum.

This looses some information, but means a factor 100 speed-up for a binned likelihood fit for 100 runs.
Plus there might be problems with having too many free background parameters when fitting per-run data with per-run IRFs.

So we should develop ctools to combine IRFs (and maybe counts).
As a start it could be a two-page Python script ... it’s basically summing up.

In optical and X-ray astronomy this is known as co-adding, and there are e.g. tools to co-add PHA, ARF and RMF files in CIAO:
Example and explanation of tool: http://cxc.harvard.edu/ciao/threads/coadding/
Formulae: http://cxc.harvard.edu/ciao/download/doc/combine.pdf

Recurrence

No recurrence.

History

#1 Updated by Deil Christoph almost 11 years ago

  • Subject changed from Implement ctools to combine run-wise event lists and IRFs to Implement ctools to combine run-wise IRFs for fast binned likelihood analysis
  • Description updated (diff)

#2 Updated by Knödlseder Jürgen almost 11 years ago

  • Target version set to 2nd coding sprint

#3 Updated by Deil Christoph almost 11 years ago

  • Description updated (diff)

#4 Updated by Deil Christoph almost 11 years ago

  • Description updated (diff)

#5 Updated by Knödlseder Jürgen almost 11 years ago

  • Status changed from New to In Progress

#6 Updated by Lu Chia-Chun over 10 years ago

  • Status changed from In Progress to Resolved

Replaced by #1249 #1250

#7 Updated by Knödlseder Jürgen over 10 years ago

  • Target version changed from 2nd coding sprint to 00-08-00

#8 Updated by Knödlseder Jürgen over 10 years ago

  • Status changed from Resolved to Closed
  • % Done changed from 0 to 100

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