Feature #1037
Implement ctools to combine run-wise IRFs for fast binned likelihood analysis
| Status: | Closed | Start date: | 12/11/2013 | |
|---|---|---|---|---|
| Priority: | Normal | Due 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 about 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 about 11 years ago
- Target version set to 2nd coding sprint
#3
Updated by Deil Christoph about 11 years ago
- Description updated (diff)
#4
Updated by Deil Christoph about 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
#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