Feature #604
Allow fitting for point source positions in Fermi-LAT analysis
Status: | Closed | Start date: | ||
---|---|---|---|---|
Priority: | Normal | Due date: | ||
Assigned To: | Knödlseder Jürgen | % Done: | 100% | |
Category: | - | |||
Target version: | 1.5.0 | |||
Duration: |
Description
So that, the positions of point source cannot be fitted in the Fermi-LAT analysis. Fitting should be enabled.
There are two approaches, a fast and easy (but less precise approach) and an exact but slower approach.
The PSF for point sources are precomputed using the GLATMeanPsf
class. Formally, the content of GLATMeanPsf
depends on the precise position of the source, but if the position is only changed slightly, the content should not really change. We could this adopt the response class so that the actual position and the position for which GLATMeanPsf
was computed could differ. This is the fast and easy way.
The exact way would be to recompute the content of GLATMeanPsf
each time the position is changed. This takes some computing time, but maybe it’s not so expensive at the end. At least, this method would be exact.
We could test both and compare the speeds and precisions.
Recurrence
No recurrence.
Related issues
History
#1 Updated by Knödlseder Jürgen about 12 years ago
- Subject changed from Allow fitting for point sources in Fermi-LAT analysis to Allow fitting for point source positions in Fermi-LAT analysis
- Description updated (diff)
#2 Updated by Knödlseder Jürgen over 8 years ago
- Target version set to 1.2.0
#3 Updated by Knödlseder Jürgen almost 8 years ago
- Target version changed from 1.2.0 to 1.3.0
#4 Updated by Knödlseder Jürgen over 7 years ago
- Target version deleted (
1.3.0)
#5 Updated by Knödlseder Jürgen about 7 years ago
- Related to Bug #2183: All pixels have the same TS value for Fermi-LAT analysis using cttsmap added
#6 Updated by Knödlseder Jürgen about 7 years ago
- Status changed from New to Closed
- Assigned To set to Knödlseder Jürgen
- Target version set to 1.5.0
- % Done changed from 0 to 100