Bug #1133
Deadtime correction has been applied twice for Npred computation of non-point source models in CTA response
| Status: | Closed | Start date: | 02/05/2014 | |
|---|---|---|---|---|
| Priority: | Immediate | Due date: | ||
| Assigned To: |  Knödlseder Jürgen | % Done: | 100% | |
| Category: | - | |||
| Target version: | 00-08-01 | |||
| Duration: |
Description
It turned out that in the Npred computation for radial, elliptical and diffuse models, the deadtime correction was applied twice for the CTA response. First it is applied in GCTAResponse::npred, which computes Npred for a point source. The Npred computation for the non-point sources all call GCTAResponse::npred, hence by calling this method the deadtime correction is applied.
However, GCTAResponse::npred_radial, GCTAResponse::npred_elliptical and GCTAResponse::npred_diffuse all applied the deadtime correction on their own, leading to a double application of the deadtime correction. This reduces Npred by the deadtime correction (typically 5%), resulting in a too large flux.
It is not clear whether there is any link to issue #1131 (as this concerns the binned response computation for which Npred is not used).
Recurrence
No recurrence.
Related issues
History
#1
Updated by Knödlseder Jürgen about 10 years ago
- Description updated (diff)
#2
Updated by Knödlseder Jürgen about 10 years ago
- Status changed from New to In Progress
- % Done changed from 0 to 50
Still want to do a pull distribution to validate that now everything is okay.
#3
Updated by Knödlseder Jürgen about 10 years ago
- Status changed from In Progress to Feedback
- % Done changed from 50 to 100
Pull distributions are now okay (will be posted once completed).
#4
Updated by Knödlseder Jürgen about 10 years ago
- Status changed from Feedback to Closed