Action #1784

Use of the IRF with different energy bounds with respect to the default

Added by Donnarumma Imma almost 8 years ago. Updated over 7 years ago.

Status:ClosedStart date:05/31/2016
Priority:NormalDue date:
Assigned To:Knödlseder Jürgen% Done:

0%

Category:-
Target version:1.1.0
Duration:

Description

We found that ctobssim does some extrapolation of a given IRF for energy outside the validity range of the IRF itself.
This is clearly a problem because the resulting spectra extend to energy bins where we do not expect to have any significance.
Is it possible to change the code in order to avoid this kind of extrapolation?

Thanks,
Imma & Pere


Recurrence

No recurrence.


Related issues

Related to GammaLib - Bug #1457: GCTAAeff2D effective area interpolation behaves weirdly o... Closed 04/24/2015

History

#1 Updated by Knödlseder Jürgen almost 8 years ago

  • Project changed from ctools to GammaLib

I propose to limit the effective area response always to the energy (and offset angle) range that is specified by the file, hence no extrapolation should be done beyond the boundaries of valid values. The same should also hold for the background rates.

I move this issue to the GammaLib project as the implementation of this change needs to be done at GammaLib level.

#2 Updated by Knödlseder Jürgen almost 8 years ago

  • Target version set to 1.1.0

#3 Updated by Knödlseder Jürgen over 7 years ago

  • Related to Bug #1457: GCTAAeff2D effective area interpolation behaves weirdly outside given fits file range added

#4 Updated by Knödlseder Jürgen over 7 years ago

  • Status changed from New to Closed

The effective area outside the boundaries of the FITS table are now set to zero.

Code has been merged into devel.

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