Lili Yang / ctools

Commit d961dc34b47874806cf615a538923a45875c0cb9

Authored by knodlseder
1 parent cd217310

Implement deadtime correction in ctobssim. 

The deadtime is controlled using the deadc parameter. An additional MC process decides whether a photon event or a background event falls within a dead period of the system or not.
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Showing 2 changed files with 11 additions and 3 deletions
ChangeLog
  View file @d961dc3
1   -2012-02-28 Juergen Knoedlseder <jurgen.knodlseder@irap.omp.eu>
  1 +2012-03-08 Juergen Knoedlseder <jurgen.knodlseder@irap.omp.eu>
2 2  
3 3 * Version 0.4.0 released
4 4 ========================
5 5  
6 6 Add handling of observation definition XML files to ctselect, ctbin
7 7 and ctlike
  8 + Add deadtime correction factor to ctobssim
8 9 No longer query output parameters first
9 10 Remove method parameter from ctlike and replace evfile and cntmap
10 11 parameters by infile parameter
... ...
... ... @@ -2,7 +2,7 @@ New Features and Important Changes in ctools 00-04-00
2 2  
3 3 Author(s) : Juergen Knoedlseder
4 4  
5   -February 28, 2012
  5 +March 8, 2012
6 6  
7 7  
8 8 1. Introduction
... ... @@ -32,7 +32,14 @@ statically linked to the ctools library.
32 32  
33 33 4. ctobssim - CTA observation simulation
34 34 ----------------------------------------
35   -None
  35 +Add deadc parameter to control the deadtime correction factor for the
  36 +observation. The deadtime correction factor deadc is the ratio between
  37 +livetime and ontime. A typical value of deadc=0.95 means 5% deadtime.
  38 +
  39 +An additional Monte Carlo process has been introduced for photons and
  40 +background events to select only those events that fall in the livetime
  41 +fraction of the exposure. This means that background rates are expected
  42 +in events per real time (and not events per livetime).
36 43  
37 44  
38 45 5. ctselect - CTA event selection
... ...