Eirik Hatlen / ctools

Commit e3a8d38e19eb09fa48c6c76901ad235b4265273e

Authored by Josh Cardenzana
Committed by Jürgen Knödlseder
1 parent bac73c21

Add requirement for minimum number of events in a time bin for background consideration (#2713)

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Showing 2 changed files with 15 additions and 3 deletions
src/ctfindvar/ctfindvar.cpp
  View file @e3a8d38
... ... @@ -421,11 +421,19 @@ void ctfindvar::get_variability_sig(const int& pix_number,
421 421 for (int i=0; i< nbins; i++) //looping over all the GTIs of the pixel
422 422 {
423 423 alpha=0;
424   - if (accepted_bin_bckg_vector[i]==0) continue; //the GTI is discared from bckg calculation and not checked again.
  424 + //the GTI is discared from bckg calculation and not checked again.
  425 + if (accepted_bin_bckg_vector[i]==0) {
  426 + continue;
  427 + }
  428 + // Check if bin fails minoff check
  429 + else if (m_counts(pix_number, i) < m_minoff) {
  430 + accepted_bin_bckg_vector[i]=0;
  431 + continue;
  432 + }
425 433 int background_count=0;
426 434 for (int j=0;j<nbins;j++) // for one GTI selected (i), looping over all the others (j).
427 435 {
428   - if (j!=i &&accepted_bin_bckg_vector[j]==1)
  436 + if (j!=i && accepted_bin_bckg_vector[j]==1)
429 437 {
430 438 background_count+= m_counts(pix_number, j);
431 439 alpha++;
... ... @@ -436,7 +444,7 @@ void ctfindvar::get_variability_sig(const int&amp; pix_number,
436 444 non = m_counts(pix_number, i);
437 445 noff = background_bin_array[i];
438 446 alpha = (1./alpha);
439   -
  447 +
440 448 /////////////////////////////////////////////////////////////////////////////////
441 449 // Compute sensitivity in Gaussian sigma
442 450 double alpha1 = alpha + 1.0;
... ... @@ -643,6 +651,9 @@ void ctfindvar::get_parameters(void)
643 651 m_emin = GEnergy((*this)["emin"].real(), "TeV");
644 652 m_emax = GEnergy((*this)["emax"].real(), "TeV");
645 653  
  654 + // Get minimum counts for a bin to be considered in Noff calculation
  655 + m_minoff = (*this)["minoff"].real();
  656 +
646 657 // Write parameters into logger
647 658 log_parameters(TERSE);
648 659  
... ...
src/ctfindvar/ctfindvar.hpp
  View file @e3a8d38
... ... @@ -89,6 +89,7 @@ protected:
89 89 GSkyMap m_counts; //!< Counts for each time interval
90 90 GGti m_gti; //!< List of time intervals
91 91 GModels m_inmodel; //!< List of models for source positions
  92 + double m_minoff; //!< Minimum counts for use in significance calculation
92 93 GSkyMap m_peaksigmap; //!< Skymap holding the maximum significance
93 94 GNdarray m_pixsigsrc; //!< Store distributions of the source significances
94 95 GNdarray m_pixsigmax; //!< Store distribution for pixel with max significance
... ...