/***********************************************************************//**
* @brief Test unbinned observation handling
***************************************************************************/
void TestGCTAObservation::test_unbinned_obs(void)
{
// Set filenames
const std::string file1 = "test_cta_obs_unbinned.xml";
// Declare observations
GObservations obs;
GCTAObservation run;
// Load unbinned CTA observation
test_try("Load unbinned CTA observation");
try {
run.load_unbinned(cta_events);
run.response(cta_irf,cta_caldb);
test_try_success();
}
catch (std::exception &e) {
test_try_failure(e);
}
// Add observation (twice) to data
test_try("Load unbinned CTA observation");
try {
obs.append(run);
obs.append(run);
test_try_success();
}
catch (std::exception &e) {
test_try_failure(e);
}
// Loop over all events using iterators
int num = 0;
for (GObservations::iterator event = obs.begin(); event != obs.end(); ++event) {
num++;
}
test_value(num, 8794, 1.0e-20, "Test observation iterator");
// Loop over all events using iterator
num = 0;
GCTAEventList *ptr = static_cast<GCTAEventList*>(const_cast<GEvents*>(run.events()));
for (GCTAEventList::iterator event = ptr->begin(); event != ptr->end(); ++event) {
num++;
}
test_value(num, 4397, 1.0e-20, "Test event iterator");
// Test XML loading
test_try("Test XML loading");
try {
obs = GObservations(cta_unbin_xml);
obs.save(file1);
test_try_success();
}
catch (std::exception &e) {
test_try_failure(e);
}
// Exit test
return;
}
/***********************************************************************//**
* @brief Bin events into a counts map
*
* @param[in] obs CTA observation.
*
* @exception GException::no_list
* No event list found in observation.
* @exception GCTAException::no_pointing
* No valid CTA pointing found.
*
* This method bins the events found in a CTA events list into a counts map
* and replaces the event list by the counts map in the observation. The
* energy boundaries of the counts map are also stored in the observation's
* energy boundary member.
*
* If the reference values for the map centre (m_xref, m_yref) are 9999.0,
* the pointing direction of the observation is taken as the map centre.
* Otherwise, the specified reference value is used.
***************************************************************************/
void ctbin::bin_events(GCTAObservation* obs)
{
// Continue only if observation pointer is valid
if (obs != NULL) {
// Make sure that the observation holds a CTA event list. If this
// is not the case then throw an exception.
if (dynamic_cast<const GCTAEventList*>(obs->events()) == NULL) {
throw GException::no_list(G_BIN_EVENTS);
}
// Setup energy range covered by data
GEnergy emin;
GEnergy emax;
GEbounds ebds;
emin.TeV(m_emin);
emax.TeV(m_emax);
ebds.setlog(emin, emax, m_enumbins);
// Get Good Time intervals
GGti gti = obs->events()->gti();
// Get map centre
double xref;
double yref;
if (m_xref != 9999.0 && m_yref != 9999.0) {
xref = m_xref;
yref = m_yref;
}
else {
// Get pointer on CTA pointing
const GCTAPointing *pnt = obs->pointing();
if (pnt == NULL) {
throw GCTAException::no_pointing(G_BIN_EVENTS);
}
// Set reference point to pointing
if (toupper(m_coordsys) == "GAL") {
xref = pnt->dir().l_deg();
yref = pnt->dir().b_deg();
}
else {
xref = pnt->dir().ra_deg();
yref = pnt->dir().dec_deg();
}
} // endelse: map centre set to pointing
// Create skymap
GSkymap map = GSkymap(m_proj, m_coordsys,
xref, yref, m_binsz, m_binsz,
m_nxpix, m_nypix, m_enumbins);
// Initialise binning statistics
int num_outside_map = 0;
int num_outside_ebds = 0;
int num_in_map = 0;
// Fill sky map
GCTAEventList* events = static_cast<GCTAEventList*>(const_cast<GEvents*>(obs->events()));
for (GCTAEventList::iterator event = events->begin(); event != events->end(); ++event) {
// Determine sky pixel
GCTAInstDir* inst = (GCTAInstDir*)&(event->dir());
GSkyDir dir = inst->dir();
GSkyPixel pixel = map.dir2xy(dir);
// Skip if pixel is out of range
if (pixel.x() < -0.5 || pixel.x() > (m_nxpix-0.5) ||
pixel.y() < -0.5 || pixel.y() > (m_nypix-0.5)) {
num_outside_map++;
continue;
}
// Determine energy bin. Skip if we are outside the energy range
int index = ebds.index(event->energy());
if (index == -1) {
num_outside_ebds++;
continue;
}
// Fill event in skymap
map(pixel, index) += 1.0;
num_in_map++;
} // endfor: looped over all events
// Log binning results
if (logTerse()) {
log << std::endl;
log.header1("Binning");
log << parformat("Events in list");
log << obs->events()->size() << std::endl;
log << parformat("Events in map");
log << num_in_map << std::endl;
log << parformat("Events outside map area");
log << num_outside_map << std::endl;
log << parformat("Events outside energy bins");
log << num_outside_ebds << std::endl;
}
// Log map
if (logTerse()) {
log << std::endl;
log.header1("Counts map");
log << map << std::endl;
}
// Create events cube from sky map
GCTAEventCube cube(map, ebds, gti);
// Replace event list by event cube in observation
obs->events(&cube);
} // endif: observation was valid
// Return
return;
}