Exemplo n.º 1
0
/***********************************************************************//**
 * @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;
 
}
Exemplo n.º 2
0
/***********************************************************************//**
 * @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;
}