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import numpy as np |
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from threeML.utils.OGIP.response import InstrumentResponse |
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import h5py |
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class POLARData(object): |
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def __init__(self, polar_hdf5_file, polar_hdf5_response=None, reference_time=0.): |
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""" |
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container class that converts raw POLAR HDF5 data into useful python |
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variables |
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This can build both the polarization and spectral data |
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:param polar_root_file: path to polar event file |
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:param reference_time: reference time of the events (tunix?) |
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:param rsp_file: path to rsp file |
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""" |
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with h5py.File(polar_hdf5_file, 'r') as f: |
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# This gets the spectral response |
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rsp_grp = f['rsp'] |
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matrix = rsp_grp['matrix'].value |
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ebounds = rsp_grp['ebounds'].value |
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mc_low = rsp_grp['mc_low'].value |
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mc_high = rsp_grp['mc_high'].value |
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# open the event file |
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# extract the pedestal corrected ADC channels |
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# which are non-integer and possibly |
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# less than zero |
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pha = f['energy'].value |
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# non-zero ADC channels are invalid |
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idx = pha >= 0 |
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#pha = pha[idx] |
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idx2 = (pha <= ebounds.max()) & (pha >= ebounds.min()) |
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pha = pha[idx2 & idx] |
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# get the dead time fraction |
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self._dead_time_fraction = (f['dead_ratio'].value)[idx & idx2] |
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# get the arrival time, in tunix of the events |
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self._time = (f['time'].value)[idx & idx2] - reference_time |
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# digitize the ADC channels into bins |
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# these bins are preliminary |
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# now do the scattering angles |
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scattering_angles = f['scatter_angle'].value |
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# clear the bad scattering angles |
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idx = scattering_angles != -1 |
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self._scattering_angle_time = (f['time'].value)[idx] - reference_time |
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self._scattering_angle_dead_time_fraction = (f['dead_ratio'].value)[idx] |
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self._scattering_angles = scattering_angles[idx] |
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# build the POLAR response |
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mc_energies = np.append(mc_low, mc_high[-1]) |
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self._rsp = InstrumentResponse(matrix=matrix, ebounds=ebounds, monte_carlo_energies=mc_energies) |
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# bin the ADC channels |
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self._binned_pha = np.digitize(pha, ebounds) |
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# bin the scattering_angles |
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if polar_hdf5_response is not None: |
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with h5py.File(polar_hdf5_response, 'r') as f: |
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scatter_bounds = f['bins'].value |
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self._scattering_bins = scatter_bounds |
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self._binned_scattering_angles = np.digitize(self._scattering_angles, scatter_bounds) |
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else: |
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self._scattering_bins = None |
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self._binned_scattering_angles = None |
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@property |
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def pha(self): |
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return self._binned_pha |
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@property |
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def time(self): |
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return self._time |
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@property |
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def dead_time_fraction(self): |
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return self._dead_time_fraction |
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@property |
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def rsp(self): |
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return self._rsp |
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@property |
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def n_channels(self): |
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return len(self._rsp.ebounds) - 1 |
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@property |
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def scattering_angles(self): |
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return self._binned_scattering_angles |
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@property |
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def scattering_angle_time(self): |
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return self._scattering_angle_time |
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@property |
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def scattering_angle_dead_time_fraction(self): |
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return self._scattering_angle_dead_time_fraction |
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@property |
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def n_scattering_bins(self): |
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return len(self._scattering_bins) - 1 |
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@property |
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def scattering_edges(self): |
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return self._scattering_bins |
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grburgess /
polarpy
