show_phases.py
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#! /usr/bin/env python
# ==========================================================================
# Display phase information from event list
#
# Copyright (C) 2017 Juergen Knoedlseder
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# ==========================================================================
import sys
import gammalib
import cscripts
try:
import matplotlib.pyplot as plt
plt.figure()
plt.close()
except (ImportError, RuntimeError):
print('This script needs the "matplotlib" module')
sys.exit()
# =========== #
# Plot phases #
# =========== #
def plot_phases(filename, plotfile, nphases=40):
"""
Plot phases
Parameters
----------
filename : str
Name of lightcurve FITS file
plotfile : str
Plot file name
"""
# Read observation container. If an exception occurs then try loading the
# file as an event list and build an observation container.
try:
obs = gammalib.GObservations(filename)
except:
obs = gammalib.GObservations()
obs.append(gammalib.GCTAObservation(filename))
# Initialise phases
phases = []
# Loop over all observations
for run in obs:
# Get events
events = run.events()
# Loop over all events
for event in events:
# Get phase
phase = event.phase()
# Collect phase
phases.append(phase)
phases.append(phase+1.0)
# Plot phase
plt.figure()
plt.hist(phases,bins=nphases,range=(0.0,2.0),facecolor='r')
plt.xlabel('Phase')
plt.ylabel('Events')
# Show figure
if len(plotfile) > 0:
plt.savefig(plotfile)
else:
plt.show()
# Return
return
# =========== #
# Show phases #
# =========== #
def show_phases():
"""
Show phases
"""
# Set usage string
usage = 'show_phases.py [-p plotfile] [file]'
# Set default options
options = [{'option': '-n', 'value': '20'},
{'option': '-p', 'value': ''}]
# Get arguments and options from command line arguments
args, options = cscripts.ioutils.get_args_options(options, usage)
# Extract script parameters from options
nphases = int(options[0]['value'])*2
plotfile = options[1]['value']
# Plot phases
plot_phases(args[0], plotfile, nphases=nphases)
# Return
return
# ======================== #
# Main routine entry point #
# ======================== #
if __name__ == '__main__':
# Show phases
show_phases()