def make_strain_from_inj_object(self,
inj,
delta_t,
detector_name,
f_lower=None,
distance_scale=1):
"""Make a h(t) strain time-series from an injection object as read from
a sim_inspiral table, for example.
Parameters
-----------
inj : injection object
The injection object to turn into a strain h(t).
delta_t : float
Sample rate to make injection at.
detector_name : string
Name of the detector used for projecting injections.
f_lower : {None, float}, optional
Low-frequency cutoff for injected signals. If None, use value
provided by each injection.
distance_scale: {1, float}, optional
Factor to scale the distance of an injection with. The default is
no scaling.
Returns
--------
signal : float
h(t) corresponding to the injection.
"""
detector = Detector(detector_name)
if f_lower is None:
f_l = inj.f_lower
else:
f_l = f_lower
name, phase_order = legacy_approximant_name(inj.waveform)
# compute the waveform time series
hp, hc = get_td_waveform(inj,
approximant=name,
delta_t=delta_t,
phase_order=phase_order,
f_lower=f_l,
distance=inj.distance,
**self.extra_args)
hp /= distance_scale
hc /= distance_scale
hp._epoch += inj.get_time_geocent()
hc._epoch += inj.get_time_geocent()
# taper the polarizations
hp_tapered = wfutils.taper_timeseries(hp, inj.taper)
hc_tapered = wfutils.taper_timeseries(hc, inj.taper)
# compute the detector response and add it to the strain
signal = detector.project_wave(hp_tapered, hc_tapered, inj.longitude,
inj.latitude, inj.polarization)
return signal
def make_strain_from_inj_object(self, inj, delta_t, detector_name, f_lower=None, distance_scale=1):
"""Make a h(t) strain time-series from an injection object as read from
a sim_inspiral table, for example.
Parameters
-----------
inj : injection object
The injection object to turn into a strain h(t).
delta_t : float
Sample rate to make injection at.
detector_name : string
Name of the detector used for projecting injections.
f_lower : {None, float}, optional
Low-frequency cutoff for injected signals. If None, use value
provided by each injection.
distance_scale: {1, float}, optional
Factor to scale the distance of an injection with. The default is
no scaling.
Returns
--------
signal : float
h(t) corresponding to the injection.
"""
detector = Detector(detector_name)
if f_lower is None:
f_l = inj.f_lower
else:
f_l = f_lower
name, phase_order = legacy_approximant_name(inj.waveform)
# compute the waveform time series
hp, hc = get_td_waveform(
inj,
approximant=name,
delta_t=delta_t,
phase_order=phase_order,
f_lower=f_l,
distance=inj.distance,
**self.extra_args
)
hp /= distance_scale
hc /= distance_scale
hp._epoch += inj.get_time_geocent()
hc._epoch += inj.get_time_geocent()
# taper the polarizations
hp_tapered = wfutils.taper_timeseries(hp, inj.taper)
hc_tapered = wfutils.taper_timeseries(hc, inj.taper)
# compute the detector response and add it to the strain
signal = detector.project_wave(hp_tapered, hc_tapered, inj.longitude, inj.latitude, inj.polarization)
return signal
def _postgenerate(self, res):
"""Applies a taper if it is in current params.
"""
hp, hc = res
try:
hp = taper_timeseries(hp, tapermethod=self.current_params['taper'])
hc = taper_timeseries(hc, tapermethod=self.current_params['taper'])
except KeyError:
pass
return hp, hc
def _postgenerate(self, res):
"""Applies a taper if it is in current params.
"""
hp, hc = res
try:
hp = taper_timeseries(hp, tapermethod=self.current_params['taper'])
hc = taper_timeseries(hc, tapermethod=self.current_params['taper'])
except KeyError:
pass
return hp, hc
def make_strain_from_inj_object(self, inj, delta_t, detector_name,
f_lower=None, distance_scale=1):
"""Make a h(t) strain time-series from an injection object.
Parameters
-----------
inj : injection object
The injection object to turn into a strain h(t). Can be any
object which has waveform parameters as attributes, such as an
element in a ``WaveformArray``.
delta_t : float
Sample rate to make injection at.
detector_name : string
Name of the detector used for projecting injections.
f_lower : {None, float}, optional
Low-frequency cutoff for injected signals. If None, use value
provided by each injection.
distance_scale: {1, float}, optional
Factor to scale the distance of an injection with. The default is
no scaling.
Returns
--------
signal : float
h(t) corresponding to the injection.
"""
detector = Detector(detector_name)
if f_lower is None:
f_l = inj.f_lower
else:
f_l = f_lower
# compute the waveform time series
hp, hc = get_td_waveform(inj, delta_t=delta_t, f_lower=f_l,
**self.extra_args)
hp /= distance_scale
hc /= distance_scale
hp._epoch += inj.tc
hc._epoch += inj.tc
# taper the polarizations
try:
hp_tapered = wfutils.taper_timeseries(hp, inj.taper)
hc_tapered = wfutils.taper_timeseries(hc, inj.taper)
except AttributeError:
hp_tapered = hp
hc_tapered = hc
# compute the detector response and add it to the strain
signal = detector.project_wave(hp_tapered, hc_tapered,
inj.ra, inj.dec, inj.polarization)
return signal
def make_strain_from_inj_object(self, inj, delta_t, detector_name,
f_lower=None, distance_scale=1):
"""Make a h(t) strain time-series from an injection object.
Parameters
-----------
inj : injection object
The injection object to turn into a strain h(t). Can be any
object which has waveform parameters as attributes, such as an
element in a ``WaveformArray``.
delta_t : float
Sample rate to make injection at.
detector_name : string
Name of the detector used for projecting injections.
f_lower : {None, float}, optional
Low-frequency cutoff for injected signals. If None, use value
provided by each injection.
distance_scale: {1, float}, optional
Factor to scale the distance of an injection with. The default is
no scaling.
Returns
--------
signal : float
h(t) corresponding to the injection.
"""
detector = Detector(detector_name)
if f_lower is None:
f_l = inj.f_lower
else:
f_l = f_lower
# compute the waveform time series
hp, hc = get_td_waveform(inj, delta_t=delta_t, f_lower=f_l,
**self.extra_args)
hp /= distance_scale
hc /= distance_scale
hp._epoch += inj.tc
hc._epoch += inj.tc
# taper the polarizations
try:
hp_tapered = wfutils.taper_timeseries(hp, inj.taper)
hc_tapered = wfutils.taper_timeseries(hc, inj.taper)
except AttributeError:
hp_tapered = hp
hc_tapered = hc
# compute the detector response and add it to the strain
signal = detector.project_wave(hp_tapered, hc_tapered,
inj.ra, inj.dec, inj.polarization)
return signal
def _postgenerate(self, res):
"""Applies a taper if it is in current params.
"""
if 'taper' in self.current_params:
tapermethod = self.current_params['taper']
for mode in res:
ulm, vlm = res[mode]
ulm = taper_timeseries(ulm, tapermethod=tapermethod)
vlm = taper_timeseries(vlm, tapermethod=tapermethod)
res[mode] = (ulm, vlm)
return res
def get_wf_pols(file, mtotal, inclination=0.0, delta_t=1./1024, f_lower=30,
distance=100):
"""
Generate the NR_hdf5_pycbc waveform from the HDF5 file <file> with specified
params
"""
f = h5py.File(file, 'r')
# Metadata parameters:
params = {}
params['mtotal'] = mtotal
params['eta'] = f.attrs['eta']
params['mass1'] = pnutils.mtotal_eta_to_mass1_mass2(params['mtotal'], params['eta'])[0]
params['mass2'] = pnutils.mtotal_eta_to_mass1_mass2(params['mtotal'], params['eta'])[1]
params['spin1x'] = f.attrs['spin1x']
params['spin1y'] = f.attrs['spin1y']
params['spin1z'] = f.attrs['spin1z']
params['spin2x'] = f.attrs['spin2x']
params['spin2y'] = f.attrs['spin2y']
params['spin2z'] = f.attrs['spin2z']
params['coa_phase'] = f.attrs['coa_phase']
f.close()
hp, hc = get_td_waveform(approximant='NR_hdf5_pycbc',
numrel_data=file,
mass1=params['mass1'],
mass2=params['mass2'],
spin1x=params['spin1x'],
spin1y=params['spin1y'],
spin1z=params['spin1z'],
spin2x=params['spin2x'],
spin2y=params['spin2y'],
spin2z=params['spin2z'],
delta_t=delta_t,
f_lower=f_lower,
inclination=inclination,
coa_phase=params['coa_phase'],
distance=distance)
hp_tapered = wfutils.taper_timeseries(hp, 'TAPER_START')
hc_tapered = wfutils.taper_timeseries(hc, 'TAPER_START')
return hp_tapered, hc_tapered
def projector(detector_name, inj, hp, hc, distance_scale=1):
""" Use the injection row to project the polarizations into the
detector frame
"""
detector = Detector(detector_name)
hp /= distance_scale
hc /= distance_scale
try:
tc = inj.tc
ra = inj.ra
dec = inj.dec
except:
tc = inj.get_time_geocent()
ra = inj.longitude
dec = inj.latitude
hp.start_time += tc
hc.start_time += tc
# taper the polarizations
try:
hp_tapered = wfutils.taper_timeseries(hp, inj.taper)
hc_tapered = wfutils.taper_timeseries(hc, inj.taper)
except AttributeError:
hp_tapered = hp
hc_tapered = hc
projection_method = 'lal'
if hasattr(inj, 'detector_projection_method'):
projection_method = inj.detector_projection_method
logging.info('Injecting at %s, method is %s', tc, projection_method)
# compute the detector response and add it to the strain
signal = detector.project_wave(
hp_tapered,
hc_tapered,
ra,
dec,
inj.polarization,
method=projection_method,
reference_time=tc,
)
return signal
def get_waveform_filter(out, template=None, **kwargs):
"""Return a frequency domain waveform filter for the specified approximant
"""
n = len(out)
input_params = props(template, **kwargs)
if input_params['approximant'] in filter_approximants(_scheme.mgr.state):
wav_gen = filter_wav[type(_scheme.mgr.state)]
htilde = wav_gen[input_params['approximant']](out=out, **input_params)
htilde.resize(n)
htilde.chirp_length = get_waveform_filter_length_in_time(
**input_params)
htilde.length_in_time = htilde.chirp_length
return htilde
if input_params['approximant'] in fd_approximants(_scheme.mgr.state):
wav_gen = fd_wav[type(_scheme.mgr.state)]
hp, hc = wav_gen[input_params['approximant']](**input_params)
hp.resize(n)
out[0:len(hp)] = hp[:]
hp = FrequencySeries(out, delta_f=hp.delta_f, copy=False)
hp.chirp_length = get_waveform_filter_length_in_time(**input_params)
hp.length_in_time = hp.chirp_length
return hp
elif input_params['approximant'] in td_approximants(_scheme.mgr.state):
# N: number of time samples required
N = (n - 1) * 2
delta_f = 1.0 / (N * input_params['delta_t'])
wav_gen = td_wav[type(_scheme.mgr.state)]
hp, hc = wav_gen[input_params['approximant']](**input_params)
# taper the time series hp if required
if ('taper' in input_params.keys() and \
input_params['taper'] is not None):
hp = wfutils.taper_timeseries(hp,
input_params['taper'],
return_lal=False)
# total duration of the waveform
tmplt_length = len(hp) * hp.delta_t
# for IMR templates the zero of time is at max amplitude (merger)
# thus the start time is minus the duration of the template from
# lower frequency cutoff to merger, i.e. minus the 'chirp time'
tChirp = -float(hp.start_time) # conversion from LIGOTimeGPS
hp.resize(N)
k_zero = int(hp.start_time / hp.delta_t)
hp.roll(k_zero)
htilde = FrequencySeries(out, delta_f=delta_f, copy=False)
fft(hp.astype(real_same_precision_as(htilde)), htilde)
htilde.length_in_time = tmplt_length
htilde.chirp_length = tChirp
return htilde
else:
raise ValueError("Approximant %s not available" %
(input_params['approximant']))
def get_waveform_filter(out, template=None, **kwargs):
"""Return a frequency domain waveform filter for the specified approximant
"""
n = len(out)
input_params = props(template, **kwargs)
if input_params['approximant'] in filter_approximants(_scheme.mgr.state):
wav_gen = filter_wav[type(_scheme.mgr.state)]
htilde = wav_gen[input_params['approximant']](out=out, **input_params)
htilde.resize(n)
htilde.chirp_length = get_waveform_filter_length_in_time(**input_params)
htilde.length_in_time = htilde.chirp_length
return htilde
if input_params['approximant'] in fd_approximants(_scheme.mgr.state):
wav_gen = fd_wav[type(_scheme.mgr.state)]
hp, hc = wav_gen[input_params['approximant']](**input_params)
hp.resize(n)
out[0:len(hp)] = hp[:]
hp = FrequencySeries(out, delta_f=hp.delta_f, copy=False)
hp.chirp_length = get_waveform_filter_length_in_time(**input_params)
hp.length_in_time = hp.chirp_length
return hp
elif input_params['approximant'] in td_approximants(_scheme.mgr.state):
# N: number of time samples required
N = (n-1)*2
delta_f = 1.0 / (N * input_params['delta_t'])
wav_gen = td_wav[type(_scheme.mgr.state)]
hp, hc = wav_gen[input_params['approximant']](**input_params)
# taper the time series hp if required
if ('taper' in input_params.keys() and \
input_params['taper'] is not None):
hp = wfutils.taper_timeseries(hp, input_params['taper'],
return_lal=False)
# total duration of the waveform
tmplt_length = len(hp) * hp.delta_t
# for IMR templates the zero of time is at max amplitude (merger)
# thus the start time is minus the duration of the template from
# lower frequency cutoff to merger, i.e. minus the 'chirp time'
tChirp = - float( hp.start_time ) # conversion from LIGOTimeGPS
hp.resize(N)
k_zero = int(hp.start_time / hp.delta_t)
hp.roll(k_zero)
htilde = FrequencySeries(out, delta_f=delta_f, copy=False)
fft(hp.astype(real_same_precision_as(htilde)), htilde)
htilde.length_in_time = tmplt_length
htilde.chirp_length = tChirp
return htilde
else:
raise ValueError("Approximant %s not available" %
(input_params['approximant']))
def get_waveform_filter(out, template=None, **kwargs):
"""Return a frequency domain waveform filter for the specified approximant
"""
n = len(out)
input_params = props(template, **kwargs)
if input_params['approximant'] in filter_approximants(_scheme.mgr.state):
wav_gen = filter_wav[type(_scheme.mgr.state)]
htilde = wav_gen[input_params['approximant']](out=out, **input_params)
htilde.resize(n)
htilde.chirp_length = get_waveform_filter_length_in_time(
**input_params)
htilde.length_in_time = htilde.chirp_length
return htilde
if input_params['approximant'] in fd_approximants(_scheme.mgr.state):
wav_gen = fd_wav[type(_scheme.mgr.state)]
duration = get_waveform_filter_length_in_time(**input_params)
hp, hc = wav_gen[input_params['approximant']](duration=duration,
return_hc=False,
**input_params)
hp.resize(n)
out[0:len(hp)] = hp[:]
hp = FrequencySeries(out, delta_f=hp.delta_f, copy=False)
hp.length_in_time = hp.chirp_length = duration
return hp
elif input_params['approximant'] in td_approximants(_scheme.mgr.state):
# N: number of time samples required
N = (n - 1) * 2
delta_f = 1.0 / (N * input_params['delta_t'])
wav_gen = td_wav[type(_scheme.mgr.state)]
hp, hc = wav_gen[input_params['approximant']](**input_params)
# taper the time series hp if required
if ('taper' in input_params.keys() and \
input_params['taper'] is not None):
hp = wfutils.taper_timeseries(hp,
input_params['taper'],
return_lal=False)
return td_waveform_to_fd_waveform(hp, out=out)
else:
raise ValueError("Approximant %s not available" %
(input_params['approximant']))
def get_waveform_filter(out, template=None, **kwargs):
"""Return a frequency domain waveform filter for the specified approximant
"""
n = len(out)
input_params = props(template, **kwargs)
if input_params['approximant'] in filter_approximants(_scheme.mgr.state):
wav_gen = filter_wav[type(_scheme.mgr.state)]
htilde = wav_gen[input_params['approximant']](out=out, **input_params)
htilde.resize(n)
htilde.chirp_length = get_waveform_filter_length_in_time(**input_params)
htilde.length_in_time = htilde.chirp_length
return htilde
if input_params['approximant'] in fd_approximants(_scheme.mgr.state):
wav_gen = fd_wav[type(_scheme.mgr.state)]
duration = get_waveform_filter_length_in_time(**input_params)
hp, hc = wav_gen[input_params['approximant']](duration=duration,
return_hc=False, **input_params)
hp.resize(n)
out[0:len(hp)] = hp[:]
hp = FrequencySeries(out, delta_f=hp.delta_f, copy=False)
hp.length_in_time = hp.chirp_length = duration
return hp
elif input_params['approximant'] in td_approximants(_scheme.mgr.state):
# N: number of time samples required
N = (n-1)*2
delta_f = 1.0 / (N * input_params['delta_t'])
wav_gen = td_wav[type(_scheme.mgr.state)]
hp, hc = wav_gen[input_params['approximant']](**input_params)
# taper the time series hp if required
if ('taper' in input_params.keys() and \
input_params['taper'] is not None):
hp = wfutils.taper_timeseries(hp, input_params['taper'],
return_lal=False)
return td_waveform_to_fd_waveform(hp, out=out)
else:
raise ValueError("Approximant %s not available" %
(input_params['approximant']))
def make_strain_from_inj_object(self, inj, delta_t, detector_name,
f_lower=None, distance_scale=1):
"""Make a h(t) strain time-series from an injection object as read from
a sim_inspiral table, for example.
Parameters
-----------
inj : injection object
The injection object to turn into a strain h(t).
delta_t : float
Sample rate to make injection at.
detector_name : string
Name of the detector used for projecting injections.
f_lower : {None, float}, optional
Low-frequency cutoff for injected signals. If None, use value
provided by each injection.
distance_scale: {1, float}, optional
Factor to scale the distance of an injection with. The default is
no scaling.
Returns
--------
signal : float
h(t) corresponding to the injection.
"""
detector = Detector(detector_name)
if f_lower is None:
f_l = inj.f_lower
else:
f_l = f_lower
# FIXME: Old NR interface will soon be removed. Do not use!
if inj.numrel_data != None and inj.numrel_data != "":
# performing NR waveform injection
# reading Hp and Hc from the frame files
swigrow = self.getswigrow(inj)
import lalinspiral
Hp, Hc = lalinspiral.NRInjectionFromSimInspiral(swigrow, delta_t)
# converting to pycbc timeseries
hp = TimeSeries(Hp.data.data[:], delta_t=Hp.deltaT,
epoch=Hp.epoch)
hc = TimeSeries(Hc.data.data[:], delta_t=Hc.deltaT,
epoch=Hc.epoch)
hp /= distance_scale
hc /= distance_scale
else:
name, phase_order = legacy_approximant_name(inj.waveform)
# compute the waveform time series
hp, hc = get_td_waveform(
inj, approximant=name, delta_t=delta_t,
phase_order=phase_order,
f_lower=f_l, distance=inj.distance,
**self.extra_args)
hp /= distance_scale
hc /= distance_scale
hp._epoch += inj.get_time_geocent()
hc._epoch += inj.get_time_geocent()
# taper the polarizations
hp_tapered = wfutils.taper_timeseries(hp, inj.taper)
hc_tapered = wfutils.taper_timeseries(hc, inj.taper)
# compute the detector response and add it to the strain
signal = detector.project_wave(hp_tapered, hc_tapered,
inj.longitude, inj.latitude, inj.polarization)
return signal
def get_two_pol_waveform_filter(outplus, outcross, template, **kwargs):
"""Return a frequency domain waveform filter for the specified approximant.
Unlike get_waveform_filter this function returns both h_plus and h_cross
components of the waveform, which are needed for searches where h_plus
and h_cross are not related by a simple phase shift.
"""
n = len(outplus)
# If we don't have an inclination column alpha3 might be used
if not hasattr(template, 'inclination') and 'inclination' not in kwargs:
if hasattr(template, 'alpha3'):
kwargs['inclination'] = template.alpha3
input_params = props(template, **kwargs)
if input_params['approximant'] in fd_approximants(_scheme.mgr.state):
wav_gen = fd_wav[type(_scheme.mgr.state)]
hp, hc = wav_gen[input_params['approximant']](**input_params)
hp.resize(n)
hc.resize(n)
outplus[0:len(hp)] = hp[:]
hp = FrequencySeries(outplus, delta_f=hp.delta_f, copy=False)
outcross[0:len(hc)] = hc[:]
hc = FrequencySeries(outcross, delta_f=hc.delta_f, copy=False)
hp.chirp_length = get_waveform_filter_length_in_time(**input_params)
hp.length_in_time = hp.chirp_length
hc.chirp_length = hp.chirp_length
hc.length_in_time = hp.length_in_time
return hp, hc
elif input_params['approximant'] in td_approximants(_scheme.mgr.state):
# N: number of time samples required
N = (n-1)*2
delta_f = 1.0 / (N * input_params['delta_t'])
wav_gen = td_wav[type(_scheme.mgr.state)]
hp, hc = wav_gen[input_params['approximant']](**input_params)
# taper the time series hp if required
if 'taper' in input_params.keys() and \
input_params['taper'] is not None:
hp = wfutils.taper_timeseries(hp, input_params['taper'],
return_lal=False)
hc = wfutils.taper_timeseries(hc, input_params['taper'],
return_lal=False)
# total duration of the waveform
tmplt_length = len(hp) * hp.delta_t
# for IMR templates the zero of time is at max amplitude (merger)
# thus the start time is minus the duration of the template from
# lower frequency cutoff to merger, i.e. minus the 'chirp time'
tChirp = - float( hp.start_time ) # conversion from LIGOTimeGPS
hp.resize(N)
hc.resize(N)
k_zero = int(hp.start_time / hp.delta_t)
hp.roll(k_zero)
hc.roll(k_zero)
hp_tilde = FrequencySeries(outplus, delta_f=delta_f, copy=False)
hc_tilde = FrequencySeries(outcross, delta_f=delta_f, copy=False)
fft(hp.astype(real_same_precision_as(hp_tilde)), hp_tilde)
fft(hc.astype(real_same_precision_as(hc_tilde)), hc_tilde)
hp_tilde.length_in_time = tmplt_length
hp_tilde.chirp_length = tChirp
hc_tilde.length_in_time = tmplt_length
hc_tilde.chirp_length = tChirp
return hp_tilde, hc_tilde
else:
raise ValueError("Approximant %s not available" %
(input_params['approximant']))
# APPROXIMANT
hplus_approx, hcross_approx = get_td_waveform(approximant=approx,
distance=distance,
mass1=mass1,
mass2=mass2,
spin1x=0.0,
spin2x=0.0,
spin1y=0.0,
spin2y=0.0,
spin1z=simulations.simulations[sim_number]['spin1z'],
spin2z=simulations.simulations[sim_number]['spin2z'],
inclination=inc,
f_lower=f_low_approx,
delta_t=delta_t)
hplus_approx = wfutils.taper_timeseries(hplus_approx, 'TAPER_START')
hcross_approx = wfutils.taper_timeseries(hcross_approx, 'TAPER_START')
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# MATCH CALCULATION
# Make the timeseries consistent lengths
tlen = max([len(hplus_approx), len(hplus_NR), int(datalen/delta_t)])
#tlen = int(datalen / delta_t)
hplus_approx.resize(tlen)
hplus_NR.resize(tlen)
hcross_approx.resize(tlen)
hcross_NR.resize(tlen)
def apply(self, strain, detector_name, f_lower=None, distance_scale=1,
simulation_ids=None):
"""Add injections (as seen by a particular detector) to a time series.
Parameters
----------
strain : TimeSeries
Time series to inject signals into, of type float32 or float64.
detector_name : string
Name of the detector used for projecting injections.
f_lower : {None, float}, optional
Low-frequency cutoff for injected signals. If None, use value
provided by each injection.
distance_scale: {1, float}, optional
Factor to scale the distance of an injection with. The default is
no scaling.
simulation_ids: iterable, optional
If given, only inject signals with the given simulation IDs.
Returns
-------
None
Raises
------
TypeError
For invalid types of `strain`.
"""
if not strain.dtype in (float32, float64):
raise TypeError("Strain dtype must be float32 or float64, not " \
+ str(strain.dtype))
lalstrain = strain.lal()
detector = Detector(detector_name)
earth_travel_time = lal.REARTH_SI / lal.C_SI
t0 = float(strain.start_time) - earth_travel_time
t1 = float(strain.end_time) + earth_travel_time
# pick lalsimulation injection function
add_injection = injection_func_map[strain.dtype]
injections = self.table
if simulation_ids:
injections = [inj for inj in injections \
if inj.simulation_id in simulation_ids]
for inj in injections:
if f_lower is None:
f_l = inj.f_lower
else:
f_l = f_lower
if inj.numrel_data != None and inj.numrel_data != "":
# performing NR waveform injection
# reading Hp and Hc from the frame files
swigrow = self.getswigrow(inj)
import lalinspiral
Hp, Hc = lalinspiral.NRInjectionFromSimInspiral(swigrow,
strain.delta_t)
# converting to pycbc timeseries
hp = TimeSeries(Hp.data.data[:], delta_t=Hp.deltaT,
epoch=Hp.epoch)
hc = TimeSeries(Hc.data.data[:], delta_t=Hc.deltaT,
epoch=Hc.epoch)
hp /= distance_scale
hc /= distance_scale
end_time = float(hp.get_end_time())
start_time = float(hp.get_start_time())
if end_time < t0 or start_time > t1:
continue
else:
# roughly estimate if the injection may overlap with the segment
end_time = inj.get_time_geocent()
inj_length = sim.SimInspiralTaylorLength(
strain.delta_t, inj.mass1 * lal.MSUN_SI,
inj.mass2 * lal.MSUN_SI, f_l, 0)
start_time = end_time - 2 * inj_length
if end_time < t0 or start_time > t1:
continue
name, phase_order = legacy_approximant_name(inj.waveform)
# compute the waveform time series
hp, hc = get_td_waveform(
inj, approximant=name, delta_t=strain.delta_t,
phase_order=phase_order,
f_lower=f_l, distance=inj.distance * distance_scale,
**self.extra_args)
hp._epoch += float(end_time)
hc._epoch += float(end_time)
if float(hp.start_time) > t1:
continue
# compute the detector response, taper it if requested
# and add it to the strain
signal = detector.project_wave(
hp, hc, inj.longitude, inj.latitude, inj.polarization)
# the taper_timeseries function converts to a LAL TimeSeries
signal = signal.astype(strain.dtype)
signal_lal = wfutils.taper_timeseries(signal, inj.taper, return_lal=True)
add_injection(lalstrain, signal_lal, None)
strain.data[:] = lalstrain.data.data[:]
# hcross_NR.data = window_wave(hcross_NR.data)
dAmpbyAmp = scale_NR(times_codeunits, dAmpbyAmp_codeunits, mass, delta_t=delta_t)
dphi = scale_NR(times_codeunits, dphi_codeunits, mass, delta_t=delta_t)
NR_freqs = wfutils.frequency_from_polarizations(hplus_NR, hcross_NR)
# zero-out everything after ffinal
# crossing_point = \
# NR_freqs.sample_times[
# np.isclose(NR_freqs,ffinal,1/hplus_NR.sample_times[-1])[0]
# ]
# hplus_NR.data[int(hplus_NR.sample_times>crossing_point)] = 0.0
# hcross_NR.data[int(hcross_NR.sample_times>crossing_point)] = 0.0
#
hplus_NR = wfutils.taper_timeseries(hplus_NR, "TAPER_STARTEND")
hcross_NR = wfutils.taper_timeseries(hcross_NR, "TAPER_STARTEND")
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# APPROXIMANT
# if approx == 'SEOBNRv2':
if approx in td_approximants():
hplus_approx, hcross_approx = get_td_waveform(
approximant=approx,
distance=distance,
mass1=mass1,
mass2=mass2,
spin1x=0.0,
spin2x=0.0,
def make_strain_from_inj_object(self,
inj,
delta_t,
detector_name,
f_lower=None,
distance_scale=1):
"""Make a h(t) strain time-series from an injection object as read from
a sim_inspiral table, for example.
Parameters
-----------
inj : injection object
The injection object to turn into a strain h(t).
delta_t : float
Sample rate to make injection at.
detector_name : string
Name of the detector used for projecting injections.
f_lower : {None, float}, optional
Low-frequency cutoff for injected signals. If None, use value
provided by each injection.
distance_scale: {1, float}, optional
Factor to scale the distance of an injection with. The default is
no scaling.
Returns
--------
signal : float
h(t) corresponding to the injection.
"""
detector = Detector(detector_name)
if f_lower is None:
f_l = inj.f_lower
else:
f_l = f_lower
# FIXME: Old NR interface will soon be removed. Do not use!
if inj.numrel_data != None and inj.numrel_data != "":
# performing NR waveform injection
# reading Hp and Hc from the frame files
swigrow = self.getswigrow(inj)
import lalinspiral
Hp, Hc = lalinspiral.NRInjectionFromSimInspiral(swigrow, delta_t)
# converting to pycbc timeseries
hp = TimeSeries(Hp.data.data[:], delta_t=Hp.deltaT, epoch=Hp.epoch)
hc = TimeSeries(Hc.data.data[:], delta_t=Hc.deltaT, epoch=Hc.epoch)
hp /= distance_scale
hc /= distance_scale
else:
name, phase_order = legacy_approximant_name(inj.waveform)
# compute the waveform time series
hp, hc = get_td_waveform(inj,
approximant=name,
delta_t=delta_t,
phase_order=phase_order,
f_lower=f_l,
distance=inj.distance,
**self.extra_args)
hp /= distance_scale
hc /= distance_scale
hp._epoch += inj.get_time_geocent()
hc._epoch += inj.get_time_geocent()
# taper the polarizations
hp_tapered = wfutils.taper_timeseries(hp, inj.taper)
hc_tapered = wfutils.taper_timeseries(hc, inj.taper)
# compute the detector response and add it to the strain
signal = detector.project_wave(hp_tapered, hc_tapered, inj.longitude,
inj.latitude, inj.polarization)
return signal
def get_two_pol_waveform_filter(outplus, outcross, template, **kwargs):
"""Return a frequency domain waveform filter for the specified approximant.
Unlike get_waveform_filter this function returns both h_plus and h_cross
components of the waveform, which are needed for searches where h_plus
and h_cross are not related by a simple phase shift.
"""
n = len(outplus)
# If we don't have an inclination column alpha3 might be used
if not hasattr(template, 'inclination') and 'inclination' not in kwargs:
if hasattr(template, 'alpha3'):
kwargs['inclination'] = template.alpha3
input_params = props(template, **kwargs)
if input_params['approximant'] in fd_approximants(_scheme.mgr.state):
wav_gen = fd_wav[type(_scheme.mgr.state)]
hp, hc = wav_gen[input_params['approximant']](**input_params)
hp.resize(n)
hc.resize(n)
outplus[0:len(hp)] = hp[:]
hp = FrequencySeries(outplus, delta_f=hp.delta_f, copy=False)
outcross[0:len(hc)] = hc[:]
hc = FrequencySeries(outcross, delta_f=hc.delta_f, copy=False)
hp.chirp_length = get_waveform_filter_length_in_time(**input_params)
hp.length_in_time = hp.chirp_length
hc.chirp_length = hp.chirp_length
hc.length_in_time = hp.length_in_time
return hp, hc
elif input_params['approximant'] in td_approximants(_scheme.mgr.state):
# N: number of time samples required
N = (n-1)*2
delta_f = 1.0 / (N * input_params['delta_t'])
wav_gen = td_wav[type(_scheme.mgr.state)]
hp, hc = wav_gen[input_params['approximant']](**input_params)
# taper the time series hp if required
if 'taper' in input_params.keys() and \
input_params['taper'] is not None:
hp = wfutils.taper_timeseries(hp, input_params['taper'],
return_lal=False)
hc = wfutils.taper_timeseries(hc, input_params['taper'],
return_lal=False)
# total duration of the waveform
tmplt_length = len(hp) * hp.delta_t
# for IMR templates the zero of time is at max amplitude (merger)
# thus the start time is minus the duration of the template from
# lower frequency cutoff to merger, i.e. minus the 'chirp time'
tChirp = - float( hp.start_time ) # conversion from LIGOTimeGPS
hp.resize(N)
hc.resize(N)
k_zero = int(hp.start_time / hp.delta_t)
hp.roll(k_zero)
hc.roll(k_zero)
hp_tilde = FrequencySeries(outplus, delta_f=delta_f, copy=False)
hc_tilde = FrequencySeries(outcross, delta_f=delta_f, copy=False)
fft(hp.astype(real_same_precision_as(hp_tilde)), hp_tilde)
fft(hc.astype(real_same_precision_as(hc_tilde)), hc_tilde)
hp_tilde.length_in_time = tmplt_length
hp_tilde.chirp_length = tChirp
hc_tilde.length_in_time = tmplt_length
hc_tilde.chirp_length = tChirp
return hp_tilde, hc_tilde
else:
raise ValueError("Approximant %s not available" %
(input_params['approximant']))
def apply(self, strain, detector_name, f_lower=None, distance_scale=1,
simulation_ids=None):
"""Add injections (as seen by a particular detector) to a time series.
Parameters
----------
strain : TimeSeries
Time series to inject signals into, of type float32 or float64.
detector_name : string
Name of the detector used for projecting injections.
f_lower : {None, float}, optional
Low-frequency cutoff for injected signals. If None, use value
provided by each injection.
distance_scale: {1, float}, optional
Factor to scale the distance of an injection with. The default is
no scaling.
simulation_ids: iterable, optional
If given, only inject signals with the given simulation IDs.
Returns
-------
None
Raises
------
TypeError
For invalid types of `strain`.
"""
if not strain.dtype in (float32, float64):
raise TypeError("Strain dtype must be float32 or float64, not " \
+ str(strain.dtype))
lalstrain = strain.lal()
detector = Detector(detector_name)
earth_travel_time = lal.REARTH_SI / lal.C_SI
t0 = float(strain.start_time) - earth_travel_time
t1 = float(strain.end_time) + earth_travel_time
# pick lalsimulation injection function
add_injection = injection_func_map[strain.dtype]
injections = self.table
if simulation_ids:
injections = [inj for inj in injections \
if inj.simulation_id in simulation_ids]
for inj in injections:
if f_lower is None:
f_l = inj.f_lower
else:
f_l = f_lower
if inj.numrel_data != None and inj.numrel_data != "":
# performing NR waveform injection
# reading Hp and Hc from the frame files
swigrow = self.getswigrow(inj)
import lalinspiral
Hp, Hc = lalinspiral.NRInjectionFromSimInspiral(swigrow,
strain.delta_t)
# converting to pycbc timeseries
hp = TimeSeries(Hp.data.data[:], delta_t=Hp.deltaT,
epoch=Hp.epoch)
hc = TimeSeries(Hc.data.data[:], delta_t=Hc.deltaT,
epoch=Hc.epoch)
hp /= distance_scale
hc /= distance_scale
end_time = float(hp.get_end_time())
start_time = float(hp.get_start_time())
if end_time < t0 or start_time > t1:
continue
else:
# roughly estimate if the injection may overlap with the segment
end_time = inj.get_time_geocent()
inj_length = sim.SimInspiralTaylorLength(
strain.delta_t, inj.mass1 * lal.MSUN_SI,
inj.mass2 * lal.MSUN_SI, f_l, 0)
start_time = end_time - 2 * inj_length
if end_time < t0 or start_time > t1:
continue
name, phase_order = legacy_approximant_name(inj.waveform)
# compute the waveform time series
hp, hc = get_td_waveform(
inj, approximant=name, delta_t=strain.delta_t,
phase_order=phase_order,
f_lower=f_l, distance=inj.distance * distance_scale,
**self.extra_args)
hp._epoch += float(end_time)
hc._epoch += float(end_time)
if float(hp.start_time) > t1:
continue
# taper the polarizations
hp_tapered = wfutils.taper_timeseries(hp, inj.taper)
hc_tapered = wfutils.taper_timeseries(hc, inj.taper)
# compute the detector response and add it to the strain
signal = detector.project_wave(hp_tapered, hc_tapered,
inj.longitude, inj.latitude, inj.polarization)
signal = signal.astype(strain.dtype)
signal_lal = signal.lal()
add_injection(lalstrain, signal_lal, None)
strain.data[:] = lalstrain.data.data[:]
mass1=params['mass1'],
mass2=params['mass2'],
spin1x=params['spin1x'],
spin1y=params['spin1y'],
spin1z=params['spin1z'],
spin2x=params['spin2x'],
spin2y=params['spin2y'],
spin2z=params['spin2z'],
delta_t=deltaT,
f_lower=f_lower,
inclination=float(sys.argv[2]),
coa_phase=params['coa_phase'],
distance=100)
hp_tapered = wfutils.taper_timeseries(hp, 'TAPER_START')
hc_tapered = wfutils.taper_timeseries(hc, 'TAPER_START')
hp_tapered.data[:] /= pycbc.filter.sigma(hp_tapered)
hc_tapered.data[:] /= pycbc.filter.sigma(hc_tapered)
now = timeit.time.time()
print "took %f sec to extract pols"%(now-then)
# Generate the signal in the detector
detector = Detector(detector_name)
#longitude=float(sys.argv[1])
#latitude=float(sys.argv[2])
polarization=float(sys.argv[3])
def apply(self, strain, detector_name, f_lower=None, distance_scale=1):
"""Add injections (as seen by a particular detector) to a time series.
Parameters
----------
strain : TimeSeries
Time series to inject signals into, of type float32 or float64.
detector_name : string
Name of the detector used for projecting injections.
f_lower : {None, float}, optional
Low-frequency cutoff for injected signals. If None, use value
provided by each injection.
distance_scale: {1, foat}, optional
Factor to scale the distance of an injection with. The default is
no scaling.
Returns
-------
None
Raises
------
TypeError
For invalid types of `strain`.
"""
if strain.dtype not in (float32, float64):
raise TypeError("Strain dtype must be float32 or float64, not " \
+ str(strain.dtype))
lalstrain = strain.lal()
detector = Detector(detector_name)
earth_travel_time = lal.REARTH_SI / lal.C_SI
t0 = float(strain.start_time) - earth_travel_time
t1 = float(strain.end_time) + earth_travel_time
# pick lalsimulation injection function
add_injection = injection_func_map[strain.dtype]
for inj in self.table:
# roughly estimate if the injection may overlap with the segment
end_time = inj.get_time_geocent()
#CHECK: This is a hack (10.0s); replace with an accurate estimate
inj_length = 10.0
eccentricity = 0.0
polarization = 0.0
start_time = end_time - 2 * inj_length
if end_time < t0 or start_time > t1:
continue
# compute the waveform time series
hp, hc = sim.SimBurstSineGaussian(float(inj.q),
float(inj.frequency),
float(inj.hrss),
float(eccentricity),
float(polarization),
float(strain.delta_t))
hp = TimeSeries(hp.data.data[:], delta_t=hp.deltaT, epoch=hp.epoch)
hc = TimeSeries(hc.data.data[:], delta_t=hc.deltaT, epoch=hc.epoch)
hp._epoch += float(end_time)
hc._epoch += float(end_time)
if float(hp.start_time) > t1:
continue
# compute the detector response, taper it if requested
# and add it to the strain
strain = wfutils.taper_timeseries(strain, inj.taper)
signal_lal = hp.astype(strain.dtype).lal()
add_injection(lalstrain, signal_lal, None)
strain.data[:] = lalstrain.data.data[:]
def apply(self, strain, detector_name, f_lower=None, distance_scale=1):
"""Add injections (as seen by a particular detector) to a time series.
Parameters
----------
strain : TimeSeries
Time series to inject signals into, of type float32 or float64.
detector_name : string
Name of the detector used for projecting injections.
f_lower : {None, float}, optional
Low-frequency cutoff for injected signals. If None, use value
provided by each injection.
distance_scale: {1, foat}, optional
Factor to scale the distance of an injection with. The default is
no scaling.
Returns
-------
None
Raises
------
TypeError
For invalid types of `strain`.
"""
if strain.dtype not in (float32, float64):
raise TypeError("Strain dtype must be float32 or float64, not " \
+ str(strain.dtype))
lalstrain = strain.lal()
#detector = Detector(detector_name)
earth_travel_time = lal.REARTH_SI / lal.C_SI
t0 = float(strain.start_time) - earth_travel_time
t1 = float(strain.end_time) + earth_travel_time
# pick lalsimulation injection function
add_injection = injection_func_map[strain.dtype]
for inj in self.table:
# roughly estimate if the injection may overlap with the segment
end_time = inj.get_time_geocent()
#CHECK: This is a hack (10.0s); replace with an accurate estimate
inj_length = 10.0
eccentricity = 0.0
polarization = 0.0
start_time = end_time - 2 * inj_length
if end_time < t0 or start_time > t1:
continue
# compute the waveform time series
hp, hc = sim.SimBurstSineGaussian(float(inj.q),
float(inj.frequency),float(inj.hrss),float(eccentricity),
float(polarization),float(strain.delta_t))
hp = TimeSeries(hp.data.data[:], delta_t=hp.deltaT, epoch=hp.epoch)
hc = TimeSeries(hc.data.data[:], delta_t=hc.deltaT, epoch=hc.epoch)
hp._epoch += float(end_time)
hc._epoch += float(end_time)
if float(hp.start_time) > t1:
continue
# compute the detector response, taper it if requested
# and add it to the strain
strain = wfutils.taper_timeseries(strain, inj.taper)
signal_lal = hp.astype(strain.dtype).lal()
add_injection(lalstrain, signal_lal, None)
strain.data[:] = lalstrain.data.data[:]
