def _det_tc(detector_name, ra, dec, tc, ref_frame='geocentric'):
"""Returns the coalescence time of a signal in the given detector.
Parameters
----------
detector_name : string
The name of the detector, e.g., 'H1'.
ra : float
The right ascension of the signal, in radians.
dec : float
The declination of the signal, in radians.
tc : float
The GPS time of the coalescence of the signal in the `ref_frame`.
ref_frame : {'geocentric', string}
The reference frame that the given coalescence time is defined in.
May specify 'geocentric', or a detector name; default is 'geocentric'.
Returns
-------
float :
The GPS time of the coalescence in detector `detector_name`.
"""
if ref_frame == detector_name:
return tc
detector = Detector(detector_name)
if ref_frame == 'geocentric':
return tc + detector.time_delay_from_center(ra, dec, tc)
else:
other = Detector(ref_frame)
return tc + detector.time_delay_from_detector(other, ra, dec, tc)
def _det_tc(detector_name, ra, dec, tc, ref_frame='geocentric'):
"""Returns the coalescence time of a signal in the given detector.
Parameters
----------
detector_name : string
The name of the detector, e.g., 'H1'.
ra : float
The right ascension of the signal, in radians.
dec : float
The declination of the signal, in radians.
tc : float
The GPS time of the coalescence of the signal in the `ref_frame`.
ref_frame : {'geocentric', string}
The reference frame that the given coalescence time is defined in.
May specify 'geocentric', or a detector name; default is 'geocentric'.
Returns
-------
float :
The GPS time of the coalescence in detector `detector_name`.
"""
if ref_frame == detector_name:
return tc
detector = Detector(detector_name)
if ref_frame == 'geocentric':
return tc + detector.time_delay_from_center(ra, dec, tc)
else:
other = Detector(ref_frame)
return tc + detector.time_delay_from_detector(other, ra, dec, tc)
