Detailed Description

This structure contains the required information for generating a ringdown template and storing ringdown triggers.

The fields are:

ifo: The interferometer in which the trigger is found.
channel: The interferometer channel in which the ringdown is found.
start_time: The GPS start time of the ringdown trigger.
frequency: The central frequency of the ringdown waveform (in Hz).
quality: The quality factor \(Q\) of the ringdown waveform.
phase: The initial phase of the ringdown in radians. Zero is a cosine-phase ringdown; \(-\pi/2\) is a sine-phase ringdown.
mass: The mass \(M\) of the black hole (in solar masses, \(M_\odot\)).
spin: The dimensionless spin parameter of the black hole \({\hat{a}}\) where the spin is \(S={\hat{a}}GM^2/c\) ( \(G\) is Newton constant and \(c\) is the speed of light).
epsilon: The fractional mass loss \(\epsilon\) of the initial black hole mass in ringdown radiation.
amplitude: The peak strain amplitude \(h_0\) of the waveform, given by
\begin{equation} h_0=\sqrt{\frac{5}{2}\epsilon}\left(\frac{GM}{c^2 r}\right) Q^{-\frac{1}{2}} F(Q)^{-\frac{1}{2}} g(a)^{-\frac{1}{2}}, \end{equation}
where \(F(Q) = 1 + 7/(24 Q^2)\), \(g(a) = 1 - 0.63(1-a)^{3/10}\) and \(r\) is the distance to the trigger.
snr: The signal-to-noise ratio of the trigger.
eff_dist: The effective distance to the trigger source in megaparsecs (Mpc).
sigma_sq: The variance of the matched filter used to find the trigger.

Definition at line 276 of file LIGOMetadataTables.h.

Data Fields
struct tagSnglRingdownTable *	next

CHAR	ifo [LIGOMETA_IFO_MAX]

CHAR	channel [LIGOMETA_CHANNEL_MAX]

LIGOTimeGPS	start_time

REAL8	start_time_gmst

REAL4	frequency

REAL4	quality

REAL4	phase

REAL4	mass

REAL4	spin

REAL4	epsilon

INT4	num_clust_trigs

REAL4	ds2_H1H2

REAL4	ds2_H1L1

REAL4	ds2_H1V1

REAL4	ds2_H2L1

REAL4	ds2_H2V1

REAL4	ds2_L1V1

REAL4	amplitude

REAL4	snr

REAL4	eff_dist

REAL8	sigma_sq

long	event_id

Field Documentation

◆ next

struct tagSnglRingdownTable* SnglRingdownTable::next

Definition at line 279 of file LIGOMetadataTables.h.

◆ ifo

CHAR SnglRingdownTable::ifo[LIGOMETA_IFO_MAX]

Definition at line 280 of file LIGOMetadataTables.h.

◆ channel

CHAR SnglRingdownTable::channel[LIGOMETA_CHANNEL_MAX]

Definition at line 281 of file LIGOMetadataTables.h.

◆ start_time

LIGOTimeGPS SnglRingdownTable::start_time

Definition at line 282 of file LIGOMetadataTables.h.

◆ start_time_gmst

REAL8 SnglRingdownTable::start_time_gmst

Definition at line 283 of file LIGOMetadataTables.h.

◆ frequency

REAL4 SnglRingdownTable::frequency

Definition at line 284 of file LIGOMetadataTables.h.

◆ quality

REAL4 SnglRingdownTable::quality

Definition at line 285 of file LIGOMetadataTables.h.

◆ phase

REAL4 SnglRingdownTable::phase

Definition at line 286 of file LIGOMetadataTables.h.

◆ mass

REAL4 SnglRingdownTable::mass

Definition at line 287 of file LIGOMetadataTables.h.

◆ spin

REAL4 SnglRingdownTable::spin

Definition at line 288 of file LIGOMetadataTables.h.

◆ epsilon

REAL4 SnglRingdownTable::epsilon

Definition at line 289 of file LIGOMetadataTables.h.

◆ num_clust_trigs

INT4 SnglRingdownTable::num_clust_trigs

Definition at line 290 of file LIGOMetadataTables.h.

◆ ds2_H1H2

REAL4 SnglRingdownTable::ds2_H1H2

Definition at line 291 of file LIGOMetadataTables.h.

◆ ds2_H1L1

REAL4 SnglRingdownTable::ds2_H1L1

Definition at line 292 of file LIGOMetadataTables.h.

◆ ds2_H1V1

REAL4 SnglRingdownTable::ds2_H1V1

Definition at line 293 of file LIGOMetadataTables.h.

◆ ds2_H2L1

REAL4 SnglRingdownTable::ds2_H2L1

Definition at line 294 of file LIGOMetadataTables.h.

◆ ds2_H2V1

REAL4 SnglRingdownTable::ds2_H2V1

Definition at line 295 of file LIGOMetadataTables.h.

◆ ds2_L1V1

REAL4 SnglRingdownTable::ds2_L1V1

Definition at line 296 of file LIGOMetadataTables.h.

◆ amplitude

REAL4 SnglRingdownTable::amplitude

Definition at line 297 of file LIGOMetadataTables.h.

◆ snr

REAL4 SnglRingdownTable::snr

Definition at line 298 of file LIGOMetadataTables.h.

◆ eff_dist

REAL4 SnglRingdownTable::eff_dist

Definition at line 299 of file LIGOMetadataTables.h.

◆ sigma_sq

REAL8 SnglRingdownTable::sigma_sq

Definition at line 300 of file LIGOMetadataTables.h.

◆ event_id

long SnglRingdownTable::event_id

Definition at line 301 of file LIGOMetadataTables.h.