LAL  7.1.6.1-25a63a4
LALSource Struct Reference

## Detailed Description

This structure contains gravitational wave source position (in Equatorial coördinates), and orientation angle.

The orientation is measured counter-clockwise with respect to the "line of ascending nodes", i.e. counter-clockwise with respect to a line perpendicular to the source's meridian and extending westwards. For a source in the Northern celestial hemisphere, and an observer in the Northern hemisphere standing such that they are facing South, this angle is measured counter-clockwise from a 3 o'clock position (pointing West) at the source. The polarization convention is chosen such that if the source orientation were zero, the source would be a pure $$+$$-polarized source.

Definition at line 103 of file DetResponse.h.

## Data Fields

CHAR name [LALNameLength]
name of source, eg catalog number More...

SkyPosition equatorialCoords
equatorial coordinates of source, in decimal RADIANS More...

REAL8 orientation
Orientation angle ( $$\psi$$) of source: counter-clockwise angle $$x$$-axis makes with a line perpendicular to meridian of source in Westward direction (i.e. More...

## ◆ name

 CHAR LALSource::name[LALNameLength]

name of source, eg catalog number

Definition at line 106 of file DetResponse.h.

## ◆ equatorialCoords

 SkyPosition LALSource::equatorialCoords

equatorial coordinates of source, in decimal RADIANS

Definition at line 107 of file DetResponse.h.

## ◆ orientation

 REAL8 LALSource::orientation

Orientation angle ( $$\psi$$) of source: counter-clockwise angle $$x$$-axis makes with a line perpendicular to meridian of source in Westward direction (i.e.

North of West), in decimal radians.

Definition at line 108 of file DetResponse.h.