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... | |
CHAR LALSource::name[LALNameLength] |
name of source, eg catalog number
Definition at line 106 of file DetResponse.h.
SkyPosition LALSource::equatorialCoords |
equatorial coordinates of source, in decimal RADIANS
Definition at line 107 of file DetResponse.h.
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.