Figure 4: Source localization by triangulation for the aLIGO–AdV network. The locations of the
three detectors are indicated by black dots, with LIGO Hanford labeled H; LIGO Livingston as
L, and Virgo as V. The locus of constant time delay (with associated timing uncertainty) between
two detectors forms an annulus on the sky concentric about the baseline between the two sites
(labeled by the two detectors). For three detectors, these annuli may intersect in two locations. One
is centered on the true source direction (
), while the other (
) is its mirror image with respect
to the geometrical plane passing through the three sites. For four or more detectors there is a unique
intersection region of all of the annuli. Figure adapted from [41].
), while the other () is its mirror image with respect
to the geometrical plane passing through the three sites. For four or more detectors there is a unique
intersection region of all of the annuli. Figure adapted from [41].