GWTC-2.1 / GWTC-3 / GWTC-4 ✕ Vera Rubin LSST Footprint

Aitoff projection · equatorial coordinates (RA/Dec) · GW sky localization centroids
264BBH events total
—Inside Rubin footprint
—Coverage %
Rubin LSST footprint (Dec −72° to +12°)
GWTC-2.1 (O3a)
GWTC-3 (O3b)
GWTC-4 (O4a)
Inside Rubin footprint
Outside Rubin footprint
Sky localization centroids shown (median RA/Dec from PE posteriors). GW events have large sky error boxes (tens to thousands of deg²) — these dots show the most probable sky position only.
Rubin footprint: Dec −72° to +12°, ~18,000 deg² of southern sky. Galactic plane excluded from main survey. GWTC sky maps are distributed isotropically — Rubin will optically follow up any in-footprint transients.