The Critical Role of LIGO-India in the Era of Next-Generation Observatories

Understand

We examine the role of LIGO-India in facilitating multi-messenger astronomy in the era of next generation observatories.

• A network with two L-shaped Cosmic Explorer (CE) detectors and one triangular Einstein Telescope (ET) would precisely localize nearly the entire annual binary neutron star merger population up to a redshift of 0.5--over 10,000 events would be localized within $10\ \mathrm{deg}^2$, including approximately 150 events within $0.1\ \mathrm{deg}^2$.
• Luminosity distance would be measured to within 10% for over 9,000 events and within 1% for $\sim 100$ events.
• Surprisingly, replacing the 20 km CE detector with LIGO-India operating at A$^\sharp$ sensitivity (I$^\sharp$) yields nearly identical performance.