Very fast stochastic gravitational wave background map making using folded data

Understand

A stochastic gravitational-wave background (SGWB) is expected from the superposition of a wide variety of independent and unresolved astrophysical and cosmological sources from different stages in the evolution of the Universe.

• Radiometric techniques are used to make sky maps of anisotropies in the SGWB by cross-correlating data from pairs of detectors.
• The conventional searches can be made hundreds of times faster through the folding mechanism introduced recently.
• Here we present a newly developed algorithm to perform the SGWB searches in a highly efficient way.