MR. ANIRBAN AIN

Gravitational Waves (GWs) from the early universe and unresolved astrophysical sources are expected to create a stochastic GW background (SGWB). The GW radiometer algorithm is well suited to probe such a background using data from ground based laser interferometric detectors. Radiometer analyses possesses a common temporal symmetry which can be exploited to fold the whole dataset for every detector pair, typically a few hundred to a thousand days of data, to only one sidereal day, without any compromise in precision. Folded data leads to orders of magnitude reduction in computation cost. The radiometer search is typically done assuming a spectrum of the SGWB. Computational cost of this search for each frequency bin (without the assumed spectrum) is few thousand times more. A blind all sky narrowband search is now possible with folded data.