Probing anisotropies of gravitational-wave backgrounds with a space-based interferometer. III. Reconstruction of a high-frequency sky map
- Research Center for the Early Universe (RESCEU), School of Science, University of Tokyo, Tokyo 113-0033 (Japan)
We develop a numerical scheme to make a high-frequency skymap of gravitational-wave backgrounds (GWBs) observed via a space-based interferometer. Based on the cross correlation technique, the intensity distribution of anisotropic GWB can be directly reconstructed from the time-ordered data of cross correlation signals, with full knowledge of the detector's antenna pattern functions. We demonstrate how the planned space interferometer, LISA, can make a skymap of GWB for a specific example of anisotropic signals. At the frequency higher than the characteristic frequency f{sub *}=1/(2{pi}L), where L is the arm-length of the detector, the reconstructed skymap free from the instrumental noise potentially reaches the angular resolution up to the multipoles l{approx}10. The presence of instrumental noises degrades the angular resolution. The resultant skymap has angular resolution with multipoles l{<=}6{approx}7 for the anisotropic signals with signal-to-noise ratio S/N>5.
- OSTI ID:
- 20864130
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 74, Issue 10; Other Information: DOI: 10.1103/PhysRevD.74.104022; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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