We describe an efficient method for extracting the parts of $D$-dimensional loop integrals that are needed to derive observables in classical general relativity from scattering amplitudes. Our approach simplifies soft-region integration by judiciously combining terms before final integrations. demonstrate computing required black-hole second Post-Minkowskian order Einstein gravity coupled scala...

Aims: To provide the first demonstration of STIX Fourier-transform X-ray imaging using semi-calibrated (amplitude-only) visibility data acquired during Solar Orbiter's cruise phase. Methods: We use a parametric approach by which amplitudes are fitted means two non-linear optimization methods: fast meta-heuristic technique inspired social behavior, and Bayesian Monte Carlo sampling method, which...