2025/09/09 by Jack T. Dinsmore, Roger W. Romani, Dinsmore, Jack T. +1
Physics and Astronomy · #Particle Detector Development and Performance #X-ray Spectroscopy and Fluorescence Analysis #Astrophysical Phenomena and Observations
paper · pdf · doi:10.3847/1538-4357/ae0f95
Abstract As the Imaging X-ray Polarimetry Explorer (IXPE) measures increasingly faint sources, the need for precise polarimetry extraction becomes paramount. In addition to previously described neural-net weights, we introduce here point-spread function weights and particle background weights, which can be critical for faint sources. In some cases these can be augmented by time/phase and energy weights. We provide a publicly available analysis tool to incorporate these new weights, validate our method on simulated data, and test it on archival IXPE observations. Together these weights decrease the area of the polarization uncertainty contour by a factor of 2 compared to baseline IXPE analysis and will be essential for background-limited IXPE observations.