TY - JOUR T1 - Upper limits on the isotropic gravitational-wave background from the first part of LIGO, Virgo, and KAGRA’s fourth observing run JO - Physical Review D UR - https://eprints.whiterose.ac.uk/id/eprint/244860 UR - https://doi.org/10.1103/wq57-sjt2 PY - 2026/08/20 AU - Abac AG AU - Abouelfettouh I AU - Acernese F AU - Ackley K AU - Adamcewicz C AU - Adhicary S AU - Adhikari D AU - Adhikari N AU - Adhikari RX AU - Adkins VK AU - Afroz S et al ED - DO - DOI: 10.1103/wq57-sjt2 PB - American Physical Society (APS) VL - 114 IS - 4 Y2 - 2026/09/09 ER -