Domenico Viscolo
A5021175979- Astrophysical Phenomena and Observations
- Gamma-ray bursts and supernovae
- Mechanics and Biomechanics Studies
- Pulsars and Gravitational Waves Research
- Stellar, planetary, and galactic studies
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
2023-2024
University of Pisa
2023
Abstract We present the IXPE observation of GRB 221009A, which includes upper limits on linear polarization degree both prompt and afterglow emission in soft X-ray energy band. 221009A is an exceptionally bright gamma-ray burst (GRB) that reached Earth 2022 October 9 after traveling through dust Milky Way. The Imaging Polarimetry Explorer (IXPE) pointed at 11 to observe, for first time, 2–8 keV a afterglow. set limit 13.8% 99% confidence level. This result provides constraints jet opening...
Abstract A large energy-dependent X-ray polarization degree is detected by the Imaging Polarimetry Explorer (IXPE) in high-soft emission state of black hole binary 4U 1630–47. The highly significant detection (at ≈50 σ confidence level) an unexpectedly high polarization, rising from ∼6% at 2 keV to ∼10% 8 keV, cannot be easily reconciled with standard models thin accretion disks. In this work, we compare predictions different theoretical IXPE data and conclude that observed properties are...
Large energy-dependent X-ray polarization degree is detected by the Imaging Polarimetry Explorer ({IXPE}) in high-soft emission state of black hole binary 4U 1630--47. The highly significant detection (at $\approx50\sigma$ confidence level) an unexpectedly high polarization, rising from $\sim6\%$ at $2$ keV to $\sim10\%$ $8$ keV, cannot be easily reconciled with standard models thin accretion discs. In this work we compare predictions different theoretical {IXPE} data and conclude that...
We present the IXPE observation of GRB 221009A which includes upper limits on linear polarization degree both prompt and afterglow emission in soft X-ray energy band. is an exceptionally bright gamma-ray burst (GRB) that reached Earth 2022 October 9 after travelling through dust Milky Way. The Imaging Polarimetry Explorer (IXPE) pointed at 11 to observe, for first time, 2-8 keV a afterglow. set limit 13.8% 99% confidence level. This result provides constraints jet opening angle viewing GRB,...