Matches in SemOpenAlex for { <https://semopenalex.org/work/W4380993397> ?p ?o ?g. }
- W4380993397 abstract "This paper reports the first detection of polarization in the X-rays for atoll-source 4U 1820-303, obtained with the Imaging X-ray Polarimetry Explorer (IXPE) at 99.999% confidence level (CL). Simultaneous polarimetric measurements were also performed in the radio with the Australia Telescope Compact Array (ATCA). The IXPE observations of 4U 1820-303 were coordinated with Swift-XRT, NICER, and NuSTAR aiming to obtain an accurate X-ray spectral model covering a broad energy interval. The source shows a significant polarization above 4 keV, with a polarization degree of 2.0(0.5)% and a polarization angle of -55(7) deg in the 4-7 keV energy range, and a polarization degree of 10(2)% and a polarization angle of -67(7) deg in the 7-8 keV energy bin. This polarization also shows a clear energy trend with polarization degree increasing with energy and a hint for a position-angle change of about 90 deg at 96% CL around 4 keV. The spectro-polarimetric fit indicates that the accretion disk is polarized orthogonally to the hard spectral component, which is presumably produced in the boundary/spreading layer. We do not detect linear polarization from the radio counterpart, with a 99.97% upper limit of 50% at 7.25 GHz." @default.
- W4380993397 created "2023-06-17" @default.
- W4380993397 creator A5000004709 @default.
- W4380993397 creator A5000570999 @default.
- W4380993397 creator A5001682364 @default.
- W4380993397 creator A5005121499 @default.
- W4380993397 creator A5006526111 @default.
- W4380993397 creator A5006696699 @default.
- W4380993397 creator A5007322942 @default.
- W4380993397 creator A5007390660 @default.
- W4380993397 creator A5008052402 @default.
- W4380993397 creator A5008582712 @default.
- W4380993397 creator A5008859500 @default.
- W4380993397 creator A5009220087 @default.
- W4380993397 creator A5010587713 @default.
- W4380993397 creator A5011270437 @default.
- W4380993397 creator A5012203328 @default.
- W4380993397 creator A5012346679 @default.
- W4380993397 creator A5012879871 @default.
- W4380993397 creator A5013129785 @default.
- W4380993397 creator A5013320112 @default.
- W4380993397 creator A5015991149 @default.
- W4380993397 creator A5016574610 @default.
- W4380993397 creator A5016889508 @default.
- W4380993397 creator A5017219138 @default.
- W4380993397 creator A5017499389 @default.
- W4380993397 creator A5018324841 @default.
- W4380993397 creator A5019085291 @default.
- W4380993397 creator A5019648923 @default.
- W4380993397 creator A5020173077 @default.
- W4380993397 creator A5020887298 @default.
- W4380993397 creator A5021142593 @default.
- W4380993397 creator A5021909416 @default.
- W4380993397 creator A5023022205 @default.
- W4380993397 creator A5024165306 @default.
- W4380993397 creator A5025652460 @default.
- W4380993397 creator A5025775625 @default.
- W4380993397 creator A5026031896 @default.
- W4380993397 creator A5027255654 @default.
- W4380993397 creator A5027604773 @default.
- W4380993397 creator A5028750791 @default.
- W4380993397 creator A5030169287 @default.
- W4380993397 creator A5030813123 @default.
- W4380993397 creator A5031221307 @default.
- W4380993397 creator A5031941627 @default.
- W4380993397 creator A5032322585 @default.
- W4380993397 creator A5034388424 @default.
- W4380993397 creator A5034427738 @default.
- W4380993397 creator A5034602434 @default.
- W4380993397 creator A5034842878 @default.
- W4380993397 creator A5034936145 @default.
- W4380993397 creator A5035571364 @default.
- W4380993397 creator A5036538777 @default.
- W4380993397 creator A5037063731 @default.
- W4380993397 creator A5037491568 @default.
- W4380993397 creator A5038788038 @default.
- W4380993397 creator A5041315673 @default.
- W4380993397 creator A5041320985 @default.
- W4380993397 creator A5042005600 @default.
- W4380993397 creator A5044171868 @default.
- W4380993397 creator A5044397718 @default.
- W4380993397 creator A5044953778 @default.
- W4380993397 creator A5045457594 @default.
- W4380993397 creator A5045482290 @default.
- W4380993397 creator A5047528307 @default.
- W4380993397 creator A5047842520 @default.
- W4380993397 creator A5048068822 @default.
- W4380993397 creator A5048327550 @default.
- W4380993397 creator A5048462485 @default.
- W4380993397 creator A5048662367 @default.
- W4380993397 creator A5049901789 @default.
- W4380993397 creator A5050763989 @default.
- W4380993397 creator A5051841242 @default.
- W4380993397 creator A5052400909 @default.
- W4380993397 creator A5053069750 @default.
- W4380993397 creator A5053581947 @default.
- W4380993397 creator A5054149471 @default.
- W4380993397 creator A5054515903 @default.
- W4380993397 creator A5055117597 @default.
- W4380993397 creator A5055588693 @default.
- W4380993397 creator A5057754812 @default.
- W4380993397 creator A5058925636 @default.
- W4380993397 creator A5059488809 @default.
- W4380993397 creator A5059680883 @default.
- W4380993397 creator A5061078161 @default.
- W4380993397 creator A5061987369 @default.
- W4380993397 creator A5063333932 @default.
- W4380993397 creator A5063856086 @default.
- W4380993397 creator A5063930897 @default.
- W4380993397 creator A5065647660 @default.
- W4380993397 creator A5065735182 @default.
- W4380993397 creator A5065783516 @default.
- W4380993397 creator A5067538195 @default.
- W4380993397 creator A5067740165 @default.
- W4380993397 creator A5068659130 @default.
- W4380993397 creator A5068677124 @default.
- W4380993397 creator A5069170121 @default.
- W4380993397 creator A5069215756 @default.
- W4380993397 creator A5070431044 @default.
- W4380993397 creator A5071097116 @default.