XL-Calibur Refereed Journals
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Development of CZT detectors for x-ray and gamma-ray astronomy
Lee, K et al., SPIE, 8142, 0D (2011)
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Design and tests of the hard x-ray polarimeter X-Calibur
Beilicke, M et al., SPIE, 8145, 06 (2011)
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Design and tests of the hard X-ray polarimeter X-Calibur
Beilicke, M et al., NIMPA, 692, 283 (2012)
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Optimization of the design of the hard X-ray polarimeter X-Calibur
Guo, Q et al., APh, 41, 63 (2013)
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Design and Performance of the X-ray Polarimeter X-Calibur
Beilicke, M et al., JAI, 3, 40008 (2014)
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X-ray polarimetry with X-Calibur
Guo, Q, PhD Thesis, 311 (2014)
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An unfolding method for X-ray spectro-polarimetry
Kislat, F et al., APh, 64, 40 (2015)
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High Energy Polarization of Blazars: Detection Prospects
Chakraborty, N, Pavlidou, V & Fields, B, ApJ, 798, 16 (2015)
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Using Simulations of Black Holes to Study General Relativity and the Properties of Inner Accretion Flow
Hoormann, J, PhD Thesis, 76 (2016)
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Modern Assessment of the High-Energy Background Environment at Small Atmospheric Depths Using the X-Calibur X-Ray Polarimeter and Its Implications
Amini, R, PhD Thesis, 133 (2016)
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Design of the Telescope Truss and Gondola for the Balloon-Borne X-ray Polarimeter X-Calibur
Kislat, F et al., JAI, 6, 40003 (2017)
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Resonant Inverse Compton Scattering Spectra from Highly Magnetized Neutron Stars
Wadiasingh, Z et al., ApJ, 854, 98 (2018)
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Optimization of the design of X-Calibur for a long-duration balloon flight and results from a one-day test flight
Kislat, F et al., JATIS, 4, 011004 (2018)
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Simulation of Black Hole Inner Accretion Disk-Corona and Optimization of the Hard X-ray Polarimeter, X-Calibur
Beheshtipour, B, PhD Thesis, 98 (2018)
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Observations of a GX 301-2 Apastron Flare with the X-Calibur Hard X-Ray Polarimeter Supported by NICER, the Swift XRT and BAT, and Fermi GBM
Abarr, Q et al., ApJ, 891, 70 (2020)
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Current status of the x-ray mirror for the XL-Calibur experiment
Hattori, K et al., SPIE, 11444, 5W (2020)
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XL-Calibur - a second-generation balloon-borne hard X-ray polarimetry mission
Abarr, Q et al., APh, 126, 02529 (2021)
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The Relative Importance of Faraday Rotation and QED Birefringence for the Linear Polarization of X-Rays from Mass-accreting Black Holes
Krawczynski, H, Lisalda, L & Gammie, C, ApJ, 914, 51 (2021)
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XL-Calibur - a second-generation balloon-borne hard X-ray polarimetry mission
Abarr, Awaki et al., APh, 126, 102529 (2021)
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Performance of the X-Calibur hard X-ray polarimetry mission during its 2018/19 long-duration balloon
flight
Abarr, Q., et al., APh, 143, 102749 (2022)
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The design and performance of the XL-Calibur anticoincidence shield
Iyer, Kiss et al., NIMPA, 1048, 167975 (2023)
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Systematic effects on a Compton polarimeter at the focus of an X-ray mirror
Aoyagi, M., et al., APh, 158, 102944 (2024)
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XL-Calibur measurements of polarized hard X-ray emission from the Crab
Awaki, Baring et al., MNRAS, 540, L34 (2025)
Latest News
08 Aug 2025
The XL-Calibur archive opens at the HEASARC for the initial data release.
The HEASARC currently holds event and spectra data, with calibration data slated to be released in a future update.
19 Mar 2025
Publication of the first results from the 2024 XL-Calibur observations of the Crab Nebula and Pulsar.
14 Jul 2024
The XL-Calibur mission concluded a 6-day long flight, terminating close to Kugluktuk, Nunavut, Canada. During the flight,
XL-Calibur successfully gathered 4 days of observational data.
09 Jul 2024
The XL-Calibur balloon from NASA was successfully
launched at 05:04 local time on the 9th of July from Esrange Space Center (Sweden).
The flight is expected to last 4-5 days and it is possible
to follow its journey across the Atlantic
before landing in northern Canada.
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