XL-Calibur Refereed Journals

  1. Development of CZT detectors for x-ray and gamma-ray astronomy
    Lee, K et al., SPIE, 8142, 0D (2011)
  2. Design and tests of the hard x-ray polarimeter X-Calibur
    Beilicke, M et al., SPIE, 8145, 06 (2011)
  3. Design and tests of the hard X-ray polarimeter X-Calibur
    Beilicke, M et al., NIMPA, 692, 283 (2012)
  4. Optimization of the design of the hard X-ray polarimeter X-Calibur
    Guo, Q et al., APh, 41, 63 (2013)
  5. Design and Performance of the X-ray Polarimeter X-Calibur
    Beilicke, M et al., JAI, 3, 40008 (2014)
  6. X-ray polarimetry with X-Calibur
    Guo, Q, PhD Thesis, 311 (2014)
  7. An unfolding method for X-ray spectro-polarimetry
    Kislat, F et al., APh, 64, 40 (2015)
  8. High Energy Polarization of Blazars: Detection Prospects
    Chakraborty, N, Pavlidou, V & Fields, B, ApJ, 798, 16 (2015)
  9. Using Simulations of Black Holes to Study General Relativity and the Properties of Inner Accretion Flow
    Hoormann, J, PhD Thesis, 76 (2016)
  10. 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)
  11. Design of the Telescope Truss and Gondola for the Balloon-Borne X-ray Polarimeter X-Calibur
    Kislat, F et al., JAI, 6, 40003 (2017)
  12. Resonant Inverse Compton Scattering Spectra from Highly Magnetized Neutron Stars
    Wadiasingh, Z et al., ApJ, 854, 98 (2018)
  13. 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)
  14. Simulation of Black Hole Inner Accretion Disk-Corona and Optimization of the Hard X-ray Polarimeter, X-Calibur
    Beheshtipour, B, PhD Thesis, 98 (2018)
  15. 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)
  16. Current status of the x-ray mirror for the XL-Calibur experiment
    Hattori, K et al., SPIE, 11444, 5W (2020)
  17. XL-Calibur - a second-generation balloon-borne hard X-ray polarimetry mission
    Abarr, Q et al., APh, 126, 02529 (2021)
  18. 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)
  19. XL-Calibur - a second-generation balloon-borne hard X-ray polarimetry mission
    Abarr, Awaki et al., APh, 126, 102529 (2021)
  20. 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)
  21. The design and performance of the XL-Calibur anticoincidence shield
    Iyer, Kiss et al., NIMPA, 1048, 167975 (2023)
  22. Systematic effects on a Compton polarimeter at the focus of an X-ray mirror
    Aoyagi, M., et al., APh, 158, 102944 (2024)
  23. 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.