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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)

Latest News

Oct 2023

New XL-Calibur launch window
The new XL-Calibur launch window from Kiruna, Sweden, is set from May 7 to July 15 2024.

Oct 2022

Update on the XL-Calibur Jul 2022 flight
the 6-day long flight had to contend with an accidental drop of the entire flight ballast at one side of the gondola, leading to 3.5 days of recovery operations without science observations. Furthermore, a mirror alignment error prevented the observations of the X-ray targets in the remaining time.

12 Jul 2022

Successful XL-CALIBUR launch
XL-CALIBUR was launched in the early morning hours of 12 July 2022 (local time) from Esrange under excellent launch conditions. The balloon carried the payload to 130,000 feet altitude until the mission was terminated over northern Canada on July 18, 2022.

30 Jun 2022

XL-CALIBUR launch attempt #2
XL-CALIBUR planned launch early 1 July 2022 scrubbed due to wind conditions. Next planned launch attempt 2 July 2022 (early morning local time)

24 Jun 2022

XL-CALIBUR launch scrubbed
The payload was rigged for flight, but weather conditions prevented the planned launch.

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