Calibration of a fully populated lobster eye optic for SVOM

Charlotte H. Feldman; Richard Willingale; James Pearson; Valentin Aslanyan; Tony Crawford; Paul Houghton; Jon Sykes; Christopher Bicknell; Julian Osborne; Paul O'Brien; Miranda Bradshaw; Vadim Burwitz; Gisela Hartner; Andreas Langmeier; Yingyu Liao; Carlo Pelliciari; Diego Götz; Karine Mercier; Jean-Michel Le Duigou; François Gonzalez

doi:10.1117/12.2561739

13 December 2020 Calibration of a fully populated lobster eye optic for SVOM

Charlotte H. Feldman, Richard Willingale, James Pearson, Valentin Aslanyan, Tony Crawford, Paul Houghton, Jon Sykes, Christopher Bicknell, Julian Osborne, Paul O'Brien, Miranda Bradshaw, Vadim Burwitz, Gisela Hartner, Andreas Langmeier, Yingyu Liao, Carlo Pelliciari, Diego Götz, Karine Mercier, Jean-Michel Le Duigou, François Gonzalez

Author Affiliations +

Proceedings Volume 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray; 114441K (2020) https://doi.org/10.1117/12.2561739
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

The Space-based multi-band astronomical Variable Objects Monitor (SVOM) is a Chinese – French satellite mission due to be launched in the summer of 2022. It is composed of four instruments: ECLAIRs, for detecting X-ray and gamma-ray transients (4-250 keV); GRM, a gamma-ray spectrometer (15 keV-5 MeV); VT, a visible telescope and the Microchannel X-ray Telescope (MXT). The MXT’s main goal is to precisely localize, and spectrally characterize X-ray afterglows of Gamma-Ray Bursts. The MXT is a narrow-field-optimised lobster eye X-ray focusing telescope comprising an array of 25 square Micro Pore Optics (MPOs), with a detectorlimited field of view of ∼1 square degree, working in the energy band 0.2-10 keV. The SVOM qualification model (QM) MXT optic (MOP) was designed and built at the University of Leicester, and is the first complete, lobster eye optic to be X-ray tested. We present results from the PANTER facility (MPE), where a full calibration of the QM MOP was carried out. The response of the optic was studied at seven energies from C-K to Cu-K, and the effective area at multiple off-axis angles at each energy was measured. The focal length of the MOP was confirmed and the PSF was studied on and off-axis. In addition, we present details of the modelling and analysis, which was used to calculate the results from the test campaign. The effective area and PSF are in good agreement with the modelling, indicating that the optic is performing as expected.

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Charlotte H. Feldman, Richard Willingale, James Pearson, Valentin Aslanyan, Tony Crawford, Paul Houghton, Jon Sykes, Christopher Bicknell, Julian Osborne, Paul O'Brien, Miranda Bradshaw, Vadim Burwitz, Gisela Hartner, Andreas Langmeier, Yingyu Liao, Carlo Pelliciari, Diego Götz, Karine Mercier, Jean-Michel Le Duigou, and François Gonzalez "Calibration of a fully populated lobster eye optic for SVOM", Proc. SPIE 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, 114441K (13 December 2020); https://doi.org/10.1117/12.2561739

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