Einstein probe wide field telescope flight mirror module characterization at PANTER test facility

Surangkhana Rukdee; Vadim Burwitz; Gisela Hartner; Thomas Schmidt; Andreas Langmeier; Thomas Müller; Peter Friedrich; Charlotte Feldman; Paul O'Brien; Gillian Butcher; Richard Willingale; Chen Zhang; Zhixing Ling; Yanfeng Dai; Weimin Yuan

doi:10.1117/12.2677479

5 October 2023 Einstein probe wide field telescope flight mirror module characterization at PANTER test facility

Surangkhana Rukdee, Vadim Burwitz, Gisela Hartner, Thomas Schmidt, Andreas Langmeier, Thomas Müller, Peter Friedrich, Charlotte Feldman, Paul O'Brien, Gillian Butcher, Richard Willingale, Chen Zhang, Zhixing Ling, Yanfeng Dai, Weimin Yuan

Author Affiliations +

Proceedings Volume 12679, Optics for EUV, X-Ray, and Gamma-Ray Astronomy XI; 1267910 (2023) https://doi.org/10.1117/12.2677479
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

The Einstein Probe Wide-field X-ray Telescope (WXT), planned to launch in late 2023, is dedicated to the study of time-domain high-energy astrophysics to monitor variable objects in the range of 0.5 to 4.0 keV. The full wide-field telescope is made up of 12 Lobster-eye modules. Each module consists of an optics assembly of 36 Micro Pore Optic (MPO) chips divided into four sectors and four CMOS detectors positioned in the respective focal plane of each sector. At the PANTER x-ray test facility, we characterize the performance of one of the 12 flight mirror modules. The full flight model calibration includes measurements for detailed focus searches, extended mosaic scans of the on-axis Point Spread Function (PSF), and Focal Plane Mappings (FPM) covering various off-axis, and one on-axis exposure, performed for each individual mirror sector and at various energies. The best focus positions were determined at the energies C-K, O-K, Cu-L, and Ti-K. The optic was characterized in terms of Half Energy Width (HEW) and effective area on-axis and off-axis at the energies C-K (only FPM), Ti-L, O-K, Cu-L, Al-K, W-M, and Ti-K, and two broad energy ranges, very low Energy band continuum (vlEbc 0.2 to 2.0 keV), and low Energy band continuum (lEbc 0.8 to 4.0 keV). The measurements were made using the TRoPIC detector (pnCCD), a prototype of the eROSITA cameras, and a high spatial resolution detector (PIXI). The focal plane mapping results show symmetrically distributed Point Spread Functions (PSFs) over the large field of view of ±4.7 degrees of each sector. The effective area results of the energy band continua match well with the theoretical model. We will discuss the test setup, measurements, and results of the full performance of the WXT Flight Mirror module (FM5) tested at PANTER.

Conference Presentation

Citation Download Citation

Surangkhana Rukdee, Vadim Burwitz, Gisela Hartner, Thomas Schmidt, Andreas Langmeier, Thomas Müller, Peter Friedrich, Charlotte Feldman, Paul O'Brien, Gillian Butcher, Richard Willingale, Chen Zhang, Zhixing Ling, Yanfeng Dai, and Weimin Yuan "Einstein probe wide field telescope flight mirror module characterization at PANTER test facility", Proc. SPIE 12679, Optics for EUV, X-Ray, and Gamma-Ray Astronomy XI, 1267910 (5 October 2023); https://doi.org/10.1117/12.2677479

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