التفاصيل البيبلوغرافية
| العنوان: |
Calibration of the ART-XC mirror modules at MSFC. |
| المؤلفون: |
Krivonos, R., Tkachenko, A., Burenin, R., Filippova, E., Lapshov, I., Mereminskiy, I., Molkov, S., Pavlinsky, M., Sazonov, S., Gubarev, M., Kolodziejczak, J., O'Dell, S., Swartz, D., Zavlin, Vyacheslav, Ramsey, B. |
| المصدر: |
Experimental Astronomy; Oct2017, Vol. 44 Issue 1, p147-164, 18p |
| مصطلحات موضوعية: |
X-ray telescopes, SPACE vehicles, FOCAL planes, ANGULAR distance, SPECTRUM analysis |
| الشركة/الكيان: |
UNITED States. National Aeronautics & Space Administration. George C. Marshall Space Flight Center |
| مستخلص: |
The Astronomical Röntgen Telescope X-ray Concentrator (ART-XC) is a hard X-ray telescope with energy response up to 30 keV, to be launched on board the Spectrum Röntgen Gamma (SRG) spacecraft in 2018. ART-XC consists of seven identical co-aligned mirror modules. Each mirror assembly is coupled with a CdTe double-sided strip (DSS) focal-plane detector. Eight X-ray mirror modules (seven flight and one spare units) for ART-XC were developed and fabricated at the Marshall Space Flight Center (MSFC), NASA, USA. We present results of testing procedures performed with an X-ray beam facility at MSFC to calibrate the point spread function (PSF) of the mirror modules. The shape of the PSF was measured with a high-resolution CCD camera installed in the focal plane with defocusing of 7 mm, as required by the ART-XC design. For each module, we performed a parametrization of the PSF at various angular distances Θ. We used a King function to approximate the radial profile of the near on-axis PSF (Θ < 9 arcmin) and an ellipse fitting procedure to describe the morphology of the far off-axis angular response (9 < Θ < 24 arcmin). We found a good agreement between the seven ART-XC flight mirror modules at the level of 10%. The on-axis angular resolution of the ART-XC optics varies between 27 and 33 arcsec (half-power diameter), except for the spare module. [ABSTRACT FROM AUTHOR] |
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