Status of the eROSITA Telescope testing and calibrating the x-ray mirror assemblies

Burwitz, V.; Predehl, P.; Bräuninger, H.; Burkert, Wolfgang; Dennerl, K.; Eder, Josef; Friedrich, Péter; Fürmetz, Maria; Grisoni, Gabriele; Hartner, Gisela; Marioni, Fabio; Menz, Benedikt; Pfeffermann, E.; Valsecchi, Giuseppe

doi:10.1117/12.2024869

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…The PANTER X-ray test facility is described in Freyberg et al (2005) and Burwitz et al (2013). We installed the GPD in the test room (see Figure 2) and first searched for the best focus position after centering the X-ray spot on the detector active area.…”

Section: Configuration Of the Set-upmentioning

confidence: 99%

The Imaging Properties of the Gas Pixel Detector as a Focal Plane Polarimeter

Fabiani

Costa

Monte

et al. 2014

ApJS

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X-rays are particularly suited to probing the physics of extreme objects. However, despite the enormous improvements of X-ray astronomy in imaging, spectroscopy, and timing, polarimetry remains largely unexplored. We propose the photoelectric polarimeter Gas Pixel Detector (GPD) as a candidate instrument to fill the gap created by more than 30 yr without measurements. The GPD, in the focus of a telescope, will increase the sensitivity of orders of magnitude. Moreover, since it can measure the energy, the position, the arrival time, and the polarization angle of every single photon, it allows us to perform polarimetry of subsets of data singled out from the spectrum, the light curve, or an image of the source. The GPD has an intrinsic, very fine imaging capability, and in this work we report on the calibration campaign carried out in 2012 at the PANTER X-ray testing facility of the Max-PlanckInstitut für extraterrestrische Physik of Garching (Germany) in which, for the first time, we coupled it with a JET-X optics module with a focal length of 3.5 m and an angular resolution of 18 arcsec at 4.5 keV. This configuration was proposed in 2012 aboard the X-ray Imaging Polarimetry Explorer (XIPE) in response to the ESA call for a small mission. We derived the imaging and polarimetric performance for extended sources like pulsar wind nebulae and supernova remnants as case studies for the XIPE configuration and also discuss possible improvements by coupling the detector with advanced optics that have a finer angular resolution and larger effective areas to study extended objects with more detail.

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Section: Configuration Of the Set-upmentioning

confidence: 99%

The Imaging Properties of the Gas Pixel Detector as a Focal Plane Polarimeter

Fabiani

Costa

Monte

et al. 2014

ApJS

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“…In the case of eROSITA [3,4,5] 7 co-aligned 54 shell Wolter-1 mirror modules [6,7,8] with a focal length of 1600mm are mounted in the carbon fiber telescope structure together with their corresponding CCD cameras [9,10]. The telescope is mainly designed to work as a survey telescope with the added capability of working in a pointing mode after the 4 years of the all-sky survey have been completed.…”

Section: Introductionmentioning

confidence: 99%

The calibration and testing of the eROSITA X-ray mirror assemblies

et al. 2014

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In 2016 the X-ray Survey Telescope eROSITA, designed and built at MPE, will be launched on the Russian SpektrRoentgen-Gamma Mission. A compact bundle of 7 co-aligned mirror modules with a focal length of 1600 mm and 54 nested mirror shells each form the X-ray telescope. The sensitivity of the telescope in terms of effective area, field-ofview (61'), and angular resolution (~16" HEW on-axis) will yield a high grasp of about 1000 cm 2 deg 2 around 1 keV with an average angular resolution of ~26" HEW over the field-of-view (30" including optical and spacecraft error contributions). All flight mirror modules including a flight spare have been completed and passed their acceptance tests in December 2013. The mirror modules now have all been mated with their corresponding X-ray baffles to form mirror assemblies and the passed rigorous environmental vibration and thermal cycling tests. Here we report on the results of these measurements and on the calibration measurements planned for the completed flight mirror assemblies.

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The structural design and thermo-mechanical performance of the FXT for the EP mission

Wang

Eder

et al. 2023

Exp Astron

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Status of the eROSITA Telescope testing and calibrating the x-ray mirror assemblies

Cited by 4 publications

References 8 publications

The Imaging Properties of the Gas Pixel Detector as a Focal Plane Polarimeter

The Imaging Properties of the Gas Pixel Detector as a Focal Plane Polarimeter

The calibration and testing of the eROSITA X-ray mirror assemblies

The structural design and thermo-mechanical performance of the FXT for the EP mission

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