the art–xc telescope on board srghea.iki.rssi.ru/presentations/b5ca3690c7907d11596f... ·...

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COBE/DIRBE NIR intensity map of the Galaxy – reveals stellar mass density

Spectrum Roentgen Gamma (SRG) is an X-ray astrophysical observatory, developed by Russia in collaboration with Germany. The SRG observatory consists of two independent telescopes – eROSITA (Germany) and ART–XC (Russia).

Roman Krivonos on behalf of the ART-XC Team

IKI, Moscow, Russia

The ART–XC telescope on board SRG

0’ 1’ 3’

9’ 7’ 5’

12’ 15’ 18’ 4x4 mm

The ART-XC telescope: ①  VNIIEF, Sarov – design of telescope, QM X-ray

mirror systems, structure, tests, AIT ②  IKI, Moscow – CdTe DSSD X-ray detectors,

aboard computer and memory, thermal balance system control block, star sensor, X-ray ground calibration of detectors and mirror systems

③  MSFC/NASA – FM X-ray mirror systems and their ground calibration

④  Lavochkin Association, Khimki – MLI, heat pipes, pyropin

⑤  Obninsk Research and Production Enterprise "Technologiya“ – carbon fiber structure

X-ray mirror systems (MSFC/NASA): 1. Number of mirror systems 7 2. Number of nested mirror shells 28 3. Form of shell Wolter-I 4. FOV with detector ∅28.56 mm ∅ 36ʹ′ 5. Average on-axis HPD 32ʺ″ 6. Focal length 2700 mm 7. Length of shell 580 mm 8. Diameter of mirror shells 49 – 145 mm 9. Material of shells Ni/Co 10. Mirror coating materials Iridium

ART–XC PSF profile is well described by two King functions representing PSF core (Rc = ~14’’) and wings (Rc=200-300’’).

ART-XC focal plane detectors (IKI, Moscow):

1. CdTe manufacturer ACRORAD 2. Dimensions 30×30×1 mm3

3. Working area 28.56×28.56 mm2

4. Energy range 5 – 80 keV 5. Number of strips 48×48 6. Strip pitch 0.595 mm (∼45.45ʺ″)

7. Be entrance window ∅30 mm ×100 µm 8. ASIC VA64TA1 9. Dead time ≤1 ms

10. Working temperature - 30° C 11. Energy resolution 8.5% @ 14 keV

Current status eRosita and ART-XC undergo final assembly with the spacecraft on Lavochkin Association. The launch is planned in 2018.

CdTe image of the ART-XC PSF at 8 keV line. The image is taken during calibration tests at IKI using 60 m X-ray testing facility. The shape of the PSF was measured with a high-resolution CCD camera at MSFC.

The integrated spectrum over an aperture diameter 28.56 mm, when the detector is illuminated through the mirror system.

R=10’

10% of peak value cut