Mapping the X-ray Sky with SRG: First Results from eROSITA and ART-XC

Вackground Measurements by the ART-XC X-ray Detectors near L2 point

16 Mar 2020, 13:00

15m

Garching

Oral Presentation SRG Instruments and Operations

Speaker

Dr Alexey Tkachenko (Space Research Institute, Moscow)

Description

The Astronomical Roentgen Telescope – X-ray Concentrator (ART-XC) is one of two X-ray telescopes onboard the SRG mission launched on July 13, 2019 from Baikonur. ART-XC consists of seven co-aligned mirror modules coupled with seven focal plane CdTe double-sided strip detectors. The ART-XC detectors operate in the energy range from 4 keV to over than 100 keV, while the effective area of the ART-XC mirror modules is negligible at energies above 30 keV. In this energy range the ART-XC detectors background is completely determined by the charged particles. We present the results of measurements of the ART-XC detector background near the Sun-Earth L2 point. The detector background was highly stable in the energy range of 40–100 keV during the first few months of SRG operation at the L2 and the background variations did not exceed ±2%. These are the first background measurements by an X-ray detector near L2 point.