SRG

1X-RAY Astronomy 2009, Bologna, 11 September, 2009

Spectrum-Roentgen-Gammaastrophysical project,

current status

Mikhail Pavlinsky (IKI, Moscow)

on behalf of SRG team

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News – August 18, 2009, Roscosmos (Russia) and DLR (Germany) signed an Agreement «On cooperation in the framework of Spectrum-Roentgen-Gamma orbital astrophysical project»

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Roscosmos, RussiaSpace Research Institute, IKI, Moscow, RussiaLavochkin Association, Khimki, RussiaVNIIEF, Sarov, RussiaMax-Planck-Institute for Astrophysics, MPA, Garching, GermanyIstitut fur Astronomie und Astrophysik, Univ. Tubingen, GermanyAstrophysikalishes Institut Potsdam, Germany University Erlangen-Nuernberg, GermanyHamburg University, GermanyMax-Planck-Institute for Extraterrestrial Physics, MPE, Garching, GermanyDLR, Germany

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– S/C to be launched in 2012 from Baikonur– Rocket Soyuz-2/1b + buster Fregat, with gravity

manoeuvre around the Moon– Halo-orbit around L2– Platform Navigator (Lavochkin Association)– S/C total mass 2200 kg– Payload − 1110 kg, 800 W:

eROSITA (MPE, DLR, Germany), X-ray mirror telescopes, 0.5−10 keV

ART-XC (IKI + VNIIEF, Roscosmos, Russia), X-ray mirror telescopes, 6−30 keV

– Life time − 7 years

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2009

June, 2008

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Navigator

Solar panels drive

mechanism

On-board control

system, radio

system and TMS

equipment

Flywheel engines

RadiatorSolar panels Propulsion

system

Body

Tank

S/C dry mass 900 kg

S/C propellant up to 300 kg

PL mass 2000 kg

PL power 1500 W (HEO)

PL power 600 W (LEO)

Pointing 2

Stabilization 5

Stabilization rate 0.36/s

Reappointing rate 0.25/s

Life time 7 years

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The three months – flight to L2, verification and calibration of payload

4 years – an all sky survey

3 years – on follow-up pointed observations of a selection of the most interesting galaxy clusters and AGNs.

Observing strategy:

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eROSITA @ ART-XC on-axis effective area and grasp

2500 cm2 @ 1.4 keV 510 cm2 @ 7 keV

1100 cm2deg2 @ 1.4 keV 45 cm2deg2 @ 7 keV

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The study of the large-scale structure of the Universe with 100 000 galaxy clusters

The exploration of the growth and cosmological evolution of supermassive Black holes in the Universe with sample 3 million AGNs

The scientific goals of the SRG/eROSITA all-sky survey:

3.51014 M (T4.5 keV) up to z=2

2.31014 M (T3.5 keV) up to z=1

1014 M (T 2 keV) up to z=0.4

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and with ART-XC – complementary instrument All-sky survey at 6 11 keV energy band with sensitivity

3  10-13 erg s-1 cm-2 keV-1 discovery at local Universe several thousands new AGNs

Study of massive nearby galaxies clusters with T 5 keV in the pointing observation mode

Study of intrinsically heavily absorbed/Compton thick AGNs ( NH  3  1023 см-2)

Survey of galactic black holes and neutron stars with low luminosity

Study heavily obscured galactic X-ray binary systems

Study broad band spectra of Galactic objects (including binary systems, anomalous pulsars, SNRs) up to 30 keV, spectroscopy and timing of point sources

Study of cyclotron lines features of X-ray pulsars with energy resolution 1.5 keV up to 30 keV

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Survey

Параметры обзора всего неба eROSITA:Параметры обзора всего неба eROSITA:

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~100 000 Clusters3 Million AGN~20 QSO at z>7

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eROSITA (MPE, DLR)

Number of mirror systems 7 Number of nested mirror shells54 FOV 1 On-axis angular resolution 15 (1 keV) Energy range 0.2 – 12 keV Diameter of 1 mirror system 358 mm Form of shell Wolter-1 Focal length 1600 mm Material of mirror shells Nickel Mirror coating Gold Total weight 760 kg Power consumption 405 W

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eROSITA (MPE, DLR) Detector principle pn-CCD, Si Size

28.828.8 mm2

Energy resolution 130 eV @ 6 keV Pixels 384384 Pixel size 7575 µm2

Circle time 50 msec Working temperature 80 C

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Number of mirror systems 7 Number of nested mirror shells28 FOV 32 On-axis angular resolution 1 Energy range 6 – 30 keV Diameter of mirror system 148 mm Form of shell cone-cone Length of shell 580 mm Focal length 2700 mm Material of mirror shells Nickel Mirror coating Iridium Total weight 350 kg Power consumption 300 W

ART-XC (IKI, VNIIEF, Roscosmos)

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Number of detectors 7 Detector principle DSSD CdTe CdTe manufacturer ACRORAD Size 25.625.6 mm2

Thickness 1 mm Number of strips 6464 Strip pitch 0.4 mm Energy resolution 10% @ 14 keV Time resolution 1 ms Working temperature 40 35 C Entrance window 100 m, Be ASIC VA64TA Background ≤10-2 cnt s-1 cm-2 keV-

1

Prototype with 32 pixels

Am241 ART-XC, detector

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ART-XC

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Exposition time map for ½ year all-sky survey. The rotational axis is directed on Sun constantly.

The minimal 4-year exposition is 1900 sec deg-2. The survey poles position are coincide with ecliptic poles. The total size of 2 zones with exposition larger than 8000 sec deg-2 (near the survey poles) is 1260 deg2.

ART-XC

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ART-XC