The Hard X-ray Modulation Telescope Mission Zhang, Shuang Nan 张 双 南 Tsinghua Center for Astrophysics (THCA) and Physics Department Tsinghua University, Beijing, China

Current Status of the HXMT Mission Hard X-ray Modulation Telescope (HXMT) 973 Major State Basic Research Project in China since April 2000 (Scientific Definition and Technology Demonstration Phase) 20 Million Yuan from Ministry of Science and Technology 10 Million Yuan from Tsinghua University 10 Million Yuan from Chinese Academy of Sciences total about $5M Principal Investigator: Profs. Li, Tipei Main participating institutions: Chinese Academy of Sciences: Institute of High Energy Physics Center for Space Science and Application Research Tsinghua University: Astrophysics Center, Physics Department, Engineering Physics Department, Space Center Apply for full satellite mission in 2003/2004 Full mission cost about $100M July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

Main Scientific Goals Main Scientific Goals Deep hard X-ray all-sky survey between 10-200 keV Seyfert II AGNs Quasars Galactic Plane Diffuse X-ray Emission Pointed observations of faint objects Seyfert AGNs X-ray binaries High sensitivity timing studies July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

Characteristics of the HXMT Mission Mass ~1100kg (payload ~700 kg) Dimension 1.7×1.7×1.2m (L×W×H) Nominal Mission lifetime 2 years Orbit Altitude 550km，Inclination 43° Attitude Three-axis stabilized Control precision：±0.25° Stability: 0.005 °/s Measurement accuracy: <0.01° Main Detector NaI(Tl)/CsI(Na) Phoswich Total Detect Area ~5000 cm2 Energy Range 20～250 keV Energy Resolution ~22% (@60keV) Continuum Sensitivity ~3.0×10-7 ph cm-2 s-1 keV-1 (3σ@100keV,105s) Field of View 5.7°x 5.7°（FWHM） Source Location ≤1’´(20) Angular Resolution ≤5’´(20) July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

HXMT Telescope July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

Structural Configuration (In the orbit) July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

Structural Configuration Launch State with 3 Side-Plates Removed July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

Structural Configuration Instruments Arrangement and 2-D Dimensions 70 mm 490 mm 97.5mm 880 mm July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

Structural Configuration Exploded View July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

Structural Configuration Instruments Arrangement on Top Surface of Mid-Plate July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

Structural Configuration Instruments Arrangement on Bottom Surface of Mid-Plate July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

Structural Configuration Instruments Arrangement on Top Plate July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

The Configuration of the HXMT Active Shield Collimator Phoswich detector Structures PMT July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

The Main Detector system of the HXMT July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

The Collimator of the HXMT July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

Charged particle anti-coincidence shield There are 12 anti-coincidence shield detectors in the HXMT, 6 are on the top and 6 surrounding the HXMT. The detectors are plastic scintillation crystals. When a charged particle enters the detector, a interaction will occur and create a “scintillation”(pulse of light). The light produced by the interaction is viewed through optical fiber light guide in both ends by two PMT. July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

Outside profile July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

Shielding consist of Shielding mode passive Active CsI(Na) CPS Lead (2mm) CsI(Na) CPS July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

The structure of CPS Roof #1 #2 #3 #4 #5 #6 Side July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

The fibers distribution in PS board Optical Fibers PMT Maximum photo collection: >99.8% Minimum photo collection: >99.5% July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

The structure of the HXMT July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

The ground examination system July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

The Background simulation of the HXMT July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

The sensitivity of the HXMT July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

The sensitivity of the HXMT July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

The imaging performance of the HXMT 20 sigma source´ Source Location <0.5’´ Angular resolution<5’´ July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

The imaging performance of the HXMT Two point sources separated by 17’ July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

This is a graph showing the HXMT Satellite in orbit It is in earth oriented mode. The red zone below is south atlantic geomagnetic anomoly region How to design the orbit to minimize the effects of SAA is an important issue. July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

This is the ground trace of satellite subpoint for seven days. The black point here is possible ground station location in china. July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

Observation modes Survey mode of HXMT All sky scan mode 3-axis stablized earth oriented: roll angle=0º , region span=-43º-43º, 66days roll angle=30º , region span=-13º-73º, 66days roll angle=-30º , region span=-73º-13º, 66days Pointing and deep scanning of selected sky region The requirements of ADCS is based on HXMT mission objectives. In order to fulfill the objectives, the HXMT mission is divided into several mission phase. For every phase, a survey mode is defined. There are two main mission phases and two corresponding survey mode: The first is all sky scan phase .In this mode, the attitude of HXMT satellite is 3-axis stablized and earth oriented. The all-sky survey is carried through the motion of the satellite in its orbit and precession of the orbital plane. By rotating about the roll axis by thirty degrees and minus thirty degrees , HXMT is able to cover most sky region. This scan phase will take six months to complete. The second phase is pointing and deep scanning of selected sky region. The satellite will operate in inertial fixed attitude to stare the interested sky region. For each point in the sky region, the period of attitude stablization is thirty minutes.Then the satellite is maneuvered to observe next point. This phase will run through the rest of mission lifetime ,about eigthteen months. July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

Possible secondary instruments Soft X-ray telescope BeppoSAX Spare Module 88 cm2 @ 0.1 keV; 56 cm2 @ 7 keV Wide field X-ray monitor CCD? Silicon drift chambers? BeppoSAX space module? July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan

Thank you Center for Astrophysics, Tsinghua University July 6, 2002, IAU Regional Meeting, Satellite Meeting on High Energy Astrophysics, Tokyo, Japan