Shu Zhang (on behalf of the HXMT team) Institute of High Energy Physics, Chinese Academy of Science The current status of HXMT and its calibrations

News of the mission & Progress of payload Calibrations in Panter Calibration facilities Outline

Satellite Facts: Weight: ~2800 kg Orbit: 550 km, 43° Attitude: 3-Axis Stabilized precision 0.1 ° Lifetime: 4 years Observation modes: Scan and pointing HXMT collaboration Institute of High Energy Physics (PI institute, payloads, scientific operation) Chinese Academy of Space Technology (satellite platform) National Space Science Center, CAS (space environment monitor, mission operation) Tsinghua University (participation in payloads and scientific operation)

HE: NaI/CsI, keV, 5000 cm 2 Size ： 1900×1650×1000 mm ME:Si-PIN,5-30 keV, 952 cm 2 LE:SCD,1-15 keV, 384 cm 2 Star tracker

12/ / We are here. News of the mission & progress of payload Launch date: end of 2015

The mechanical model of the satellite in dynamical environment tests The electric model of HXMT’s payloads in testing. The payloads before the vacuum thermal balance tests Progress of the payload 6/23

The electric fitting of the qualification model. Progress of payload

2013 July 29- August 21, ME&LE : Energy response, QE and their T dependences LE: PSF measurement, QE, linearity Panter calibration

We calibrated the energy linearity, energy resolution, quantum efficiency of one Si-PIN detector in PANTER X-Ray Test- Facility from July 29 to August 21, 2013.

Monochromatic spectra of ME detector at -17 ℃.

The peaks of the spectra varied with different temperature.

Left is the energy linearity of ME detector at -6 ℃. Right is the slope of energy linearity in different temperature.

The energy resolutions varied with different temperature.

Quantum efficiency of ME detector at different temperature

Facility for HE We have successfully finished (in 2013) a calibration facility for HE togather with China National Institute of Metrology. ( keV ） X-ray machine Double crystal monochromator Background shielding box for the calibrated detector Monoenergy peaks Mono-energy fraction >90% Monochromaticity <1%

Instrument Calibration We are building on IHEP campus the calibration facility for ME and LE. It will be finished in middle （ 1-30 keV ） Vacuum charmber X tube DCM Vacuum tube

See details of calibration issues in the later talk, which will be handled in SGS the background, the calibration dataset and software. Thank you for your attention! 4. Summary

Backup materials

DetectorsLE: SCD, 384 cm 2 ;ME : Si-PIN, 950 cm 2 HE : NaI/CsI, 5000 cm 2 Energy RangeLE: 1-15 keV;ME: 5-30 keV;HE: keV Time ResolutionHE: 25μs; ME: 180μs;LE: 1ms Working Temperature HE: 18±1 ℃ ; ME: -50~-20 ℃ ; LE: ℃ Energy ResolutionLE: 6 keV ME: 17.8 keV HE: 60 keV Field of View of one module LE: 6°×1.6°; 6°×4°; 60°×3°; blind; ME: 4°×1°; 4°×4°; blind; HE: 5.7°×1.1°; 5.7°×5.7° ； blind Source Location<1' (20σ source) Characteristics of the HXMT Mission

prototype for observation program draw up HXMT mission movement trajectory Observation visibility study Monitoring of payload working status The detailed design of the scientific ground segments and the software requirements have been finished. We are writing the codes of the softwares, which will be finished in the first season of the next year. Observation Schedule 3. Project status and schedule

OrbitAltitude: ~550 km ; Inclination: ~43° AttitudeThree-axis stabilized Control precision: ±0.1° Measurement accuracy: ±0.01° Data RateLE: 3 Mbps; ME: 3 Mbps; HE: 300 kbps Payload Mass~1000 kg Nominal Lifetime4 years Working ModeScan survey, small region scan, pointed observation

Total background of HE varying with time Different background components of HE Background components of ME Background components of LE Simulation of the in-orbit background of HXMT

Test the performance of the automatic gain control by changing the angle between the main detector and the geomagnetic field. With out the gain control ， the amplitude variation of the same energy incident photons can reach 10.6% ， and it decreased to 0.243% using the AGC, the effect on the energy resolution is as small as 1.31% 。 Automatic Gain Control

The sensitivities of the three telescopes of HXMT. The sensitivities of NuSTAR, INTEGRAL/IBIS and RXTE/HEXTE were reprinted from Koglin et al. (2005) Introduction to the payloads HXMT/LE HXMT/ME HXMT/HE NuSTAR INTEGRAL/IBIS RXTE/HEXTE

25 2. Introduction to the payloads HXMTRXTEINTEGRAL/IBISSWIFTNuSTAR Energy Band (keV) LE: ME: 5-30 HE: PCA: 2-60 HEXTE: XRT: BAT: Detection Area (cm 2 ) LE: 384 ME: 950 HE: 5000 PCA: 6000 HEXTE: XRT: 110 BAT: keV 78 keV Energy Resolution (eV) 6 keV 20 keV keV keV keV 60 keV 60 keV Time Resolution (ms) LE: 1 ME: 0.18 HE: PCA: HEXTE: XRT: 0.14, 2.2,2500 BAT: Sensitivity 3σ ， 10 5 s, mCrab) 20 keV Comparison between HXMT and other major hard X-ray telescopes