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The Scientific Goals for Astronomical Satellite

The Scientific Goals for Astronomical Satellite. National Astronomical Observatory, C AS, China. History of the proposal. 2000.6: Space-based Variable objects Monitor (SVOM) proposed by NAOC Got support from CAS 2002.7: Reviewed by committee,

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The Scientific Goals for Astronomical Satellite

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  1. The Scientific Goals for Astronomical Satellite National Astronomical Observatory, CAS, China

  2. History of the proposal • 2000.6: Space-based Variable objects Monitor (SVOM) proposed by NAOC Got support from CAS • 2002.7: Reviewed by committee, One of the most promising micro-satellite proposal • 2003-2005: Funded by NSFC for pre-phase A • 2003: Connected with COROT and MONS • 2004: Proposed as a candidate proposal for Sino-France cooperation

  3. Similar astronomical satellites • MOST ( Canada) • COROT (France) • SWIFT (USA)

  4. MOST

  5. Scientific Goals • Stellar seismology ( as MOST,COROT) • Searching for Exoplanet (as COROT) • Monitoring GRB after-glows (as SWIFT) • Studying XRF( high-z GRB?) • X-ray/Optical simultaneously observations: AGNe, X-binary, CVs, Solar-like activities, ……

  6. The Payload of SVOM Optical photometric telescope Wide-field optical telescope Wide-field X-ray telescopes Optical patrol telescopeThe optical axies of the four telescopes are parallel in the normal case.

  7. Optical Photometric telescope: • Diameter: 30cm, f/7 • E2V 47-20 1024*1024 frame-transfer CCD • FOV: ~22*22acrmin • 4000-8500 Å • Integrating time: 1 min R=15.0m; ±0.01

  8. Optical Photometric telescope: • Using a quarter of FOV with an array of micro-lens as Fabry lens to avoid CCD saturation during observing bright stars and decrease the effect of un-uniformity of CCD’s response. • Integrating time: 1min m=10m, ±0.0005 5m, ±0.00005 For seismology and high accurate photometry

  9. Frame-transfer CCD Marconi 47-20

  10. Wild-field Photometric telescope: • Diameter: 16cm, f/1.56 • E2V 47-20 • FOV: 3*3 degrees • 4000-8500 Å • Integrating time: 1 min R=15.0m; ±0.02 For Exoplanet searching

  11. Wide-field X-ray telescopes: • Soft X-ray telescope: • Spectral resolution: 150-300 eV • Accuracy of position: 2-5 arcmin. • Range of energy: 0.5-20 keV • Field of View: 20 degrees • Hard X-ray telescope: • Range of energy: 20-300 keV • Field of View: 20 degrees

  12. Optical patrol telescope • 40mm lens, f/1.0 • E2V 47-20 1024 1024 frame-transfer CCD • FOV: ~20 20 degree2 • Integrating time: 1min m=15m, ±0.04 Star sensor and wide-field monitor

  13. Operating modes • Normal mode: Seismology X-ray/optical monitoring • X-ray trigger mode: The optical photometric telescope points to the place of X-ray source. (2~3 times per year) The wide-field optical telescope is always for exoplanets.

  14. Thanks!

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