Download - The Scientific Goals for Astronomical Satellite National Astronomical Observatory, CAS, China
The Scientific Goals The Scientific Goals for Astronomical for Astronomical
SatelliteSatellite
National Astronomical Observatory,
CAS, 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, 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
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,
……
Optical photometric telescope
Wide-field optical telescope
Wide-field X-ray telescopes
Optical patrol telescope
The optical axies of the four telescopes are
parallel in the normal case.
The Payload of SVOM
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
• 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
Optical Photometric telescope:
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
17:25:28
f=250mm ,D=160mm Scale: 0.77 LVU 07-Apr-05
32.47 MM
17:26:53
0.000,0.000 DG 0.00, 0.00
0.000,0.500 DG 0.00, 0.24
0.000,0.700 DG 0.00, 0.33
0.000,1.400 DG 0.00, 0.67
0.000,2.100 DG 0.00, 1.00
FIELDPOSITION
DEFOCUSING 0.00000
f=250mm ,D=160mm
.874E-01 MM
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
Optical patrol telescope
40mm lens, f/1.0• E2V 47-20 1024 1024 frame-transfer CCD• FOV: ~20 20 degree2
• Integrating time: 1minm=15m, ±0.04
Star sensor and wide-field monitor
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.