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ASTROSAT Prospects for a Hard X-ray Survey

ASTROSAT Overview LAXPC Details Science Prospects Hard X-ray Survey Prospects Beyond ASTROSAT Biswajit Paul Raman Research Institute, Bangalore. ASTROSAT Prospects for a Hard X-ray Survey. ASTROSAT. IXAE. EXOSAT-ME : 1983-1986 1.5-15 keV , 1800 sq cm With LE Imaging Telescopes (CMA)

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ASTROSAT Prospects for a Hard X-ray Survey

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  1. ASTROSAT Overview LAXPC Details Science Prospects Hard X-ray Survey Prospects Beyond ASTROSAT Biswajit Paul Raman Research Institute, Bangalore ASTROSATProspects for a Hard X-ray Survey

  2. ASTROSAT

  3. IXAE

  4. EXOSAT-ME : 1983-1986 1.5-15 keV, 1800 sq cm With LE Imaging Telescopes (CMA) GINGA-LAC: 1987-1991 2-37 keV, 4000 sq cm With All Sky Monitor RXTE-PCA: 1996-201? 2-30 keV, 6000 sq cm With All Sky Monitor and Hard X-ray Instrument ASTROSAT-LAXPC: 2-80 keV, 6000 sq cm With All Sky Monitor, Soft/Hard X-ray Instruments, UVIT Large Area X-ray Astronomical Observatories USA Exp,2000 sq cm IXAE, 1200 sq cm

  5. LAXPC Characteristics Area : 6,000 - 7,500 cm2 Mass: 390 kg Time Resolution: 10 µs, dead time 10-35 µs Absolute Timing Accuracy: 10 µs Front-end and Processing Electronics: separate electronics for each detector Data Storage: Onboard Memory 570 MB per Orbit Detection Efficiency: 90-100 % upto 20 keV, ~40% upto 80 keV Energy Resolution: 12-13% at 20-60 keV Life Time: 3-10 Years, no Consumable

  6. LAXPC: Effective Area

  7. LAXPC: Complex Energy Response • Energy response generation: Monte Carlo simulation / Ground calibration

  8. LAXPC: Energy resolution

  9. Spectral Leakage in PCA and LAXPC LAXPC PCA

  10. Spectral Leakage in PCA

  11. LAXPC Schematic

  12. LAXPC: Complex Energy Response PCA: Energy resolution of single events and escape events

  13. ASTROSAT Ground Trace

  14. LAXPC Advantages Large effective area in hard X-ray band Stable background Low Spectral leakage Wide energy band 2-80 keV with LAXPC 0.3-8 keV with SXT 10-150 keV with CZT Simultaneous, sensitive, multi-band UV/Optical observations Only timing instrument it this time frame

  15. CRSF with ASTROSAT LAXPCs

  16. Hard X-ray QPOs

  17. Long term intensity variations in Cen X-3

  18. Long term intensity variations and the orbital modulation Raichur & Paul 2008

  19. Cen X-3: Precessing Warped Accretion Disk ?? Raichur & Paul 2008

  20. Cen X-3: Precessing Warped Accretion Disk ?? Raichur & Paul 2008

  21. Cen X-3: Intensity dependence of the pulsed fraction Raichur & Paul 2008

  22. Long term intensity variations in Cen X-3and the quasi-periodic oscillations Harhsa et al. 2008

  23. Long term intensity variations in Cen X-3and the quasi-periodic oscillations Raichur & Paul 2008

  24. Hard X-ray Survey Explore the 10-60 keV band Period ic Scan Galactic plane + SMC region Extragalactic Survey 100 x 100 degree Survey with Slew Data Example: RXTE-PCA

  25. Survey with Slew Data

  26. Survey with Slew Data

  27. X-ray Polarimeter

  28. POLIX: Sensitivity MDP(n) =(n/S) (2(S+B)/T) 1/2 GEMS

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