Gamma-ray Bursts with ASTROSAT
Jan 20, 2016
A R Rao (on behalf of CZTI team)
Tata Institute of Fundamental Research, India(VSSC/ IUCAA/PRL)
Radiator Alpha tag
CAM
Continuous time-tagged individualphoton data (20 micro-sec)
Hard X-raymonitoring(above ~ 80 keV)
CZT-ImagerWeight - 50 kg Size: 60 cm
Area: 1000 cm2 CZT 1000 cm2 Veto10 – 100 keV (upto 600keV)
Low Inclination 6°
Image
Timing
Spectra
Alpha tagged spectrum:Resolution @60 keV : 8%
rms: 0.3μs
Dipankar/Santosh
Mithun
Rakesh
Yadav;Mayukh
Astrosat
Fermi
Swift
Gamma-ray BurstsAstrosat: 650 km; 6° Fermi: 565 km 25°.6 Swift: 600 km20°
Urata+;15
Qin+;12
T90
E_peak
GRB151006A
Vikas/Kutty/Dipankar/Debdutta
Some signals of Polarization inGRB – possible with brighter GRBs.
Vikas
Conclusions
CZT-Imager will complement Swift andGBM data for the prompt emission ofGRBsCan provide high energy spectral data
for Swift GRBs and localization (about adegree) for Fermi GRBs.Sensitive to short GRBs.Can measure polarization of bright GRBs.