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

Dipankar

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

Varun

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.