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The proposed Daksha mission comprises of a pair of highly sensitive spacetelescopes for detecting and characterising high-energy transients such aselectromagnetic counterparts of gravitational wave events and gamma-ray bursts(GRBs). Along with spectral and timing analysis, Daksha can also undertakepolarisation studies of these transients, providing data crucial forunderstanding the source geometry and physical processes governing high-energyemission. Each Daksha satellite will have 340 pixelated Cadmium Zinc Telluride(CZT) detectors arranged in a quasi-hemispherical configuration without anyfield-of-view collimation (open detectors). These CZT detectors are goodpolarimeters in the energy range 100 -- 400 keV, and their ability to measurepolarisation has been successfully demonstrated by the Cadmium Zinc TellurideImager (CZTI) onboard AstroSat. Here we demonstrate the hard X-ray polarisationmeasurement capabilities of Daksha and estimate the polarisation measurementsensitivity (in terms of the Minimum Detectable Polarisation: MDP) usingextensive simulations. We find that Daksha will have MDP of~$30\%$ for afluence threshold of $10^{-4}$ erg cm$^2$ (in 10 -- 1000 keV). We estimate thatwith this sensitivity, if GRBs are highly polarised, Daksha can measure thepolarisation of about five GRBs per year.

Prospects of measuring Gamma-ray Burst Polarisation with the Daksha mission