Polarimetric sensitivity of CZTI in terms of MDP (left) as a function of source intensity for exposure time of 1 Ms. The dashed and solid lines represent the polarization angle aligned with the pixel edges and at 45°, respectively with the latter more sensitive owing to a higher modulation factor, as expected. Different colors represent subsamples of CZTI detector plane as shown in the inset. The black line represents the overall MDP as mentioned in the text corresponding to average 22.5° polarization and the third (green) subarray. Right: detection significance of polarization measurement for highly polarized bright sources. The bottom three lines correspond to 500 mCrab sources with polarization fraction of 20% (black), 40% (green), and 60% (pink), respectively. The top line (dashed red) corresponds to one Crab source that has a polarization fraction of 50%.