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We present a detailed analysis of short GRB 201221D lying at redshift $z=1.045$. We analyse the high-energy data of the burst and compare it with thesample of short gamma-ray bursts (SGRBs). The prompt emission characteristicsare typical of those seen in the case of other SGRBs except for the peak energy($E_{\rm p}$), which lies at the softer end (generally observed in the case oflong bursts). We estimate the host galaxy properties by utilising the {\scPython}-based software {\sc Prospector} to fit the spectral energy distributionof the host. The burst lies at a high redshift relative to the SGRB sample witha median redshift of $z=0.47$. We compare the burst characteristics with otherSGRBs with known redshifts along with GRB 200826A (SGRB originated from acollapsar). A careful examination of the characteristics of SGRBs at differentredshifts reveals that some of the SGRBs lying at high redshifts haveproperties similar to long GRBs indicating they might have originated fromcollapsars. Further study of these GRBs can help to explore the broad pictureof progenitor systems of SGRBs.

Multi-wavelength analysis of short GRB 201221D and its comparison with other high \& low redshift short GRBs