Possible correlations between the emission properties of short GRBs and their offsets from the host galaxies

Shuai Zhang, Zhi-Ping Jin, Fu-Wen Zhang, Xiang Li, Yi-Zhong Fan, Da-Ming Wei

Published 2017-06-21Version 1

Short Gamma-Ray Bursts(SGRBs) are widely believed to be from mergers of binary compact objects involving at least one neutron star and hence have a broad range of spatial offsets from their host galaxies. In this work we search for possible correlations between the emission properties of 18 SGRBs and their offsets from the host galaxies. The SGRBs with and without extended emission do not show significant difference between their offset distribution, in agreement with some previous works. There are however possible correlations between the optical and X-ray afterglow emission and the offsets. The underlying physical origins are examined.