GRB 200716C: Evidence for a Short Burst Being Lensed

A tiny fraction of observed gamma-ray bursts (GRBs) may be lensed. The time delays induced by the gravitational lensing are milliseconds to seconds if point lenses intermediate-mass black holes. prompt emission lensed GRBs, in principle, should have repeated pulses with identical light curves and spectra but different fluxes slightly offset positions. In this work, we search for such candidates within GRBs detected Fermi/GBM, Swift/BAT, HXMT/HE report identification an attractive event GRB 200716C that consists two pulses. Both autocorrelation analysis Bayesian inference curve favor scenario. Moreover, spectral properties rather similar follow so-called Amati relation short than long duration bursts. measured flux ratios between nearly constant all channels, as expected from lensing. We therefore suggest burst was a being redshifted mass lens estimated $4.25^{+2.46}_{-1.36}$ $\times$ $10^5$ $M_{\odot}$ (90$\%$ credibility). If correct, could towards existence hole along line sight 200716C.