The redshift selected sample of long gamma-ray burst host galaxies: the overall metallicity distribution at $z<0.4$

Yuu Niino, Kentaro Aoki, Tetsuya Hashimoto +7

We discuss the host galaxy metallicity distribution of all long gamma-ray bursts (GRBs) whose redshifts are known to be $<0.4$, including newly obtained spectroscopic datasets of…