We have searched for optical variability in the host galaxy of the radio variable source which is possibly associated with fast radio burst (FRB) 150418. We compare images of the galaxy taken 1 day after the burst using Subaru/Suprime-Cam with images taken ∼ 1 year after the burst using Gemini-South/GMOS. No optical variability is found between the two epochs with a limiting absolute magnitude ≳−19 (AB). This limit applies to optical variability of the putative active galactic nucleus in the galaxy on a timescale of ∼ 1 year, and also to the luminosity of an optical counterpart of FRB~150418 one day after the burst should it have occurred in this galaxy.
@article{arxiv.1806.00562,
title = {A search for optical transients associated with Fast Radio Burst 150418},
author = {Yuu Niino and Nozomu Tominaga and Tomonori Totani and Tomoki Morokuma and Evan Keane and Andrea Possenti and Hajime Sugai and Shotaro Yamasaki},
journal= {arXiv preprint arXiv:1806.00562},
year = {2018}
}
Comments
5 pages, 3 figures, 1 Table, accepted for publication in PASJ Letters