@inproceedings{Ogawa:2019eB, author = "Ogawa, Satoru and Sasaki, Makoto and Aoki, Toshifumi and Oshima, Hitoshi and Nagasawa, Rikuto", title = "{Observation of Optical Transients and Search for PeV-EeV Tau Neutrinos with Ashra-1}", doi = "10.22323/1.358.0970", booktitle = "Proceedings of 36th International Cosmic Ray Conference {\textemdash} PoS(ICRC2019)", year = 2019, volume = "358", pages = "970" }