TY - JOUR
T1 - An optical search for transients lasting a few seconds
AU - Richmond, Michael W.
AU - Tanaka, Masaomi
AU - Morokuma, Tomoki
AU - Sako, Shigeyuki
AU - Ohsawa, Ryou
AU - Arima, Noriaki
AU - Tominaga, Nozomu
AU - Doi, Mamoru
AU - Aoki, Tsutomu
AU - Arimatsu, Ko
AU - Ichiki, Makoto
AU - Ikeda, Shiro
AU - Ita, Yoshifusa
AU - Kasuga, Toshihiro
AU - Kawabata, Koji S.
AU - Kawakita, Hideyo
AU - Kobayashi, Naoto
AU - Kokubo, Mitsuru
AU - Konishi, Masahiro
AU - Maehara, Hiroyuki
AU - Mito, Hiroyuki
AU - Miyata, Takashi
AU - Mori, Yuki
AU - Morii, Mikio
AU - Motohara, Kentaro
AU - Nakada, Yoshikazu
AU - Okumura, Shin Ichiro
AU - Onozato, Hiroki
AU - Sarugaku, Yuki
AU - Sato, Mikiya
AU - Shigeyama, Toshikazu
AU - Soyano, Takao
AU - Takahashi, Hidenori
AU - Tanikawa, Ataru
AU - Tarusawa, Ken'ichi
AU - Urakawa, Seitaro
AU - Usui, Fumihiko
AU - Watanabe, Junichi
AU - Yamashita, Takuya
AU - Yoshikawa, Makoto
N1 - Funding Information:
This research has made use of NASA’s Astrophysics Data System. We thank the Minor Planet Center for providing the Minor Planet Checker and NEO Checker services to the community. Ned Wright’s cosmological calculator (Wright 2006) was a great aid in our work.Our studies are supported in part by the Japan Society for the Promotion of Science (JSPS) Grants-in-Aid for Scientific Research (KAKENHI) Grant Numbers JP25103502, JP26247074, JP24103001, JP16H02158, JP16H06341, JP2905, 18H04575, JP18H01272, JP18H01261, and JP18K13599. This research is also supported in part by the Japan Science and Technology (JST) Agency’s Precursory Research for Embryonic Science and Technology (PRESTO), the Research Center for the Early Universe (RESCEU), of the School of Science at the University of Tokyo, and the Optical and Near-infrared Astronomy InterUniversity Cooperation Program.
PY - 2020/2/1
Y1 - 2020/2/1
N2 - Using a prototype of the Tomo-e Gozen wide-field CMOS mosaic camera, we acquire wide-field optical images at a cadence of 2\:Hz and search them for transient sources of duration 1.5 to 11.5\:s. Over the course of eight nights, our survey encompasses the equivalent of roughly two days on one square degree, to a fluence equivalent to a limiting magnitude of about V = 15.6 in a 1-s exposure. After examining by-eye the candidates identified by a software pipeline, we find no sources which meet all our criteria. We compute upper limits to the rate of optical transients consistent with our survey, and compare those to the rates expected and observed for representative sources of ephemeral optical light.
AB - Using a prototype of the Tomo-e Gozen wide-field CMOS mosaic camera, we acquire wide-field optical images at a cadence of 2\:Hz and search them for transient sources of duration 1.5 to 11.5\:s. Over the course of eight nights, our survey encompasses the equivalent of roughly two days on one square degree, to a fluence equivalent to a limiting magnitude of about V = 15.6 in a 1-s exposure. After examining by-eye the candidates identified by a software pipeline, we find no sources which meet all our criteria. We compute upper limits to the rate of optical transients consistent with our survey, and compare those to the rates expected and observed for representative sources of ephemeral optical light.
KW - methods: observational
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U2 - 10.1093/pasj/psz120
DO - 10.1093/pasj/psz120
M3 - Article
AN - SCOPUS:85082554948
VL - 72
JO - Publications of the Astronomical Society of Japan
JF - Publications of the Astronomical Society of Japan
SN - 0004-6264
IS - 1
M1 - 3
ER -