S19A0051

The transient sky has been intensively explored by various surveys in the last decade. However, transient phenomena with timescales shorter than 1 day are still largely unexplored. The past attempts with PTF, Pan-STARRS1, Dark Energy Survey, and Subaru/HSC have shown the presence of rapid transients, but their nature is still unclear due to difficulty of real-time spectroscopy. We propose to perform Gemini/GMOS ToO observations coordinated with the high-cadence transient survey with a newly developed wide-field CMOS camera for Kiso 1m Schmidt telescope. In this survey, 7000 deg2 sky is continuously monitored with cadences of 1 day, 2 hours, and 0.5 seconds with 19, 18, and 17 mag depth, respectively. We expect to discover about 10 so-called “rapidly evolving luminous transients” in the local Universe every year. In addition, our survey has a potential to discover even shorter timescale transients thanks to the capability of the CMOS sensors. We perform multi-epoch spectroscopy of two best candidates by using rapid and standard ToOs with Gemini/GMOS. We aim at identifying absorption/emission line features in rapid transients and unveiling the nature of such extreme transients.


This document was translated from LATEX by HEVEA.