The SiTian project

TL;DR

SiTian is a comprehensive ground-based all-sky optical monitoring network with dozens of telescopes aimed at detecting and studying transient astronomical events and variable objects, providing rapid, multi-band data and follow-up spectroscopy.

Contribution

This project introduces an integrated global network of telescopes designed for rapid detection and monitoring of optical transients, expanding capabilities beyond existing surveys.

Findings

Plans to deploy 72 telescopes by 2030

Capability to scan 10,000 sq deg every 30 min

Includes follow-up spectroscopy with 4-m telescopes

Abstract

SiTian is an ambitious ground-based all-sky optical monitoring project, developed by the Chinese Academy of Sciences. The concept is an integrated network of dozens of 1-m-class telescopes deployed partly in China and partly at various other sites around the world. The main science goals are the detection, identification and monitoring of optical transients (such as gravitational wave events, fast radio bursts, supernovae) on the largely unknown timescales of less than 1 day; SiTian will also provide a treasure trove of data for studies of AGN, quasars, variable stars, planets, asteroids, and microlensing events. To achieve those goals, SiTian will scan at least 10,000 square deg of sky every 30 min, down to a detection limit of $V \approx 21$ mag. The scans will produce simultaneous light-curves in 3 optical bands. In addition, SiTian will include at least three 4-m telescopes specifically allocated for follow-up spectroscopy of the most interesting targets. We plan to complete the installation of 72 telescopes by 2030 and start full scientific operations in 2032.