标题： 索尔查：优化的太阳系星历生成 显示英文标题

标题： Sorcha: Optimized Solar System Ephemeris Generation

摘要： 索尔查（Sorcha）是一款为鲁宾天文台（Vera C. Rubin Observatory）的时域巡天遗产调查（LSST）以及未来的大规模宽视场巡天设计的太阳系巡天模拟器。在十年的巡天过程中，预计LSST将收集大约十亿次对小行星的观测数据。太阳系巡天模拟器的任务是接收一组输入天体（由轨道和物理特性描述），并确定实际或假设的巡天会发现什么。现有的巡天模拟器在确定哪些输入天体位于每个巡天区域时存在计算瓶颈，这使得它们对于LSST的数据规模来说不可行。索尔查能够快速、高效且准确地计算数百万条输入轨道和具有数百万次观测的巡天任务在天空中的位置，并识别这些天体经过哪些曝光，以便软件后续阶段能够详细估算这些输入小天体的视星等和可探测性。本文提供了索尔查历表生成器背后算法和软件的全部细节。像索尔查的许多组件一样，其历表生成器可以轻松用于其他巡天任务。 显示英文摘要

摘要： Sorcha is a solar system survey simulator built for the Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST) and future large-scale wide-field surveys. Over the ten-year survey, the LSST is expected to collect roughly a billion observations of minor planets. The task of a solar system survey simulator is to take a set of input objects (described by orbits and physical properties) and determine what a real or hypothetical survey would have discovered. Existing survey simulators have a computational bottleneck in determining which input objects lie in each survey field, making them infeasible for LSST data scales. Sorcha can swiftly, efficiently, and accurately calculate the on-sky positions for sets of millions of input orbits and surveys with millions of visits, identifying which exposures these objects cross, in order for later stages of the software to make detailed estimates of the apparent magnitude and detectability of those input small bodies. In this paper, we provide the full details of the algorithm and software behind Sorcha's ephemeris generator. Like many of Sorcha's components, its ephemeris generator can be easily used for other surveys.