We developed a Python package GEHONG to mock the three-dimensional spectral data cube under the observation of an ideal telescope for the Integral Field Spectrograph of the Chinese Space Station Telescope (CSST-IFS). This package can generate one-dimensional spectra corresponding to local physical properties at specific positions according to a series of two-dimensional distributions of physical parameters of target sources. In this way, it can produce a spatially resolved spectral cube of the target source. Two-dimensional distributions of physical parameters, including surface brightness, stellar population, and line-of-sight velocity, can be modeled using the parametric model or based on real observational data and numerical simulation data. For the generation of one-dimensional spectra, we have considered four types of spectra, including the stellar continuum spectra, ionized gas emission lines, AGN spectra, and stellar spectra. That makes GEHONG able to mock various types of targets, including galaxies, AGNs, star clusters, and HII regions.
@article{arxiv.2511.06927,
title = {Mock Observations for the CSST Mission: Integral Field Spectrograph--GEHONG: A Package for Generating Ideal Datacubes},
author = {Shuai Feng and Shiyin Shen and Wei Chen and Zhaojun Yan and Renhao Ye and Jianjun Chen and Xuejie Dai and Junqiang Ge and Lei Hao and Ran Li and Yu Liang and Lin Lin and Fengshan Liu and Jiafeng Lu and Zhengyi Shao and Maochun Wu and Yifei Xiong and Chun Xu and Yang Yang and Jun Yin},
journal= {arXiv preprint arXiv:2511.06927},
year = {2026}
}