Mock Observations for the CSST Mission: Integral Field Spectrograph—GEHONG: A Package for Generating Ideal Datacubes postprint

Abstract: We developed a Python package GEHONG to mock the three-dimensional spectral datacube under the observation of an ideal telescope for the Integral Field Spectrograph of the Chinese Space Station Survey Telescope. 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, Active Galactic Nucleus (AGN) spectra, and stellar spectra. That makes GEHONG able to mock various types of targets, including galaxies, AGNs, star clusters, and H II regions.