{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/spex-high-resolution-spectral-modeling-and","title":"SPEX: High-Resolution Spectral Modeling and Fitting for X-ray Astronomy","arxiv_id":"1912.07897","date":"2019-12-17","proceeding":null,"authors":["Jelle de Plaa","Jelle S. Kaastra","Liyi Gu","Junjie Mao","Ton Raassen"],"abstract":"We present the SPEX software package for modeling and fitting X-ray spectra. Our group has developed spectral models, atomic data and code for X-ray applications since the 1970's. Since the 1990's these are further developed in the public SPEX package. In the last decades, X-ray spectroscopy has been revolutionized by the high-resolution grating spectrometers aboard XMM-Newton and Chandra. Currently, new high-resolution detectors aboard the Hitomi mission, and future missions, like XRISM and Athena, will provide another major step forward in spectral resolution. This poses challenges for us to increase the atomic database substantially, while keeping model calculation times short. In this paper, we summarize our efforts to prepare the SPEX package for the next generation of X-ray observatories.","url_abs":"https://arxiv.org/abs/1912.07897v1","url_pdf":"https://arxiv.org/pdf/1912.07897v1.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"spex-high-resolution-spectral-modeling-and","repo_url":"https://github.com/spex-xray/pyspextools","is_official":0,"mentioned_in_paper":1,"mentioned_in_github":0,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}