{"id":18427169,"url":"https://github.com/fjebaker/gradus-paper","last_synced_at":"2026-03-19T04:19:54.372Z","repository":{"id":124945338,"uuid":"599692727","full_name":"fjebaker/gradus-paper","owner":"fjebaker","description":"LaTeX and Julia source for the Gradus.jl paper.","archived":false,"fork":false,"pushed_at":"2025-02-21T12:31:20.000Z","size":13610,"stargazers_count":1,"open_issues_count":2,"forks_count":0,"subscribers_count":2,"default_branch":"main","last_synced_at":"2025-04-05T01:06:58.508Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":"","language":"TeX","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"gpl-3.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/fjebaker.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2023-02-09T17:22:14.000Z","updated_at":"2025-02-21T09:59:14.000Z","dependencies_parsed_at":"2024-04-23T21:23:54.713Z","dependency_job_id":"b9a6ef26-a931-4687-8ba4-23da1afa92bc","html_url":"https://github.com/fjebaker/gradus-paper","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/fjebaker%2Fgradus-paper","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/fjebaker%2Fgradus-paper/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/fjebaker%2Fgradus-paper/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/fjebaker%2Fgradus-paper/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/fjebaker","download_url":"https://codeload.github.com/fjebaker/gradus-paper/tar.gz/refs/heads/main","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":248769473,"owners_count":21158818,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-11-06T05:09:50.326Z","updated_at":"2026-01-23T11:48:18.498Z","avatar_url":"https://github.com/fjebaker.png","language":"TeX","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Gradus.jl: spacetime-agnostic general relativistic ray-tracing for X-ray spectral modelling\n\nWe introduce Gradus.jl, an open-source and publicly available general\nrelativistic ray-tracing toolkit for spectral modelling in arbitrary\nspacetimes. Our software is written in the Julia programming language, making\nuse of forward-mode automatic differentiation for computing the Christoffel\nsymbols during geodesic integration, and for propagating derivatives through\nthe entire ray-tracer. Relevant numerical methods are detailed, and our models\nare validated using a number of tests and comparisons to other codes. The\ndifferentiability is used to optimally calculate Cunningham transfer functions\n-- used to efficiently pre-compute relativistic effects in spectral models. A\nmethod is described for calculating such transfer functions for disc with\nnon-zero vertical height, including the treatment of self-obscuration. An\nextension of the transfer function formalism that includes timing information\nis described, and used to calculate high-resolution reverberation lag spectra\nfor a lamppost corona. The lag-frequency and lag-energy spectra for a\nShakura-Sunyaev accretion disc with various lamppost heights and Eddington\nratios are calculated, and the general impact of disc thickness in reflection\nmodels is discussed.\n\n## Building the paper\n\n    make\n\nTo build the diffs from before the reviewer comments\n\n\n    make diff\n\nTo bundle for distribution and final submission\n\n\n    make bundle\n\n## $\\LaTeX$ document\n\nThis uses the [MNRAS style files](https://www.ctan.org/tex-archive/macros/latex/contrib/mnras). Further\ninformation about preparing MNRAS papers in $\\LaTeX$ can be found in the\n[Instructions to Authors](https://academic.oup.com/mnras/pages/general_instructions).\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ffjebaker%2Fgradus-paper","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Ffjebaker%2Fgradus-paper","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ffjebaker%2Fgradus-paper/lists"}