# Understanding the OGIP format

**URL:** <https://community.openastronomy.org/t/understanding-the-ogip-format/1380>\
**Category:** Discourse Discussion\
**Tags:** question\
**Created:** [March 13, 2026, 8:17pm UTC](https://community.openastronomy.org/t/understanding-the-ogip-format/1380 "2026-03-13T20:17:15Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![arnvptl](https://dub1.discourse-cdn.com/flex005/user_avatar/community.openastronomy.org/arnvptl/32/743_2.png) [@arnvptl](https://community.openastronomy.org/u/arnvptl)\
**Post date:** [March 13, 2026, 8:17pm UTC](https://community.openastronomy.org/t/understanding-the-ogip-format/1380/1 "2026-03-13T20:17:15Z")

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I’ve started setting up Julia and will try the Quick Start demo in the Spectra.jl documentation to understand how the package handles spectral data.  
Since the project will begin with integrating the X-ray OGIP loader from SpectralFitting.jl into Spectra.jl, would you recommend first studying the current spectral type structures in Spectra.jl, or focusing on understanding the OGIP format and the existing implementation in SpectralFitting.jl?