.. Licensed under a 3-clause BSD style license - see LICENSE.rst

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References
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This page collects useful references associated to data formatting.

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FITS standards
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- FITS standard Document, version 4.0 (2018): `pdf <https://fits.gsfc.nasa.gov/standard40/fits_standard40aa-le.pdf>`__ and `html <https://fits.gsfc.nasa.gov/fits_standard.html>`__
- Paper I: `Representations of World Coordinates in FITS <https://www.aanda.org/articles/aa/pdf/2002/45/aah3859.pdf>`__, Greisen, E. W., and Calabretta, M. R., Astronomy & Astrophysics, 395, 1061-1075, 2002
- Paper II: `Representations of celestial coordinates in FITS <https://www.aanda.org/articles/aa/pdf/2002/45/aah3860.pdf>`__, Calabretta, M. R., and Greisen, E. W., Astronomy & Astrophysics, 395, 1077-1122, 2002.
- Paper III: `Representations of spectral coordinates in FITS <https://www.aanda.org/articles/aa/pdf/2006/05/aa3818-05.pdf>`__, Greisen, E. W., Calabretta, M. R., Valdes, F. G., and Allen, S. L., Astronomy & Astrophysics, 446, 747-771, 2006.
- `Mapping on the HEALPix grid <https://ui.adsabs.harvard.edu/abs/2007MNRAS.381..865C/abstract>`__, Calabretta, Mark R. and Roukema, Boudewijn F., Monthly Notices of the Royal Astronomical Society, Volume 381, Issue 2, pp. 865-872. October 2007

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OGIP
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- FITS Rate File, 2014: `html <https://heasarc.gsfc.nasa.gov/docs/heasarc/ofwg/docs/rates/ogip_93_003/ogip_93_003.html>`__
- Calibration files: see references on this `page <https://heasarc.gsfc.nasa.gov/docs/heasarc/caldb/caldb_doc.html>`__
- Spectral File Format (PHA): `html <https://heasarc.gsfc.nasa.gov/docs/heasarc/ofwg/docs/spectra/ogip_92_007/node5.html>`__
- Effective Area: `pdf <https://heasarc.gsfc.nasa.gov/docs/heasarc/caldb/docs/memos/cal_gen_92_019/cal_gen_92_019.pdf>`__
- 2D-PSF File format: `pdf <https://heasarc.gsfc.nasa.gov/docs/heasarc/caldb/docs/memos/cal_gen_92_027/cal_gen_92_027.pdf>`__

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Web sites
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- `Home page for FITS Support Office <https://fits.gsfc.nasa.gov/>`__ (https://fits.gsfc.nasa.gov/)
- `HEASARC FITS Working Group <https://heasarc.gsfc.nasa.gov/docs/heasarc/ofwg/ofwg_intro.html>`__, also known as the OGIP (Office of Guest Investigator Programs) FITS working group
- Gamma Astro Data Format: `html <https://gamma-astro-data-formats.readthedocs.io/>`__