s="reference internal" href="fits_header.html">4.6. header</a></li>
<li class="toctree-l2"><a class="reference internal" href="fits_pure_header.html">4.7. pure_header</a></li>
<li class="toctree-l2"><a class="reference internal" href="fits_hedit.html">4.8. hedit</a></li>
<li class="toctree-l2"><a class="reference internal" href="fits_add.html">4.9. add</a></li>
<li class="toctree-l2"><a class="reference internal" href="fits_sub.html">4.10. sub</a></li>
<li class="toctree-l2"><a class="reference internal" hr