<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Dec 16, 2014, at 11:50 AM, Brian York <<a href="mailto:york@stsci.edu" class="">york@stsci.edu</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">On 2014/12/16 13:59 , "Paul Kuin" <<a href="mailto:npkuin@gmail.com" class="">npkuin@gmail.com</a>> wrote:<br class=""><br class=""><blockquote type="cite" class="">see<br class="">Shupe, D.L., et al., 2005, Astronomical Data Analysis Soft-<br class=""><br class="">ware and Systems XIV ASP Conference Series, Vol. 347, Proceedings of the<br class="">Conference held 24-27 October, 2004 in Pasadena, California, USA. Edited<br class="">by P. Shopbell, M. Britton, and R. Ebert. San Francisco: Astronomical<br class="">Soci- ety of the Pacific, 2005., p.491<br class=""></blockquote><br class="">Thank you. This is definitely a helpful resource. What it does not have is<br class="">any information about modifying an astropy.wcs.WCS object to include these<br class="">coefficients (given that I am building one programmatically). Do you have<br class="">any suggestions on that?<br class=""><br class=""><span class="Apple-tab-span" style="white-space:pre"> </span>-Brian<br class=""></div></blockquote></div><br class=""><div class="">Brian, I have extensive experience in converting polynomials in various formats to WCS and SIP keywords suitable for inclusion in FITS headers. I haven’t worked much yet with the astropy.wcs.WCS class, but it does look like the constructor can take a dictionary of the keywords. I have some conversion functions written in Python and I’d be happy to help you off-list with converting your polynomials.</div><div class=""><br class=""></div><div class="">Regards,</div><div class=""><br class=""></div><div apple-content-edited="true" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">David Shupe</div><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">IPAC/Caltech</div></div></body></html>