2011-11-25
Resource: PyAST
Description: Starlink AST wrapper for Python
Homepage URL: dsberry.github.com/starlink/pyast.html
PyAST provides wrappers for the starlink AST library. AST provides a comprehensive range of facilities for attaching world co-ordinate systems to astronomical data, for retrieving and interpreting that information in a variety of formats, including FITS-WCS, and for generating graphical output based on it (annotated coordinate grids, etc). AST provides the WCS facilities for ...
2011-09-06
Tutorial: WCS tutorial using Kapteyn
The Kapteyn package provides a very nice tutorial aimed at beginners that introduces the basics of WCS (world coordinate system) transformations. The examples use the Kapteyn wcs module, but many of the concepts discussed are independent of the specific software.
http://www.astro.rug.nl/software/kapteyn/wcstutorial.html
2011-06-29
Resource: pysofa
Description: Standards of Fundamental Astronomy interface
Homepage URL: http://pypi.python.org/pypi/pysofa
Pysofa provides a Python interface to the the IAU-sanctioned Standards of Fundamental Astronomy (SOFA) library. SOFA is a set of algorithms and procedures that implement standard models used in fundamental astronomy, covering:
- Calendars
- Time Scales
- Earth rotation and sidereal time
- Ephemerides (medium precision)
- Geocentric/geodetic transformations
- Precession, nutation, polar motion
- Star space motion ...
1
2011-06-13
Blog: Quaternion library - looking for feedback
Andrea Zonca writes:
I've developed a quaternion library using numpy with the purpose of manipulating large arrays of quaternions, as typically used for spacecraft pointing (I work on Planck). The code is available at
github.com/zonca/quaternionarray
I would like some feedback, I might add some documentation in the near future, now I've only docstrings.
4
2011-02-04
Blog: [Question] How to convert a HEALPIX image to e.g. CAR projection?
Question from user Christoph:
Does anyone know a command line tool or python module that can convert a HEALPIX FITS image to a projection like e.g. CARtesian or AIToff?
Aladin can convert to / from HEALPIX, but I need something non-GUI. As far as I can tell MONTAGE and SWARP can't handle HEALPIX, is that correct?
