HEALPix

HEALPix (Hierarchical Equal Area isoLatitude Pixelization) is a software for pixelization, hierarchical indexation, synthesis, analysis, and visualization of data on the sphere of a sphere.

As suggested in the name, this pixelization produces a subdivision of a spherical surface in which each pixel covers the same surface area as every other pixel.

What is new in this release:

• Bug corrections and Improvements:
• General:
• libsharp C library used for Spherical Harmonics Transforms in Fortran and C++ since HEALPix 3.10 can now be compiled with any gcc version.
• C++:
• See General section above
• Fortran 90 facilities and subroutines:
• bug correction in query_disc routine in inclusive mode
• bug correction in alm2map_spin routine, which had its spin value set to 2
• See General section above
• IDL:
• ang2pix_ring and pix2ang_nest routines now accept scalar arguments

What is new in version 2.11:

• general:
• installation...
• Fixed IDL installation problem under (ba)sh
• Check consistency of cfitsio library with F90 routines
• introduced command line options for ./configure
• fixed infinite loop in main Makefile's tidy and distclean options
• documentation:
• ``IDL routines'': rightfully says that IDL6.0 or more recent is required
• Makefile no longer assumes that current directory ('.') is in PATH
• C++:
• fixed error affecting equatorial pixels in maps generated by alm2map* Fortran90
• fixed problem with TTYPE* when writing FITS header (was also affecting IDL's isynfast)
• fixed crash causing bug in map2alm_iterative subroutine (was affecting anafast, sky_ng_sims and smoothing facilities)
• fixed un-initialized variables in compute_statistics subroutine
• fixed parameters parsing problem in interactive mode of synfast, anafast, ...
• IDL:
• issues warning when non-integer pixel indexes are fed to nest2ring, ring2nest, pix2ang_*, pix2vec_*, ...
• more stable and elegant behaviour of isynfast and ianafast
• cartview, gnomview, mollview, orthview:
• deal properly with MIN and MAX in ASINH mode
• polarization norm map can be offset ( POLARIZATION=1 mode)
• original color table and plot settings are restored when leaving these routines
• ximview:
• fixed problem with cut-sky FITS files
• color scale bar added to PNG output
• cosmetic editions to remove_dipole