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mollcursor

This IDL facility provides a point-and-click interface for finding the astronomical location, value and pixel index of the pixels nearest to the pointed position on a Mollweide projection of a HEALPix map.

FORMAT

IDL> MOLLCURSOR, [cursor_type=, file_out=]

QUALIFIERS

cursor_type=

cursor type to be used
default:34

file_out=

file containing on output the list of point selected with the cursor.
If set to 1, the file will take its default name: 'cursor_catalog.txt'.
If set to a non-empty character string, the file name will be that string

mollcursor should be run immediately following mollview. It gives the longitude, latitude, map value and pixel number corresponding to the cursor position in the window containing the map generated by mollview. Mouse buttons are used to select the function :

left button = display the information relative to the current cursor position,

middle button = print out this information in the IDL command window

right button = quit mollcursor

Note on Mac OS X, X11 and IDL cursor: on some versions¹of Mac OS X , in particular Tiger (ie, 10.4.*) and Leopard (ie, 10.5.*), the IDL function cursor, and therefore HEALPix mollcursor, gnomcursor, will not work properly under X11. To solve this problem, type
under Tiger (10.4):
defaults write com.apple.x11 wm_click_through -bool true
or, under Leopard (10.5):
defaults write org.x.x11 wm_click_through -bool true
at your X11 prompt and restart X11 (tips found respectively at http://marc.sauvage.free.fr/SApMUG/Xnotes.html and https://sympa.obspm.fr/wws/arc/micros-mac/2008-06/msg00001.html). To make the patch permanent, add the line above into your .bashrc (or .cshrc, depending on your shell) file, and restart X11.
And finally, mollcursor obviously requires the '3 button mouse' to be enabled, which can be done in the X11 Preferences menu.

idl

version 6.1 or more is necessary to run mollcursor

ghostview

ghostview or a similar facility is required to view the Postscript image generated by mollcursor.

xv

xv or a similar facility is required to view the GIF/PNG image generated by mollcursor(a browser can also be used).

synfast

This HEALPix facility will generate the FITS format sky map to be input to mollcursor.

cartview

IDL facility to generate a Cartesian projection of a HEALPix map.

cartcursor

interactive cursor to be used with cartview

gnomview

IDL facility to generate a gnomonic projection of a HEALPix map.

gnomcursor

interactive cursor to be used with gnomview

mollview

IDL facility to generate a Mollweide projection of a HEALPix map.

mollcursor

interactive cursor to be used with mollview

orthview

IDL facility to generate an orthographic projection of a HEALPix map.

orthcursor

interactive cursor to be used with orthview

After mollview reads in a map and generates its mollweide projection, mollcursor is run to know the position and flux of bright synchrotron sources, for example.

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Previous: median_filter Up: Healpix/IDL subroutines Next: mollview Top: Main Page

Eric Hivon 2010-06-18