spydr (1)

Spydr (pronounce spider) can be invoqued from the shell

spydr [ options ] image1.fits [ image2.fits ... ]

where the fits images can contain single images (not necessarily of the same size) or data cube. Widlcards are allowed in names.

or within yorick

#include spydr.i

spydr,im1,im2,cube

spydr,"image1.fits",...

--conffile

configuration file.

--hduvalue

Specify a fits HDU to read

--dpivalue

Yorick dpi value (yorick default = 75, spydr default = 83). Any value between 30 and 150 make sense.

--ittvalue

Intensity Transfer Table (1=linear, 2=sqrt, 3=square, 4=log, 5=hist equalized)

--pixsizevalue

Pixel size (or plate scale) in arcsec.

--boxsizevalue

Size of box for PSF fitting and Strehl calculation (pixels)

--saturationvalue

Value above which pixels have to be considered as saturated (ADU)

--wavelengthvalue

Force wavelength for all images

--zeropointvalue

Photometric zeropoint (magnitude)

--nbinsvalue

Number of bins for histograms

--strehlapervalue

Diameter of circular mask for Strehl calculations (pixels). The flux is integrated in a circle of this diameter, while the sky is estimated from the remaining pixels within the box of size "boxsize"

--batch

Turn on yorick batch mode (yorick quits when encountering an error). This flag is recommended when starting spydr from a non-interactive session (e.g. from a gnome applet).

--debug

Turn on the verbose mode (debugging mode).

--invert

Invert LUT

--fullgui

Show the plugin pane when the GUI is realized

--compact

Hide the lower part of the GUI at startup

Spydr is a GUI for image visualization and simple analysis (cuts, zoom, values, statistics, histogram, sigma filter) with changeable LUT and ITT. Spydr has a couple of plugins to measure FWHM and Strehl. Press "?" on the main display area to get a popup help:

The following shortcuts are available: x/y: Plot line/column under cursor X/Y: Toggle continuous plot of line/column

       under cursor

c: Interactive plot of cut across image h: Plot histogram of visible region r: Radial plot centered on cursor f: Fit 1d gaussian to 1d plot e: Adjust min and max cut to 10% and 99.9%

      of distribution

E: Reset min and max cut to min and max

      of visible region

n/p: Next/prevous image s: Sigma filter displayed image -/+: Decrease/Increase zoom factor in zoom window ?: This help

From the shell: $ spydr --dpi 74 --fullgui 20070730_2*.fits $ spydr --pixsize 0.127 20070730_2[2-3]?.fits 20070730_241.fits

Within yorick: > spydr,"~/ascam/2007jun26/20070625T2000*.fits" > spydr,["20070730_1[1-3].fits","20070730_23.fits"] > spydr,image > spydr,[im1,im2] > spydr,im1,im2

Y_PYTHON

Force the path to spydr.py. The default path is

./:Y_USER:Y_USER/python/:Y_SITES/python/:Y_SITE/python/

Y_GLADE

Force the path to spydr.glade. The default path is

./:Y_USER:Y_USER/glade/:Y_SITES/glade/:Y_SITE/glade/

Y_CONF

Force the path to spydr.conf. The default path is

./:Y_USER:Y_SITE:/etc/:

./share/:Y_USER/share/:Y_SITE/share/:

./share/spydr/:Y_USER/share/spydr/:Y_SITE/share/spydr/

- only fits images handled to date - the ITT display is not very well handled

Francois Rigaut, Gemini Observatory

Input files:

spydr.conf

The spydr configuration file. Needed. It should have come with your installation. The routine which_spydrconf() returns the path to the used spydr.conf. The following directories are searched for spydr.conf, in this order: Y_USER, Y_SITE, /etc, Y_USER/share, Y_SITE/share, Y_USER/share/spydr, Y_SITE/share/spydr. If you wish to modify the defaults, copy the file over to Y_USER and modify at will.

Output files: none.

yorick(1), yao(1)