FAZZ, a FITS image/cube
browsing and analyzing tool in IDL
Norio Ikeda (Institute of Space and Astronautical Science/Japan Aerospace Exploration Agency),
Atsushi Yoshida, Hidefumi Tatei (Tokyo Institute of Technology),
Sachiko Onodera (Nobeyama Radio Observatory), Rieko Momose(Tokyo Univ./ALMA),
Yoshimi Kitamura (ISAS/JAXA)

Abstract

FAZZ has been developed as a tool set for visualizing and analyzing 2-D image/3-D cube FITS file.
Main features of the software are listed as follows;1) Visualization tools for 3-D (2 spatial and 1 spectroscopic) cube image are well-developed.
2) Quality of images and plots are high enough to be used for publication.
3) User-friendly GUI and text-base commands for automated processing are both implemented.
4) Source codes for the licensed IDL and package for the IDL Virtual Machine are freely available at

http://hibari.isas.jaxa.jp/nikeda/fazz/fazz.html.

1) Visualization tools for 3-D cube FITS
Spectral line profile Integrated Intensity
map
Cursor on the velocity axis
can feed back the velocity
information to the integrated
intensity map.

First/Secondmoment map

3) Smart operating ways
● All the modules and plots have its own GUI panel.

Velocity
channel mapsExample）GUI panel for 2-D image visualization

Arithmetic calculation (inverse,polynomial, logarithm, convolution)
can be applied to the currentlyindicated maps and plots.

Veloinfo cityrmation

Line profile map

ROI can be specified, not only
by dragging mouse with theleft button on the image, butalso by entering numericcoordinates directly.

“Next/Prev”
button, likea WEBbrowser(recordingROI history)

niositPoPosition-Velocity
map“Cursors”, manipulated by Mouse

Intensity histogram
plot is available.
Intensity range canbe specified on thehistogram.

● All the parameters to create images, such as integration
ranges, the order of moment map calculation, and velocity
step of the velocity channel maps can be specified via GUI
interactively.

● “Cursors” can specify the region of interests interactively and visually.
Spectral line profile, line profile maps, and position-velocity maps are automatically updated
when the cursors are moved.

Intensity profile plot

All the color table
implemented inIDL can beselected.
Color range andtransparency can beadjustedindividually.

Symbol/line color
can be specified as
RGB value, color
name, or via GUI
color selector (rightpanel)

Boundary lineplot

Radial intensity profile

Color bar, whose
direction is selectable,is available.

By dragging mouse with right buttonon the image, the statisticalinformation within the ROI is shownin the terminal. This statistics can be
re-used via “meas” structure, forsuch as contour levels.

● Also, all the operations can be executed by typing commands in

noi
itsPo
“Cursors”, manipulated by Mouse● Intensity profile along any cut and radial profile over any area can be created for any 2-D plot.
● The region of interests can be selected interactively via “Cursors”. Simultaneously, one can input
exact coordinates of the ROI using the GUI and command line interface.

2) Easy layout ofpublication-quality plots

the IDL command prompt or by executing IDL script file.
● It is easy to import data to FAZZ and/or export maps/plots to
IDL command line as the IDL variables. This feature makes FAZZ
as an viewer of one’s own small IDL programs.
● “Save Session” command creates an IDL script file, whichdescribes all the currently-showed modules and plots.
IDL> @fazz_script.pro… all the session will be recovered …
IDL>.. and other convenient features ..
● Synchronizing the parameters for multiple plots● Annotation files for KARMA, DS9, AIPS are
directly imported as it is.

● Resizable window can be divided into arbitrary number of regions. Maps and plots can beplaced into the region by a drag-and-drop manipulation on the tree of FAZZ_MANAGER.
● If more than one map or plots are placed on the same region, they are automaticallyoverlaid with each other by considering WCS.
● The arrangement of maps and plots can be saved as an EPS file.

Sample .ann file for KARMA (ftp://ftp.atnf.csiro.au/software/karma/data/annotations/) is reading by FAZZ (Left panel) and KVIS (Rightpanel). Note that “DLINE” command (white horizontal lines at the rightmost of the right panel) for KARMA is not available for FAZZ. Someother symbols are not seen in the left panel, because the definition ofnormal and pixel coordinates of FAZZ are different from those ofKARMA.

4) How to get FAZZ

● “Copy-and-paste” ability for plots, maps,annotations, and cursors is available.
● Accessing the astronomical database VizieR- 2MASS, IRAS PSC, etc. are plotted asannotation symbols.
● Observation preparation tools (in prep.)- NRO 45m telescope OTF observation
simulator/observing time estimator is now
under testing.

At this time, FAZZ has not been
- Source codes for the licensed IDL and package for the IDL Virtual Machine is available attested enough, and some bugs
and problems may be occurred.
Please feel free to contact- FAZZ has been tested at Nobeyama Radio Observatory for release as one of the official analysis tools.
- FAZZ will be also used as a visualization module for the reduction software of Akari FIS slow-scan observation. nikeda@isas.jaxa.jp.

http://hibari.isas.jaxa.jp/nikeda/fazz/fazz.html