FITS file, visualize a BINARY_TBL

You can bring dtspec.fits from :

http://ioda.lal.in2p3.fr/download/data/fits

and deposit the file in your document directory (see Data files).

Then start ioda and select the file with : 

     Files -> .fits -> dtspec.fits

Whence selected you should see the list of HDUs :

fits_dtspec_0.png

Here there are two HDUs, an IMAGE_HDU and a BINARY_TBL one. If doing : 

     1 IMAGE_HDU -> keys

you should see :

fits_dtspec_1.png

and then see that the "NAXIS" key is 0, which means that the image is empty. If attempting to visualize it you should see at end :

fits_dtspec_2.png

If you go back and select the "2 BINARY_TBL" and then "vis", ioda shows the list of columns with their name and their type.

fits_dtspec_3.png

Choose for example the "6 varnormb02 TFLOAT" one. ioda proposes you an "histogram booking panel" with parameters to book a 1D histogram : title, number of bins, min x axis, max x axis and shows you also the mean and rms of the data in the choosen column :

fits_dtspec_4.png

The proposed min/max are : 

     hmn = mean - rms * 5
     hmx = mean + rms * 5

You can modify the proposed title, number of bins, min, max by activating the entry area of a parameter and using the numeric or alphanumeric keyboard.

fits_dtspec_5.png
fits_dtspec_6.png

When done, activate the "Ok" of the booking panel, ioda will then create the histogram, fill it with the data of the column and plot it :

fits_dtspec_7.png

From here you can map the user interface by activating the bottom screen/window area. Then activate the "Home" button and the "out.jpg" to produce a out.jpg JPEG file of the picture.