SMART Quick Look

The Quick Look FITS file viewer has been developed for preliminary viewing ("quick look") FITS files before or at selected points during in depth processing.

To invoke Quick Look call it from an "IDL>" prompt with one calling parameter.
The calling parameter is an IDL pointer to an array of (one or more) datasets in YAAAR format.
(If necessary this can be made by using the sc_read_fits_bcd? routine. See also Scripting.)

The "IDL>" command prompt syntax is :

IDL> sc_read_fits_bcd, tot_ptr_bcd, bcd_dir='/test/data/directory/'

IDL> sm_quicklook, tot_ptr_bcd

The sc_read_fits_bcd? routine will read all FITS files in the relevant directory and convert them to YAAAR format. Please ensure that the files are BCD type before beginning.

The Quick Look viewer window is shown below. On first invocation the two view windows are blank :

To use the viewer do the following :

1. Click on the "Select BCD" dropdown list. This will display a list of all input datasets.
2. Select the dataset you want to examine.
3. Some FITS header data from it will appear in the top right hand box :
   • "TARGETNA" - target name
   • "OBSRVR" - observer
   • "RA_SLT" - slit right ascension
   • "DEC_SLT" - slit declination

4. The "Lower Level" and "Upper Level" boxes and the "Display" button are for changing the image intensity in the first view box.
   Type in the desired intensity pixel values and click on "Display" to effect the change.
5. The first display box shows the FITS image.
6. The box to the left of the first display box changes depending on the module the selected FITS file comes from.
   In the example shown above it is headed "LONG-LOW Orders", this will change to "SHORT-LOW Orders" etc. if other module FITS files are being viewed.
7. The box itself lists the orders in the spectra, with their wavelengths, 3 for low resoloution, 10 for high and a final "Show All Orders" option. Click on the relevant radio button to select.
8. The second, (main), display box, displays the average intensity, in flux units ACROSS a given order. The horizontal axis is in pixels across the order.
9. The example shown above is for "Show All Orders" selected for Long-Low, a three order spectra. Selecting an indivdual order will display a bigger plot for just the one selected order.
10. Clicking on "Exit" will exit the window.

NOTE: Quick Look is designed ONLY for preliminary viewing of FITS files and order spectra only. It is not intended for in-depth analysis.

Two more examples of Quick Look displays are shown below :

• The left hand image shows all ten orders displayed from a high resoloution spectra (Short-High in this case).
• The right hand images shows an indivdual order displayed.