# ADIL Browser

ADILViewerApplet is an applet that uses the Horizon classes to browse images from the NCSA Astronomy Digital Image Library (ADIL). The applet contains two displays, side by side. The left side is used to display the full image sub-sampled to fit within display region. The right side contains a "zoomed" sub-region of the image. One can click the mouse over a pixel in the left display to see a zoomed version centered on that pixel in the right display.

Below the two displays is a position display panel which tracks the sky position corresponding to the current position of the mouse. One can also pop-up the image's FITS header by clicking on the adjacent button.

The zooming factor can be changed by clicking the on one of the buttons below the position display or by entering a percent factor in the text field. A factor 100% means that one data pixel is displayed into one display pixel. Alternatively, one can enter choose the "Region" button; this allows one to draw a box in the left display indicating the region to appear in right display.

This example image is a view of the center of our Galaxy at radio frequencies. For more information, check the Preview Page for this image at the ADIL.