Overlay multiple image surveys as a false-color image
-
First point your browser to the Aladin Java applet at http://aladin.u-strasbg.fr/AladinJava. There will be a screen about accepting a certificate from the University of Strasbourg -- you will need to accept it.
-
Click on "Load..." to bring up the Server Selector window
-
(1) Type in the object name or coordinates and click Submit (3).
-
Some surveys will be displayed that cover your target, select three of them (2), and click Submit (3).
-
You should see all three layers appearing in the main window (4)-- be patient as they download.
-
Click on the RGB button (5) in the toolbar, and a popup window will ask you how to map the layers to the red, green, and blue channels.
-
If you do not like the color mixture, you can adjust the contrast levels of the data layers with the Pixel button in the toolbar, then generate another color image.
-
Aladin can do much more that this simple overlay. Read about Aladin in the "Help...." tab.
 |
Supported by the National Science Foundation Member of the International Virtual Observatory Alliance |
 |