Extended surface photometry is performed using the "Surface photometry..." toolbox that is found in the "Image-Analysis" menu.
This toolbox allows the interactive identification of extended objects (galaxies) and profile measurements using ellipse fitting. The resultant fits are shown over the images and the measurements can be inspected. It is based on the ESP (see Starlink User Note 180) programs ELLPRO and ELLFOU. Usage help is available:
