The distance between these positions will be calculated and displayed. To return to Image Display at any time, press ESC . The photometry function will calculate the flux in a box, subtract the sky from a sky box around it, and convert the flux to an apparent magnitude based on a zeropoint. The photometry box is centered on the cursor, as is the sky box. The box is always square.
All photometric information is displayed in the window below the image.
To return to Image Display at any time, press ESC . Statistics mode will calculate the mean and standard deviation in a box. To move the box use the arrow keys.