This can be used to overlay the position of fiducial stars onto an image, for example. Positions can be input manually or from a list.
To position marks interactively display the image and then
cl> noao no> images im> tv tv> tvmark 1 STDIN interactive+ type . to put dot at cursor position type + to put cross at cursor position type c to put circle at cursor position (must specify hidden parameter ``radii'') <ctrl>d to exit
See help file and parameters for other options.
To display marks from a list, ``starpos'', the list should have the format of a double column with positions in logical coordinates (= same as saoimage readout).
pr> tvmark 1 starpos interac-