RMARK will prompt the user to move the cursor to a point at the distance from the object center to which the photometry is to be performed. The user then strikes the key "P". A cross will be displayed at this point and the user will be given the option of choosing another position. Once the user is satisfied with the position chosen, RMARK will compute the distance of this point from the object center. This distance is then loaded into the VISTA variable RMAX.
When RMAX is given as a command line keyword in EMAG, the value of this variable is retrieved and the photometry proceeds out to this radius.
See Also: EMARK, EMAG