Southern Standard Stars for the u'g'r'i'z' System:

"Having a photometric system without standard stars is like
 measuring the distance from New York to Paris in meters without 
 defining the length of the meter."

                        --Arne A. Henden & Ronald H. Kaitchuck
                          "Astronomical Photometry"
                          (copyright 1990, Willman-Bell, Inc.)




"The only uniform CCD is a dead CCD"

                        --George Jacoby (attributed)




"Imaging is not photometry"

                        --Fred Vrba (attributed)




"Anybody can do photometry when it's clear!"

                        --Olin Eggen (attributed)