SAOImage DS9 developement has been made possible by funding from the Chandra X-ray Science Center (NAS8-03060) and the High Energy Astrophysics Science Archive Center (NCC5-568).
If you have found SAOImage DS9 to be helpful in your research, the following acknowledgment would be appreciated
"This research has made use of SAOImage DS9, developed by Smithsonian Astrophysical Observatory"or reference the following paper 2003adass..12..489J