This program annually attracts many international and national visitors. They come for a well-defined scientific purpose which may be to collaborate with a specific individual, to access unique data, or to use specialized facilities.
Visits vary from a few days to several weeks or months, and in some cases up to a year.
Stipend support varies with the length of the visit and the amount of support being provided by the visitor's home institution, or by fellowship such as a Guggenheim, NATO, etc. An overview of the Observatory and its facilities can be found here. Application to the program is made by directly contacting a member of the research staff to request support. Awards are dependent upon availability of funding.