GeminiFocus October 2013 | Page 17

The participating partners — United States, Canada, Australia, and Argentina — are contributing up to 20 percent of their time to a common pool for these programs. As a guideline, LPs either require significantly more time than a partner typically approves for a single program, or are extend over two to six semesters, or both. Large programs are expected to promote collaborations across the partnership’s communities, have significant scientific impact, and, normally, provide a homogeneous data set potentially for more general use. PIs must be based in an institution of one of the participating partner countries, though there is no restriction on Co-Investigator affiliation. With the LPs, Gemini will also introduce a new observing mode, “priority visiting observing.” In this mode, the PI or team member comes to Gemini prepared to observe either their own program, if the conditions are sufficiently good, or execute approved queue programs if the conditions are too poor for the LP. The LP will be charged only for time devoted to the program, and additional observations may be made by Gemini staff during the semester. With this mode and that of traditional “classical” observing, we encourage the benefits of being directly involved with the program team in observing, and their interaction with Gemini staff who also support the program. approved programs will be reviewed annually. There may be additional partner-specific procedures or requirements, as well. Complete details will be available with the Announcement of Opportunity, which Gemini expects to release in early December 2013. Proposals will be due around the usual 2014B deadline at the end of March 2014. Instruments and observing modes that are fully commissioned at the time of the announcement of opportunity will be open for LPs; a specific list will be provided at that time. Update on Gemini North Shutdown As this issue goes to e-press, an extensive planned shutdown at Gemini North, which started on September12th, has ended and the telescope is back on the sky doing science. The primary objective of the shutdown, to recoat the 8-meter primary mirror; the mirror now has unprecedented success with unprecedented reflectivity (blue: 470 nm = 93.0 %; green: 530 nm = 95.0 %; red: 650 nm = 95.2 %; near-infrared 880 nm = 96. 8