Jacoby, George HBouchez, AColless, MatthewDePoy, DarrenFabricant, DanHinz, PhilipJaffe, Daniel TJohns, MattMcCarthy, PatrickMcGregor, PeterShectman, StephenSzentgyorgyi, Andrew2015-12-13July 1-6 29780819491473http://hdl.handle.net/1885/71423The Giant Magellan Telescope (GMT) is a 25.4-m optical/infrared telescope constructed from seven 8.4-m primary mirror segments. The collecting area is equivalent to a 21.6-m filled aperture. The instrument development program was formalized about two years ago with the initiation of 14-month conceptual design studies for six candidate instruments. These studies were completed at the end of 2011 with a design review for each. In addition, a feasibility study was performed for a fiber-feed facility that will direct the light from targets distributed across GMT's full 20 arcmin field of view simultaneously to three spectrographs. We briefly describe the features and science goals for these instruments, and the process used to select those instruments that will be funded for fabrication first. Detailed reports for most of these instruments are presented separately at this meeting.Author/s retain copyrightKeywords: Design review; ELT; Feasibility studies; Field of views; Giant magellan telescopes; GMT; Instrument development; Multi-object spectrograph; Primary mirror segments; Selection process; Adaptive optics; Astronomy; Conceptual design; Imaging techniques; Infr Adaptive optics; ELT; GMT; Imaging; Infrared instruments; Integral-field spectrograph; Multi-object spectrograph; Optical instruments; Spectrograph201210.1117/12.9254022016-02-24