A -- GAMMA RAY LARGE AREA SPACE TELESCOPE (GLAST) SCIENCE INVESTIGATIONS The National Aeronautics and Space Administration (NASA) is releasing a Draft Announcement of Opportunity (AO) for community comment (Final Release anticipated for May or June 1999) for science investigations using the Gamma Ray Large Area Space Telescope (GLAST). GLAST is a new space mission for observing high-energy gamma-rays from celestial objects. Science investigations using GLAST are solicited both for investigations that propose the development of flight instruments for GLAST and for investigations that do not. NASA intends to select a single investigation proposing development of a Large Area Telescope and approximately four investigations which do not propose the development of flight instruments. NASA may select one or more investigations proposing development of secondary instruments. GLAST is not an approved program. GLAST is currently in Phase A (Concept Study) and will seek a new start in Fiscal Year 2002. GLAST launch is currently planned for 2005. Participation is open to all categories of organizations, foreign and domestic, including industry, educational institutions, nonprofit organizations, NASA centers, and other Government agencies. NASA welcomes comment of the Draft AO, which will be available through March 4, 1999, via the World Wide Web site: http://spacescience.nasa.gov/research.htm and http://glast.gsfc.nasa.gov/ao/. For those not having access to the Internet, a printed copy may be requested from the GLAST Study Office, Code 740.2, NASA Goddard Space Flight Center, Greenbelt, MD, 20771. Inquiries and comments should be directed to Dr. Paul Hertz (E-mail (paul.hertz@hq.nasa.gov). Note: The E-mail subject field must include the character string "GLAST AO". This notice constitutes a NASA Research Announcement as contemplated in FAR 6.102(d)(2). WEB: Click here for the latest information about this notice, http://nais.nasa.gov/EPS/HQ/date.html#GLAST-Draft-AO-99. E-MAIL: Paul L. Hertz, phertz@mail.hq.nasa.gov. Posted 02/03/99 (D-SN294381).

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