NASA/Headquarters Acquisition Division, Code CW, 300E Street SW, Washington, DC 20546

A -- ROSSI X-RAY TIMING EXPLORER (RXTE) GUEST OBSERVER PROGRAM (CYCLE 3), NRA-97-OSS-09 SOL NRA-97-OSS-09 DUE 090597 POC Dr. Paul Hertz, Staff Scientist For High Energy Astrophisics, Phone (202) 358-0351, Fax (202) 358-3097, Email Paul.Hertz@hq.nasa.gov WEB: Click here for the latest information about this notice, http://procurement.nasa.gov/EPS/HQ/date.html#NRA-97-OSS-09. E-MAIL: Dr. Paul Hertz, Paul.Hertz@hq.nasa.gov. RELEASE DATE: May 26, 1997; PROPOSAL DUE DATE: September 5, 1997 The National Aeronautics and Space Administration (NASA), Office of Space Science (OSS), is releasing a Research Announcement (NRA 97-OSS-09) entitled Rossi X-ray Timing Explorer Guest Observer Program (Cycle 3) that solicits proposals for participation in the NASA OSS program to acquire and analyze scientific data from the Rossi X-ray Timing Explorer (RXTE). This Research Announcement is the third for RXTE guest observations and solicits proposals for observations to be carried out beginning about December 1, 1997, and lasting twelve months. Participation in this program is open to all categories of organizations, both domestic and foreign, including educational institutions, NASA Centers, profit and nonprofit organizations, and other U. S. Government agencies. This notice constitutes a NASA Research Announcement as contemplated in Federal Acquisition Regulation (FAR) 6.102(d)(2). Upon its release date, this Research Announcement may be downloaded directly from the World Wide Web site: http://www.hq.nasa.gov/office/oss by selecting the Research Opportunities menu. Printed copies may be requested by E-mail to xtehelp@athena.gsfc.nasa.gov or from the RXTE Guest Observer Facility, Code 660.2, Goddard Space Flight Center, NASA, Greenbelt, MD 20771-0001; phone (301) 286-7063. The NRA closing date is September 5, 1997. Obtain additional programmatic information from Dr. Paul Hertz, Research Program Management Division, Code SR, NASA Headquarters, Washington, DC 20546-0001; phone (202) 358-0351; E-mail paul.hertz@hq.nasa.gov. See Numbered Note 26 regarding procurement of non-commercial items. An ombudsman has been appointed -- See Note "B". Any referenced numbered notes can be viewed at the following URL: http://genesis.gsfc.nasa.gov/nnotes.htm. (0122)

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