The Committee on Astronomy and Astrophysics (CAA), at its meeting on September 8, 1997, was briefed on the legislative report accompanying the bill to authorize appropriations for fiscal years 1998 and 1999 for the National Science Foundation (NSF). The report raised a number of questions about trends in support for research in astronomy and the overall robustness of the programs providing that support. At its meeting, the CAA heard the views of NSF and the National Aeronautics and Space Administration (NASA) on these issues. In consultation with the Board on Physics and Astronomy, the Space Studies Board, and representatives of NASA and NSF, the committee accepted the task of studying three of the questions raised by the House Science Committee (HSC). It was intended that the results of the study would help guide federal support of basic research for the next decade and serve as analytical input to the new 2000 decadal survey of the Astronomy and Astrophysics Survey Committee (AASC). The study would not offer specific funding recommendations, but rather would provide a background analysis of the alignment between available resources, agency priorities, and the vitality of the basic research program.

The Committee on Astronomy and Astrophysics (CAA), at its meeting on September 8, 1997, was briefed on the legislative report accompanying the bill to authorize appropriations for fiscal years 1998 and 1999 for the National Science Foundation (NSF). The report raised a number of questions about trends in support for research in astronomy and the overall robustness of the programs providing that support. At its meeting, the CAA heard the views of NSF and the National Aeronautics and Space Administration (NASA) on these issues. In consultation with the Board on Physics and Astronomy, the Space Studies Board, and representatives of NASA and NSF, the committee accepted the task of studying three of the questions raised by the House Science Committee (HSC). It was intended that the results of the study would help guide federal support of basic research for the next decade and serve as analytical input to the new 2000 decadal survey of the Astronomy and Astrophysics Survey Committee (AASC). The study would not offer specific funding recommendations, but rather would provide a background analysis of the alignment between available resources, agency priorities, and the vitality of the basic research program.

The Roman Space Telescope will measurably advance knowledge of dark energy and exoplanet demographics. Locally, it will likely enhance understanding of the structure and substructure of the Milky Way and nearby galaxies, including a census of the predicted but elusive ultra-faint dwarf galaxies. At high redshift, it can provide information on the topology of reionization and the abundance of sources like active galactic nuclei and pair-instability supernovae. With a wavelength range of 0.48-2.3 ?m, the Roman Wide Field Imager has the largest etendue of any existing or planned optical/infrared space observatory. The coronagraph technology demonstration instrument will pioneer new capabilities that will be the basis for future instruments capable of directly detecting and characterizing Earth-like planets around nearby stars. If the technology demonstration is successful, observations with the coronagraph could make substantial advances in the study of planetary and disk systems.

At the request of NASA, this report reviews the Roman Space Telescope science program to set the appropriate mix of survey time devoted to the three Core Community Surveys (which address the weak lensing, baryon acoustic oscillations, supernovae, and microlensing programs in NWNH) relative to guest investigator-led observing programs during the primary 5-year mission.

The Committee on Astronomy and Astrophysics (CAA), at its meeting on September 8, 1997, was briefed on the legislative report accompanying the bill to authorize appropriations for fiscal years 1998 and 1999 for the National Science Foundation (NSF). The report raised a number of questions about trends in support for research in astronomy and the overall robustness of the programs providing that support. At its meeting, the CAA heard the views of NSF and the National Aeronautics and Space Administration (NASA) on these issues. In consultation with the Board on Physics and Astronomy, the Space Studies Board, and representatives of NASA and NSF, the committee accepted the task of studying three of the questions raised by the House Science Committee (HSC). It was intended that the results of the study would help guide federal support of basic research for the next decade and serve as analytical input to the new 2000 decadal survey of the Astronomy and Astrophysics Survey Committee (AASC). The study would not offer specific funding recommendations, but rather would provide a background analysis of the alignment between available resources, agency priorities, and the vitality of the basic research program.

The Committee on Astronomy and Astrophysics (CAA), at its meeting on September 8, 1997, was briefed on the legislative report accompanying the bill to authorize appropriations for fiscal years 1998 and 1999 for the National Science Foundation (NSF). The report raised a number of questions about trends in support for research in astronomy and the overall robustness of the programs providing that support. At its meeting, the CAA heard the views of NSF and the National Aeronautics and Space Administration (NASA) on these issues. In consultation with the Board on Physics and Astronomy, the Space Studies Board, and representatives of NASA and NSF, the committee accepted the task of studying three of the questions raised by the House Science Committee (HSC). It was intended that the results of the study would help guide federal support of basic research for the next decade and serve as analytical input to the new 2000 decadal survey of the Astronomy and Astrophysics Survey Committee (AASC). The study would not offer specific funding recommendations, but rather would provide a background analysis of the alignment between available resources, agency priorities, and the vitality of the basic research program.

The Roman Space Telescope will measurably advance knowledge of dark energy and exoplanet demographics. Locally, it will likely enhance understanding of the structure and substructure of the Milky Way and nearby galaxies, including a census of the predicted but elusive ultra-faint dwarf galaxies. At high redshift, it can provide information on the topology of reionization and the abundance of sources like active galactic nuclei and pair-instability supernovae. With a wavelength range of 0.48-2.3 ?m, the Roman Wide Field Imager has the largest etendue of any existing or planned optical/infrared space observatory. The coronagraph technology demonstration instrument will pioneer new capabilities that will be the basis for future instruments capable of directly detecting and characterizing Earth-like planets around nearby stars. If the technology demonstration is successful, observations with the coronagraph could make substantial advances in the study of planetary and disk systems.

At the request of NASA, this report reviews the Roman Space Telescope science program to set the appropriate mix of survey time devoted to the three Core Community Surveys (which address the weak lensing, baryon acoustic oscillations, supernovae, and microlensing programs in NWNH) relative to guest investigator-led observing programs during the primary 5-year mission.