FIGURE 6.1 All-sky map as observed by the Fermi Gamma-ray Space Telescope. The bright band of gamma rays comes from unresolved sources associated with our Milky Way galaxy. Roughly 700 point sources that can be identified with known objects are seen, as are another 600 unidentified sources, including many relativistic jets associated with other galaxies. SOURCE: NASA/DOE/International Fermi Large Area Telescope Collaboration.

FIGURE 6.1 All-sky map as observed by the Fermi Gamma-ray Space Telescope. The bright band of gamma rays comes from unresolved sources associated with our Milky Way galaxy. Roughly 700 point sources that can be identified with known objects are seen, as are another 600 unidentified sources, including many relativistic jets associated with other galaxies. SOURCE: NASA/DOE/International Fermi Large Area Telescope Collaboration.

frontier).1 Several national laboratories and the university community are involved in a program with a budget of roughly $80 million in FY2009 (out of a total OHEP budget of about $800 million) and in some scenarios this amount is projected to increase to $160 million by the end of the decade. In 2009, HEPAP’s Particle Astrophysics Scientific Assessment Panel (PASAG) was charged with recommending a prioritized program in particle astrophysics for DOE. The PASAG report is discussed further in Chapter 7.2

DOE is currently supporting a number of important astrophysics projects—including Auger-South, the Ultra High Energy Cosmic Ray Observatory in Argentina, the Very High Energy Gamma Ray Telescope (VERITAS) in Arizona, the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope (Figure 6.1), sev-

1

U.S. Department of Energy, U.S. Particle Physics: Scientific Opportunities, A Strategic Plan for the Next Ten Years, Report of the Particle Physics Project Prioritization Panel, Office of High Energy Physics, U.S. Department of Energy, May 29, 2008, available at http://www.er.doe.gov/hep/panels/reports/hepap_reports.shtml.

2

U.S. Department of Energy, Report of the HEPAP Particle Astrophysics Scientific Assessment Group (PASAG), October 23, 2009, available at http://www.er.doe.gov/hep/panels/reports/hepap_reports.shtml.



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