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Milagro observations of potential TeV emitters
Institution:1. Department of Physics and Astronomy, Michigan State University, BioMedical Physical Sciences Building, East Lansing, MI 48824, United States;2. Department of Physics and Astronomy, University of California, Irvine, CA 92697, United States;3. Santa Cruz Institute for Particle Physics, University of California, 1156 High Street, Santa Cruz, CA 95064, United States;4. Department of Physics, University of Maryland, College Park, MD 20742, United States;5. Department of Physics, New York University, 4 Washington Place, New York, NY 10003, United States;6. Department of Physics, Pennsylvania State University, University Park, PA 16802, United States;7. Group P-23, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545, United States;8. Department of Physics and Astronomy, George Mason University, 4400 University Drive, Fairfax, VA 22030, United States;9. Instituto de Astronomía, Universidad Nacional Autónoma de México, D.F., México 04510, Mexico;10. NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States;11. Department of Physics, Michigan Technological University, Houghton, MI 49931, United States;12. Department of Physics, University of New Hampshire, Morse Hall, Durham, NH 03824, United States;13. University of California Santa Cruz, Natural Science 2, 1156 High Street, Santa Cruz, CA 95064, United States;14. Ohio State University, Lima, OH 45804, United States;15. Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, China;1. Center for Space Science and Astrophysics, Stanford University, Stanford, CA 94305, USA;2. Department of Physics, Purdue University, West Lafayette, IN 47907, USA;3. Edwards Air Force Base, CA 93524, USA;4. Department of Nuclear Engineering, Texas A&M University, College Station, TX 77843, USA;5. Department of Physics, United States Air Force Academy, Colorado Springs, CO 80920, USA;6. NASA/Ames Research Center, MS 245-3, Moffett Field, CA 94035, USA;1. Department of Physics, University of Alberta, Edmonton, Alberta T6G 2R3, Canada;2. Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Canada;3. Chemistry Department, Brookhaven National Laboratory, Upton, NY 11973-5000, United States;4. Ottawa-Carleton Institute for Physics, Department of Physics, Carleton University, Ottawa, Ontario K1S 5B6, Canada;5. Physics Department, University of Guelph, Guelph, Ontario N1G 2W1, Canada;6. Department of Physics and Astronomy, Laurentian University, Sudbury, Ontario P3E 2C6, Canada;7. Institute for Nuclear and Particle Astrophysics and Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States;8. Laboratório de Instrumentação e Física Experimental de Partículas, Av. Elias Garcia 14, 1°, 1000-149 Lisboa, Portugal;9. Los Alamos National Laboratory, Los Alamos, NM 87545, United States;10. Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, United States;11. Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, MA 02139, United States;12. Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK;13. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104-6396, United States;14. Department of Physics, Queen’s University, Kingston, Ontario K7L 3N6, Canada;15. Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, UK;p. SNOLAB, Sudbury, ON P3Y 1M3, Canada;q. Department of Physics, University of Texas at Austin, Austin, TX 78712-0264, United States;r. TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada;s. Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, WA 98195, United States;t. Department of Physics, University of Washington, Seattle, WA 98195, United States;1. Departamento de Física de Partículas & Instituto Galego de Física de Altas Enerxías, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain;2. University of Hawaii at Manoa, Department of Physics and Astronomy, Honolulu, HI 96822, USA
Abstract:This paper reports the results from three targeted searches of Milagro TeV sky maps: two extragalactic point source lists and one pulsar source list. The first extragalactic candidate list consists of 709 candidates selected from the Fermi-LAT 2FGL catalog. The second extragalactic candidate list contains 31 candidates selected from the TeVCat source catalog that have been detected by imaging atmospheric Cherenkov telescopes (IACTs). In both extragalactic candidate lists Mkn 421 was the only source detected by Milagro. This paper presents the Milagro TeV flux for Mkn 421 and flux limits for the brighter Fermi-LAT extragalactic sources and for all TeVCat candidates. The pulsar list extends a previously published Milagro targeted search for Galactic sources. With the 32 new gamma-ray pulsars identified in 2FGL, the number of pulsars that are studied by both Fermi-LAT and Milagro is increased to 52. In this sample, we find that the probability of Milagro detecting a TeV emission coincident with a pulsar increases with the GeV flux observed by the Fermi-LAT in the energy range from 0.1 GeV to 100 GeV.
Keywords:Astroparticle physics  Pulsars  Galaxies  Active galactic nuclei  Gamma-rays
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