Isotropic diffuse gamma-ray emission 0.1-820GeV Virtual Observatory Resource

Authors

1. Ackermann M.
2. Ajello M.
3. Albert A.
4. Atwood W.B.
5. Baldini L.
6. Ballet J.,Barbiellini G.
7. Bastieri D.
8. Bechtol K.
9. Bellazzini R.
10. Bissaldi E.,Blandford R.D.
11. Bloom E.D.
12. Bottacini E.
13. Brandt T.J.
14. Bregeon J.,Bruel P.
15. Buehler R.
16. Buson S.
17. Caliandro G.A.
18. Cameron R.A.
19. Caragiulo M.,Caraveo P.A.
20. Cavazzuti E.
21. Cecchi C.
22. Charles E.
23. Chekhtman A.
24. Chiang J.,Chiaro G.
25. Ciprini S.
26. Claus R.
27. Cohen-Tanugi J.
28. Conrad J.
29. Cuoco A.,Cutini S.
30. D'Ammando F.
31. de Angelis A.
32. de Palma F.
33. Dermer C.D.,Digel S.W.
34. do Couto e Silva E.
35. Drell P.S.
36. Favuzzi C.
37. Ferrara E.C.,Focke W.B.
38. Franckowiak A.
39. Fukazawa Y.
40. Funk S.
41. Fusco P.
42. Gargano F.,Gasparrini D.
43. Germani S.
44. Giglietto N.
45. Giommi P.
46. Giordano F.,Giroletti M.
47. Godfrey G.
48. Gomez-Vargas G.A.
49. Grenier I.A.
50. Guiriec S.,Gustafsson M.
51. Hadasch D.
52. Hayashi K.
53. Hays E.
54. Hewitt J.W.
55. Ippoliti P.,Jogler T.
56. Johannesson G.
57. Johnson A.S.
58. Johnson W.N.
59. Kamae T.,Kataoka J.
60. Knodlseder J.
61. Kuss M.
62. Larsson S.
63. Latronico L.
64. Li J.
65. Li L.,Longo F.
66. Loparco F.
67. Lott B.
68. Lovellette M.N.
69. Lubrano P.
70. Madejski G.M.,Manfreda A.
71. Massaro F.
72. Mayer M.
73. Mazziotta M.N.
74. McEnery J.E.,Michelson P.F.
75. Mitthumsiri W.
76. Mizuno T.
77. Moiseev A.A.
78. Monzani M.E.,Morselli A.
79. Moskalenko I.V.
80. Murgia S.
81. Nemmen R.
82. Nuss E.
83. Ohsugi T.,Omodei N.
84. Orlando E.
85. Ormes J.F.
86. Paneque D.
87. Panetta J.H.
88. Perkins J.S.,Pesce-Rollins M.
89. Piron F.
90. Pivato G.
91. Porter T.A.
92. Raino S.
93. Rando R.,Razzano M.
94. Razzaque S.
95. Reimer A.
96. Reimer O.
97. Reposeur T.
98. Ritz S.,Romani R.W.
99. Sanchez-Conde M.
100. Schaal M.
101. Schulz A.
102. Sgro C.
103. Siskind E.J.,Spandre G.
104. Spinelli P.
105. Strong A.W.
106. Suson D.J.
107. Takahashi H.,Thayer J.G.
108. Thayer J.B.
109. Tibaldo L.
110. Tinivella M.
111. Torres D.F.
112. Tosti G.,Troja E.
113. Uchiyama Y.
114. Vianello G.
115. Werner M.
116. Winer B.L.
117. Wood K.S.,Wood M.
118. Zaharijas G.
119. Zimmer S.

Published by

CDS

Abstract

The {gamma}-ray sky can be decomposed into individually detected sources, diffuse emission attributed to the interactions of Galactic cosmic rays with gas and radiation fields, and a residual all-sky emission component commonly called the isotropic diffuse {gamma}-ray background (IGRB). The IGRB comprises all extragalactic emissions too faint or too diffuse to be resolved in a given survey, as well as any residual Galactic foregrounds that are approximately isotropic. The first IGRB measurement with the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope (Fermi) used 10 months of sky-survey data and considered an energy range between 200MeV and 100GeV. Improvements in event selection and characterization of cosmic-ray backgrounds, better understanding of the diffuse Galactic emission (DGE), and a longer data accumulation of 50 months allow for a refinement and extension of the IGRB measurement with the LAT, now covering the energy range from 100MeV to 820GeV. The IGRB spectrum shows a significant high-energy cutoff feature and can be well described over nearly four decades in energy by a power law with exponential cutoff having a spectral index of 2.32+/-0.02 and a break energy of (279+/-52)GeV using our baseline DGE model. The total intensity attributed to the IGRB is (7.2+/-0.6)x10^-6^/cm2/s/sr above 100MeV, with an additional +15%/-30% systematic uncertainty due to the Galactic diffuse foregrounds.

Keywords

1. gamma-ray-astronomy

Bibliographic source Bibcode

2015ApJ...799...86A

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https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/799/86

IVOA Identifier IVOID

ivo://CDS.VizieR/J/ApJ/799/86

Document Object Identifer DOI

doi:10.26093/cds/vizier.17990086

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