WFRF:(Pierbattista M.)
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Determination of the point-spread function for the fermi large area telescope from on-orbit data and limits on pair halos of active galactic nuclei
- Ackermann, M. (author)
- Ajello, M. (author)
- Allafort, A. (author)
- show more...
- Asano, K. (author)
- Atwood, W. B. (author)
- Baldini, L. (author)
- Ballet, J. (author)
- Barbiellini, G. (author)
- Bastieri, D. (author)
- Bechtol, K. (author)
- Bellazzini, R. (author)
- Bloom, E. D. (author)
- Bonamente, E. (author)
- Borgland, A. W. (author)
- Bottacini, E. (author)
- Brandt, T. J. (author)
- Bregeon, J. (author)
- Brigida, M. (author)
- Bruel, P. (author)
- Buehler, R. (author)
- Burnett, T. H. (author)
- Busetto, G. (author)
- Buson, S. (author)
- Caliandro, G. A. (author)
- Cameron, R. A. (author)
- Caraveo, P. A. (author)
- Casandjian, J. M. (author)
- Cecchi, C. (author)
- Charles, E. (author)
- Chaty, S. (author)
- Chekhtman, A. (author)
- Cheung, C. C. (author)
- Chiang, J. (author)
- Cillis, A. N. (author)
- Ciprini, S. (author)
- Claus, R. (author)
- Cohen-Tanugi, J. (author)
- Colafrancesco, S. (author)
- Cutini, S. (author)
- D'Ammando, F. (author)
- de Palma, F. (author)
- Dermer, C. D. (author)
- do Couto e Silva, E. (author)
- Drell, S. (author)
- Drlica-Wagner, A. (author)
- Dubois, R. (author)
- Favuzzi, C. (author)
- Fegan, S. J. (author)
- Ferrara, E. C. (author)
- Focke, W. B. (author)
- Fortin, P. (author)
- Fukazawa, Y. (author)
- Funk, S. (author)
- Fusco, P. (author)
- Gargano, F. (author)
- Gasparrini, D. (author)
- Gehrels, N. (author)
- Germani, S. (author)
- Giglietto, N. (author)
- Giordano, F. (author)
- Giroletti, M. (author)
- Glanzman, T. (author)
- Godfrey, G. (author)
- Grandi, P. (author)
- Grenier, I. A. (author)
- Grove, J. E. (author)
- Guiriec, S. (author)
- Hadasch, D. (author)
- Hayashida, M. (author)
- Hays, E. (author)
- Horan, D. (author)
- Hou, X. (author)
- Hughes, R. E. (author)
- Jogler, T. (author)
- Johannesson, G. (author)
- Johnson, R. P. (author)
- Johnson, A. S. (author)
- Kamae, T. (author)
- Kataoka, J. (author)
- Kerr, M. (author)
- Knoedlseder, J. (author)
- Kuss, M. (author)
- Lande, J. (author)
- Latronico, L. (author)
- Lavalley, C. (author)
- Lee, S. -H (author)
- Longo, F. (author)
- Loparco, F. (author)
- Lott, B. (author)
- Lovellette, M. N. (author)
- Lubrano, P. (author)
- Mazziotta, M. N. (author)
- McConville, W. (author)
- McEnery, J. E. (author)
- Mehault, J. (author)
- Michelson, P. F. (author)
- Mignani, R. P. (author)
- Mitthumsiri, W. (author)
- Mizuno, T. (author)
- Moiseev, A. A. (author)
- Monte, C. (author)
- Monzani, M. E. (author)
- Morselli, A. (author)
- Moskalenko, I. V. (author)
- Murgia, S. (author)
- Naumann-Godo, M. (author)
- Nemmen, R. (author)
- Nishino, S. (author)
- Norris, J. P. (author)
- Nuss, E. (author)
- Ohsugi, T. (author)
- Omodei, N. (author)
- Orienti, M. (author)
- Orlando, E. (author)
- Ormes, J. F. (author)
- Paneque, D. (author)
- Panetta, J. H. (author)
- Pelassa, V. (author)
- Perkins, J. S. (author)
- Pesce-Rollins, M. (author)
- Pierbattista, M. (author)
- Piron, F. (author)
- Pivato, G. (author)
- Poon, H. (author)
- Porter, T. A. (author)
- Raino, S. (author)
- Rando, R. (author)
- Razzano, M. (author)
- Razzaque, S. (author)
- Reimer, A. (author)
- Reimer, O. (author)
- Reyes, L. C. (author)
- Ritz, S. (author)
- Rochester, L. S. (author)
- Romoli, C. (author)
- Roth, M. (author)
- Sanchez, D. A. (author)
- Parkinson, P. M. Saz (author)
- Scargle, J. D. (author)
- Sgro, C. (author)
- Siskind, E. J. (author)
- Snyder, A. (author)
- Spandre, G. (author)
- Spinelli, P. (author)
- Stephens, T. E. (author)
- Suson, D. J. (author)
- Tajima, H. (author)
- Takahashi, H. (author)
- Tanaka, T. (author)
- Thayer, J. G. (author)
- Thayer, J. B. (author)
- Thompson, D. J. (author)
- Tibaldo, L. (author)
- Tibolla, O. (author)
- Tinivella, M. (author)
- Tosti, G. (author)
- Troja, E. (author)
- Usher, T. L. (author)
- Vandenbroucke, J. (author)
- Vasileiou, V. (author)
- Vianello, G. (author)
- Vitale, V. (author)
- von Kienlin, A. (author)
- Waite, A. P. (author)
- Wallace, E. (author)
- Weltevrede, P. (author)
- Winer, B. L. (author)
- Wood, K. S. (author)
- Wood, M. (author)
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- (creator_code:org_t)
- 2013
- 2013
- English.
- In: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 765:1, s. 54-
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- The Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope is a pair-conversion telescope designed to detect photons with energies from approximate to 20 MeV to > 300 GeV. The pre-launch response functions of the LAT were determined through extensive Monte Carlo simulations and beam tests. The point-spread function (PSF) characterizing the angular distribution of reconstructed photons as a function of energy and geometry in the detector is determined here from two years of on-orbit data by examining the distributions of gamma rays from pulsars and active galactic nuclei (AGNs). Above 3 GeV, the PSF is found to be broader than the pre-launch PSF. We checked for dependence of the PSF on the class of gamma-ray source and observation epoch and found none. We also investigated several possible spatial models for pair-halo emission around BL Lac AGNs. We found no evidence for a component with spatial extension larger than the PSF and set upper limits on the amplitude of halo emission in stacked images of low-and high-redshift BL Lac AGNs and the TeV blazars 1ES0229 + 200 and 1ES0347-121.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- galaxies: active
- galaxies: halos
- gamma rays: galaxies
- instrumentation: detectors
- intergalactic medium
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Ackermann, M.
- Ajello, M.
- Allafort, A.
- Asano, K.
- Atwood, W. B.
- Baldini, L.
- show more...
- Ballet, J.
- Barbiellini, G.
- Bastieri, D.
- Bechtol, K.
- Bellazzini, R.
- Bloom, E. D.
- Bonamente, E.
- Borgland, A. W.
- Bottacini, E.
- Brandt, T. J.
- Bregeon, J.
- Brigida, M.
- Bruel, P.
- Buehler, R.
- Burnett, T. H.
- Busetto, G.
- Buson, S.
- Caliandro, G. A.
- Cameron, R. A.
- Caraveo, P. A.
- Casandjian, J. M ...
- Cecchi, C.
- Charles, E.
- Chaty, S.
- Chekhtman, A.
- Cheung, C. C.
- Chiang, J.
- Cillis, A. N.
- Ciprini, S.
- Claus, R.
- Cohen-Tanugi, J.
- Colafrancesco, S ...
- Conrad, Jan
- Cutini, S.
- D'Ammando, F.
- de Palma, F.
- Dermer, C. D.
- do Couto e Silva ...
- Drell, S.
- Drlica-Wagner, A ...
- Dubois, R.
- Favuzzi, C.
- Fegan, S. J.
- Ferrara, E. C.
- Focke, W. B.
- Fortin, P.
- Fukazawa, Y.
- Funk, S.
- Fusco, P.
- Gargano, F.
- Gasparrini, D.
- Gehrels, N.
- Germani, S.
- Giglietto, N.
- Giordano, F.
- Giroletti, M.
- Glanzman, T.
- Godfrey, G.
- Grandi, P.
- Grenier, I. A.
- Grove, J. E.
- Guiriec, S.
- Hadasch, D.
- Hayashida, M.
- Hays, E.
- Horan, D.
- Hou, X.
- Hughes, R. E.
- Jackson, Miranda ...
- Jogler, T.
- Johannesson, G.
- Johnson, R. P.
- Johnson, A. S.
- Kamae, T.
- Kataoka, J.
- Kerr, M.
- Knoedlseder, J.
- Kuss, M.
- Lande, J.
- Larsson, Stefan
- Latronico, L.
- Lavalley, C.
- Lee, S. -H
- Longo, F.
- Loparco, F.
- Lott, B.
- Lovellette, M. N ...
- Lubrano, P.
- Mazziotta, M. N.
- McConville, W.
- McEnery, J. E.
- Mehault, J.
- Michelson, P. F.
- Mignani, R. P.
- Mitthumsiri, W.
- Mizuno, T.
- Moiseev, A. A.
- Monte, C.
- Monzani, M. E.
- Morselli, A.
- Moskalenko, I. V ...
- Murgia, S.
- Naumann-Godo, M.
- Nemmen, R.
- Nishino, S.
- Norris, J. P.
- Nuss, E.
- Ohsugi, T.
- Omodei, N.
- Orienti, M.
- Orlando, E.
- Ormes, J. F.
- Paneque, D.
- Panetta, J. H.
- Pelassa, V.
- Perkins, J. S.
- Pesce-Rollins, M ...
- Pierbattista, M.
- Piron, F.
- Pivato, G.
- Poon, H.
- Porter, T. A.
- Raino, S.
- Rando, R.
- Razzano, M.
- Razzaque, S.
- Reimer, A.
- Reimer, O.
- Reyes, L. C.
- Ritz, S.
- Rochester, L. S.
- Romoli, C.
- Roth, M.
- Sanchez, D. A.
- Parkinson, P. M. ...
- Scargle, J. D.
- Sgro, C.
- Siskind, E. J.
- Snyder, A.
- Spandre, G.
- Spinelli, P.
- Stephens, T. E.
- Suson, D. J.
- Tajima, H.
- Takahashi, H.
- Tanaka, T.
- Thayer, J. G.
- Thayer, J. B.
- Thompson, D. J.
- Tibaldo, L.
- Tibolla, O.
- Tinivella, M.
- Tosti, G.
- Troja, E.
- Usher, T. L.
- Vandenbroucke, J ...
- Vasileiou, V.
- Vianello, G.
- Vitale, V.
- von Kienlin, A.
- Waite, A. P.
- Wallace, E.
- Weltevrede, P.
- Winer, B. L.
- Wood, K. S.
- Wood, M.
- Yang, Zhaoyu
- Zimmer, Stephan
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- About the subject
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- NATURAL SCIENCES
- NATURAL SCIENCES
- and Physical Science ...
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- NATURAL SCIENCES
- NATURAL SCIENCES
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- and Astronomy Astrop ...
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- Astrophysical Jo ...
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- Royal Institute of Technology
- Stockholm University
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