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29 results on '"Siegal-Gaskins, J."'

1. Cosmic Frontier Indirect Dark Matter Detection Working Group Summary

Author

Buckley, J., Cowen, D. F., Profumo, S., Archer, A., Cahill-Rowley, M., Cotta, R., Digel, S., Drlica-Wagner, A., Ferrer, F., Funk, S., Hewett, J., Holder, J., Humensky, B., Ismail, A., Israel, M., Jeltema, T., Olinto, A., Peter, A., Pretz, J., Rizzo, T., Siegal-Gaskins, J., Smith, A., Staszak, D., Vandenbroucke, J., and Wood, M.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Extragalactic Astrophysics, High Energy Physics - Phenomenology
Abstract

As part of the Snowmass process, the Cosmic Frontier Indirect-Detection subgroup (CF2) has drawn on input from the Cosmic Frontier and the broader Particle Physics community to produce this document. The purposes of this report are to identify opportunities for dark matter science through indirect detection, to give an overview of the primary scientific drivers for indirect searches for dark matter, and to survey current and planned experiments that have, as a large part of their scientific program, the goal of searching for indirect (or astrophysical) signatures of dark matter. We primarily address existing experiments with a large U.S. role, or future experiments where a U.S. contribution is sought. We also address the limitations of this technique, and answer the tough questions relevant to this subgroup posed by the HEP community through the Snowmass process., Comment: Snowmass Indirect Dark Matter Detection CF2 Working Group Summary, 85 pages, 25 figures; a version with higher-resolution figures can be downloaded at http://scipp.ucsc.edu/~profumo/CF2/driverFile.pdf

Published
2013

2. Dark Matter implications of Fermi-LAT measurement of anisotropies in the diffuse gamma-ray background

Author

Gomez-Vargas, G. A., Cuoco, A., Linden, T., Sanchez-Conde, M. A., Siegal-Gaskins, J. M., Delahaye, T., Fornasa, M., Komatsu, E., Prada, F., and Zavala, J.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Phenomenology
Abstract

The detailed origin of the diffuse gamma-ray background is still unknown. However, the contribution of unresolved sources is expected to induce small-scale anisotropies in this emission, which may provide a way to identify and constrain the properties of its contributors. Recent studies have predicted the contributions to the angular power spectrum (APS) from extragalactic and galactic dark matter (DM) annihilation or decay. The Fermi-LAT collaboration reported detection of angular power with a significance larger than $3\sigma$ in the energy range from 1 GeV to 10 GeV on 22 months of data [Ackermann et al. 2012]. For these preliminary results the already published Fermi-LAT APS measurements [Ackermann et al. 2012] are compared to the accurate predictions for DM anisotropies from state-of-the-art cosmological simulations as presented in [Fornasa et al. 2013] to derive constraints on different DM candidates., Comment: 2012 Fermi Symposium proceedings - eConf C121028

Published
2013
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3. Anisotropies in the diffuse gamma-ray background measured by the Fermi LAT

Author

Ackermann, M., Ajello, M., Albert, A., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Bloom, E. D., Bonamente, E., Borgland, A. W., Brandt, T. J., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Cecchi, C., Charles, E., Chekhtman, A., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Cuoco, A., Cutini, S., D'Ammando, F., de Palma, F., Dermer, C. D., Digel, S. W., Silva, E. do Couto e, Drell, P. S., Drlica-Wagner, A., Dubois, R., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Fortin, P., Fukazawa, Y., Fusco, P., Gargano, F., Gasparrini, D., Germani, S., Giglietto, N., Giroletti, M., Glanzman, T., Godfrey, G., Gomez-Vargas, G. A., Grégoire, T., Grenier, I. A., Grove, J. E., Guiriec, S., Gustafsson, M., Hadasch, D., Hayashida, M., Hayashi, K., Hou, X., Hughes, R. E., Jóhannesson, G., Johnson, A. S., Kamae, T., Knödlseder, J., Kuss, M., Lande, J., Latronico, L., Lemoine-Goumard, M., Linden, T., Lionetto, A. M., Garde, M. Llena, Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Mazziotta, M. N., McEnery, J. E., Mitthumsiri, W., Mizuno, T., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Naumann-Godo, M., Norris, J. P., Nuss, E., Ohsugi, T., Okumura, A., Orienti, M., Orlando, E., Ormes, J. F., Paneque, D., Panetta, J. H., Parent, D., Pavlidou, V., Pesce-Rollins, M., Pierbattista, M., Piron, F., Pivato, G., Rainò, S., Rando, R., Reimer, A., Reimer, O., Roth, M., Sbarra, C., Schmitt, J., Sgrò, C., Siegal-Gaskins, J., Siskind, E. J., Spandre, G., Spinelli, P., Strong, A. W., Suson, D. J., Takahashi, H., Tanaka, T., Thayer, J. B., Tibaldo, L., Tinivella, M., Torres, D. F., Tosti, G., Troja, E., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vitale, V., Waite, A. P., Winer, B. L., Wood, K. S., Wood, M., Yang, Z., Zimmer, S., and Komatsu, E.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Phenomenology
Abstract

The contribution of unresolved sources to the diffuse gamma-ray background could induce anisotropies in this emission on small angular scales. We analyze the angular power spectrum of the diffuse emission measured by the Fermi LAT at Galactic latitudes |b| > 30 deg in four energy bins spanning 1 to 50 GeV. At multipoles \ell \ge 155, corresponding to angular scales \lesssim 2 deg, angular power above the photon noise level is detected at >99.99% CL in the 1-2 GeV, 2-5 GeV, and 5-10 GeV energy bins, and at >99% CL at 10-50 GeV. Within each energy bin the measured angular power takes approximately the same value at all multipoles \ell \ge 155, suggesting that it originates from the contribution of one or more unclustered source populations. The amplitude of the angular power normalized to the mean intensity in each energy bin is consistent with a constant value at all energies, C_P/^2 = 9.05 +/- 0.84 x 10^{-6} sr, while the energy dependence of C_P is consistent with the anisotropy arising from one or more source populations with power-law photon spectra with spectral index \Gamma_s = 2.40 +/- 0.07. We discuss the implications of the measured angular power for gamma-ray source populations that may provide a contribution to the diffuse gamma-ray background., Comment: 28 pages, 20 figures; accepted for publication in Phys. Rev. D; Contact authors: A. Cuoco, E. Komatsu, T. Linden, M. N. Mazziotta, J. Siegal-Gaskins, V. Vitale

Published
2012
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4. Anisotropies in the diffuse gamma-ray background measured by Fermi LAT

Author

Cuoco, A., Linden, T., Mazziotta, M. N., Siegal-Gaskins, J. M., Vitale, Vincenzo, and Komatsu, E.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Phenomenology
Abstract

The small angular scale fluctuations of the (on large scale) isotropic gamma-ray background (IGRB) carry information about the presence of unresolved source classes. A guaranteed contribution to the IGRB is expected from the unresolved gamma-ray AGN while other extragalactic sources, Galactic gamma-ray source populations and dark matter Galactic and extragalactic structures (and sub-structures) are candidate contributors. The IGRB was measured with unprecedented precision by the Large Area Telescope (LAT) on-board of the Fermi gamma-ray observatory, and these data were used for measuring the IGRB angular power spectrum (APS). Detailed Monte Carlo simulations of Fermi-LAT all-sky observations were performed to provide a reference against which to compare the results obtained for the real data set. The Monte Carlo simulations are also a method for performing those detailed studies of the APS contributions of single source populations, which are required in order to identify the actual IGRB contributors. We present preliminary results of an anisotropy search in the IGRB. At angular scales <2deg (e.g. above multipole 155), angular power above the photon noise level is detected, at energies between 1 and 10 GeV in each energy bin, with statistical significance between 7.2 and 4.1 sigmas. The energy not dependence of the fluctuation anisotropy is pointing to the presence of one or more unclustered source populations, while the energy dependence of the intensity anisotropy is consistent with source populations having average photon index 2.40\pm0.07., Comment: 6 pages, Proceedings of the RICAP 2011 Conference, submitted to NIM A

Published
2011
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5. A luminosity constraint on the origin of unidentified high energy sources

Author

Siegal-Gaskins, J. M., Pavlidou, V., Olinto, A. V., Brown, C., and Fields, B. D.

Subjects
Astrophysics
Abstract

The identification of point sources poses a great challenge for the high energy community. We present a new approach to evaluate the likelihood of a set of sources being a Galactic population based on the simple assumption that galaxies similar to the Milky Way host comparable populations of gamma-ray emitters. We propose a luminosity constraint on Galactic source populations which complements existing approaches by constraining the abundance and spatial distribution of any objects of Galactic origin, rather than focusing on the properties of a specific candidate emitter. We use M31 as a proxy for the Milky Way, and demonstrate this technique by applying it to the unidentified EGRET sources. We find that it is highly improbable that the majority of the unidentified EGRET sources are members of a Galactic halo population (e.g., dark matter subhalos), but that current observations do not provide any constraints on all of these sources being Galactic objects if they reside entirely in the disk and bulge. Applying this method to upcoming observations by the Fermi Gamma-ray Space Telescope has the potential to exclude association of an even larger number of unidentified sources with any Galactic source class., Comment: 18 pages, 4 figures, to appear in JPhysG

Published
2007
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6. Unresolved Unidentified Source Contribution to the Gamma-ray Background

Author

Pavlidou, V., Siegal-Gaskins, J. M., Fields, B. D., Olinto, A. V., and Brown, C.

Subjects
Astrophysics
Abstract

The large majority of EGRET point sources remain without an identified low-energy counterpart, and a large fraction of these sources are most likely extragalactic. Whatever the nature of the extragalactic EGRET unidentified sources, faint unresolved objects of the same class must have a contribution to the diffuse extragalactic gamma-ray background (EGRB). Understanding this component of the EGRB, along with other guaranteed contributions from known sources, is essential if we are to use this emission to constrain exotic high-energy physics. Here, we follow an empirical approach to estimate whether a potential contribution of unidentified sources to the EGRB is likely to be important, and we find that it is. Additionally, we show how upcoming GLAST observations of EGRET unidentified sources, as well as of their fainter counterparts, can be combined with GLAST observations of the Galactic and extragalactic diffuse backgrounds to shed light on the nature of the EGRET unidentified sources even without any positional association of such sources with low-energy counterparts., Comment: 11 pages, 5 figures, submitted to ApJ

Published
2007
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7. Unidentified EGRET Sources and the Extragalactic Gamma-Ray Background

Author

Pavlidou, V., Siegal-Gaskins, J. M., Brown, C., Fields, B. D., and Olinto, A. V.

Subjects
Astrophysics
Abstract

The large majority of EGRET point sources remain to this day without an identified low-energy counterpart. Whatever the nature of the EGRET unidentified sources, faint unresolved objects of the same class must have a contribution to the diffuse gamma-ray background: if most unidentified objects are extragalactic, faint unresolved sources of the same class contribute to the background, as a distinct extragalactic population; on the other hand, if most unidentified sources are Galactic, their counterparts in external galaxies will contribute to the unresolved emission from these systems. Understanding this component of the gamma-ray background, along with other guaranteed contributions from known sources, is essential in any attempt to use gamma-ray observations to constrain exotic high-energy physics. Here, we follow an empirical approach to estimate whether a potential contribution of unidentified sources to the extragalactic gamma-ray background is likely to be important, and we find that it is. Additionally, we comment on how the anticipated GLAST measurement of the diffuse gamma-ray background will change, depending on the nature of the majority of these sources., Comment: 6 pages, 3 figures, to appear in proceedings of "The Multi-Messenger Approach to High Energy Gamma-Ray Sources", Barcelona, 4-7 July 2006; comments welcome

Published
2006
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8. Population Studies of the Unidentified EGRET Sources

Author

Siegal-Gaskins, J. M., Pavlidou, V., Olinto, A. V., Brown, C., and Fields, B. D.

Subjects
Astrophysics
Abstract

The third EGRET catalog contains a large number of unidentified sources. This subset of objects is expected to include known gamma-ray emitters of Galactic origin such as pulsars and supernova remnants, in addition to an extragalactic population of blazars. However, current data allows the intriguing possibility that some of these objects may represent a new class of yet undiscovered gamma-ray sources. Many theoretically motivated candidate emitters (e.g. clumps of annihilating dark matter particles) have been suggested to account for these detections. We take a new approach to determine to what extent this population is Galactic and to investigate the nature of the possible Galactic component. By assuming that galaxies similar to the Milky Way should host comparable populations of objects, we constrain the allowed Galactic abundance and distribution of various classes of gamma-ray sources using the EGRET data set. We find it is highly improbable that a large number of the unidentified sources are members of a Galactic halo population, but that a distribution of the sources entirely in the disk and bulge is plausible. Finally, we discuss the additional constraints and new insights that GLAST will provide., Comment: 6 pages, 2 figures, to appear in proceedings of "The Multi-Messenger Approach to High Energy Gamma-Ray Sources", Barcelona, 4-7 July, 2006; comments welcome

Published
2006
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9. Search for gamma-ray spectral lines with the Fermi Large Area Telescope and dark matter implications

Author

Ackermann, Markus, Ajello, M., Bloom, E. D., Orlando, E., Ormes, J. F., Paneque, D., Perkins, J. S., Pesce-Rollins, M., Piron, F., Pivato, G., Rainò, S., Rando, R., Razzano, M., Bonamente, E., Razzaque, S., Reimer, A., Reimer, O., Romani, R. W., Sánchez-Conde, M., Schulz, A., Sgrò, C., Siegal-Gaskins, J., Siskind, E. J., Snyder, A., Bottacini, E., Spandre, G., Spinelli, P., Suson, D. J., Tajima, H., Takahashi, H., Thayer, J. G., Thayer, J. B., Tibaldo, L., Tinivella, M., Tosti, G., Brandt, T. J., Troja, E., Uchiyama, Y., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vitale, V., Winer, B. L., Wood, K. S., Wood, M., Bregeon, J., Yang, Z., Zaharijas, G., Zimmer, S., Fermi-LAT Collaboration, Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Albert, A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cecchi, C., Charles, E., Chaves, R. C. G., Chekhtman, A., Chiang, J., Ciprini, S., Claus, R., Allafort, A., Cohen-Tanugi, J., Conrad, J., Cutini, S., D’Ammando, F., de Angelis, A., de Palma, F., Dermer, C. D., Digel, S. W., Di Venere, L., Drell, P. S., Baldini, L., Drlica-Wagner, A., Essig, R., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Focke, W. B., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Barbiellini, G., Gargano, F., Gasparrini, D., Germani, S., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Gomez-Vargas, G. A., Grenier, I. A., Bastieri, D., Guiriec, S., Gustafsson, M., Hadasch, D., Hayashida, M., Hill, A. B., Horan, D., Hou, X., Hughes, R. E., Inoue, Y., Izaguirre, E., Bechtol, K., Jogler, T., Kamae, T., Knödlseder, J., Kuss, M., Lande, J., Larsson, S., Latronico, L., Longo, F., Loparco, F., Lovellette, M. N., Bellazzini, R., Lubrano, P., Malyshev, D., Mayer, Michael, Mazziotta, M. N., McEnery, J. E., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., Monzani, M. E., Bissaldi, E., Morselli, A., Moskalenko, I. V., Murgia, S., Nakamori, T., Nemmen, R., Nuss, E., Ohsugi, T., Okumura, A., Omodei, N., Orienti, M., UAM. Departamento de Física Teórica, Ackermann M, Ajello M, Albert A, Allafort A, Baldini L, Barbiellini G, Bastieri D, Bechtol K, Bellazzini R, Bissaldi E, Bloom ED, Bonamente E, Bottacini E, Brandt TJ, Bregeon J, Brigida M, Bruel P, Buehler R, Buson S, Caliandro GA, Cameron RA, Caraveo PA, Casandjian JM, Cecchi C, Charles E, Chaves RCG, Chekhtman A, Chiang J, Ciprini S, Claus R, Cohen-Tanugi J, Conrad J, Cutini S, DAmmando F, de Angelis A, de Palma F, Dermer CD, Digel SW, Di Venere L, Drell PS, Drlica-Wagner A, Essig R, Favuzzi C, Fegan SJ, Ferrara EC, Focke WB, Franckowiak A, Fukazawa Y, Funk S, Fusco P, Gargano F, Gasparrini D, Germani S, Giglietto N, Giordano F, Giroletti M, Glanzman T, Godfrey G, Gomez-Vargas GA, Grenier IA, Guiriec S, Gustafsson M, Hadasch D, Hayashida M, Hill AB, Horan D, Hou X, Hughes RE, Inoue Y, Izaguirre E, Jogler T, Kamae T, Knodlseder J, Kuss M, Lande J, Larsson S, Latronico L, Longo F, Loparco F, Lovellette MN, Lubrano P, Malyshev D, Mayer M, Mazziotta MN, McEnery JE, Michelson PF, Mitthumsiri W, Mizuno T, Moiseev AA, Monzani ME, Morselli A, Moskalenko IV, Murgia S, Nakamori T, Nemmen R, Nuss E, Ohsugi T, Okumura A, Omodei N, Orienti M, Orlando E, Ormes JF, Paneque D, Perkins JS, Pesce-Rollins M, Piron F, Pivato G, Raino S, Rando R, Razzano M, Razzaque S, Reimer A, Reimer O, Romani RW, Sanchez-Conde M, Schulz A, Sgro C, Siegal-Gaskins J, Siskind EJ, Snyder A, Spandre G, Spinelli P, Suson DJ, Tajima H, Takahashi H, Thayer JG, Thayer JB, Tibaldo L, Tinivella M, Tosti G, Troja E, Uchiyama Y, Usher TL, Vandenbroucke J, Vasileiou V, Vianello G, Vitale V, Winer BL, Wood KS, Wood M, Yang Z, Zaharijas G, Zimmer S, Ackermann, M., Ajello, M., Albert, A., Allafort, A., Baldini, L., BARBIELLINI AMIDEI, Guido, Bastieri, D., Bechtol, K., Bellazzini, R., Bissaldi, Elisabetta, Bloom, E. D., Bonamente, E., Bottacini, E., Brandt, T. J., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cecchi, C., Charles, E., R. C. G., Chekhtman, A., Chiang, J., Ciprini, S., Claus, R., Cohen Tanugi, J., Conrad, J., Cutini, S., D'Ammando, F., Angelis, A. d., Palma, F. d., Dermer, C. D., Digel, S. W., Venere, L. D., Drell, P. S., Drlica Wagner, A., Essig, R., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Focke, W. B., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Germani, S., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Gomez Vargas, G. A., Grenier, I. A., Guiriec, S., Gustafsson, M., Hadasch, D., Hayashida, M., Hill, A. B., Horan, D., Hou, X., Hughes, R. E., Inoue, Y., Izaguirre, E., Jogler, T., Kamae, T., Knoedlseder, J., Kuss, M., Lande, J., Larsson, S., Latronico, L., Longo, Francesco, Loparco, F., Lovellette, M. N., Lubrano, P., Malyshev, D., Mayer, M., Mazziotta, M. N., Mcenery, J. E., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Nakamori, T., Nemmen, R., Nuss, E., Ohsugi, T., Okumura, A., Omodei, N., Orienti, M., Orlando, E., Ormes, J. F., Paneque, D., Perkins, J. S., Pesce Rollins, M., Piron, F., Pivato, G., Raino, S., Rando, R., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Romani, R. W., Sanchez Conde, M., Schulz, A., Sgro, C., Siegal Gaskins, J., Siskind, E. J., Snyder, A., Spandre, G., Spinelli, P., Suson, D. J., Tajima, H., Takahashi, H., Thayer, J. G., Thayer, J. B., Tibaldo, L., Tinivella, M., Tosti, G., Troja, E., Uchiyama, Y., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vitale, V., Winer, B. L., Wood, K. S., Wood, M., Yang, Z., Zaharijas, G., and Zimmer, S.

Subjects
Nuclear and High Energy Physics, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, Elementary particle processe, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, dark matter, Elementary particle processes, Galactic halo, 01 natural sciences, Spectral line, WIMP, 0103 physical sciences, ddc:530, 010306 general physics, Physics, Annihilation, 010308 nuclear & particles physics, Gamma ray, Física, Dark matter, Elementary particle processes, Galactic halo, Galaxy, Weakly interacting massive particles, High Energy Physics::Experiment, Astrophysics - High Energy Astrophysical Phenomena, Fermi Gamma-ray Space Telescope
Abstract

Physical review / D 88(8), 082002 (2013). doi:10.1103/PhysRevD.88.082002, Weakly interacting massive particles (WIMPs) are a theoretical class of particles that are excellent dark matter candidates. WIMP annihilation or decay may produce essentially monochromatic γ rays detectable by the Fermi Large Area Telescope (LAT) against the astrophysical γ-ray emission of the Galaxy. We have searched for spectral lines in the energy range 5–300 GeV using 3.7 years of data, reprocessed with updated instrument calibrations and an improved energy dispersion model compared to the previous Fermi-LAT Collaboration line searches. We searched in five regions selected to optimize sensitivity to different theoretically motivated dark matter density distributions. We did not find any globally significant lines in our a priori search regions and present 95% confidence limits for annihilation cross sections of self-conjugate WIMPs and decay lifetimes. Our most significant fit occurred at 133 GeV in our smallest search region and had a local significance of 3.3 standard deviations, which translates to a global significance of 1.5 standard deviations. We discuss potential systematic effects in this search, and examine the feature at 133 GeV in detail. We find that the use both of reprocessed data and of additional information in the energy dispersion model contributes to the reduction in significance of the linelike feature near 130 GeV relative to significances reported in other works. We also find that the feature is narrower than the LAT energy resolution at the level of 2 to 3 standard deviations, which somewhat disfavors the interpretation of the 133 GeV feature as a real WIMP signal., Published by Soc., [S.l.]

Published
2013

10. Anisotropies in the diffuse gamma-ray background measured by the Fermi LAT (vol 85, 083007, 2012)

Author

Ackermann, M., Ajello, M., Albert, A., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Bloom, E. D., Bonamente, E., Borgland, A. W., Brandt, T. J., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Cecchi, C., Charles, E., Chekhtman, A., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Cuoco, A., Cutini, S., D'Ammando, F., de Palma, F., Dermer, C. D., Digel, S. W., do Couto e Silva, E., Drell, P. S., Drlica-Wagner, A., Dubois, R., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Fortin, P., Fukazawa, Y., Fusco, P., Gargano, F., Gasparrini, D., Germani, S., Giglietto, N., Giroletti, M., Glanzman, T., Godfrey, G., Gomez-Vargas, G. A., Gregoire, T., Grenier, I. A., Grove, J. E., Guiriec, S., Gustafsson, M., Hadasch, D., Hayashida, M., Hayashi, K., Hou, X., Hughes, R. E., Johannesson, G., Johnson, A. S., Kamae, T., Knoedlseder, J., Kuss, M., Lande, J., Latronico, L., Lemoine-Goumard, M., Linden, T., Lionetto, A. M., Llena, Garde M., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Mazziotta, M. N., Mcenery, J. E., Mitthumsiri, W., Mizuno, T., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Naumann-Godo, M., Norris, J. P., Nuss, E., Ohsugi, T., Okumura, A., Orienti, M., Orlando, E, Ormes, J. F., Paneque, D., Panetta, J. H., Parent, D., Pavlidou, V., Pesce-Rollins, M., Pierbattista, M., Piron, F., Pivato, G., Raino, S., Rando, R., Reimer, A., Reimer, O., Roth, M., Sbarra, C., Schmitt, J., Sgro, C., Siegal-Gaskins, J., Siskind, E. J., Spandre, G., Spinelli, P., Strong, A. W., Suson, D. J., Takahashi, H., Tanaka, T., Thayer, J. B., Tibaldo, L., Tinivella, M., Torres, D. F., Tosti, G., Troja, E., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vitale, V., Waite, A. P., Winer, B. L., Wood, K. S., Wood, M., Yang, Z., Zimmer, S., Komatsu, E., Ackermann, M., Ajello, M., Albert, A., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Bloom, E. D., Bonamente, E., Borgland, A. W., Brandt, T. J., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Cecchi, C., Charles, E., Chekhtman, A., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Cuoco, A., Cutini, S., D'Ammando, F., de Palma, F., Dermer, C. D., Digel, S. W., do Couto e Silva, E., Drell, P. S., Drlica-Wagner, A., Dubois, R., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Fortin, P., Fukazawa, Y., Fusco, P., Gargano, F., Gasparrini, D., Germani, S., Giglietto, N., Giroletti, M., Glanzman, T., Godfrey, G., Gomez-Vargas, G. A., Gregoire, T., Grenier, I. A., Grove, J. E., Guiriec, S., Gustafsson, M., Hadasch, D., Hayashida, M., Hayashi, K., Hou, X., Hughes, R. E., Johannesson, G., Johnson, A. S., Kamae, T., Knoedlseder, J., Kuss, M., Lande, J., Latronico, L., Lemoine-Goumard, M., Linden, T., Lionetto, A. M., Garde M., Llena, Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Mazziotta, M. N., Mcenery, J. E., Mitthumsiri, W., Mizuno, T., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Naumann-Godo, M., Norris, J. P., Nuss, E., Ohsugi, T., Okumura, A., Orienti, M., Orlando, E, Ormes, J. F., Paneque, D., Panetta, J. H., Parent, D., Pavlidou, V., Pesce-Rollins, M., Pierbattista, M., Piron, F., Pivato, G., Raino, S., Rando, R., Reimer, A., Reimer, O., Roth, M., Sbarra, C., Schmitt, J., Sgro, C., Siegal-Gaskins, J., Siskind, E. J., Spandre, G., Spinelli, P., Strong, A. W., Suson, D. J., Takahashi, H., Tanaka, T., Thayer, J. B., Tibaldo, L., Tinivella, M., Torres, D. F., Tosti, G., Troja, E., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vitale, V., Waite, A. P., Winer, B. L., Wood, K. S., Wood, M., Yang, Z., Zimmer, S., and Komatsu, E.

Published
2012

11. The Fermi Large Area Telescope on Orbit: Event Classification, Instrument Response Functions

Author

Ackermann, M., Ajello, M., Albert, A., Allafort, A., Atwood, W. B., Axelsson, M., Baldini, Luca, Ballet, J., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Bissaldi, E., Blandford, R. D., Bloom, E. D., Bogart, J. R., Bonamente, E., Borgland, A. W., Bottacini, E., Bouvier, A., Brandt, T. J., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Burnett, T. H., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Çelik, Ö., Charles, E., Chaves, R. C. G., Chekhtman, A., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen Tanugi, J., Conrad, J., Corbet, R., Cutini, S., D’Ammando, F., Davis, D. S., de Angelis, A., Deklotz, M., de Palma, F., Dermer, C. D., Digel, S. W., Silva, E. do Couto e., Drell, P. 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., Giebels, B., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grenier, I. A., Grove, J. E., Guiriec, S., Hadasch, D., Hayashida, M., Hays, E., Horan, D., Hou, X., Hughes, R. E., Jackson, M. S., Jogler, T., Jóhannesson, G., Johnson, R. P., Johnson, T. J., Johnson, W. N., Kamae, T., Katagiri, H., Kataoka, J., Kerr, M., Knödlseder, J., Kuss, M., Lande, J., Larsson, S., Latronico, L., Lavalley, C., Lemoine Goumard, M., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Mazziotta, M. N., Mcconville, W., Mcenery, J. E., Mehault, J., Michelson, P. F., 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., Ohno, M., Ohsugi, T., Okumura, A., Omodei, N., Orienti, M., Orlando, E., Ormes, J. F., Paneque, D., Panetta, J. H., Perkins, J. S., Pesce Rollins, M., Pierbattista, M., Piron, F., Pivato, G., Porter, T. A., Racusin, J. L., Rainò, S., Rando, R., Razzano, Massimiliano, Razzaque, S., Reimer, A., Reimer, O., Reposeur, T., Reyes, L. C., Ritz, S., Rochester, L. S., Romoli, C., Roth, M., Sadrozinski, H. F. W., Sanchez, D. A., Saz Parkinson, P. M., Sbarra, C., Scargle, J. D., Sgrò, C., Siegal Gaskins, J., Siskind, E. J., 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., Tinivella, Marco, Tosti, G., Troja, E., Usher, T. L., Vandenbroucke, J., Van Klaveren, B., Vasileiou, V., Vianello, G., Vitale, V., Waite, A. P., Wallace, E., Winer, B. L., Wood, D. L., Wood, K. S., Wood, M., Yang, Z., and Zimmer, S.

Subjects
instrumentation: miscellaneous, instrumentation: detectors, telescopes, methods: observational, methods: data analysis
Published
2012

12. Erratum: Anisotropies in the diffuse gamma-ray background measured by the Fermi LAT (Physical Review D - Particles, Fields, Gravitation and Cosmology)

Author

Ackermann, M, Ajello, M., Albert, A., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Bloom, E. D., Bonamente, Emanuele, Borgland, A. W., Brandt, T. J., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Cecchi, Claudia, Charles, E., Chekhtman, A., Chiang, J., Ciprini, S., Claus, R., Cohen Tanugi, J., Conrad, J., Cuoco, A., Cutini, S., D'Ammando, F., De Palma, F., Dermer, C. D., Digel, S. W., Do Couto E. Silva, E., Drell, P. S., Drlica Wagner, A., Dubois, R., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Fortin, P., Fukazawa, Y., Fusco, P., Gargano, F., Gasparrini, D., Germani, S., Giglietto, N., Giroletti, M., Glanzman, T., Godfrey, G., Gomez Vargas, G. A., Grégoire, T., Grenier, I. A., Grove, J. E., Guiriec, S., Gustafsson, M., Hadasch, D., Hayashida, M., Hayashi, K., Hou, X., Hughes, R. E., Jóhannesson, G., Johnson, A. S., Kamae, T., Knödlseder, J., Kuss, M., Lande, J., Latronico, L., Lemoine Goumard, M., Linden, T., Lionetto, A. M., Llena Garde, M., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Mazziotta, M. N., Mcenery, J. E., Mitthumsiri, W., Mizuno, T., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Naumann Godo, M., Norris, J. P., Nuss, E., Ohsugi, T., Okumura, A., Orienti, M., Orlando, E., Ormes, J. F., Paneque, D., Panetta, J. H., Parent, D., Pavlidou, V., Pesce Rollins, M., Pierbattista, M., Piron, F., Pivato, G., Rainò, S., Rando, R., Reimer, A., Reimer, O., Roth, M., Sbarra, C., Schmitt, J., Sgrò, C., Siegal Gaskins, J., Siskind, E. J., Spandre, G., Spinelli, P., Strong, A. W., Suson, D. J., Takahashi, H., Tanaka, T., Thayer, J. B., Tibaldo, L., Tinivella, M., Torres, D. F., Tosti, Gino, Troja, E., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vitale, V., Waite, A. P., Winer, B. L., Wood, K. S., Wood, M., Yang, Z., Zimmer, S., and Komatsu, E.

Subjects
Nuclear and High Energy Physics
Published
2012

13. Publisher's Note: Anisotropies in the diffuse gamma-ray background measured by the Fermi LAT [Phys. Rev. D 85, 083007 (2012)]

Author

Ackermann, M., Ajello, M., Albert, A., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Bloom, E. D., Bonamente, Emanuele, Borgland, A. W., Brandt, T. J., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Cecchi, Claudia, Charles, E., Chekhtman, A., Chiang, J., Ciprini, S., Claus, R., Cohen Tanugi, J., Conrad, J., Cuoco, A., Cutini, S., D'Ammando, F., Palma, F. d., Dermer, C. D., Digel, S. W., Couto, E. d., Drell, P. S., Drlica Wagner, A., Dubois, R., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Fortin, P., Fukazawa, Y., Fusco, P., Gargano, F., Gasparrini, D., Germani, S., Giglietto, N., Giroletti, M., Glanzman, T., Godfrey, G., Gomez Vargas, G. A., Grégoire, T., Grenier, I. A., Grove, J. E., Guiriec, S., Gustafsson, M., Hadasch, D., Hayashida, M., Hayashi, K., Hou, X., Hughes, R. E., Jóhannesson, G., Johnson, A. S., Kamae, T., Knödlseder, J., Kuss, M., Lande, J., Latronico, L., Lemoine Goumard, M., Linden, T., Lionetto, A. M., Garde, M. L., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Mazziotta, M. N., Mcenery, J. E., Mitthumsiri, W., Mizuno, T., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Naumann Godo, M., Norris, J. P., Nuss, E., Ohsugi, T., Okumura, A., Orienti, M., Orlando, E., Ormes, J. F., Paneque, D., Panetta, J. H., Parent, D., Pavlidou, V., Pesce Rollins, M., Pierbattista, M., Piron, F., Pivato, G., Rainò, S., Rando, R., Reimer, A., Reimer, O., Roth, M., Sbarra, C., Schmitt, J., Sgrò, C., Siegal Gaskins, J., Siskind, E. J., Spandre, G., Spinelli, P., Strong, A. W., Suson, D. J., Takahashi, H., Tanaka, T., Thayer, J. B., Tibaldo, L., Tinivella, M., Torres, D. F., Tosti, Gino, Troja, E., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vitale, V., Waite, A. P., Winer, B. L., Wood, K. S., Wood, M., Yang, Z., Zimmer, S., and Komatsu, E.

Subjects
Background radiations, gamma-ray, gamma-ray sources, gamma-ray bursts, Publisher's note
Published
2012

14. Dark matter implications of Fermi-LAT measurement of anisotropies in the diffuse gamma-ray background

Author

Gomez-Vargas, G. A., Cuoco, Alessandro, Linden, T., Sanchez-Conde, M. A., Siegal-Gaskins, J. M., Delahaye, T., Fornasa, M., Komatsu, E., Prada, F., Zavala, J., Gomez-Vargas, G. A., Cuoco, Alessandro, Linden, T., Sanchez-Conde, M. A., Siegal-Gaskins, J. M., Delahaye, T., Fornasa, M., Komatsu, E., Prada, F., and Zavala, J.

Abstract

The detailed origin of the diffuse gamma-ray background is still unknown. However, the contribution of unresolved sources is expected to induce small-scale anisotropies in this emission, which may provide a way to identify and constrain the properties of its contributors. Recent studies have predicted the contributions to the angular power spectrum (APS) from extragalactic and galactic dark matter (DM) annihilation or decay. The Fermi-LAT collaboration reported detection of angular power with a significance larger than 3 sigma in the energy range from 1 GeV to 10 GeV on 22 months of data (Ackermann et al., 2012 [2]). For these preliminary results the already published Fermi-LAT APS measurements (Ackermann et al., 2012 [2]) are compared to the accurate predictions for DM anisotropies from state-of-the-art cosmological simulations as presented in Fornasa et at (2013) [1] to derive constraints on different DM candidates., AuthorCount:10

Published
2014
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15. Search for gamma-ray spectral lines with the Fermi Large Area Telescope and dark matter implications

Author

Ackermann, M., Ajello, M., Albert, A., Allafort, A., Baldini, L., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Bissaldi, E., Bloom, E. D., Bonamente, E., Bottacini, E., Brandt, T. J., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cecchi, C., Charles, E., Chaves, R. C. G., Chekhtman, A., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, Jan, Cutini, S., D'Ammando, F., de Angelis, A., de Palma, F., Dermer, C. D., Digel, S. W., Di Venere, L., Drell, P. S., Drlica-Wagner, A., Essig, R., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Focke, W. B., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Germani, S., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Gomez-Vargas, G. A., Grenier, I. A., Guiriec, S., Gustafsson, M., Hadasch, D., Hayashida, M., Hill, A. B., Horan, D., Hou, X., Hughes, R. E., Inoue, Y., Izaguirre, E., Jogler, T., Kamae, T., Knoedlseder, J., Kuss, M., Lande, J., Larsson, Stefan, Latronico, L., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Malyshev, D., Mayer, M., Mazziotta, M. N., McEnery, J. E., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Nakamori, T., Nemmen, R., Nuss, E., Ohsugi, T., Okumura, A., Omodei, N., Orienti, M., Orlando, E., Ormes, J. F., Paneque, D., Perkins, J. S., Pesce-Rollins, M., Piron, F., Pivato, G., Raino, S., Rando, R., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Romani, R. W., Sanchez-Conde, M., Schulz, A., Sgro, C., Siegal-Gaskins, J., Siskind, E. J., Snyder, A., Spandre, G., Spinelli, P., Suson, D. J., Tajima, H., Takahashi, H., Thayer, J. G., Thayer, J. B., Tibaldo, L., Tinivella, M., Tosti, G., Troja, E., Uchiyama, Y., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vitale, V., Winer, B. L., Wood, K. S., Wood, M., Yang, Zhaoyu, Zaharijas, G., Zimmer, Stephan, Ackermann, M., Ajello, M., Albert, A., Allafort, A., Baldini, L., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Bissaldi, E., Bloom, E. D., Bonamente, E., Bottacini, E., Brandt, T. J., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cecchi, C., Charles, E., Chaves, R. C. G., Chekhtman, A., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, Jan, Cutini, S., D'Ammando, F., de Angelis, A., de Palma, F., Dermer, C. D., Digel, S. W., Di Venere, L., Drell, P. S., Drlica-Wagner, A., Essig, R., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Focke, W. B., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Germani, S., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Gomez-Vargas, G. A., Grenier, I. A., Guiriec, S., Gustafsson, M., Hadasch, D., Hayashida, M., Hill, A. B., Horan, D., Hou, X., Hughes, R. E., Inoue, Y., Izaguirre, E., Jogler, T., Kamae, T., Knoedlseder, J., Kuss, M., Lande, J., Larsson, Stefan, Latronico, L., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Malyshev, D., Mayer, M., Mazziotta, M. N., McEnery, J. E., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Nakamori, T., Nemmen, R., Nuss, E., Ohsugi, T., Okumura, A., Omodei, N., Orienti, M., Orlando, E., Ormes, J. F., Paneque, D., Perkins, J. S., Pesce-Rollins, M., Piron, F., Pivato, G., Raino, S., Rando, R., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Romani, R. W., Sanchez-Conde, M., Schulz, A., Sgro, C., Siegal-Gaskins, J., Siskind, E. J., Snyder, A., Spandre, G., Spinelli, P., Suson, D. J., Tajima, H., Takahashi, H., Thayer, J. G., Thayer, J. B., Tibaldo, L., Tinivella, M., Tosti, G., Troja, E., Uchiyama, Y., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vitale, V., Winer, B. L., Wood, K. S., Wood, M., Yang, Zhaoyu, Zaharijas, G., and Zimmer, Stephan

Abstract

Weakly interacting massive particles (WIMPs) are a theoretical class of particles that are excellent dark matter candidates. WIMP annihilation or decay may produce essentially monochromatic gamma rays detectable by the Fermi Large Area Telescope (LAT) against the astrophysical gamma-ray emission of the Galaxy. We have searched for spectral lines in the energy range 5-300 GeV using 3.7 years of data, reprocessed with updated instrument calibrations and an improved energy dispersion model compared to the previous Fermi-LAT Collaboration line searches. We searched in five regions selected to optimize sensitivity to different theoretically motivated dark matter density distributions. We did not find any globally significant lines in our a priori search regions and present 95% confidence limits for annihilation cross sections of self-conjugate WIMPs and decay lifetimes. Our most significant fit occurred at 133 GeV in our smallest search region and had a local significance of 3.3 standard deviations, which translates to a global significance of 1.5 standard deviations. We discuss potential systematic effects in this search, and examine the feature at 133 GeV in detail. We find that the use both of reprocessed data and of additional, AuthorCount:143

Published
2013
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16. The fermi large area telescope on orbit : Event classification, instrument response functions, and calibration

Author

Ackermann, M., Ajello, M., Albert, A., Allafort, A., Atwood, W. B., Axelsson, Magnus, Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Bissaldi, E., Blandford, R. D., Bloom, E. D., Bogart, J. R., Bonamente, E., Borgland, A. W., Bottacini, E., Bouvier, A., Brandt, T. J., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Burnett, T. H., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Çelik, Ö., Charles, E., Chaves, R. C. G., Chekhtman, A., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Corbet, R., Cutini, S., D'Ammando, F., Davis, D. S., De Angelis, A., Deklotz, M., De Palma, F., Dermer, C. D., Digel, S. W., Do Couto E Silva, E., Drell, P. 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., Giebels, B., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grenier, I. A., Grove, J. E., Guiriec, S., Hadasch, D., Hayashida, M., Hays, E., Horan, D., Hou, X., Hughes, R. E., Jackson, Miranda S., Jogler, T., Jóhannesson, G., Johnson, R. P., Johnson, T. J., Johnson, W. N., Kamae, T., Katagiri, H., Kataoka, J., Kerr, M., Knödlseder, J., Kuss, M., Lande, J., Larsson, S., Latronico, L., Lavalley, C., Lemoine-Goumard, M., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Mazziotta, M. N., McConville, W., McEnery, J. E., Mehault, J., Michelson, P. F., 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., Ohno, M., Ohsugi, T., Okumura, A., Omodei, N., Orienti, M., Orlando, E., Ormes, J. F., Paneque, D., Panetta, J. H., Perkins, J. S., Pesce-Rollins, M., Pierbattista, M., Piron, F., Pivato, G., Porter, T. A., Racusin, J. L., Rainò, S., Rando, R., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Reposeur, T., Reyes, L. C., Ritz, S., Rochester, L. S., Romoli, C., Roth, M., Sadrozinski, H. F. -W, Sanchez, D. A., Saz Parkinson, P. M., Sbarra, C., Scargle, J. D., Sgrò, C., Siegal-Gaskins, J., Siskind, E. J., 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., Tinivella, M., Tosti, G., Troja, E., Usher, T. L., Vandenbroucke, J., Van Klaveren, B., Vasileiou, V., Vianello, G., Vitale, V., Waite, A. P., Wallace, E., Winer, B. L., Wood, D. L., Wood, K. S., Wood, M., Yang, Z., Zimmer, S., Ackermann, M., Ajello, M., Albert, A., Allafort, A., Atwood, W. B., Axelsson, Magnus, Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Bissaldi, E., Blandford, R. D., Bloom, E. D., Bogart, J. R., Bonamente, E., Borgland, A. W., Bottacini, E., Bouvier, A., Brandt, T. J., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Burnett, T. H., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Çelik, Ö., Charles, E., Chaves, R. C. G., Chekhtman, A., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Corbet, R., Cutini, S., D'Ammando, F., Davis, D. S., De Angelis, A., Deklotz, M., De Palma, F., Dermer, C. D., Digel, S. W., Do Couto E Silva, E., Drell, P. 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., Giebels, B., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grenier, I. A., Grove, J. E., Guiriec, S., Hadasch, D., Hayashida, M., Hays, E., Horan, D., Hou, X., Hughes, R. E., Jackson, Miranda S., Jogler, T., Jóhannesson, G., Johnson, R. P., Johnson, T. J., Johnson, W. N., Kamae, T., Katagiri, H., Kataoka, J., Kerr, M., Knödlseder, J., Kuss, M., Lande, J., Larsson, S., Latronico, L., Lavalley, C., Lemoine-Goumard, M., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Mazziotta, M. N., McConville, W., McEnery, J. E., Mehault, J., Michelson, P. F., 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., Ohno, M., Ohsugi, T., Okumura, A., Omodei, N., Orienti, M., Orlando, E., Ormes, J. F., Paneque, D., Panetta, J. H., Perkins, J. S., Pesce-Rollins, M., Pierbattista, M., Piron, F., Pivato, G., Porter, T. A., Racusin, J. L., Rainò, S., Rando, R., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Reposeur, T., Reyes, L. C., Ritz, S., Rochester, L. S., Romoli, C., Roth, M., Sadrozinski, H. F. -W, Sanchez, D. A., Saz Parkinson, P. M., Sbarra, C., Scargle, J. D., Sgrò, C., Siegal-Gaskins, J., Siskind, E. J., 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., Tinivella, M., Tosti, G., Troja, E., Usher, T. L., Vandenbroucke, J., Van Klaveren, B., Vasileiou, V., Vianello, G., Vitale, V., Waite, A. P., Wallace, E., Winer, B. L., Wood, D. L., Wood, K. S., Wood, M., Yang, Z., and Zimmer, S.

Abstract

The Fermi Large Area Telescope (Fermi-LAT, hereafter LAT), the primary instrument on the Fermi Gamma-ray Space Telescope (Fermi) mission, is an imaging, wide field-of-view, high-energy γ-ray telescope, covering the energy range from 20MeV to more than 300GeV. During the first years of the mission, the LAT team has gained considerable insight into the in-flight performance of the instrument. Accordingly, we have updated the analysis used to reduce LAT data for public release as well as the instrument response functions (IRFs), the description of the instrument performance provided for data analysis. In this paper, we describe the effects that motivated these updates. Furthermore, we discuss how we originally derived IRFs from Monte Carlo simulations and later corrected those IRFs for discrepancies observed between flight and simulated data. We also give details of the validations performed using flight data and quantify the residual uncertainties in the IRFs. Finally, we describe techniques the LAT team has developed to propagate those uncertainties into estimates of the systematic errors on common measurements such as fluxes and spectra of astrophysical sources., QC 20121119

Published
2012
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17. Joint anisotropy and source count constraints on the contribution of blazars to the diffuse gamma-ray background

Author

Cuoco, Alessandro, Komatsu, E., Siegal-Gaskins, J. M., Cuoco, Alessandro, Komatsu, E., and Siegal-Gaskins, J. M.

Abstract

We place new constraints on the contribution of blazars to the large-scale isotropic gamma-ray background (IGRB) by jointly analyzing the measured source count distribution (logN-logS) of blazars and the measured intensity and anisotropy of the IGRB. We find that these measurements point to a consistent scenario in which unresolved blazars make less than or similar to 20% of the IGRB intensity at 1-10 GeV while accounting for the majority of the measured anisotropy in that energy band. These results indicate that the remaining fraction of the IGRB intensity is made by a component with a low level of intrinsic anisotropy. We determine upper limits on the anisotropy from nonblazar sources, adopting the best-fit parameters of the measured source count distribution to calculate the unresolved blazar anisotropy. In addition, we show that the anisotropy measurement excludes some recently proposed models of the unresolved blazar population., AuthorCount:3

Published
2012
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18. Constraints on dark matter models from a Fermi LAT search for high-energy cosmic-ray electrons from the Sun

Author

Ajello, M., Atwood, W. B., Baldini, L., Barbiellini, G., Bastieri, D., Bellazzini, R., Berenji, B., Blandford, R. D., Bloom, E. D., Bonamente, E., Borgland, A. W., Bottacini, E., Bouvier, A., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Cecchi, C., Charles, E., Chekhtman, A., Ciprini, S., Claus, R., Cohen-Tanugi, J., Cutini, S., de Angelis, A., de Palma, F., Dermer, C. D., Digel, S. W., Silva, E. do Couto e, Drell, P. S., Favuzzi, C., Fegan, S. J., Focke, W. B., Fukazawa, Y., Fusco, P., Gargano, F., Gehrels, N., Germani, S., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grenier, I. A., Guiriec, S., Gustafsson, M., Hadasch, D., Iafrate, G., Johannesson, G., Johnson, A. S., Kamae, T., Katagiri, H., Kataoka, J., Kuss, M., Latronico, L., Lionetto, A. M., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Mazziotta, M. N., McEnery, J. E., Michelson, P. F., Mizuno, T., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Naumann-Godo, M., Norris, J. P., Nuss, E., Ohsugi, T., Omodei, N., Orlando, E., Ormes, J. F., Ozaki, M., Paneque, D., Panetta, J. H., Pesce-Rollins, M., Pierbattista, M., Piron, F., Raino, S., Rando, R., Razzano, M., Reimer, A., Reimer, O., Ritz, S., Schalk, T. L., Sgro, C., Siegal-Gaskins, J., Siskind, E. J., Smith, P. D., Spandre, G., Spinelli, P., Suson, D. J., Takahashi, H., Tanaka, T., Thayer, J. G., Thayer, J. B., Tibaldo, L., Tosti, G., Troja, E., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vilchez, N., Waite, A. P., Wang, P., Winer, B. L., Wood, K. S., Yang, Zhaoyu, Zimmer, Stephen, Ajello, M., Atwood, W. B., Baldini, L., Barbiellini, G., Bastieri, D., Bellazzini, R., Berenji, B., Blandford, R. D., Bloom, E. D., Bonamente, E., Borgland, A. W., Bottacini, E., Bouvier, A., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Cecchi, C., Charles, E., Chekhtman, A., Ciprini, S., Claus, R., Cohen-Tanugi, J., Cutini, S., de Angelis, A., de Palma, F., Dermer, C. D., Digel, S. W., Silva, E. do Couto e, Drell, P. S., Favuzzi, C., Fegan, S. J., Focke, W. B., Fukazawa, Y., Fusco, P., Gargano, F., Gehrels, N., Germani, S., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grenier, I. A., Guiriec, S., Gustafsson, M., Hadasch, D., Iafrate, G., Johannesson, G., Johnson, A. S., Kamae, T., Katagiri, H., Kataoka, J., Kuss, M., Latronico, L., Lionetto, A. M., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Mazziotta, M. N., McEnery, J. E., Michelson, P. F., Mizuno, T., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Naumann-Godo, M., Norris, J. P., Nuss, E., Ohsugi, T., Omodei, N., Orlando, E., Ormes, J. F., Ozaki, M., Paneque, D., Panetta, J. H., Pesce-Rollins, M., Pierbattista, M., Piron, F., Raino, S., Rando, R., Razzano, M., Reimer, A., Reimer, O., Ritz, S., Schalk, T. L., Sgro, C., Siegal-Gaskins, J., Siskind, E. J., Smith, P. D., Spandre, G., Spinelli, P., Suson, D. J., Takahashi, H., Tanaka, T., Thayer, J. G., Thayer, J. B., Tibaldo, L., Tosti, G., Troja, E., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vilchez, N., Waite, A. P., Wang, P., Winer, B. L., Wood, K. S., Yang, Zhaoyu, and Zimmer, Stephen

Abstract

During its first year of data taking, the Large Area Telescope (LAT) onboard the Fermi Gamma-Ray Space Telescope has collected a large sample of high-energy cosmic-ray electrons and positrons (CREs). We present the results of a directional analysis of the CRE events, in which we searched for a flux excess correlated with the direction of the Sun. Two different and complementary analysis approaches were implemented, and neither yielded evidence of a significant CRE flux excess from the Sun. We derive upper limits on the CRE flux from the Sun's direction, and use these bounds to constrain two classes of dark matter models which predict a solar CRE flux: (1) models in which dark matter annihilates to CREs via a light intermediate state, and (2) inelastic dark matter models in which dark matter annihilates to CREs., authorCount :118

Published
2011
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19. Searches for cosmic-ray electron anisotropies with the Fermi Large Area Telescope

Author

Ackermann, M., Ajello, M., Atwood, W. B., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Berenji, B., Bloom, E. D., Bonamente, E., Borgland, A. W., Bouvier, A., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Buehler, R., Burnett, T. H., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Carrigan, S., Casandjian, J. M., Cecchi, C., Celik, Oe, Charles, E., Chekhtman, A., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Cuoco, A., Dermer, C. D., de Angelis, A., de Palma, F., Digel, S. W., Di Bernardo, G., do Couto e Silva, E., Drell, P. S., Dubois, R., Favuzzi, C., Fegan, S. J., Focke, W. B., Frailis, M., Fukazawa, Y., Funk, S., Fusco, P., Gaggero, D., Gargano, F., Germani, S., Giglietto, N., Giommi, P., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grasso, D., Grenier, I. A., Grove, J. E., Guiriec, S., Gustafsson, M., Hadasch, D., Harding, A. K., Hayashi, K., Hays, E., Hughes, R. E., Johannesson, G., Johnson, A. S., Johnson, W. N., Kamae, T., Katagiri, H., Kataoka, J., Kerr, M., Knoedlseder, J., Kuss, M., Lande, J., Latronico, L., Lee, S. -H, Lemoine-Goumard, M., Garde, M. Llena, Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Makeev, A., Mazziotta, M. N., McEnery, J. E., Mehault, J., Michelson, P. F., Mizuno, T., Moiseev, A. A., Monte, C., Monzani, M. E., Moretti, Elena, Morselli, A., Moskalenko, I. V., Murgia, S., Nakamori, T., Naumann-Godo, M., Nolan, P. L., Nuss, E., Ohsugi, T., Okumura, A., Omodei, N., Orlando, E., Ormes, J. F., Paneque, D., Panetta, J. H., Parent, D., Pelassa, V., Pepe, M., Pesce-Rollins, M., Piron, F., Porter, T. A., Profumo, S., Raino, S., Rando, R., Razzano, M., Reimer, A., Reimer, O., Reposeur, T., Ripken, J., Ritz, S., Roth, M., Sadrozinski, H. F. -W, Sander, A., Schalk, T. L., Sgro, C., Siegal-Gaskins, J., Siskind, E. J., Smith, D. A., Smith, P. D., Spandre, G., Spinelli, P., Strickman, M. S., Strong, A. W., Suson, D. J., Takahashi, H., Takahashi, T., Tanaka, T., Thayer, J. B., Thayer, J. G., Thompson, D. J., Tibaldo, L., Torres, D. F., Tosti, G., Tramacere, A., Uchiyama, Y., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vilchez, N., Vitale, V., Waite, A. P., Wang, P., Winer, B. L., Wood, K. S., Yang, Z., Ylinen, Tomi, Zaharijas, G., Ziegler, M., Ackermann, M., Ajello, M., Atwood, W. B., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Berenji, B., Bloom, E. D., Bonamente, E., Borgland, A. W., Bouvier, A., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Buehler, R., Burnett, T. H., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Carrigan, S., Casandjian, J. M., Cecchi, C., Celik, Oe, Charles, E., Chekhtman, A., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Cuoco, A., Dermer, C. D., de Angelis, A., de Palma, F., Digel, S. W., Di Bernardo, G., do Couto e Silva, E., Drell, P. S., Dubois, R., Favuzzi, C., Fegan, S. J., Focke, W. B., Frailis, M., Fukazawa, Y., Funk, S., Fusco, P., Gaggero, D., Gargano, F., Germani, S., Giglietto, N., Giommi, P., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grasso, D., Grenier, I. A., Grove, J. E., Guiriec, S., Gustafsson, M., Hadasch, D., Harding, A. K., Hayashi, K., Hays, E., Hughes, R. E., Johannesson, G., Johnson, A. S., Johnson, W. N., Kamae, T., Katagiri, H., Kataoka, J., Kerr, M., Knoedlseder, J., Kuss, M., Lande, J., Latronico, L., Lee, S. -H, Lemoine-Goumard, M., Garde, M. Llena, Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Makeev, A., Mazziotta, M. N., McEnery, J. E., Mehault, J., Michelson, P. F., Mizuno, T., Moiseev, A. A., Monte, C., Monzani, M. E., Moretti, Elena, Morselli, A., Moskalenko, I. V., Murgia, S., Nakamori, T., Naumann-Godo, M., Nolan, P. L., Nuss, E., Ohsugi, T., Okumura, A., Omodei, N., Orlando, E., Ormes, J. F., Paneque, D., Panetta, J. H., Parent, D., Pelassa, V., Pepe, M., Pesce-Rollins, M., Piron, F., Porter, T. A., Profumo, S., Raino, S., Rando, R., Razzano, M., Reimer, A., Reimer, O., Reposeur, T., Ripken, J., Ritz, S., Roth, M., Sadrozinski, H. F. -W, Sander, A., Schalk, T. L., Sgro, C., Siegal-Gaskins, J., Siskind, E. J., Smith, D. A., Smith, P. D., Spandre, G., Spinelli, P., Strickman, M. S., Strong, A. W., Suson, D. J., Takahashi, H., Takahashi, T., Tanaka, T., Thayer, J. B., Thayer, J. G., Thompson, D. J., Tibaldo, L., Torres, D. F., Tosti, G., Tramacere, A., Uchiyama, Y., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vilchez, N., Vitale, V., Waite, A. P., Wang, P., Winer, B. L., Wood, K. S., Yang, Z., Ylinen, Tomi, Zaharijas, G., and Ziegler, M.

Abstract

The Large Area Telescope on board the Fermi satellite (Fermi LAT) detected more than 1.6 x 10(6) cosmic-ray electrons/positrons with energies above 60 GeV during its first year of operation. The arrival directions of these events were searched for anisotropies of angular scale extending from similar to 10 degrees up to 90 degrees, and of minimum energy extending from 60 GeV up to 480 GeV. Two independent techniques were used to search for anisotropies, both resulting in null results. Upper limits on the degree of the anisotropy were set that depended on the analyzed energy range and on the anisotropy's angular scale. The upper limits for a dipole anisotropy ranged from similar to 0.5% to similar to 10%., QC 20101214

Published
2010
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20. Search for gamma-ray spectral lines with the Fermi Large Area Telescope and dark matter implications

Author

Ackermann, M., primary, Ajello, M., additional, Albert, A., additional, Allafort, A., additional, Baldini, L., additional, Barbiellini, G., additional, Bastieri, D., additional, Bechtol, K., additional, Bellazzini, R., additional, Bissaldi, E., additional, Bloom, E. D., additional, Bonamente, E., additional, Bottacini, E., additional, Brandt, T. J., additional, Bregeon, J., additional, Brigida, M., additional, Bruel, P., additional, Buehler, R., additional, Buson, S., additional, Caliandro, G. A., additional, Cameron, R. A., additional, Caraveo, P. A., additional, Casandjian, J. M., additional, Cecchi, C., additional, Charles, E., additional, Chaves, R. C. G., additional, Chekhtman, A., additional, Chiang, J., additional, Ciprini, S., additional, Claus, R., additional, Cohen-Tanugi, J., additional, Conrad, J., additional, Cutini, S., additional, D’Ammando, F., additional, de Angelis, A., additional, de Palma, F., additional, Dermer, C. D., additional, Digel, S. W., additional, Di Venere, L., additional, Drell, P. S., additional, Drlica-Wagner, A., additional, Essig, R., additional, Favuzzi, C., additional, Fegan, S. J., additional, Ferrara, E. C., additional, Focke, W. B., additional, Franckowiak, A., additional, Fukazawa, Y., additional, Funk, S., additional, Fusco, P., additional, Gargano, F., additional, Gasparrini, D., additional, Germani, S., additional, Giglietto, N., additional, Giordano, F., additional, Giroletti, M., additional, Glanzman, T., additional, Godfrey, G., additional, Gomez-Vargas, G. A., additional, Grenier, I. A., additional, Guiriec, S., additional, Gustafsson, M., additional, Hadasch, D., additional, Hayashida, M., additional, Hill, A. B., additional, Horan, D., additional, Hou, X., additional, Hughes, R. E., additional, Inoue, Y., additional, Izaguirre, E., additional, Jogler, T., additional, Kamae, T., additional, Knödlseder, J., additional, Kuss, M., additional, Lande, J., additional, Larsson, S., additional, Latronico, L., additional, Longo, F., additional, Loparco, F., additional, Lovellette, M. N., additional, Lubrano, P., additional, Malyshev, D., additional, Mayer, M., additional, Mazziotta, M. N., additional, McEnery, J. E., additional, Michelson, P. F., additional, Mitthumsiri, W., additional, Mizuno, T., additional, Moiseev, A. A., additional, Monzani, M. E., additional, Morselli, A., additional, Moskalenko, I. V., additional, Murgia, S., additional, Nakamori, T., additional, Nemmen, R., additional, Nuss, E., additional, Ohsugi, T., additional, Okumura, A., additional, Omodei, N., additional, Orienti, M., additional, Orlando, E., additional, Ormes, J. F., additional, Paneque, D., additional, Perkins, J. S., additional, Pesce-Rollins, M., additional, Piron, F., additional, Pivato, G., additional, Rainò, S., additional, Rando, R., additional, Razzano, M., additional, Razzaque, S., additional, Reimer, A., additional, Reimer, O., additional, Romani, R. W., additional, Sánchez-Conde, M., additional, Schulz, A., additional, Sgrò, C., additional, Siegal-Gaskins, J., additional, Siskind, E. J., additional, Snyder, A., additional, Spandre, G., additional, Spinelli, P., additional, Suson, D. J., additional, Tajima, H., additional, Takahashi, H., additional, Thayer, J. G., additional, Thayer, J. B., additional, Tibaldo, L., additional, Tinivella, M., additional, Tosti, G., additional, Troja, E., additional, Uchiyama, Y., additional, Usher, T. L., additional, Vandenbroucke, J., additional, Vasileiou, V., additional, Vianello, G., additional, Vitale, V., additional, Winer, B. L., additional, Wood, K. S., additional, Wood, M., additional, Yang, Z., additional, Zaharijas, G., additional, and Zimmer, S., additional

Published
2013
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21. THE FERMI LARGE AREA TELESCOPE ON ORBIT: EVENT CLASSIFICATION, INSTRUMENT RESPONSE FUNCTIONS, AND CALIBRATION

Author

Ackermann, M., primary, Ajello, M., additional, Albert, A., additional, Allafort, A., additional, Atwood, W. B., additional, Axelsson, M., additional, Baldini, L., additional, Ballet, J., additional, Barbiellini, G., additional, Bastieri, D., additional, Bechtol, K., additional, Bellazzini, R., additional, Bissaldi, E., additional, Blandford, R. D., additional, Bloom, E. D., additional, Bogart, J. R., additional, Bonamente, E., additional, Borgland, A. W., additional, Bottacini, E., additional, Bouvier, A., additional, Brandt, T. J., additional, Bregeon, J., additional, Brigida, M., additional, Bruel, P., additional, Buehler, R., additional, Burnett, T. H., additional, Buson, S., additional, Caliandro, G. A., additional, Cameron, R. A., additional, Caraveo, P. A., additional, Casandjian, J. M., additional, Cavazzuti, E., additional, Cecchi, C., additional, Çelik, Ö., additional, Charles, E., additional, Chaves, R. C. G., additional, Chekhtman, A., additional, Cheung, C. C., additional, Chiang, J., additional, Ciprini, S., additional, Claus, R., additional, Cohen-Tanugi, J., additional, Conrad, J., additional, Corbet, R., additional, Cutini, S., additional, D’Ammando, F., additional, Davis, D. S., additional, de Angelis, A., additional, DeKlotz, M., additional, de Palma, F., additional, Dermer, C. D., additional, Digel, S. W., additional, do Couto e Silva, E., additional, Drell, P. S., additional, Drlica-Wagner, A., additional, Dubois, R., additional, Favuzzi, C., additional, Fegan, S. J., additional, Ferrara, E. C., additional, Focke, W. B., additional, Fortin, P., additional, Fukazawa, Y., additional, Funk, S., additional, Fusco, P., additional, Gargano, F., additional, Gasparrini, D., additional, Gehrels, N., additional, Giebels, B., additional, Giglietto, N., additional, Giordano, F., additional, Giroletti, M., additional, Glanzman, T., additional, Godfrey, G., additional, Grenier, I. A., additional, Grove, J. E., additional, Guiriec, S., additional, Hadasch, D., additional, Hayashida, M., additional, Hays, E., additional, Horan, D., additional, Hou, X., additional, Hughes, R. E., additional, Jackson, M. S., additional, Jogler, T., additional, Jóhannesson, G., additional, Johnson, R. P., additional, Johnson, T. J., additional, Johnson, W. N., additional, Kamae, T., additional, Katagiri, H., additional, Kataoka, J., additional, Kerr, M., additional, Knödlseder, J., additional, Kuss, M., additional, Lande, J., additional, Larsson, S., additional, Latronico, L., additional, Lavalley, C., additional, Lemoine-Goumard, M., additional, Longo, F., additional, Loparco, F., additional, Lott, B., additional, Lovellette, M. N., additional, Lubrano, P., additional, Mazziotta, M. N., additional, McConville, W., additional, McEnery, J. E., additional, Mehault, J., additional, Michelson, P. F., additional, Mitthumsiri, W., additional, Mizuno, T., additional, Moiseev, A. A., additional, Monte, C., additional, Monzani, M. E., additional, Morselli, A., additional, Moskalenko, I. V., additional, Murgia, S., additional, Naumann-Godo, M., additional, Nemmen, R., additional, Nishino, S., additional, Norris, J. P., additional, Nuss, E., additional, Ohno, M., additional, Ohsugi, T., additional, Okumura, A., additional, Omodei, N., additional, Orienti, M., additional, Orlando, E., additional, Ormes, J. F., additional, Paneque, D., additional, Panetta, J. H., additional, Perkins, J. S., additional, Pesce-Rollins, M., additional, Pierbattista, M., additional, Piron, F., additional, Pivato, G., additional, Porter, T. A., additional, Racusin, J. L., additional, Rainò, S., additional, Rando, R., additional, Razzano, M., additional, Razzaque, S., additional, Reimer, A., additional, Reimer, O., additional, Reposeur, T., additional, Reyes, L. C., additional, Ritz, S., additional, Rochester, L. S., additional, Romoli, C., additional, Roth, M., additional, Sadrozinski, H. F.-W., additional, Sanchez, D. A., additional, Saz Parkinson, P. M., additional, Sbarra, C., additional, Scargle, J. D., additional, Sgrò, C., additional, Siegal-Gaskins, J., additional, Siskind, E. J., additional, Spandre, G., additional, Spinelli, P., additional, Stephens, T. E., additional, Suson, D. J., additional, Tajima, H., additional, Takahashi, H., additional, Tanaka, T., additional, Thayer, J. G., additional, Thayer, J. B., additional, Thompson, D. J., additional, Tibaldo, L., additional, Tinivella, M., additional, Tosti, G., additional, Troja, E., additional, Usher, T. L., additional, Vandenbroucke, J., additional, Van Klaveren, B., additional, Vasileiou, V., additional, Vianello, G., additional, Vitale, V., additional, Waite, A. P., additional, Wallace, E., additional, Winer, B. L., additional, Wood, D. L., additional, Wood, K. S., additional, Wood, M., additional, Yang, Z., additional, and Zimmer, S., additional

Published
2012
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23. Publisher’s Note: Anisotropies in the diffuse gamma-ray background measured by the Fermi LAT [Phys. Rev. D85, 083007 (2012)]

Author

Ackermann, M., primary, Ajello, M., additional, Albert, A., additional, Baldini, L., additional, Ballet, J., additional, Barbiellini, G., additional, Bastieri, D., additional, Bechtol, K., additional, Bellazzini, R., additional, Bloom, E. D., additional, Bonamente, E., additional, Borgland, A. W., additional, Brandt, T. J., additional, Bregeon, J., additional, Brigida, M., additional, Bruel, P., additional, Buehler, R., additional, Buson, S., additional, Caliandro, G. A., additional, Cameron, R. A., additional, Caraveo, P. A., additional, Cecchi, C., additional, Charles, E., additional, Chekhtman, A., additional, Chiang, J., additional, Ciprini, S., additional, Claus, R., additional, Cohen-Tanugi, J., additional, Conrad, J., additional, Cuoco, A., additional, Cutini, S., additional, D’Ammando, F., additional, de Palma, F., additional, Dermer, C. D., additional, Digel, S. W., additional, do Couto e Silva, E., additional, Drell, P. S., additional, Drlica-Wagner, A., additional, Dubois, R., additional, Favuzzi, C., additional, Fegan, S. J., additional, Ferrara, E. C., additional, Fortin, P., additional, Fukazawa, Y., additional, Fusco, P., additional, Gargano, F., additional, Gasparrini, D., additional, Germani, S., additional, Giglietto, N., additional, Giroletti, M., additional, Glanzman, T., additional, Godfrey, G., additional, Gomez-Vargas, G. A., additional, Grégoire, T., additional, Grenier, I. A., additional, Grove, J. E., additional, Guiriec, S., additional, Gustafsson, M., additional, Hadasch, D., additional, Hayashida, M., additional, Hayashi, K., additional, Hou, X., additional, Hughes, R. E., additional, Jóhannesson, G., additional, Johnson, A. S., additional, Kamae, T., additional, Knödlseder, J., additional, Kuss, M., additional, Lande, J., additional, Latronico, L., additional, Lemoine-Goumard, M., additional, Linden, T., additional, Lionetto, A. M., additional, Llena Garde, M., additional, Longo, F., additional, Loparco, F., additional, Lovellette, M. N., additional, Lubrano, P., additional, Mazziotta, M. N., additional, McEnery, J. E., additional, Mitthumsiri, W., additional, Mizuno, T., additional, Monte, C., additional, Monzani, M. E., additional, Morselli, A., additional, Moskalenko, I. V., additional, Murgia, S., additional, Naumann-Godo, M., additional, Norris, J. P., additional, Nuss, E., additional, Ohsugi, T., additional, Okumura, A., additional, Orienti, M., additional, Orlando, E., additional, Ormes, J. F., additional, Paneque, D., additional, Panetta, J. H., additional, Parent, D., additional, Pavlidou, V., additional, Pesce-Rollins, M., additional, Pierbattista, M., additional, Piron, F., additional, Pivato, G., additional, Rainò, S., additional, Rando, R., additional, Reimer, A., additional, Reimer, O., additional, Roth, M., additional, Sbarra, C., additional, Schmitt, J., additional, Sgrò, C., additional, Siegal-Gaskins, J., additional, Siskind, E. J., additional, Spandre, G., additional, Spinelli, P., additional, Strong, A. W., additional, Suson, D. J., additional, Takahashi, H., additional, Tanaka, T., additional, Thayer, J. B., additional, Tibaldo, L., additional, Tinivella, M., additional, Torres, D. F., additional, Tosti, G., additional, Troja, E., additional, Usher, T. L., additional, Vandenbroucke, J., additional, Vasileiou, V., additional, Vianello, G., additional, Vitale, V., additional, Waite, A. P., additional, Winer, B. L., additional, Wood, K. S., additional, Wood, M., additional, Yang, Z., additional, Zimmer, S., additional, and Komatsu, E., additional

Published
2012
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24. Searches for cosmic-ray electron anisotropies with the Fermi Large Area Telescope

Author

Ackermann, M., primary, Ajello, M., additional, Atwood, W. B., additional, Baldini, L., additional, Ballet, J., additional, Barbiellini, G., additional, Bastieri, D., additional, Bechtol, K., additional, Bellazzini, R., additional, Berenji, B., additional, Bloom, E. D., additional, Bonamente, E., additional, Borgland, A. W., additional, Bouvier, A., additional, Bregeon, J., additional, Brez, A., additional, Brigida, M., additional, Bruel, P., additional, Buehler, R., additional, Burnett, T. H., additional, Buson, S., additional, Caliandro, G. A., additional, Cameron, R. A., additional, Caraveo, P. A., additional, Carrigan, S., additional, Casandjian, J. M., additional, Cecchi, C., additional, Çelik, Ö., additional, Charles, E., additional, Chekhtman, A., additional, Cheung, C. C., additional, Chiang, J., additional, Ciprini, S., additional, Claus, R., additional, Cohen-Tanugi, J., additional, Conrad, J., additional, Cuoco, A., additional, Dermer, C. D., additional, de Angelis, A., additional, de Palma, F., additional, Digel, S. W., additional, Di Bernardo, G., additional, do Couto e Silva, E., additional, Drell, P. S., additional, Dubois, R., additional, Favuzzi, C., additional, Fegan, S. J., additional, Focke, W. B., additional, Frailis, M., additional, Fukazawa, Y., additional, Funk, S., additional, Fusco, P., additional, Gaggero, D., additional, Gargano, F., additional, Germani, S., additional, Giglietto, N., additional, Giommi, P., additional, Giordano, F., additional, Giroletti, M., additional, Glanzman, T., additional, Godfrey, G., additional, Grasso, D., additional, Grenier, I. A., additional, Grove, J. E., additional, Guiriec, S., additional, Gustafsson, M., additional, Hadasch, D., additional, Harding, A. K., additional, Hayashi, K., additional, Hays, E., additional, Hughes, R. E., additional, Jóhannesson, G., additional, Johnson, A. S., additional, Johnson, W. N., additional, Kamae, T., additional, Katagiri, H., additional, Kataoka, J., additional, Kerr, M., additional, Knödlseder, J., additional, Kuss, M., additional, Lande, J., additional, Latronico, L., additional, Lee, S.-H., additional, Lemoine-Goumard, M., additional, Llena Garde, M., additional, Longo, F., additional, Loparco, F., additional, Lovellette, M. N., additional, Lubrano, P., additional, Makeev, A., additional, Mazziotta, M. N., additional, McEnery, J. E., additional, Mehault, J., additional, Michelson, P. F., additional, Mizuno, T., additional, Moiseev, A. A., additional, Monte, C., additional, Monzani, M. E., additional, Moretti, E., additional, Morselli, A., additional, Moskalenko, I. V., additional, Murgia, S., additional, Nakamori, T., additional, Naumann-Godo, M., additional, Nolan, P. L., additional, Nuss, E., additional, Ohsugi, T., additional, Okumura, A., additional, Omodei, N., additional, Orlando, E., additional, Ormes, J. F., additional, Paneque, D., additional, Panetta, J. H., additional, Parent, D., additional, Pelassa, V., additional, Pepe, M., additional, Pesce-Rollins, M., additional, Piron, F., additional, Porter, T. A., additional, Profumo, S., additional, Rainò, S., additional, Rando, R., additional, Razzano, M., additional, Reimer, A., additional, Reimer, O., additional, Reposeur, T., additional, Ripken, J., additional, Ritz, S., additional, Roth, M., additional, Sadrozinski, H. F.-W., additional, Sander, A., additional, Schalk, T. L., additional, Sgrò, C., additional, Siegal-Gaskins, J., additional, Siskind, E. J., additional, Smith, D. A., additional, Smith, P. D., additional, Spandre, G., additional, Spinelli, P., additional, Strickman, M. S., additional, Strong, A. W., additional, Suson, D. J., additional, Takahashi, H., additional, Takahashi, T., additional, Tanaka, T., additional, Thayer, J. B., additional, Thayer, J. G., additional, Thompson, D. J., additional, Tibaldo, L., additional, Torres, D. F., additional, Tosti, G., additional, Tramacere, A., additional, Uchiyama, Y., additional, Usher, T. L., additional, Vandenbroucke, J., additional, Vasileiou, V., additional, Vilchez, N., additional, Vitale, V., additional, Waite, A. P., additional, Wang, P., additional, Winer, B. L., additional, Wood, K. S., additional, Yang, Z., additional, Ylinen, T., additional, Zaharijas, G., additional, and Ziegler, M., additional

Published
2010
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29. Constraints on dark matter models from a Fermi LAT search for high-energy cosmic-ray electrons from the Sun

Author

The, Fermi LAT Collaboration, Ajello, M., Atwood, W. B., Baldini, L., Barbiellini, G., Bastieri, D., Bellazzini, R., Berenji, B., Blandford, R. D., Bloom, E. D., Bonamente, E., Borgland, A. W., Bottacini, E., Bouvier, A., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Cecchi, C., Charles, E., Chekhtman, A., Ciprini, S., Claus, R., Cohen-Tanugi, J., Cutini, S., de, Angelis A., de, Palma F., Dermer, C. D., Digel, S.W., do, Couto e Silva E., Drell, P. S., Favuzzi, C., Fegan, S. J., Focke, W. B., Fusco, P., Gargano, F., Gehrels, N., Germani, S., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grenier, I. A., Guiriec, S., Gustafsson, M., Hadasch, D., Iafrate, G., Johannesson, G., Johnson, A. S., Kuss, M., Latronico, L., Lionetto, A. M., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Mazziotta, M. N., McEnery, J. E., Michelson, P. F., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I.V., Murgia, S., Naumann-Godo, M., Norris, J. P., Nuss, E., Omodei, N., Orlando, E., Ormes, J. F., Fukazawa, Y., Kamae, T., Katagiri, H., Kataoka, J., Mizuno, T., Ohsugi, T., Ozaki, Masanobu, Ajello, M., Atwood, W. B., Baldini, L., Barbiellini, G., Bastieri, D., Bellazzini, R., Berenji, B., Blandford, R. D., Bloom, E. D., Bonamente, E., Borgland, A. W., Bottacini, E., Bouvier, A., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Cecchi, C., Charles, E., Chekhtman, A., Ciprini, S., Claus, R., Cohen Tanugi, J., Cutini, S., Angelis, A., Palma, F., Dermer, C. D., Digel, S. W., Couto, E., Drell, P. S., Favuzzi, C., Fegan, S. J., Focke, W. B., Fukazawa, Y., Fusco, P., Gargano, F., Gehrels, N., Germani, S., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grenier, I. A., Guiriec, S., Gustafsson, M., Hadasch, D., Iafrate, G., Johannesson, G., Johnson, A. S., Kamae, T., Katagiri, H., Kataoka, J., Kuss, M., Latronico, L., Lionetto, A. M., Longo, Francesco, Loparco, F., Lovellette, M. N., Lubrano, P., Mazziotta, M. N., Mcenery, J. E., Michelson, P. F., Mizuno, T., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Naumann Godo, M., Norris, J. P., Nuss, E., Ohsugi, T., Omodei, N., Orlando, E., Ormes, J. F., Ozaki, M., Paneque, D., Panetta, J. H., Pesce Rollins, M., Pierbattista, M., Piron, F., Rain\`o, S., Rando, R., Razzano, M., Reimer, A., Reimer, O., Ritz, S., Schalk, T. L., Sgr\`o, C., Siegal Gaskins, J., Siskind, E. J., Smith, P. D., Spandre, G., Spinelli, P., Suson, D. J., Takahashi, H., Tanaka, T., Thayer, J. G., Thayer, J. B., Tibaldo, L., Tosti, G., Troja, E., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vilchez, N., Waite, A. P., Wang, P., Winer, B. L., Wood, K. S., Yang, Z., and Zimmer, S.

Subjects
Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Nuclear and High Energy Physics, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, Astronomy, Flux, FOS: Physical sciences, Cosmic ray, Electron, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Cosmic rays, High Energy Physics - Experiment, law.invention, Telescope, High Energy Physics - Experiment (hep-ex), Positron, Spitzer Space Telescope, law, Astrophysics - High Energy Astrophysical Phenomena, Fermi Gamma-ray Space Telescope
Abstract

During its first year of data taking, the Large Area Telescope (LAT) onboard the Fermi Gamma-Ray Space Telescope has collected a large sample of high-energy cosmic-ray electrons and positrons (CREs). We present the results of a directional analysis of the CRE events, in which we searched for a flux excess correlated with the direction of the Sun. Two different and complementary analysis approaches were implemented, and neither yielded evidence of a significant CRE flux excess from the Sun. We derive upper limits on the CRE flux from the Sun's direction, and use these bounds to constrain two classes of dark matter models which predict a solar CRE flux: (1) models in which dark matter annihilates to CREs via a light intermediate state, and (2) inelastic dark matter models in which dark matter annihilates to CREs., Comment: 18 pages, 8 figures, accepted for publication in Physical Review D - contact authors: Francesco Loparco (loparco@ba.infn.it), M. Nicola Mazziotta (mazziotta@ba.infn.it) and Jennifer Siegal-Gaskins (jsg@mps.ohio-state.edu)

Published
2011
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