Search

Your search keyword '"Imaging Air Cherenkov Telescopes"' showing total 10 results
Start Over Descriptor "Imaging Air Cherenkov Telescopes"
10 results on '"Imaging Air Cherenkov Telescopes"'

1. Constraining dark matter lifetime with a deep gamma-ray survey of the Perseus galaxy cluster with MAGIC.

Author

Acciari, V.A., Ansoldi, S., Antonelli, L.A., Arbet Engels, A., Arcaro, C., Baack, D., Babić, A., Banerjee, B., Bangale, P., Barres de Almeida, U., Barrio, J.A., Becerra González, J., Bednarek, W., Bernardini, E., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., and Blanch, O.

Abstract

Abstract Clusters of galaxies are the largest known gravitationally bound structures in the Universe, with masses around 1 0 15 M ⊙ , most of it in the form of dark matter. The ground-based Imaging Atmospheric Cherenkov Telescope MAGIC made a deep survey of the Perseus cluster of galaxies using almost 400 h of data recorded between 2009 and 2017. This is the deepest observational campaign so far on a cluster of galaxies in the very high energy range. We search for gamma-ray signals from dark matter particles in the mass range between 200 GeV and 200 TeV decaying into standard model pairs. We apply an analysis optimized for the spectral and morphological features expected from dark matter decays and find no evidence of decaying dark matter. From this, we conclude that dark matter particles have a decay lifetime longer than ∼ 1 0 26 s in all considered channels. Our results improve previous lower limits found by MAGIC and represent the strongest limits on decaying dark matter particles from ground-based gamma-ray instruments. [ABSTRACT FROM AUTHOR]

Published
2018
Full Text
View/download PDF

3. GRB neutrino search with MAGIC.

Author

Becker, Julia K., Gaug, Markus, Ching-Cheng Hsu, and Rhode, Wolfgang

Subjects
*GAMMA ray bursts, *NEUTRINOS, *TELESCOPES, *PHOTONS, *AFTERGLOW (Physics)
Abstract

The Major Atmospheric Gamma Imaging Cherenkov (MAGIC) telescope was designed for the detection of photon sources >=50 GeV. The measurement of highly-inclined air showers renders possible the search for high-energy neutrinos, too. Only neutrinos can traverse the Earth without interaction, and therefore, events close to the horizon can be identified as neutrino-induced rather than photon-induced or hadronic events. In this paper, Swift-XRT-detected GRBs with given spectral information are used in order to calculate the potential neutrino energy spectrum from prompt and afterglow emission for each individual GRB. The event rate in MAGIC is estimated assuming that the GRB happens within the field of view of MAGIC. A sample of 568 long GRBs as detected by BATSE is used to compare the detection rates with 163 Swift-detected bursts. BATSE has properties similar to the Gamma-ray Burst Monitor (GBM) on board of GLAST. Therefore the estimated rates give an estimate for the possibilities of neutrino detection with MAGIC from GLAST-triggered bursts. [ABSTRACT FROM AUTHOR]

Published
2008
Full Text
View/download PDF

4. Proučavanje anihilacije tamne materije u skupu galaksija Perzej pomoću gama-zraka vrlo visokih energija

Author

Ivković, Nemanja, Manganaro, Marina, and Zaharias, Gabrijela

Subjects
PRIRODNE ZNANOSTI. Fizika, Imaging Air Cherenkov Telescopes, cluster of galaxies, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics, annihilating dark matter, indirect searches, Astrophysics::Galaxy Astrophysics, Perseus, NATURAL SCIENCES. Physics
Abstract

This work of thesis aims to investigate the process of dark matter (DM) annihilation in galaxy clusters (CG). In particular, the search for DM signal was conducted in the Perseus CG in the very-high-energy (VHE) -ray range. Using data of the Perseus CG collected by MAGIC (Major Atmospheric Gamma Imaging Cherenkov Telescopes), we analyze 45.1 h of data. The morphology of the cluster is taken into account by ad-hoc simulations using a method known as donut Monte Carlo (MC). In order to address properly this study for the annihilation case, J-factors were calculated and a surface brightness profile (SBP) of Perseus was created for this specific work. The annihilating DM J-factor (smooth component only considering spherical halo) calculated in this work is 8:72 1017GeV2cm􀀀5 as well as the decaying DM D-factor with value of 2:84 1018GeVcm􀀀2 and are used for morphology study. An investigation of the skymaps and 2 plots of the analysed sample is used to suppress the signal from the AGN (Active Galactic Nuclei) present in the centre of the field of view, NGC 1275. The applied set of cuts successfully excludes NGC 1275 from the data sample. Future prospects include the calculation of the sensitivity of the search and the estimation of the dark matter annihilation crosssection for different channels.

Published
2020

5. A search for dark matter in Triangulum II with the MAGIC telescopes

Author

Satoshi Fukami, Alice Donini, F. Leone, Lorenzo Bellizzi, Wlodek Bednarek, Masahiro Teshima, M. Palatiello, N. Torres-Albà, Daniela Dorner, D. Dominis Prester, Pablo Peñil, Fabrizio Tavecchio, Gaia Vanzo, Francesco Dazzi, Ll. Font, Kari Nilsson, V. Vitale, Valerio Vagelli, Nikola Godinovic, Jose Miguel Miranda, E. Prandini, Christian Fruck, G. Busetto, Yating Chai, D. Miceli, V. Fallah Ramazani, Stefan Cikota, Jordi Delgado, Pawel Gliwny, M. Vazquez Acosta, M. Gaug, A. Somero, G. Ferrara, Manuel Delfino, D. Zarić, Victoria Moreno, L. Nogués, Jarred Gershon Green, Adrian Biland, Cosimo Nigro, F. Di Pierro, Ž. Bošnjak, J. Herrera, Giacomo Bonnoli, D. Ninci, P. G. Prada Moroni, E. Molina, Francesco Longo, John Hoang, Chiara Righi, E. Colombo, Ana Babić, Serena Loporchio, D. Fidalgo, I. Snidaric, Lab Saha, Luca Foffano, Razmik Mirzoyan, U. Barres de Almeida, J. van Scherpenberg, Elisa Bernardini, Stefano Ansoldi, Tjark Miener, David Paneque, U. Colin, David A. Green, J. Kushida, V. D'Elia, Daniel Morcuende, Jose Luis Contreras, Juan Cortina, P. Temnikov, Alexander Hahn, Juan Abel Barrio, J. Rico, Riccardo Paoletti, Alessandra Lamastra, L. Di Venere, M. Peresano, D. Guberman, Narek Sahakyan, Damir Lelas, Francesco Gabriele Saturni, Dorota Sobczyńska, Léa Jouvin, B. De Lotto, S. Nozaki, Stefano Covino, B. Banerjee, Wrijupan Bhattacharyya, Shunsuke Sakurai, D. Strom, Kai Phillip Schmidt, K. Noda, P. Da Vela, J. Palacio, Martin Makariev, E. Do Souto Espiñeira, Tomislav Terzić, Ivica Puljak, Oscar Blanch, Dario Hrupec, Sidika Merve Colak, D. Hadasch, Davide Depaoli, M. A. Lopez, J. Becerra González, D. Elsaesser, J. M. Paredes, Antonio Stamerra, Mitsunari Takahashi, P. Munar-Adrover, Victor A. Acciari, Abelardo Moralejo, Ievgen Vovk, Camilla Maggio, E. Moretti, Pratik Majumdar, M. V. Fonseca, Mosè Mariotti, Moritz Hütten, Julian Sitarek, A. Arbet Engels, A. De Angelis, Vitaly Neustroev, Sargis Gasparyan, Yuki Iwamura, Martin Will, A. Rugliancich, Marina Manganaro, Saverio Lombardi, A. López-Oramas, Susumu Inoue, Alessio Berti, Luca Tosti, S. Mićanović, K. Nishijima, L. A. Antonelli, Jürgen Besenrieder, T. Schweizer, M. Minev, Ferdinando Giordano, Toshiaki Inada, Wolfgang Rhode, Konstancja Satalecka, Manuela Mallamaci, G. Maneva, Michele Doro, Yusuke Suda, Carlo Vigorito, Ciro Bigongiari, T. Surić, S. Paiano, M. Garczarczyk, Karl Mannheim, R. López-Coto, Daniel Kerszberg, Tomoki Saito, Giovanni Ceribella, Kazuma Ishio, Rodolfo Carosi, Dominik Baack, Ashot Chilingarian, L. Maraschi, Elina Lindfors, Marc Ribó, Daniel Mazin, Hidetoshi Kubo, Alicia Fattorini, M. I. Martínez, B. Machado de Oliveira Fraga, N. Giglietto, R. J. García López, Massimo Persic, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Ministerio de Economía y Competitividad (España), Acciari, V. A., Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Baack, D., Babic, A., Banerjee, B., Barres de Almeida, U., Barrio, J. A., Becerra Gonzalez, J., Bednarek, W., Bellizzi, L., Bernardini, E., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Bosnjak, Z., Busetto, G., Carosi, R., Ceribella, G., Chai, Y., Chilingarian, A., Cikota, S., Colak, S. M., Colin, U., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D'Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Depaoli, D., Di Pierro, F., Di Venere, L., Do Souto Espineira, E., Dominis Prester, D., Donini, A., Dorner, D., Doro, M., Elsaesser, D., Fallah Ramazani, V., Fattorini, A., Ferrara, G., Fidalgo, D., Foffano, L., Fonseca, M. V., Font, L., Fruck, C., Fukami, S., Garcia Lopez, R. J., Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Gliwny, P., Godinovic, N., Green, D., Green, J. G., Guberman, D., Hadasch, D., Hahn, A., Herrera, J., Hoang, J., Hrupec, D., Hutten, M., Inada, T., Inoue, S., Ishio, K., Iwamura, Y., Jouvin, L., Kerszberg, D., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Lopez-Coto, R., Lopez-Oramas, A., Loporchio, S., Machado de Oliveira Fraga, B., Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Mazin, D., Micanovic, S., Miceli, D., Miener, T., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Morcuende, D., Moreno, V., Moretti, E., Munar-Adrover, P., Neustroev, V., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogues, L., Nozaki, S., Paiano, S., Palacio, J., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Penil, P., Peresano, M., Persic, M., Prada Moroni, P. G., Prandini, E., Puljak, I., Rhode, W., Ribo, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Sahakyan, N., Saito, T., Sakurai, S., Satalecka, K., Saturni, F. G., Schmidt, K., Schweizer, T., Sitarek, J., Snidaric, I., Sobczynska, D., Somero, A., Stamerra, A., Strom, D., Suda, Y., Suric, T., Takahashi, M., Tavecchio, F., Temnikov, P., Terzic, T., Teshima, M., Torres-Alba, N., Tosti, L., Vagelli, V., van Scherpenberg, J., Vanzo, G., Vazquez Acosta, M., Vigorito, C. F., Vitale, V., Vovk, I., Will, M., and Zaric, D.

Subjects
Dwarf spheroidal satellite galaxies, Astrophysics, 7. Clean energy, 01 natural sciences, dark matter [WIMP], Imaging air Cherenkov telescopes, High Energy Physics - Phenomenology (hep-ph), WIMP, Dwarf spheroidal satellite galaxie, flux [gamma ray], Triangulum II, annihilation [WIMP], 010303 astronomy & astrophysics, Physics, astro-ph.HE, High Energy Astrophysical Phenomena (astro-ph.HE), Annihilation, scaling, density [dark matter], hep-ph, halo [dark matter], High Energy Physics - Phenomenology, Dark matter, Indirect searches, kinematics, Física nuclear, Halo, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics and Astronomy, Milky Way, satellite, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, GeneralLiterature_MISCELLANEOUS, VHE, annihilation [down], 0103 physical sciences, Imaging air Cherenkov telescope, Indirect searche, ddc:530, Astrophysics::Galaxy Astrophysics, Particle Physics - Phenomenology, Triangulum, 010308 nuclear & particles physics, ComputingMilieux_PERSONALCOMPUTING, Astronomy and Astrophysics, MAGIC, Galaxy, Dark matter halo, annihilation [cross section], Space and Planetary Science, galaxy
Abstract

MAGIC Collaboration: et al., arXiv:2003.05260v1, We present the first results from very-high-energy observations of the dwarf spheroidal satellite candidate Triangulum II with the MAGIC telescopes from 62.4 hours of good-quality data taken between August 2016 and August 2017. We find no gamma-ray excess in the direction of Triangulum II, and upper limits on both the differential and integral gamma-ray flux are presented. Currently, the kinematics of Triangulum II are affected by large uncertainties leading to a bias in the determination of the properties of its dark matter halo. Using a scaling relation between the annihilation J -factor and heliocentric distance of well-known dwarf spheroidal galaxies, we estimate an annihilation J -factor for Triangulum II for WIMP dark matter of log[Jann(0.5◦)/ GeV2cm−5] = 19.35±0.37. We also derive a dark matter density profile for the object relying on results from resolved simulations of Milky Way sized dark matter halos. We obtain 95% confidence-level limits on the thermally averaged annihilation cross section for WIMP annihilation into various Standard Model channels. The most stringent limits are obtained in the τ−τ+final state, where a cross section for annihilation down to hσannvi = 3.05 × 10−24cm3s−1is excluded., The financial support of the German BMBF and MPG, Germany, the Italian INFN and INAF, Italy, the Swiss National Fund SNF, the ERDF under the Spanish MINECO (FPA2017-87859-P, FPA2017-85668-P, FPA2017-82729-C6-2-R, FPA2017-82729-C6-6-R, FPA2017-82729-C6-5-R, AYA2015-71042-P, AYA2016-76012-C3-1-P, ESP2017-87055-C2-2-P, FPA2017-90566-REDC), the Indian Department of Atomic Energy, the Japanese JSPS, Japan and MEXT, Japan, the Bulgarian Ministry of Education and Science, National RI Roadmap Project DO1-153/28.08.2018 and the Academy of Finland grant nr. 320045 is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia “Severo Ochoa” SEV-2016-0588 and SEV-2015-0548, and Unidad de Excelencia “María de Maeztu” MDM-2014-0369, by the Croatian Science Foundation (HrZZ) Project IP-2016-06-9782 and the University of Rijeka, Croatia Project 13.12.1.3.02, by the DFG, Germany Collaborative Research Centers SFB823/C4 and SFB876/C3, the Polish National Research Centre, Polland grant UMO-2016/22/M/ST9/00382 and by the Brazilian MCTIC, CNPq, Brazil and FAPERJ, Brazil .

Published
2020

6. The status of Cherenkov detectors in astroparticle physics

Author

Hallewell, G.D.

Subjects
*CHERENKOV counters, *NUCLEAR physics, *COSMIC rays, *ASTROPHYSICAL radiation
Abstract

Abstract: The Cherenkov detectors used in astroparticle physics are found in the most varied of environments. Used for the detection of charged cosmic rays, γ-rays and neutrinos, these detectors can be found on land, suspended beneath high-altitude balloons, orbiting in space, or implanted at great depth under land, in the oceans or southern polar ice. Stereoscopic imaging air Cherenkov telescope arrays are used in the study of high-energy γ-rays on several continents. The largest detector arrays in existence use thousands of photomultiplier tubes to record the arrival of the Cherenkov light from neutrinos or from secondary particles created in extensive air showers. Representatives from this rich catalog of innovation are outlined. [Copyright &y& Elsevier]

Published
2005
Full Text
View/download PDF

7. A search for dark matter in Triangulum II with the MAGIC telescopes.

Author

Acciari, V.A., Ansoldi, S., Antonelli, L.A., Arbet Engels, A., Baack, D., Babić, A., Banerjee, B., Barres de Almeida, U., Barrio, J.A., Becerra González, J., Bednarek, W., Bellizzi, L., Bernardini, E., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., and Bonnoli, G.

Abstract

We present the first results from very-high-energy observations of the dwarf spheroidal satellite candidate Triangulum II with the MAGIC telescopes from 62.4 h of good-quality data taken between August 2016 and August 2017. We find no gamma-ray excess in the direction of Triangulum II, and upper limits on both the differential and integral gamma-ray flux are presented. Currently, the kinematics of Triangulum II are affected by large uncertainties leading to a bias in the determination of the properties of its dark matter halo. Using a scaling relation between the annihilation J -factor and heliocentric distance of well-known dwarf spheroidal galaxies, we estimate an annihilation J -factor for Triangulum II for WIMP dark matter of log J ann (0. 5 °) ∕ GeV 2 cm − 5 = 19. 35 ± 0. 37. We also derive a dark matter density profile for the object relying on results from resolved simulations of Milky Way sized dark matter halos. We obtain 95% confidence-level limits on the thermally averaged annihilation cross section for WIMP annihilation into various Standard Model channels. The most stringent limits are obtained in the τ − τ + final state, where a cross section for annihilation down to 〈 σ ann v 〉 = 3. 05 × 1 0 − 24 cm3 s−1 is excluded. [ABSTRACT FROM AUTHOR]

Published
2020
Full Text
View/download PDF

8. The status of Cherenkov detectors in astroparticle physics

Author

Gregory David Hallewell, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and J. Engelfried, G. Paic

Subjects
Nuclear and High Energy Physics, Photomultiplier, Physics::Instrumentation and Detectors, Cherenkov detector, Astrophysics::High Energy Astrophysical Phenomena, Hybrid photon detector, Cosmic ray, Astrophysics, 95.55.Vj, 85.60.Ha, 07.87.+v, 29.40.Ka, 29.40.Gx, 29.40.Mc, 01 natural sciences, Physics::Geophysics, law.invention, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Telescope, Imaging air Cherenkov telescopes, law, Extended air shower, Neutrino, 0103 physical sciences, High-energy gamma-ray, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, 010303 astronomy & astrophysics, Instrumentation, Physics::Atmospheric and Oceanic Physics, Cherenkov radiation, Astroparticle physics, Physics, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Cherenkov Telescope Array
Abstract

The Cherenkov detectors used in astroparticle physics are found in the most varied of environments. Used for the detection of charged cosmic rays, $\gamma$-rays and neutrinos, these detectors can be found on land, suspended beneath high-altitude balloons, orbiting in space, or implanted at great depth under land, in the oceans or southern polar ice. Stereoscopic imaging air Cherenkov telescope arrays are used in the study of high-energy $\gamma$-rays on several continents. The largest detector arrays in existence use thousands of photomultiplier tubes to record the arrival of the Cherenkov light from neutrinos or from secondary particles created in extensive air showers. Representatives from this rich catalog of innovation are outlined.

Published
2005

9. Optimized dark matter searches in deep observations of Segue 1 with MAGIC

Author

M. V. Fonseca, L. Maraschi, M. Palatiello, Daniel Ferenc, Antonio Stamerra, Christian Fruck, Juan Abel Barrio, I. Puljak, J. Kushida, K. Kodani, Mosè Mariotti, Abelardo Moralejo, A.-K. Overkemping, Stefano Covino, Jose Luis Contreras, Oscar Blanch, Tomislav Terzić, Francesco Dazzi, Daniela Dorner, Juan Cortina, T. Steinbring, J. Storz, R. J. García López, Fabio Zandanel, G. Bonnoli, Shan Sun, Nikola Godinovic, Benito Marcote, R. Zanin, P. Da Vela, Robert Wagner, D. Hadasch, A. Saggion, Tihomir Surić, D. Carreto Fidalgo, Jelena Aleksić, D. Tescaro, A. Niedzwiecki, Adrian Biland, David Paneque, B. De Lotto, Saverio Lombardi, D. Garrido Terrats, K. Frantzen, Nijil Mankuzhiyil, X. Paredes-Fortuny, D. Dominis Prester, Damir Lelas, D. Nakajima, Louis Antonelli, Elina Lindfors, Karl Mannheim, P. Munar-Adrover, P. G. Prada Moroni, Daniel Mazin, A. De Angelis, V. Scalzotto, Stefano Ansoldi, Konstancja Satalecka, Silvia Preziuso, Riccardo Paoletti, Markus Gaug, S. Rügamer, Michele Doro, C. Schultz, V. Scapin, Dario Hrupec, Aaron Dominguez, Marc Ribó, A. López-Oramas, M. Uellenbeck, Dorothee Hildebrand, Ana Babić, G. De Caneva, R. Reinthal, Alessandro Carosi, P. Antoranz, Hidetoshi Kubo, S. Bonnefoy, Ruben Lopez-Coto, J. Becerra González, Petar Temnikov, J. M. Paredes, J. Hose, Diego F. Torres, Jose Miguel Miranda, Kari Nilsson, M. López, Dorota Sobczyńska, Elisa Bernardini, D. Elsaesser, T. Schweizer, H. Kellermann, Yusuke Konno, O. Tibolla, U. Barres de Almeida, Mario Meucci, K. Berger, I. Lozano, M. Salvati, F. Borracci, W. Idec, R. K. Bock, Emanuele Paolo Farina, A. Sillanpää, M. Doert, Takashi Saito, Masahiro Teshima, Alejandro Ibarra, E. Colombo, Hajime Takami, Reiko Orito, G. Maneva, C. Delgado Mendez, Felix Spanier, Natalia Lewandowska, K. Saito, Julian Sitarek, Pierre Colin, Julia Thaele, Aldo Treves, L. O. Takalo, A. La Barbera, E. Carmona, M. I. Martínez, Kazuyoshi Nishijima, M. Hayashida, P. Bangale, Gianluca Giavitto, A. González Muñoz, V. Kadenius, Sabrina Einecke, S. R. Gozzini, Francisco Prada, J. Rodriguez Garcia, M. Makariev, J. Rico, Victor Stamatescu, U. Menzel, Simona Paiano, Thomas Bretz, R. Mirzoyan, Wolfgang Rhode, J. Krause, K. Mallot, Massimo Persic, Takeshi Toyama, I. Snidaric, D. Eisenacher, Markus Garczarczyk, Nina Nowak, E. Lorenz, W. Bednarek, Fabrizio Tavecchio, Ll. Font, Elisa Prandini, Patrick Vogler, A. Herrero, S. Partini, Universitat de Barcelona, and SCOAP

Subjects
Astrofísica, Particle physics, Electromagnetic spectrum, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, dark matter, indirect searches, gamma-ray experiments, Imaging Air Cherenkov Telescopes, dwarf spheroidal galaxies, Segue 1, Gamma ray experiments, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, Gamma ray astronomy, Satellite galaxy, Astronomia de raigs gamma, ddc:530, 010306 general physics, Dwarf galaxies, Dwarf galaxy, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Annihilation, Telescopis, 010308 nuclear & particles physics, Bremsstrahlung, Astronomy and Astrophysics, Segue, Galaxies, dwarfs galaxies, Galàxies, High Energy Physics - Phenomenology, Dark matter experiments, Dark matter (Astronomy), dark matter experiments, gamma ray experiments, Monochromatic color, Matèria fosca (Astronomia), Astrophysics - High Energy Astrophysical Phenomena, Telescopes
Abstract

Aleksic, J. et al., We present the results of stereoscopic observations of the satellite galaxy Segue 1 with the MAGIC Telescopes, carried out between 2011 and 2013. With almost 160 hours of good-quality data, this is the deepest observational campaign on any dwarf galaxy performed so far in the very high energy range of the electromagnetic spectrum. We search this large data sample for signals of dark matter particles in the mass range between 100 GeV and 20 TeV. For this we use the full likelihood analysis method, which provides optimal sensitivity to characteristic gamma-ray spectral features, like those expected from dark matter annihilation or decay. In particular, we focus our search on gamma-rays produced from different final state Standard Model particles, annihilation with internal bremsstrahlung, monochromatic lines and box-shaped signals. Our results represent the most stringent constraints to the annihilation cross-section or decay lifetime obtained from observations of satellite galaxies, for masses above few hundred GeV. In particular, our strongest limit (95% confidence level) corresponds to a ~ 500 GeV dark matter particle annihilating into τ+τ−, and is of order langleσannvrangle simeq 1.2 × 10−24 cm3 s−1 — a factor ~ 40 above the langleσannvrangle simeq thermal value., The support of the German BMBF and MPG, the Italian INFN, the Swiss National Fund SNF, and the Spanish MICINN is gratefully acknowledged. This work was also supported by the CPAN CSD2007-00042 and MultiDark CSD2009-00064 projects of the Spanish Consolider- Ingenio 2010 programme, by grant 127740 of the Academy of Finland, by the DFG Cluster of Excellence “Origin and Structure of the Universe”, by the Croatian Science Foundation Project 09/176, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, and by the Polish MNiSzW grant 745/N-HESS-MAGIC/2010/0.

Published
2014

10. Indirect dark matter searches in the dwarf satellite galaxy Ursa Major II with the MAGIC telescopes

Author

R. J. García López, Chiara Righi, D. Dominis Prester, P. Temnikov, J. Becerra González, M. Hayashida, Cosimo Nigro, M. Nievas Rosillo, J. Kushida, Massimo Persic, A. De Angelis, A. Treves, Vitaly Neustroev, Jose Luis Contreras, S. Paiano, M. Lopez, Satoshi Masuda, Karl Mannheim, Ignasi Reichardt, I. Snidaric, D. Kuveždić, M. I. Martínez, D. Zarić, Juan Cortina, V. Fallah Ramazani, Nikola Godinovic, M. Garczarczyk, Mosè Mariotti, Aaron Dominguez, Arka Chatterjee, Francesco Longo, J. E. Ward, Alessandro Carosi, D. Fidalgo, Marc Ribó, Stefano Ansoldi, Tomislav Terzić, Christian Fruck, Abelardo Moralejo, Ievgen Vovk, Sabrina Einecke, Riccardo Paoletti, Dario Hrupec, E. Prandini, Daniela Dorner, N. Torres-Albà, Dariusz Gora, P. Bangale, G. Pedaletti, Sidika Merve Colak, Julian Sitarek, J. M. Paredes, Mitsunari Takahashi, G. Maneva, T. Schweizer, P. G. Prada Moroni, J. Hose, Hidetoshi Kubo, Antonio Stamerra, K. Nishijima, Daniela Hadasch, R. Ch. Berse, M. Gaug, G. Vanzo, Jose Miguel Miranda, Yusuke Konno, Adrian Biland, M. Minev, Marcel Strzys, Masahiro Teshima, J. Herrera, Razmik Mirzoyan, U. Barres de Almeida, M. Vazquez Acosta, Wolfgang Rhode, M. Delfino, Koji Noda, Damir Lelas, Martin Makariev, L. Nogués, Elisa Bernardini, K. Nilsson, J. Rico, Victoria Moreno, Oscar Blanch, Saverio Lombardi, Francesco Dazzi, A. Fernández-Barral, B. De Lotto, G. Bonnoli, Dorota Sobczyńska, D. Ninci, Andrea Rugliancich, Tarek M. Hassan, W. Bednarek, Fabrizio Tavecchio, J. Palacio, B. Banerjee, C. Arcaro, M. Peresano, Jordi Delgado, Ivica Puljak, Pierre Colin, F. Di Pierro, Ll. Font, Camilla Maggio, Max Ludwig Ahnen, D. Elsaesser, P. Da Vela, P. Giammaria, Dominik Baack, Kazuma Ishio, T. Surić, Shimpei Tsujimoto, Rodolfo Carosi, L. Maraschi, Elina Lindfors, Daniel Mazin, A. Berti, E. Colombo, Stefano Covino, L. O. Takalo, Pratik Majumdar, M. V. Fonseca, Tomoki Saito, Giovanni Ceribella, Louis Antonelli, T. Nagayoshi, Martin Will, Juan Abel Barrio, Ana Babić, J. R. Garcia, A. Niedzwiecki, David Paneque, Wrijupan Bhattacharyya, D. Guberman, K. Mielke, E. Moretti, Marina Manganaro, D. Galindo, P. Cumani, Konstancja Satalecka, Michele Doro, Alexander Hahn, Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Arcaro, C., Baack, D., Babić, A., Banerjee, B., Bangale, P., de Almeida, U. Barre, Barrio, J. A., González, J. Becerra, Bednarek, W., Bernardini, E., Berse, R. Ch., Berti, A., Bhattacharyya, W., Biland, A., Blanch, O., Bonnoli, G., Carosi, R., Carosi, A., Ceribella, G., Chatterjee, A., Colak, S. M., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., Vela, P. Da, Dazzi, F., Angelis, A. De, Lotto, B. De, Delfino, M., Delgado, J., Pierro, F. Di, Domínguez, A., Prester, D. Domini, Dorner, D., Doro, M., Einecke, S., Elsaesser, D., Ramazani, V. Fallah, Fernández-Barral, A., Fidalgo, D., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., López, R. J. García, Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Gora, D., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Ishio, K., Konno, Y., Kubo, H., Kushida, J., Kuveždić, D., Lelas, D., Lindfors, E., Lombardi, S., Longo, F., López, M., Maggio, C., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Masuda, S., Mazin, D., Mielke, K., Minev, M., Miranda, J. M., Mirzoyan, R., Moralejo, A., Moreno, V., Moretti, E., Nagayoshi, T., Neustroev, V., Niedzwiecki, A., Rosillo, M. Nieva, Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogués, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Pedaletti, G., Peresano, M., Persic, M., Moroni, P. G. Prada, Prandini, E., Puljak, I., Garcia, J. R., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Saito, T., Satalecka, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Stamerra, A., Strzys, M., Surić, T., Takahashi, M., Takalo, L., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Torres-Albà, N., Treves, A., Tsujimoto, S., Vanzo, G., Acosta, M. Vazquez, Vovk, I., Ward, J. E., Will, M., and Zarić, D.

Subjects
supersymmetry and cosmology, High energy, Ursa Major, Milky Way, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, FOS: Physical sciences, gamma ray experiments, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, dark matter, dwarf spheroidal satellite galaxies, indirect searches, Imaging Air Cherenkov Telescopes, Ursa Major II, 01 natural sciences, Dark Matter, Gamma-rays, High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, Satellite galaxy, ddc:530, MAGIC (telescope), 010303 astronomy & astrophysics, dark matter experiments, dwarfs galaxies, Astrophysics::Galaxy Astrophysics, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Annihilation, 010308 nuclear & particles physics, Astronomy and Astrophysics, Dwarf spheroidal galaxy, High Energy Physics - Phenomenology, Física nuclear, Astrophysics - High Energy Astrophysical Phenomena
Abstract

Journal of cosmology and astroparticle physics 2018(03), 009 (2018). doi:10.1088/1475-7516/2018/03/009, The dwarf spheroidal galaxy Ursa Major II (UMaII) is believed to be one of the most dark-matter dominated systems among the Milky Way satellites and represents a suitable target for indirect dark matter (DM) searches. The MAGIC telescopes carried out a deep observation campaign on UMaII between 2014 and 2016, collecting almost one hundred hours of good-quality data. This campaign enlarges the pool of DM targets observed at very high energy (E $\gtrsim$ 50 GeV) in search for signatures of DM annihilation in the wide massrange between ∼100 GeV and ∼100 TeV. To this end, the data are analyzed with the full likelihood analysis, a method based on the exploitation of the spectral information of the recorded events for an optimal sensitivity to the explored DM models. We obtain constraints on the annihilation cross-section for different channels that are among the most robust and stringent achieved so far at the TeV mass scale from observations of dwarf satellite galaxies., Published by IOP, London

Catalog

Books, media, physical & digital resources
See catalog results