Discovery of Very High Energy Gamma Rays Associated with an X-ray Binary

Aharonian, F.; Akhperjanian, A. G.; Aye, K.-M.; Bazer‐Bachi, A. R.; Beilicke, M.; Benbow, W.; Berge, D.; Berghaus, P.; Bernlöhr, K.; Boisson, C.; Bolz, O.; Borrel, V.; Braun, I.; Breitling, F.; Brown, A. M.; Gordo, J. Bussons; Chadwick, P. M.; Chounet, L.‐M.; Cornils, R.; Costamante, L.; Degrange, B.; Dickinson, H. J.; Djannati‐Ataï, A.; Drury, L. O’c.; Dubus, G.; Emmanoulopoulos, D.; Espigat, P.; Feinstein, F.; Fleury, P.; Fontaine, G.; Fuchs, Y.; Funk, S.; Gallant, Y. A.; Giebels, B.; Gillessen, S.; Glicenstein, J. F.; Goret, P.; Hadjichristidis, C.; Hauser, M.; Heinzelmann, G.; Henri, G.; Hermann, G.; Hinton, J. A.; Hofmann, W.; Holleran, M.; Horns, D.; Jachołkowska, A.; Jager, O. C. de; Khélifi, B.; Komin, Nu.; Konopelko, A.; Latham, I. J.; Gallou, R. Le; Lemière, A.; Lemoine‐Goumard, M.; Leroy, N.; Löhse, T.; Marcowith, A.; Martin, Jean‐Michel; Martineau‐Huynh, O.; Masterson, C.; McComb, T. J. L.; Naurois, M. de; Nolan, S. J.; Noutsos, A.; Orford, K. J.; Osborne, J. L.; Ouchrif, M.; Panter, M.; Pelletier, G.; Pita, S.; Pühlhofer, G.; Punch, M.; Raubenheimer, Britt; Raue, M.; Raux, J.; Rayner, S. M.; Reimer, A.; Ripken, J.; Rob, L.; Rolland, L.; Rowell, G.; Sahakian, V.; Saugé, L.; Schlenker, S.; Schlickeiser, R.; Schuster, C.; Schwanke, U.; Siewert, M.; Sol, H.; Spangler, D.; Steenkamp, R.; Stegmann, C.; Tavernet, J.‐P.; Terrier, R.; Théoret, C. G.; Tluczykont, M.; Vasileiadis, G.; Venter, C.; Vincent, P.; Völk, H. J.; Wagner, S. J.

doi:10.1126/science.1113764

Cited by 342 publications

(326 citation statements)

References 24 publications

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“…3EG J2016+3657 [15], (2) PWN, suggested both from studying the Crab offpulse emission [16], as well as from numerous positional coincidences between energetic pulsars and unidentified gamma-ray sources, and (3) Microquasars, as impressively confirmed by the detection of LS5039 with H.E.S.S. [17] (possible associated with 3EG J1824-1514) and LSI 61 • 303 with MAGIC [18] (possible associated with 3EG J0241+6103). Since the H.E.S.S.…”

Section: Contributed To the Multi-messenger Approach To Unidentified mentioning

confidence: 84%

Demystifying an unidentified EGRET source by VHE gamma-ray observations

Reimer

Funk

2007

The Multi-Messenger Approach to High-Energy Gamma-Ray Sources

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In a novel approach in observational highenergy gamma-ray astronomy, observations carried out by imaging atmospheric Cherenkov telescopes provide necessary templates to pinpoint the nature of intriguing, yet unidentified EGRET gamma-ray sources. Using GeV-photons detected by CGRO EGRET and taking advantage of high spatial resolution images from H.E.S.S. observations, we were able to shed new light on the EGRET observed gamma-ray emission in the Kookaburra complex, whose previous coverage in the literature is somewhat contradictory. 3EG J1420-6038 very likely accounts for two GeV gamma-ray sources (E > 1 GeV), both in positional coincidence with the recently reported pulsar wind nebulae (PWN) by HESS in the Kookaburra/Rabbit complex. PWN associations at VHE energies, supported by accumulating evidence from observations in the radio and X-ray band, are indicative for the PSR/plerionic origin of spatially coincident, but still unidentified Galactic gamma-ray sources from EGRET. This not only supports the already suggested connection between variable, but unidentified low-latitude gamma-ray sources with pulsar wind nebulae (3EG J1420-6038 has been suggested as PWN candidate previoulsy), it also documents the ability of resolving apparently confused EGRET sources by connecting the GeV emission as measured from a large-aperture space-based gamma-ray instrument with narrow field-of-view but superior spatial resolution observations by ground-based atmospheric Cherenkov tele-

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Section: Contributed To the Multi-messenger Approach To Unidentified mentioning

confidence: 84%

Demystifying an unidentified EGRET source by VHE gamma-ray observations

Reimer

Funk

2007

The Multi-Messenger Approach to High-Energy Gamma-Ray Sources

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“…The discovery of the microquasar LS 5039, a high-mass X-ray binary (XRB) with relativistic jets, and its association with the high-energy gamma-ray source 3EG J1824−1514 (Paredes et al 2000), opened the possibility that some other unidentified EGRET sources (Hartman et al 1999) could also be microquasars. That microquasars can be high-energy gamma-ray emitters has been confirmed by the ground-based Cherenkov telescope HESS, that detected a TeV source whose very small 3-σ error box contains LS 5039 (Aharonian et al 2005). In addition, high-mass microquasars have been proposed to be counterparts of at least a significant fraction of the low galactic latitude unidentified variable EGRET sources (e.g.…”

Section: Introductionmentioning

confidence: 82%

“…Generally, if the mechanism of emission were hadronic, the spectra would be harder. Moreover, comparing with two microquasar candidates likely to be gamma-ray sources, LS 5039 and LS I +61 303, the electron maximum energies for these two cases (Bosch-Ramon & Paredes 2004a,b;Aharonian et al 2005) seem to be significantly higher than for the sources treated here, likely pointing to a more efficient acceleration mechanism. In addition, if the sources were microquasars, the dominant emitting process at high energies likely would be SSC.…”

Section: Gro J1411−64mentioning

confidence: 93%

A microquasar model applied to unidentified gamma-ray sources

Bosch‐Ramon¹,

Paredes²,

Romero

et al. 2006

A&A

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Among unidentified gamma-ray sources in the galactic plane, there are some that present significant variability and have been proposed to be high-mass microquasars. To deepen the study of the possible association between variable low galactic latitude gamma-ray sources and microquasars, we have applied a leptonic jet model based on the microquasar scenario that reproduces the gamma-ray spectrum of three unidentified gamma-ray sources, 3EG J1735−1500, 3EG J1828+0142 and GRO J1411−64, and is consistent with the observational constraints at lower energies. We conclude that if these sources were generated by microquasars, the particle acceleration processes could not be as efficient as in other objects of this type that present harder gamma-ray spectra. Moreover, the dominant mechanism of high-energy emission should be synchrotron self-Compton (SSC) scattering, and the radio jets may only be observed at low frequencies. For each particular case, further predictions of jet physical conditions and variability generation mechanisms have been made in the context of the model. Although there might be other candidates able to explain the emission coming from these sources, microquasars cannot be excluded as counterparts. Observations performed by the next generation of gamma-ray instruments, like GLAST, are required to test the proposed model.

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“…Cygnus X-1). Some of them are suspected to be gamma-ray sources [9][10][11][12] and can presumably lead also to neutrino production through photohadron [13,14] or proton-proton [15][16][17][18] interactions.…”

Section: Introductionmentioning

confidence: 99%

Neutrino signals from galactic binaries

Christiansen¹

2007

Braz. J. Phys.

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We analyze the possible origin of high-energy neutrinos coming from galactic sources. A model is proposed for neutrino hadroproduction in binary systems. Our results show that neutrino observatories like IceCube can establish whether TeV neutrinos and gamma rays emitted by microquasars are the decay products of pions. Such pions can be produced where the jet collides with the stellar wind of the companion star giving rise to hadronic interactions. We improve previous predictions by considering energy dependent pion multiplicities, particularly significant at high energies, and the most recent values for the parameters of the system. We also discuss the gamma-ray flux associated with neutrino emission.

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Discovery of Very High Energy Gamma Rays Associated with an X-ray Binary

Cited by 342 publications

References 24 publications

Demystifying an unidentified EGRET source by VHE gamma-ray observations

Demystifying an unidentified EGRET source by VHE gamma-ray observations

A microquasar model applied to unidentified gamma-ray sources

Neutrino signals from galactic binaries

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