The H.E.S.S. Survey of the Inner Galaxy in Very High Energy Gamma Rays

Aharonian, F.; Akhperjanian, A. G.; Bazer‐Bachi, A. R.; Beilicke, M.; Benbow, W.; Berge, D.; Bernlöhr, K.; Boisson, C.; Bolz, O.; Borrel, V.; Braun, I.; Breitling, F.; Brown, A. M.; 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.; 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.; Martin, Jean‐Michel; Martineau‐Huynh, O.; Marcowith, A.; 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.; Reimer, O.; 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:10.1086/498013

Cited by 536 publications

(575 citation statements)

References 74 publications

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“…First, using 1 yr of Fermi-LAT data, Abdo et al (2010a) showed that the γ-ray source is best fit by an elliptical ring in perfect coincidence with the shell, implying that the emission is Figure 9. Left: SEDs of the star-forming region W30 by combining data from this analysis (black stars and dashed butterfly), from the 2FHL catalog (blue diamonds and line), from the SNR catalog (purple line), and from IACT (red triangles and line; Aharonian et al 2006a). Middle and right: background-subtracted TS maps of W30 using the same conventions as in Figure 3 and above-quoted references for the IACT contours shown in green.…”

Section: Hess J1841−055 (Fges J18394−0554 and Fges J18414mentioning

confidence: 99%

“…Several surveys of the Galaxy have been undertaken at TeV γ-ray energies (e.g., Aharonian et al 2006a) by the current Instrument Atmospheric Cherenkov Telescopes (IACTs) revealing different classes of astrophysical sources such as supernova remnants (SNRs), pulsar wind nebulae (PWNe), and molecular clouds (MCs; see Hewitt & Lemoine-Goumard 2015, for a review on SNRs and PWNe). Many are observed as spatially extended with respect to the angular resolution of the instruments.…”

Section: Introductionmentioning

confidence: 99%

“…Only PSR J1617−5055 is energetic enough to power the TeV emission of HESS J1616−508, and Aharonian et al (2006a) speculated that it could be a PWN powered by this young pulsar. It was detected for the first time as an extended source at GeV energies by Lande et al (2012).…”

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confidence: 99%

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Search for Extended Sources in the Galactic Plane Using Six Years of Fermi-Large Area Telescope Pass 8 Data above 10 GeV

Ackermann

Ajello

Baldini

et al. 2017

ApJ

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The spatial extension of a γ-ray source is an essential ingredient to determine its spectral properties, as well as its potential multiwavelength counterpart. The capability to spatially resolve γ-ray sources is greatly improved by the newly delivered Fermi-Large Area Telescope (LAT) Pass 8 event-level analysis, which provides a greater acceptance and an improved point-spread function, two crucial factors for the detection of extended sources. Here, we present a complete search for extended sources located within 7°from the Galactic plane, using 6 yr of Fermi-LAT data above 10 GeV. We find 46 extended sources and provide their morphological and spectral characteristics. This constitutes the first catalog of hard Fermi-LAT extended sources, named the Fermi Galactic Extended Source Catalog, which allows a thorough study of the properties of the Galactic plane in the sub-TeV domain.

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Section: Hess J1841−055 (Fges J18394−0554 and Fges J18414mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Search for Extended Sources in the Galactic Plane Using Six Years of Fermi-Large Area Telescope Pass 8 Data above 10 GeV

Ackermann

Ajello

Baldini

et al. 2017

ApJ

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“…HESS observations (2004)(2005)(2006) of the galactic plane allowed to discover more than 20 VHE sources [85]. Some of them have been identified owing to their counterparts at other wavelengths, but almost half of the sources have no obvious counterpart and are still unidentified [86].…”

Section: Resultsmentioning

confidence: 99%

Search for gamma rays from dark matter annihilations around intermediate mass black holes with the HESS experiment

Aharonian

Büsching²,

Jager

et al. 2008

Phys. Rev. D

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“…As for both maps 1 px = 0.125 • , the area considered is similar to the trial extension used in the H.E.S.S. GPS scan for source discovery (radius = 0.22 • , see Aharonian et al 2006). The error on the source localization is typically smaller than the pixel size considered here.…”

Section: The Inner Gps Sourcesmentioning

confidence: 99%

On the possible correlation of Galactic very-high energy source locations and enhancements of the surface density in the Galactic plane

Pedaletti

Wilhelmi

Torres

2014

A&A

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Aims. The association of very-high energy sources with regions of the sky rich in dust and gas has been noticed in the study of individual very-high energy (VHE; E > ∼ 100 GeV) sources. However, the statistical significance of this correlation for the whole population of TeV detections has not been assessed yet. Here, we present a study of the association of VHE sources in the central Galactic region with positions of enhanced material content. Methods. We obtain estimates of the material content through two classical tracers: dust emission and intensity of the 12 CO(1 → 0) line. We make use of the recently released all-sky maps of astrophysical foregrounds of the Planck Collaboration, and of an extensive existing CO mapping of the Galactic sky. To test the correlation, we construct randomized samples of VHE source positions starting from the inner Galactic plane survey sources detected by the High Energy Stereoscopic System (H.E.S.S.) array. Results. We find hints of a positive correlation between positions of VHE sources and regions rich in molecular material, which reaches the 3.9σ level in the best of cases. The latter confidence is however decreased if variations in the selection criteria are considered, which lead us to conclude that a positive correlation cannot be firmly established yet. Forthcoming VHE facilities will be needed to firmly establish the correlation.

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The H.E.S.S. Survey of the Inner Galaxy in Very High Energy Gamma Rays

Cited by 536 publications

References 74 publications

Search for Extended Sources in the Galactic Plane Using Six Years of Fermi-Large Area Telescope Pass 8 Data above 10 GeV

Search for Extended Sources in the Galactic Plane Using Six Years of Fermi-Large Area Telescope Pass 8 Data above 10 GeV

Search for gamma rays from dark matter annihilations around intermediate mass black holes with the HESS experiment

On the possible correlation of Galactic very-high energy source locations and enhancements of the surface density in the Galactic plane

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