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Discovery of very-high-energy gamma-ray emission from the vicinity of PSR J1913+1011 with HESS

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posted on 2012-10-24, 08:53 authored by F. Aharonian, A. G. Akhperjanian, de Almeida UB, A. R. Bazer-Bachi, B. Behera, M. Beilicke, W. Benbow, K. Bernloehr, C. Boisson, O. Bolz, V. Borrel, M. Hauser, S. Hoppe, G. Heinzelmann, A. Jacholkowska, de Jager OC, I. Jung, K. Katarzynski, E. Kendziorra, G. Puehlhofer, G. Pelletier, M. Panter, M. Kerschhaggl, B. Khelifi, D. Keogh, N. Komin, K. Kosack, G. Lamanna, I. J. Latham, A. Lemiere, M. Lemoine-Goumard, J. -. P. Lenain, M. Raue, P. -. O. Petrucci, M. Punch, T. Lohse, J. M. Martin, O. Martineau-Huynh, A. Marcowith, C. Masterson, D. Maurin, G. Maurin, T. J. L. McComb, G. Pedaletti, R. Moderski, S. Pita, E. Moulin, B. C. Raubenheimer, de Naurois M, D. Nedbal, S. J. Nolan, S. Ohm, J. -. P. Olive, E. D. O. Wilhelmi, O. Reimer, K. J. Orford, J. L. Osborne, S. M. Rayner, M. Ostrowski, M. Renaud, J. Ripken, L. Rob, L. Rolland, I. Braun, M. Ward, F. Volpe, S. Rosier-Lees, G. Rowell, B. Rudak, J. Ruppel, V. Sahakian, A. Santangelo, R. Schlickeiser, F. Schoeck, R. Schroeder, U. Schwanke, R. Buehler, A. A. Zdziarski, E. Brion, S. Schwarzburg, S. Schwemmer, A. Shalchi, H. Sol, D. Spangler, L. Stawarz, R. Steenkamp, C. Stegmann, S. J. Wagner, G. Superina, A. Zech, P. H. Tam, A. M. Brown, J. -. P. Tavernet, R. Terrier, van Eldik C, G. Vasileiadis, C. Venter, J. P. Vialle, I. Buesching, P. Vincent, M. Vivier, T. Bulik, H. J. Voelk, T. Boutelier, S. Carrigan, P. M. Chadwick, L. -. M. Chounet, A. C. Clapson, A. Hoffmann, G. Henri, G. Coignet, R. Cornils, L. Costamante, M. Dalton, B. Degrange, H. J. Dickinson, A. Djannati-Atai, W. Domainko, L. O. Drury, F. Dubois, G. Hermann, W. Hofmann, G. Dubus, J. Dyks, K. Egberts, D. Emmanoulopoulos, P. Espigat, C. Farnier, F. Feinstein, A. Fiasson, A. Foerster, J. A. Hinton, G. Fontaine, M. Holleran, S. Funk, M. Fuessling, Y. A. Gallant, B. Giebels, J. F. Glicenstein, B. Glueck, P. Goret, C. Hadjichristidis, D. Horns, D. Hauser
The HESS experiment, an array of four Imaging Atmospheric Cherenkov Telescopes with high sensitivity and large field-of-view, has been used to search for emitters of very-high-energy (VHE, >100 GeV) $\gamma$-rays along the Galactic plane, covering the region 30° $<\, l\, <$ 60°, 280° $<\, l\, <$ 330°, and -3° $<\, b\, <$ 3°. In this continuation of the HESS Galactic Plane Scan, a new extended VHE $\gamma$-ray source was discovered at $\alpha_{2000}$=19$^{\rm h}$12$^{\rm m}$49$^{\rm s}$, $\delta_{2000}$=+10°09´06´´(HESS J1912+101). Its integral flux between 1-10 TeV is ~10% of the Crab Nebula flux in the same energy range. The measured energy spectrum can be described by a power law d $N/{\rm d}E \, \sim \, E^{-\Gamma}$ with a photon index $\Gamma = 2.7 \pm 0.2_{\mbox{stat}}\pm 0.3_{\mbox{sys}}$. HESS J1912+101 is plausibly associated with the high spin-down luminosity pulsar PSR J1913+1011. We also discuss associations with an as yet unconfirmed SNR candidate proposed from low frequency radio observation and/or with molecular clouds found in 13CO data.



Astronomy & Astrophysics, 2008, 484 (2), pp. 435-440


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