Discovery of VHE emission towards the Carina arm region with the H.E.S.S. telescope array: HESS? J1018-589

Abramowski A, Acero F, Aharonian F, Akhperjanian AG, Anton G, Balzer A, Barnacka A, Becherini Y, Becker J, Bernloehr K, Birsin E, Biteau J, Bochow A, Boisson C, Bolmont J, Bordas P, Brucker J, Brun F, Brun P, Bulik T, Buesching I, Carrigan S, Casanova S, Cerruti M, Chadwick PM, Charbonnier A, Chaves RCG, Cheesebrough A, Cologna G, Conrad J, Dalton M, Daniel MK, Davids ID, Degrange B, Deil C, Dickinson HJ, Djannati-Atai A, Domainko W, Drury LO, Dubus G, Dutson K, Dyks J, Dyrda M, Egberts K, Eger P, Espigat P, Fallon L, Fegan S, Feinstein F, Fernandes MV, Fiasson A, Fontaine G, Foerster A, Fuessling M, Gallant YA, Gast H, Gerard L, Gerbig D, Giebels B, Glicenstein JF, Glueck B, Göring D, Häffner S, Hague JD, Hahn J, Hampf D, Harris J, Hauser M, Heinz S, Heinzelmann G, Henri G, Hermann G, Hillert A, Hinton JA, Hofmann W, Hofverberg P, Holler M, Horns D, Jacholkowska A, De Jager OC, Jahn C, Jamrozy M, Jung I, Kastendieck MA, Katarzynski K, Katz U, Kaufmann S, Keogh D, Khelifi B, Klochkov D, Kluzniak W, Kneiske TM, Komin N, Kosack K, Kossakowski R, Krayzel F, Laffon H, Lamanna G, Lenain JP, Lennarz D, Lohse T, Lopatin A, Lu CC, Marandon V, Marcowith A, Masbou J, Maxted NI, Mayer M, Mccomb TJL, Medina MC, Mehault J, Moderski R, Mohamed M, Moulin E, Naumann CL, Naumann-Godo M, De Naurois M, Nedbal D, Nekrassov D, Nguyen N, Nicholas B, Niemiec J, Nolan SJ, Ohm S, Wilhelmi EDO, Opitz B, Ostrowski M, Oya I, Panter M, Arribas MP, Pekeur NW, Pelletier G, Perez J, Petrucci PO, Peyaud B, Pita S, Pühlhofer G, Punch M, Quirrenbach A, Raue M, Rayner SM, Reimer A, Reimer O, Renaud M, De Los Reyes R, Rieger F, Ripken J, Rob L, Rosier-Lees S, Rowell G, Rudak B, Rulten CB, Sahakian V, Sanchez DA, Santangelo A, Schlickeiser R, Schulz A, Schwanke U, Schwarzburg S, Schwemmer S, Sheidaei F, Skilton JL, Sol H, Spengler G, Stawarz L, Steenkamp R, Stegmann C, Stinzing F, Stycz K, Sushch I, Szostek A, Tavernet JP, Terrier R, Tluczykont M, Valerius K, van Eldik C, Vasileiadis G, Venter C, Viana A, Vincent P, Voelk HJ, Volpe F, Vorobiov S, Vorster M, Wagner SJ, Ward M, White R, Wierzcholska A, Zacharias M, Zajczyk A, Zdziarski AA, Zech A, Zechlin HS (2012)

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2012

Journal

Publisher: EDP Sciences

Book Volume: 541

Article Number: A5

DOI: 10.1051/0004-6361/201218843

Abstract

The Carina arm region, containing the supernova remnant SNR? G284.3-1.8, the high-energy (HE; E > 100 MeV) binary 1FGL? J1018.6-5856 and the energetic pulsar PSR? J1016-5857 and its nebula, has been observed with the H.E.S.S. telescope array. The observational coverage of the region in very-high-energy (VHE; E > 0.1? TeV) γ-rays benefits from deep exposure (40? h) of the neighboring open cluster Westerlund 2. The observations have revealed a new extended region of VHE γ-ray emission. The new VHE source HESS? J1018-589 shows a bright, point-like emission region positionally coincident with SNR? G284.3-1.8 and 1FGL? J1018.6-5856 and a diffuse extension towards the direction of PSR? J1016-5857. A soft (Γ = 2.7 ± 0.5) photon? index, with a differential flux at 1? TeV of N = (4.2 ± 1.1) × 10? TeV? cm? s is found for the point-like source, whereas the total emission region including the diffuse emission region is well fit by a power-law function with spectral index Γ = 2.9 ± 0.4 and differential flux at 1? TeV of N = (6.8 ± 1.6) × 10? TeV? cm? s. This H.E.S.S. detection motivated follow-up X-ray observations with the XMM-Newton satellite to investigate the origin of the VHE emission. The analysis of the XMM-Newton data resulted in the discovery of a bright, non-thermal point-like source (XMMU J101855.4-58564) with a photon index of Γ = 1.65 ± 0.08 in the center of SNR? G284.3-1.8, and a thermal, extended emission region coincident with its bright northern filament. The characteristics of this thermal emission are used to estimate the plasma density in the region as n 0.5 cm (2.9? kpc/d). The position of XMMU? J101855.4-58564 is compatible with the position reported by the Fermi-LAT collaboration for the binary system 1FGL? J1018.6-5856 and the variable Swift XRT source identified with it. The new X-ray data are used alongside archival multi-wavelength data to investigate the relationship between the VHE γ-ray emission from HESS? J1018-589 and the various potential counterparts in the Carina arm region. © ESO, 2012.

Authors with CRIS profile

Involved external institutions

University of Paris 7 - Denis Diderot / Université Paris VII Denis Diderot France (FR) National Academy of Sciences of the Republic of Armenia (NAS RA) / Հայաստանի Հանրապետության գիտությունների ազգային ակադեմիա, ՀՀ ԳԱԱ Armenia (AM) École Polytechnique - Université Paris-Saclay France (FR) Ruprecht-Karls-Universität Heidelberg Germany (DE) Universität Hamburg (UHH) Germany (DE) Max-Planck-Institut für Kernphysik (MPIK) / Max Planck Institute for Nuclear Physics Germany (DE) Commissariat à l'énergie atomique France (FR) Ruhr-Universität Bochum (RUB) Germany (DE) University of Namibia (UNAM) Namibia (NA) Durham University United Kingdom (GB) Humboldt-Universität zu Berlin Germany (DE) Stockholm University / Stockholms universitet Sweden (SE) Nicolaus Copernicus Astronomical Centre of the Polish Academy of Sciences Poland (PL) University of Leicester United Kingdom (GB) University of Montpellier / Université Montpellier France (FR) Noordwes-Universiteit / North-West University South Africa (ZA) Eberhard Karls Universität Tübingen Germany (DE) Leopold-Franzens-Universität Innsbruck / University of Innsbruck Austria (AT) University of Savoy Mont Blanc / Université Savoie Mont Blanc France (FR) Institute of Nuclear Physics Polish Academy of Sciences / Instytut Fizyki Jądrowej im. Henryka Niewodniczańskiego Polskiej Akademii Nauk Poland (PL) Jagiellonian University / Uniwersytet Jagielloński (UJ) Poland (PL) Dublin Institute for Advanced Studies (DIAS) Ireland (IE) Université Joseph Fourier (UJF Grenoble 1) France (FR) Univerzita Karlova v Praze / Charles University in Prague Czech Republic (CZ) University of Adelaide Australia (AU) Nicolaus Copernicus University (NCU) / Uniwersytet Mikołaja Kopernika w Toruniu (UMK) Poland (PL) University of Warsaw / Uniwersytet Warszawski Poland (PL)

How to cite

APA:

Abramowski, A., Acero, F., Aharonian, F., Akhperjanian, A.G., Anton, G., Balzer, A.,... Zechlin, H.-S. (2012). Discovery of VHE emission towards the Carina arm region with the H.E.S.S. telescope array: HESS? J1018-589. Astronomy & Astrophysics, 541. https://doi.org/10.1051/0004-6361/201218843

MLA:

Abramowski, A., et al. "Discovery of VHE emission towards the Carina arm region with the H.E.S.S. telescope array: HESS? J1018-589." Astronomy & Astrophysics 541 (2012).

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