SPECTRAL ANALYSIS AND INTERPRETATION OF THE gamma-RAY EMISSION FROM THE STARBURST GALAXY NGC 253

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10127226" target="_blank" >RIV/00216208:11320/12:10127226 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1088/0004-637X/757/2/158" target="_blank" >http://dx.doi.org/10.1088/0004-637X/757/2/158</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0004-637X/757/2/158" target="_blank" >10.1088/0004-637X/757/2/158</a>

Result language

angličtina

Original language name

SPECTRAL ANALYSIS AND INTERPRETATION OF THE gamma-RAY EMISSION FROM THE STARBURST GALAXY NGC 253

Original language description

Very high energy (VHE; E }= 100 GeV) and high-energy (HE; 100 MeV {= E {= 100 GeV) data from gamma-ray observations performed with the H. E. S. S. telescope array and the Fermi-LAT instrument, respectively, are analyzed in order to investigate the non-thermal processes in the starburst galaxy NGC 253. The VHE gamma-ray data can be described by a power law in energy with differential photon index Gamma = 2.14 +/- 0.18(stat) +/- 0.30(sys) and differential flux normalization at 1 TeV of F-0 = (9.6 +/- 1.5(stat)(+5.7, -2.9)(sys)) x 10(-14) TeV-1 cm(-2) s(-1). A power-law fit to the differential HE gamma-ray spectrum reveals a photon index of Gamma = 2.24 +/- 0.14(stat) +/- 0.03(sys) and an integral flux between 200 MeV and 200 GeV of F(0.2-200 GeV) = (4.9+/- 1.0(stat) +/- 0.3(sys)) x 10(-9) cm(-2) s(-1). No evidence for a spectral break or turnover is found over the dynamic range of both the LAT instrument and the H.E.S.S. experiment: a combined fit of a power law to the HE and VHE gamma-

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BF - Elementary particle theory and high energy physics

OECD FORD branch

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Project

<a href="/en/project/GPP203%2F11%2FP363" target="_blank" >GPP203/11/P363: Study of Very High Energy Cosmic Gamma Rays with the H.E.S.S. experiment</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2012

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astrophysical Journal

ISSN

0004-637X

e-ISSN

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Volume of the periodical

757

Issue of the periodical within the volume

2

Country of publishing house

US - UNITED STATES

Number of pages

12

Pages from-to

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UT code for WoS article

000309108500051

EID of the result in the Scopus database

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