Discovery of VHE γ-rays from centaurus a

H.E.S.S. Collaboration

Discovery of VHE γ-rays from centaurus a

H.E.S.S. Collaboration

Research output: Contribution to conference › Paper › peer-review

Abstract

We report the discovery of faint very high energy (VHE, E > 100 GeV) γ-ray emission from the radio galaxy Centaurus A in deep observations performed with the H.E.S.S. experiment. A signal with a statistical significance of 5.0 σ is detected from the region including the radio core and the inner kpc jets. The integral flux above an energy threshold of ∼250 GeV is measured to be 0.8 % of the flux of the Crab Nebula and the spectrum can be described by a power law with a photon index of 2.7 ± 0.5stat ± 0.2sys. No significant flux variability is detected in the data set. The discovery of VHE γ-ray emission from Centaurus A reveals particle acceleration in the source to > TeV energies and, together with M 87, establishes radio galaxies as a class of VHE emitters.

Original language	English
Pages	63-66
Number of pages	4
Publication status	Published - 1 Jan 2009
Externally published	Yes
Event	44th Rencontres de Moriond on Very High Energy Phenomena in the Universe, VHEPU 2009 - La Thuile, Italy Duration: 1 Feb 2009 → 8 Feb 2009

Conference

Conference	44th Rencontres de Moriond on Very High Energy Phenomena in the Universe, VHEPU 2009
Country/Territory	Italy
City	La Thuile
Period	1/02/09 → 8/02/09

Cite this

@conference{6e7b1c4f0f884b9c9f5e3b76fcf09f40,

title = "Discovery of VHE γ-rays from centaurus a",

abstract = "We report the discovery of faint very high energy (VHE, E > 100 GeV) γ-ray emission from the radio galaxy Centaurus A in deep observations performed with the H.E.S.S. experiment. A signal with a statistical significance of 5.0 σ is detected from the region including the radio core and the inner kpc jets. The integral flux above an energy threshold of ∼250 GeV is measured to be 0.8 \% of the flux of the Crab Nebula and the spectrum can be described by a power law with a photon index of 2.7 ± 0.5stat ± 0.2sys. No significant flux variability is detected in the data set. The discovery of VHE γ-ray emission from Centaurus A reveals particle acceleration in the source to > TeV energies and, together with M 87, establishes radio galaxies as a class of VHE emitters.",

author = "\{H.E.S.S. Collaboration\} and M. Raue and Lenain, \{J. P.\} and Aharonian, \{F. A.\} and Y. Becherini and C. Boisson and Clapson, \{A. C.\} and L. Costamante and L. G{\'e}rard and C. Medina and \{de Naurois\}, M. and M. Punch and F. Rieger and H. Sol and L. Stawarz and A. Zech",

note = "Publisher Copyright: {\textcopyright} Th{\^e} Gioi Publishers, 2009.; 44th Rencontres de Moriond on Very High Energy Phenomena in the Universe, VHEPU 2009 ; Conference date: 01-02-2009 Through 08-02-2009",

year = "2009",

month = jan,

day = "1",

language = "English",

pages = "63--66",

}

TY - CONF

T1 - Discovery of VHE γ-rays from centaurus a

AU - H.E.S.S. Collaboration

AU - Raue, M.

AU - Lenain, J. P.

AU - Aharonian, F. A.

AU - Becherini, Y.

AU - Boisson, C.

AU - Clapson, A. C.

AU - Costamante, L.

AU - Gérard, L.

AU - Medina, C.

AU - de Naurois, M.

AU - Punch, M.

AU - Rieger, F.

AU - Sol, H.

AU - Stawarz, L.

AU - Zech, A.

PY - 2009/1/1

Y1 - 2009/1/1

N2 - We report the discovery of faint very high energy (VHE, E > 100 GeV) γ-ray emission from the radio galaxy Centaurus A in deep observations performed with the H.E.S.S. experiment. A signal with a statistical significance of 5.0 σ is detected from the region including the radio core and the inner kpc jets. The integral flux above an energy threshold of ∼250 GeV is measured to be 0.8 % of the flux of the Crab Nebula and the spectrum can be described by a power law with a photon index of 2.7 ± 0.5stat ± 0.2sys. No significant flux variability is detected in the data set. The discovery of VHE γ-ray emission from Centaurus A reveals particle acceleration in the source to > TeV energies and, together with M 87, establishes radio galaxies as a class of VHE emitters.

AB - We report the discovery of faint very high energy (VHE, E > 100 GeV) γ-ray emission from the radio galaxy Centaurus A in deep observations performed with the H.E.S.S. experiment. A signal with a statistical significance of 5.0 σ is detected from the region including the radio core and the inner kpc jets. The integral flux above an energy threshold of ∼250 GeV is measured to be 0.8 % of the flux of the Crab Nebula and the spectrum can be described by a power law with a photon index of 2.7 ± 0.5stat ± 0.2sys. No significant flux variability is detected in the data set. The discovery of VHE γ-ray emission from Centaurus A reveals particle acceleration in the source to > TeV energies and, together with M 87, establishes radio galaxies as a class of VHE emitters.

UR - https://www.scopus.com/pages/publications/85091756570

M3 - Paper

AN - SCOPUS:85091756570

SP - 63

EP - 66

T2 - 44th Rencontres de Moriond on Very High Energy Phenomena in the Universe, VHEPU 2009

Y2 - 1 February 2009 through 8 February 2009

ER -

Discovery of VHE γ-rays from centaurus a

Abstract

Conference

Other files and links

Fingerprint

Cite this