Probing the extent of the non-thermal emission from the Vela X region at TeV energies with H.E.S.S
A. Abramowski
,
Fabio Acero
(1)
,
F. Aharonian
,
A. G. Akhperjanian
,
G. Anton
,
S. Balenderan
,
Agnès Balzer
,
A. Barnacka
,
Y. Becherini
(2, 3)
,
J. Becker Tjus
,
K. Bernlöhr
,
E. Birsin
,
J. Biteau
(2)
,
A. Bochow
,
C. Boisson
(4)
,
J. Bolmont
(5)
,
P. Bordas
,
J. Brucker
,
F. Brun
(2)
,
P. Brun
,
T. Bulik
,
S. Carrigan
,
S. Casanova
,
M. Cerruti
(4)
,
P. M. Chadwick
,
A. Charbonnier
(5)
,
R. C. G. Chaves
,
A. Cheesebrough
,
G. Cologna
,
J. Conrad
,
C. Couturier
,
M. Dalton
,
M. K. Daniel
,
I. D. Davids
,
B. Degrange
(2)
,
C. Deil
,
P. Dewilt
,
H. J. Dickinson
,
A. Djannati-Ataï
(3)
,
W. Domainko
,
L. O'C. Drury
,
F. Dubois
,
G. Dubus
,
K. Dutson
,
J. Dyks
,
M. Dyrda
,
K. Egberts
,
P. Eger
,
P. Espigat
(3)
,
L. Fallon
,
C. Farnier
(1)
,
S. Fegan
(2)
,
F. Feinstein
(1)
,
M. V. Fernandes
,
D. Fernandez
,
A. Fiasson
(6)
,
G. Fontaine
(2)
,
A. Förster
,
M. Füss Ling
,
M. Gajdus
,
Y. A. Gallant
(1)
,
T. Garrigoux
,
H. Gast
,
B. Giebels
(2)
,
J. F. Glicenstein
,
B. Glück
,
D. Göring
,
M. -H. Grondin
,
S. Häffner
,
J. D. Hague
,
J. Hahn
,
D. Hampf
,
J. Harris
,
S. Heinz
,
G. Heinzelmann
,
G. Henri
,
G. Hermann
,
A. Hillert
,
J. A. Hinton
,
W. Hofmann
,
P. Hofverberg
,
M. Holler
,
D. Horns
,
A. Jacholkowska
(5)
,
C. Jahn
,
M. Jamrozy
,
I. Jung
,
M. A. Kastendieck
,
K. Katarzyń Ski
,
U. Katz
,
S. Kaufmann
,
B. Khélifi
(2)
,
D. Klochkov
,
W. Kluź Niak
,
T. Kneiske
,
Nu. Komin
(6)
,
K. Kosack
,
R. Kossakowski
(6)
,
F. Krayzel
(6)
,
P. P. Krüger
,
H. Laffon
(2)
,
G. Lamanna
(6)
,
J. -P. Lenain
,
D. Lennarz
,
T. Lohse
,
A. Lopatin
,
C. -C. Lu
,
V. Marandon
,
Alexandre Marcowith
(1)
,
Julien Masbou
(6)
,
G. Maurin
(6)
,
N. Maxted
,
M. Mayer
,
T. J. L. Mccom
,
M. C. Medina
,
J. Méhault
(1)
,
U. Menzler
,
R. Moderski
,
M. Mohamed
,
Emmanuel Moulin
,
C. L. Naumann
(5)
,
M. Naumann-Godo
,
M. Denaurois
(5)
,
D. Nedbal
,
N. Nguyen
,
J. Niemiec
,
S. J. Nolan
,
S. Ohm
,
E. Deoñ Awilhelmi
,
B. Opitz
,
M. Ostrowski
,
I. Oya
,
M. Panter
,
D. Parsons
,
M. Pazarribas
,
N. W. Pekeur
,
G. Pelletier
,
J. Perez
,
P. -O. Petrucci
,
B. Peyaud
,
S. Pita
(3)
,
G. Pühlhofer
,
M. Punch
(3)
,
A. Quirrenbach
,
M. Raue
,
A. Reimer
,
O. Reimer
,
Matthieu Renaud
(1)
,
R. Delosreyes
,
F. Rieger
,
J. Ripken
,
L. Rob
,
S. Rosier-Lees
(6)
,
G. Rowell
,
B. Rudak
,
C. B. Rulten
,
V. Sahakian
,
D. A. Sanchez
,
A. Santangelo
,
R. Schlickeiser
,
A. Schulz
,
U. Schwanke
,
S. Schwarzburg
,
S. Schwemmer
,
F. Sheidaei
(3)
,
J. L. Skilton
,
H. Sol
(4)
,
G. Spengler
,
L. Stawarz
,
R. Steenkamp
,
C. Stegmann
,
F. Stinzing
,
K. Stycz
,
I. Sushch
,
A. Szostek
,
J. -P. Tavernet
(5)
,
R. Terrier
(3)
,
M. Tluczykont
,
C. Trichard
,
K. Valerius
,
C. Vaneldik
,
George Vasileiadis
(1)
,
C. Venter
,
A. Viana
,
P. Vincent
(5)
,
H. J. Völk
,
F. Volpe
,
S. Vorobiov
(1)
,
M. Vorster
,
S. J. Wagner
,
M. Ward
,
R. White
,
A. Wierzcholska
,
D. Wouters
,
M. Zacharias
,
A. Zajczyk
,
A. A. Zdziarski
,
A. Zech
(4)
,
H. -S. Zechlin
1
LUPM -
Laboratoire Univers et Particules de Montpellier
2 LLR - Laboratoire Leprince-Ringuet
3 APC (UMR_7164) - AstroParticule et Cosmologie
4 LUTH (UMR_8102) - Laboratoire Univers et Théories
5 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
6 LAPP - Laboratoire d'Annecy de Physique des Particules
2 LLR - Laboratoire Leprince-Ringuet
3 APC (UMR_7164) - AstroParticule et Cosmologie
4 LUTH (UMR_8102) - Laboratoire Univers et Théories
5 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
6 LAPP - Laboratoire d'Annecy de Physique des Particules
A. Abramowski
- Function : Author
Fabio Acero
- Function : Author
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F. Aharonian
- Function : Author
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A. G. Akhperjanian
- Function : Author
G. Anton
- Function : Author
S. Balenderan
- Function : Author
Agnès Balzer
- Function : Author
A. Barnacka
- Function : Author
Y. Becherini
- Function : Author
- PersonId : 932592
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J. Becker Tjus
- Function : Author
K. Bernlöhr
- Function : Author
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E. Birsin
- Function : Author
A. Bochow
- Function : Author
C. Boisson
- Function : Author
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P. Bordas
- Function : Author
J. Brucker
- Function : Author
F. Brun
- Function : Author
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P. Brun
- Function : Author
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T. Bulik
- Function : Author
S. Carrigan
- Function : Author
S. Casanova
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M. Cerruti
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P. M. Chadwick
- Function : Author
R. C. G. Chaves
- Function : Author
A. Cheesebrough
- Function : Author
G. Cologna
- Function : Author
J. Conrad
- Function : Author
C. Couturier
- Function : Author
M. Dalton
- Function : Author
M. K. Daniel
- Function : Author
I. D. Davids
- Function : Author
C. Deil
- Function : Author
P. Dewilt
- Function : Author
H. J. Dickinson
- Function : Author
W. Domainko
- Function : Author
L. O'C. Drury
- Function : Author
G. Dubus
- Function : Author
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K. Dutson
- Function : Author
J. Dyks
- Function : Author
M. Dyrda
- Function : Author
K. Egberts
- Function : Author
P. Eger
- Function : Author
L. Fallon
- Function : Author
S. Fegan
- Function : Author
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M. V. Fernandes
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D. Fernandez
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A. Fiasson
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A. Förster
- Function : Author
M. Füss Ling
- Function : Author
M. Gajdus
- Function : Author
T. Garrigoux
- Function : Author
H. Gast
- Function : Author
J. F. Glicenstein
- Function : Author
B. Glück
- Function : Author
D. Göring
- Function : Author
M. -H. Grondin
- Function : Author
S. Häffner
- Function : Author
J. D. Hague
- Function : Author
J. Hahn
- Function : Author
D. Hampf
- Function : Author
J. Harris
- Function : Author
S. Heinz
- Function : Author
G. Heinzelmann
- Function : Author
G. Henri
- Function : Author
G. Hermann
- Function : Author
A. Hillert
- Function : Author
J. A. Hinton
- Function : Author
W. Hofmann
- Function : Author
P. Hofverberg
- Function : Author
M. Holler
- Function : Author
D. Horns
- Function : Author
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C. Jahn
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M. Jamrozy
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I. Jung
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M. A. Kastendieck
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K. Katarzyń Ski
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U. Katz
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S. Kaufmann
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B. Khélifi
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D. Klochkov
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W. Kluź Niak
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T. Kneiske
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K. Kosack
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R. Kossakowski
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P. P. Krüger
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J. -P. Lenain
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D. Lennarz
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A. Lopatin
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C. -C. Lu
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V. Marandon
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Alexandre Marcowith
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Julien Masbou
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N. Maxted
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M. Mayer
- Function : Author
T. J. L. Mccom
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M. C. Medina
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U. Menzler
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R. Moderski
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M. Mohamed
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Emmanuel Moulin
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M. Naumann-Godo
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N. Nguyen
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S. J. Nolan
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S. Ohm
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E. Deoñ Awilhelmi
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I. Oya
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M. Panter
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N. W. Pekeur
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G. Pelletier
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J. Perez
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P. -O. Petrucci
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B. Peyaud
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G. Pühlhofer
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M. Punch
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A. Quirrenbach
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M. Raue
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A. Reimer
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O. Reimer
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Matthieu Renaud
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R. Delosreyes
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J. Ripken
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L. Rob
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B. Rudak
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C. B. Rulten
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V. Sahakian
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D. A. Sanchez
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A. Santangelo
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R. Schlickeiser
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S. Schwarzburg
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S. Schwemmer
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J. L. Skilton
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G. Spengler
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L. Stawarz
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R. Steenkamp
- Function : Author
C. Stegmann
- Function : Author
F. Stinzing
- Function : Author
K. Stycz
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I. Sushch
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A. Szostek
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M. Tluczykont
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C. Trichard
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K. Valerius
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C. Vaneldik
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George Vasileiadis
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C. Venter
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A. Viana
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H. J. Völk
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F. Volpe
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M. Vorster
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S. J. Wagner
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M. Ward
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R. White
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A. Wierzcholska
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D. Wouters
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M. Zacharias
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A. Zajczyk
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A. A. Zdziarski
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A. Zech
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H. -S. Zechlin
- Function : Author
Abstract
Vela X is a region of extended radio emission in the western part of the Vela constellation: one of the nearest pulsar wind nebulae (PWNe), and associated with the energetic Vela pulsar (PSR B0833-45). Extended very-high-energy (VHE) $\gamma$-ray emission (HESS $\mathrm{J0835\mhyphen 455}$) was discovered using the H.E.S.S. experiment in 2004. The VHE $\gamma$-ray emission was found to be coincident with a region of X-ray emission discovered with ${\it ROSAT}$ above 1.5 keV (the so-called \textit{Vela X cocoon}): a filamentary structure extending southwest from the pulsar to the centre of Vela X. A deeper observation of the entire Vela X nebula region, also including larger offsets from the cocoon, has been performed with H.E.S.S. This re-observation was carried out in order to probe the extent of the non-thermal emission from the Vela X region at TeV energies and to investigate its spectral properties. In order to increase the sensitivity to the faint $\gamma$-ray emission from the very extended Vela X region, a multivariate analysis method combining three complementary reconstruction techniques of Cherenkov-shower images is applied for the selection of $\gamma$-ray events. The analysis is performed with the On/Off background method, which estimates the background from separate observations pointing away from Vela X; towards regions free of $\gamma$-ray sources but with comparable observation conditions. The $\gamma$-ray surface brightness over the large Vela X region reveals that the detection of non-thermal VHE $\gamma$-ray emission from the PWN HESS $\mathrm{J0835\mhyphen 455}$ is statistically significant over a region of radius 1.2$^{\circ}$ around the position $\alpha$ = 08$^{\mathrm{h}}$ 35$^{\mathrm{m}}$ 00$^{\mathrm{s}}$, $\delta$ = -45$^{\circ}$ 36$^{\mathrm{\prime}}$ 00$^{\mathrm{\prime}\mathrm{\prime}}$ (J2000).