Back to Search Start Over

Probing the extent of the non-thermal emission from the Vela X region at TeV energies with HESS

Authors :
Abramowski, A.
Acero, F.
Aharonian, F.
Akhperjanian, A. G.
Anton, G.
Balenderan, S.
Balzer, A.
Barnacka, A.
Becherini, Y.
Tjus, J. Becker
Bernloehr, K.
Birsin, E.
Biteau, J.
Bochow, A.
Boisson, C.
Bolmont, J.
Bordas, P.
Brucker, J.
Brun, F.
Brun, P.
Bulik, T.
Carrigan, S.
Casanova, S.
Cerruti, M.
Chadwick, P. M.
Charbonnier, A.
Chaves, R. C. G.
Cheesebrough, A.
Cologna, G.
Conrad, Jan
Couturier, C.
Dalton, M.
Daniel, M. K.
Davids, I. D.
Degrange, B.
Deil, C.
deWilt, P.
Dickinson, Hugh J.
Djannati-Atai, A.
Domainko, W.
Drury, L. O 'C.
Dubois, F.
Dubus, G.
Dutson, K.
Dyks, J.
Dyrda, M.
Egberts, K.
Eger, P.
Espigat, P.
Fallon, L.
Farnier, Christian
Fegan, S.
Feinstein, F.
Fernandes, M. V.
Fernandez, D.
Fiasson, A.
Fontaine, G.
Foerster, A.
Fuessling, M.
Gajdus, M.
Gallant, Y. A.
Garrigoux, T.
Gast, H.
Giebels, B.
Glicenstein, J. F.
Glueck, B.
Goering, D.
Grondin, M. -H
Haeffner, S.
Hague, J. D.
Hahn, J.
Hampf, D.
Harris, J.
Heinz, S.
Heinzelmann, G.
Henri, G.
Hermann, G.
Hillert, A.
Hinton, J. A.
Hofmann, W.
Hofverberg, P.
Holler, M.
Horns, D.
Jacholkowska, A.
Jahn, C.
Jamrozy, M.
Jung, I.
Kastendieck, M. A.
Katarzynski, K.
Katz, U.
Kaufmann, S.
Khelifi, B.
Klochkov, D.
Kluzniak, W.
Kneiske, T.
Komin, Nu
Kosack, K.
Kossakowski, R.
Krayzel, F.
Krueger, P. P.
Laffon, H.
Lamanna, G.
Lenain, J. -P
Lennarz, D.
Lohse, T.
Lopatin, A.
Lu, C-C
Marandon, V.
Marcowith, A.
Masbou, J.
Maurin, G.
Maxted, N.
Mayer, M.
McComb, T. J. L.
Medina, M. C.
Mehault, J.
Menzler, U.
Moderski, R.
Mohamed, M.
Moulin, E.
Naumann, C. L.
Naumann-Godo, M.
de Naurois, M.
Nedbal, D.
Nguyen, N.
Niemiec, J.
Nolan, S. J.
Ohm, S.
Wilhelmi, E. de Ona
Opitz, B.
Ostrowski, M.
Oya, I.
Panter, M.
Parsons, D.
Arribas, M. Paz
Pekeur, N. W.
Pelletier, G.
Perez, J.
Petrucci, P. -O
Peyaud, B.
Pita, S.
Puehlhofer, G.
Punch, M.
Quirrenbach, A.
Raue, M.
Reimer, A.
Reimer, O.
Renaud, M.
de los Reyes, R.
Rieger, F.
Ripken, Joachim
Rob, L.
Rosier-Lees, S.
Rowell, G.
Rudak, B.
Rulten, C. B.
Sahakian, V.
Sanchez, D. A.
Santangelo, A.
Schlickeiser, R.
Schulz, A.
Schwanke, U.
Schwarzburg, S.
Schwemmer, S.
Sheidaei, F.
Skilton, J. L.
Sol, H.
Spengler, G.
Stawarz, L.
Steenkamp, R.
Stegmann, C.
Stinzing, F.
Stycz, K.
Sushch, I.
Szostek, A.
Tavernet, J. -P
Terrier, R.
Tluczykont, M.
Trichard, C.
Valerius, K.
van Eldik, C.
Vasileiadis, G.
Venter, C.
Viana, A.
Vincent, P.
Voelk, H. J.
Volpe, F.
Vorobiov, S.
Vorster, M.
Wagner, S. J.
Ward, M.
White, R.
Wierzcholska, A.
Wouters, D.
Zacharias, M.
Zajczyk, A.
Zdziarski, A. A.
Zech, A.
Zechlin, H. -S
Abramowski, A.
Acero, F.
Aharonian, F.
Akhperjanian, A. G.
Anton, G.
Balenderan, S.
Balzer, A.
Barnacka, A.
Becherini, Y.
Tjus, J. Becker
Bernloehr, K.
Birsin, E.
Biteau, J.
Bochow, A.
Boisson, C.
Bolmont, J.
Bordas, P.
Brucker, J.
Brun, F.
Brun, P.
Bulik, T.
Carrigan, S.
Casanova, S.
Cerruti, M.
Chadwick, P. M.
Charbonnier, A.
Chaves, R. C. G.
Cheesebrough, A.
Cologna, G.
Conrad, Jan
Couturier, C.
Dalton, M.
Daniel, M. K.
Davids, I. D.
Degrange, B.
Deil, C.
deWilt, P.
Dickinson, Hugh J.
Djannati-Atai, A.
Domainko, W.
Drury, L. O 'C.
Dubois, F.
Dubus, G.
Dutson, K.
Dyks, J.
Dyrda, M.
Egberts, K.
Eger, P.
Espigat, P.
Fallon, L.
Farnier, Christian
Fegan, S.
Feinstein, F.
Fernandes, M. V.
Fernandez, D.
Fiasson, A.
Fontaine, G.
Foerster, A.
Fuessling, M.
Gajdus, M.
Gallant, Y. A.
Garrigoux, T.
Gast, H.
Giebels, B.
Glicenstein, J. F.
Glueck, B.
Goering, D.
Grondin, M. -H
Haeffner, S.
Hague, J. D.
Hahn, J.
Hampf, D.
Harris, J.
Heinz, S.
Heinzelmann, G.
Henri, G.
Hermann, G.
Hillert, A.
Hinton, J. A.
Hofmann, W.
Hofverberg, P.
Holler, M.
Horns, D.
Jacholkowska, A.
Jahn, C.
Jamrozy, M.
Jung, I.
Kastendieck, M. A.
Katarzynski, K.
Katz, U.
Kaufmann, S.
Khelifi, B.
Klochkov, D.
Kluzniak, W.
Kneiske, T.
Komin, Nu
Kosack, K.
Kossakowski, R.
Krayzel, F.
Krueger, P. P.
Laffon, H.
Lamanna, G.
Lenain, J. -P
Lennarz, D.
Lohse, T.
Lopatin, A.
Lu, C-C
Marandon, V.
Marcowith, A.
Masbou, J.
Maurin, G.
Maxted, N.
Mayer, M.
McComb, T. J. L.
Medina, M. C.
Mehault, J.
Menzler, U.
Moderski, R.
Mohamed, M.
Moulin, E.
Naumann, C. L.
Naumann-Godo, M.
de Naurois, M.
Nedbal, D.
Nguyen, N.
Niemiec, J.
Nolan, S. J.
Ohm, S.
Wilhelmi, E. de Ona
Opitz, B.
Ostrowski, M.
Oya, I.
Panter, M.
Parsons, D.
Arribas, M. Paz
Pekeur, N. W.
Pelletier, G.
Perez, J.
Petrucci, P. -O
Peyaud, B.
Pita, S.
Puehlhofer, G.
Punch, M.
Quirrenbach, A.
Raue, M.
Reimer, A.
Reimer, O.
Renaud, M.
de los Reyes, R.
Rieger, F.
Ripken, Joachim
Rob, L.
Rosier-Lees, S.
Rowell, G.
Rudak, B.
Rulten, C. B.
Sahakian, V.
Sanchez, D. A.
Santangelo, A.
Schlickeiser, R.
Schulz, A.
Schwanke, U.
Schwarzburg, S.
Schwemmer, S.
Sheidaei, F.
Skilton, J. L.
Sol, H.
Spengler, G.
Stawarz, L.
Steenkamp, R.
Stegmann, C.
Stinzing, F.
Stycz, K.
Sushch, I.
Szostek, A.
Tavernet, J. -P
Terrier, R.
Tluczykont, M.
Trichard, C.
Valerius, K.
van Eldik, C.
Vasileiadis, G.
Venter, C.
Viana, A.
Vincent, P.
Voelk, H. J.
Volpe, F.
Vorobiov, S.
Vorster, M.
Wagner, S. J.
Ward, M.
White, R.
Wierzcholska, A.
Wouters, D.
Zacharias, M.
Zajczyk, A.
Zdziarski, A. A.
Zech, A.
Zechlin, H. -S
Publication Year :
2012

Abstract

Context. Vela X is a region of extended radio emission in the western part of the Vela constellation: one of the nearest pulsar wind nebulae, and associated with the energetic Vela pulsar (PSR B0833-45). Extended very-high-energy (VHE) gamma-ray emission (HESS J0835-455) 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 ROSAT above 1.5 keV (the so-called Vela X cocoon): a filamentary structure extending southwest from the pulsar to the centre of Vela X. Aims. 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. Methods. 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. Results. 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 J0835-455 is statistically significant over a region of radius 1.2 degrees around the position alpha = 08(h)35(m)00(s), delta = -45 degrees 36'00 '' (J2000). The Vela X region exhibits almost uniform gamma-ray spectra over its full extent: the differential energy spectrum can be described by a power-law function with a hard spectral index Gamma = 1.32 +/- 0.06(stat) +/- 0.12(sys) and an exponential cutoff at an energy of (14.0 +/- 1.6(stat) +/- 2.6(s<br />AuthorCount:199

Details

Database :
OAIster
Notes :
English
Publication Type :
Electronic Resource
Accession number :
edsoai.on1234745693
Document Type :
Electronic Resource
Full Text :
https://doi.org/10.1051.0004-6361.201219919
Full Text Access
View/download PDF

Tools

Authors Abstract Subjects Details