2011A&A...528A.143A

Query : 2011A&A...528A.143A

2011A&A...528A.143A - Astronomy and Astrophysics, volume 528A143-143 (2011/4-1)

Detection of very-high-energy γ-ray emission from the vicinity of PSR B1706-44 and G343.1-2.3 with H.E.S.S.

ABRAMOWSKI A., ACERO F., AHARONIAN F., AKHPERJANIAN A.G., ANTON G., BARNACKA A., BARRES DE ALMEIDA U., BAZER-BACHI A.R., BECHERINI Y., BECKER J., BEHERA B., BERNLOEHR K., BOCHOW A., BOISSON C., BOLMONT J., BORDAS P., BORREL V., BRUCKER J., BRUN F., BRUN P., BULIK T., BUESCHING I., CARRIGAN S., CASANOVA S., CERRUTI M., CHADWICK P.M., CHARBONNIER A., CHAVES R.C.G., CHEESEBROUGH A., CONRAD J., CHOUNET L.-M., CLAPSON A.C., COIGNET G., DALTON M., DANIEL M.K., DAVIDS I.D., DEGRANGE B., DEIL C., DICKINSON H.J., DJANNATI-ATAIE A., DOMAINKO W., DRURY L.O'C., DUBOIS F., DUBUS G., DYKS J., DYRDA M., EGBERTS K., EGER P., ESPIGAT P., FALLON L., FARNIER C., FEGAN S., FEINSTEIN F., FERNANDES M.V., FIASSON A., FOERSTER A., FONTAINE G., FUESSLING M., GABICI S., GALLANT Y.A., GAST H., GERARD L., GERBIG D., GIEBELS B., GLICENSTEIN J.F., GLUECK B., GORET P., GOERING D., HAGUE J.D., HAMPF D., HAUSER M., HEINZ S., HEINZELMANN G., HENRI G., HERMANN G., HINTON J.A., HOFFMANN A., HOFMANN W., HOFVERBERG P., HOLLERAN M., HOPPE S., HORNS D., JACHOLKOWSKA A., DE JAGER O.C., JAHN C., JAMROZY M., JUNG I., KASTENDIECK M.A., KATARZYNSKI K., KATZ U., KAUFMANN S., KERSCHHAGGL M., KHANGULYAN D., KHELIFI B., KEOGH D., KLUZNIAK W., KNEISKE T., KOMIN N., KOSACK K., KOSSAKOWSKI R., LAFFONT H., LAMANNA G., LEMOINE-GOUMARD M., LENAIN J.-P., LENNARZ D., LOHSE T., LOPATIN A., LU C.-C., MARANDON V., MARCOWITH A., MASBOU J., MAURIN D., MAXTED N., McCOMB T.J.L., MEDINA M.C., MEHAULT J., MODERSKI R., MOULIN E., NAUMANN-GODO M., DE NAUROIS M., NEDBAL D., NEKRASSOV D., NGUYEN N., NICHOLAS B., NIEMIEC J., NOLAN S.J., OHM S., OLIVE J.-F., DE ONA WILHELMI E., OPITZ B., OSTROWSKI M., PANTER M., PAZ ARRIBAS M., PEDALETTI G., PELLETIER G., PETRUCCI P.-O., PITA S., PUEHLHOFER G., PUNCH M., QUIRRENBACH A., RAUE M., RAYNER S.M., REIMER A., REIMER O., RENAUD M., DE LOS REYES R., RIEGER F., RIPKEN J., ROB L., ROSIER-LEES S., ROWELL G., RUDAK B., RULTEN C.B., RUPPEL J., RYDE F., SAHAKIAN V., SANTANGELO A., SCHLICKEISER R., SCHOECK F.M., SCHOENWALD A., SCHWANKE U., SCHWARZBURG S., SCHWEMMER S., SHALCHI A., SUSHCH I., SIKORA M., SKILTON J.L., SOL H., SPENGLER G., STAWARZ L., STEENKAMP R., STEGMANN C., STINZING F., SZOSTEK A., TAM P.H., TAVERNET J.-P., TERRIER R., TIBOLLA O., TLUCZYKONT M., VALERIUS K., VAN ELDIK C., VASILEIADIS G., VENTER C., VIALLE J.P., VIANA A., VINCENT P., VIVIER M., VOELK H.J., VOLPE F., VOROBIOV S., WAGNER S.J., WARD M., WIERZCHOLSKA A., ZAJCZYK A., ZDZIARSKI A.A., ZECH A., ZECHLIN H.-S. (The HESS Collaboration), DUBNER G. and GIACANI E.

Abstract (from CDS):

The γ-ray pulsar PSRB1706-44 and the adjacent supernova remnant (SNR) candidate G343.1-2.3 were observed by H.E.S.S. during a dedicated observation campaign in 2007. As a result of this observation campaign, a new source of very-high-energy (VHE; E>100GeV) γ-ray emission, H.E.S.S.J1708-443, was detected with a statistical significance of 7σ, although no significant point-like emission was detected at the position of the energetic pulsar itself. In this paper, the morphological and spectral analyses of the newly-discovered TeV source are presented. The centroid of H.E.S.S.J1708-443 is considerably offset from the pulsar and located near the apparent center of the SNR, at αJ2000=17h08m11s ±17s and δJ2000=-44°20'±4'. The source is found to be significantly more extended than the H.E.S.S. point spread function (∼0.1°), with an intrinsic Gaussian width of 0.29°±0.04°. Its integral flux between 1 and 10 TeV is ∼3.8x10–12 ph/cm2/s, equivalent to 17% of the Crab Nebula flux in the same energy range. The measured energy spectrum is well-fit by a power law with a relatively hard photon index Γ=2.0±0.1stat±0.2sys. Additional multi-wavelength data, including 330MHz VLA observations, were used to investigate the VHE γ-ray source's possible associations with the pulsar wind nebula of PSRB1706-44 and/or with the complex radio structure of the partial shell-type SNR G343.1-2.3.

Abstract Copyright: ∼

Journal keyword(s): ISM: individual objects: G343.1-2.3 - gamma rays: general - pulsars: individual: PSRB1706-44

Simbad objects: 18

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Number of rows : 18
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
2 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5476 0
3 NAME Vela X Psr 08 33 08.880 -45 11 24.36           ~ 302 1
4 NAME Vela Pulsar Psr 08 35 20.65525 -45 10 35.1545     15.10     ~ 2446 1
5 NAME Vela Jr SN SNR 08 52.0 -46 20           ~ 507 2
6 Sand 1 * 12 02 10.4105305080 +30 02 00.116234376     15.8     M3: 9 2
7 HESS J1702-420 gam 17 02 44.0 -42 00 57           ~ 46 0
8 HESS J1708-443 gam 17 07 59.53847 -44 17 19.0460           ~ 17 0
9 SNR G343.1-02.3 SNR 17 08.0 -44 16           ~ 82 1
10 PMN J1708-4419 Rad 17 08 28.75 -44 18 23.0           ~ 3 1
11 2CG 342-02 gam 17 08 30.1 -44 35 03           ~ 33 0
12 1RXS J170855.6-440653 LXB 17 08 54.346 -44 06 08.38           ~ 406 1
13 PSR B1706-44 Psr 17 09 42.62000 -44 29 12.0000     13.30     ~ 670 1
14 SNR G347.3-00.5 SNR 17 12 27 -39 41.2     12.27     ~ 761 1
15 HESS J1718-385 gam 17 18 07 -38 33.0           ~ 32 0
16 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4970 3
17 HESS J1809-193 gam 18 10 31 -19 18.0           ~ 70 1
18 PSR B1823-13 Psr 18 26 13.06 -13 34 48.1           ~ 460 1

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