2006A&A...456..245A

Query : 2006A&A...456..245A

2006A&A...456..245A - Astronomy and Astrophysics, volume 456, 245-251 (2006/9-2)

Discovery of the two ``wings'' of the Kookaburra complex in VHE γ-rays with HESS.

AHARONIAN F., AKHPERJANIAN A.G., BAZER-BACHI A.R., BEILICKE M., BENBOW W., BERGE D., BERNLOEHR K., BOISSON C., BOLZ O., BORREL V., BRAUN I., BROWN A.M., BUEHLER R., BUESCHING I., CARRIGAN S., CHADWICK P.M., CHOUNET L.-M., CORNILS R., COSTAMANTE L., DEGRANGE B., DICKINSON H.J., DJANNATI-ATAIE A., DRURY L.O'C., DUBUS G., EGBERTS K., EMMANOULOPOULOS D., ESPIGAT P., FEINSTEIN F., FERRERO E., FIASSON A., FONTAINE G., FUNK S., FUESSLING M., GALLANT Y.A., GIEBELS B., GLICENSTEIN J.F., GORET P., HADJICHRISTIDIS C., HAUSER D., HAUSER M., HEINZELMANN G., HENRI G., HERMANN G., HINTON J.A., HOFFMANN A., HOFMANN W., HOLLERAN M., HORNS D., JACHOLKOWSKA A., DE JAGER O.C., KENDZIORRA E., KHELIFI B., KOMIN N., KONOPELKO A., KOSACK K., LATHAM I.J., LE GALLOU R., LEMIERE A., LEMOINE-GOUMARD M., LOHSE T., MARTIN J.M., MARTINEAU-HUYNH O., MARCOWITH A., MASTERSON C., MAURIN G., McCOMB T.J.L., DE NAUROIS M., NEDBAL D., NOLAN S.J., NOUTSOS A., ORFORD K.J., OSBORNE J.L., OUCHRIF M., PANTER M., PELLETIER G., PITA S., PUEHLHOFER G., PUNCH M., RAUBENHEIMER B.C., RAUE M., RAYNER S.M., REIMER A., REIMER O., RIPKEN J., ROB L., ROLLAND L., ROWELL G., SAHAKIAN V., SANTANGELO A., SAUGE L., SCHLENKER S., SCHLICKEISER R., SCHROEDER R., SCHWANKE U., SCHWARZBURG S., SHALCHI A., SOL H., SPANGLER D., SPANIER F., STEENKAMP R., STEGMANN C., SUPERINA G., TAVERNET J.-P., TERRIER R., THEORET C.G., TLUCZYKONT M., VAN ELDIK C., VASILEIADIS G., VENTER C., VINCENT P., VOELK H.J., WAGNER S.J. and WARD M.

Abstract (from CDS):

Search for Very High Energy γ-ray emission in the Kookaburra complex through observations with the HESS array. Stereoscopic imaging of Cherenkov light emission of the γ-ray showers in the atmosphere is used for the reconstruction and selection of the events to search for γ-ray signals. Their spectrum is derived by a forward-folding maximum likelihood fit. Two extended γ-ray sources with an angular (68%) radius of 3.3-3.4' are discovered at high (>13σ) statistical significance: HESS J1420-607 and HESS J1418-609. They exhibit a flux above 1TeV of (2.97±0.18stat±0.60sys)x10–12 and (2.17±0.17stat±0.43sys)x10–12cm–2/s, respectively, and similar hard photon indices ∼2.2. Multi-wavelength comparisons show spatial coincidence with the wings of the Kookaburra. Two pulsar wind nebulae candidates, K3/PSR J1420-6048 and the Rabbit, lie on the edge of the HESS sources. The two new sources confirm the non-thermal nature of at least parts of the two radio wings which overlap with the γ-ray emission and establish their connection with the two X-ray pulsar wind nebulae candidates. Given the large point spread function of EGRET, the unidentified source(s) 3EG J1420-6038/GeV J1417-6100 could possibly be related to either or both HESS sources. The most likely explanation for the Very High Energy γ-rays discovered by HESS is inverse Compton emission of accelerated electrons on the Cosmic Microwave Background near the two candidate pulsar wind nebulae, K3/PSR J1420-6048 and the Rabbit. Two scenarios which could lead to the observed large (∼10pc) offset-nebula type morphologies are briefly discussed.

Abstract Copyright: ∼

Journal keyword(s): ISM: general - gamma rays: observations - radiation mechanisms: non-thermal

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 - 2024 		#notes
1 M 1 SNR 05 34 30.9 +22 00 53           ~ 6198 1
2 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5263 0
3 NAME Vela X Psr 08 33 08.880 -45 11 24.36           ~ 282 1
4 PSR J1410-6132 Psr 14 10 24.000 -61 32 00.00           ~ 128 1
5 SNR G312.4-00.4 SNR 14 13 00 -61 44.0           ~ 92 1
6 AX J1418.7-6058 X 14 18 38.6 -60 57 49           ~ 52 0
7 [NRR2005] R2 X 14 18 39.90 -60 57 56.5           ~ 8 0
8 PSR J1418-6058 Psr 14 18 42.725 -60 58 01.89           ~ 120 0
9 [NRR2005] R1 X 14 18 42.83 -60 58 03.1           ~ 8 0
10 NAME Kookaburra reg 14 19 -60.9           ~ 53 1
11 IRAS 14159-6038 HII 14 19 35.5 -60 51 53           ~ 16 0
12 GAL 313.6+00.3 Rad 14 20 -60.7           ~ 9 0
13 AX J1420.1-6049 Rad 14 20 07.8 -60 48 56           ~ 25 0
14 PSR J1420-6048 Psr 14 20 08.190 -60 48 14.85           ~ 196 0
15 NAME Mouse Rad 17 47 15.78 -29 58 01.0           ~ 111 1
16 PSR J1826-1256 Psr 18 26 08.570 -12 56 33.53           ~ 131 1
17 PSR B1823-13 Psr 18 26 13.06 -13 34 48.1           ~ 421 1
18 [RRJ99] K4 Rad ~ ~           ~ 2 0

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