2011ApJ...730L..20A

Query : 2011ApJ...730L..20A

2011ApJ...730L..20A - Astrophys. J., 730, L20 (2011/April-1)

Discovery of TeV gamma-ray emission from Tycho's supernova remnant.

ACCIARI V.A., ALIU E., ARLEN T., AUNE T., BEILICKE M., BENBOW W., BRADBURY S.M., BUCKLEY J.H., BUGAEV V., BYRUM K., CANNON A., CESARINI A., CIUPIK L., COLLINS-HUGHES E., CUI W., DICKHERBER R., DUKE C., ERRANDO M., FINLEY J.P., FINNEGAN G., FORTSON L., FURNISS A., GALANTE N., GALL D., GILLANDERS G.H., GODAMBE S., GRIFFIN S., GRUBE J., GUENETTE R., GYUK G., HANNA D., HOLDER J., HUGHES J.P., HUI C.M., HUMENSKY T.B., KAARET P., KARLSSON N., KERTZMAN M., KIEDA D., KRAWCZYNSKI H., KRENNRICH F., LANG M.J., LEBOHEC S., MADHAVAN A.S., MAIER G., MAJUMDAR P., McARTHUR S., McCANN A., MORIARTY P., MUKHERJEE R., ONG R.A., ORR M., OTTE A.N., PANDEL D., PARK N.H., PERKINS J.S., POHL M., QUINN J., RAGAN K., REYES L.C., REYNOLDS P.T., ROACHE E., ROSE H.J., SAXON D.B., SCHROEDTER M., SEMBROSKI G.H., DEMET SENTURK G., SLANE P., SMITH A.W., TESIC G., THEILING M., THIBADEAU S., TSURUSAKI K., VARLOTTA A., VASSILIEV V.V., VINCENT S., VIVIER M., WAKELY S.P., WARD J.E., WEEKES T.C., WEINSTEIN A., WEISGARBER T., WILLIAMS D.A., WOOD M. and ZITZER B.

Abstract (from CDS):

We report the discovery of TeV gamma-ray emission from the Type Ia supernova remnant (SNR) G120.1+1.4, known as Tycho's SNR. Observations performed in the period 2008-2010 with the VERITAS ground-based gamma-ray observatory reveal weak emission coming from the direction of the remnant, compatible with a point source located at 00h25m27.s0, + 64°10'50'' (J2000). The TeV photon spectrum measured by VERITAS can be described with a power law dN/dE = C(E/3.42 TeV)–Γ with Γ = 1.95±0.51stat± 0.30sys and C = (1.55±0.43stat± 0.47sys)x10–14/cm2/s/TeV. The integral flux above 1 TeV corresponds to ∼0.9% of the steady Crab Nebula emission above the same energy, making it one of the weakest sources yet detected in TeV gamma rays. We present both leptonic and hadronic models that can describe the data. The lowest magnetic field allowed in these models is ∼80 µG, which may be interpreted as evidence for magnetic field amplification.

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Journal keyword(s): gamma rays: general - ISM: individual (G120.1+01.4 = Tycho = VER J0025+641)

Simbad objects: 3

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Number of rows : 3
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 SN 1572A SN* 00 25 21.5 +64 08 27           B8 1254 1
2 NAME Per Arm PoG 03 30 +45.0           ~ 1672 0
3 NAME Lupus SN SNR 15 02 22.1 -42 05 49           ~ 1407 1

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