2014ApJ...790..149A

Query : 2014ApJ...790..149A

2014ApJ...790..149A - Astrophys. J., 790, 149 (2014/August-1)

Very-high energy observations of the Galactic Center region by VERITAS in 2010-2012.

ARCHER A., BARNACKA A., BEILICKE M., BENBOW W., BERGER K., BIRD R., BITEAU J., BUCKLEY J.H., BUGAEV V., BYRUM K., CARDENZANA J.V., CERRUTI M., CHEN W., CHEN X., CIUPIK L., CONNOLLY M.P., CUI W., DICKINSON H.J., DUMM J., EISCH J.D., FALCONE A., FEDERICI S., FENG Q., FINLEY J.P., FLEISCHHACK H., FORTSON L., FURNISS A., GALANTE N., GRIFFIN S., GRIFFITHS S.T., GRUBE J., GYUK G., HAKANSSON N., HANNA D., HOLDER J., HUGHES G., JOHNSON C.A., KAARET P., KAR P., KERTZMAN M., KHASSEN Y., KIEDA D., KRAWCZYNSKI H., KUMAR S., LANG M.J., MAIER G., McARTHUR S., McCANN A., MEAGHER K., MORIARTY P., MUKHERJEE R., NIETO D., O'FAOLAIN DE BHROITHE A., ONG R.A., OTTE A.N., PARK N., PERKINS J.S., POHL M., POPKOW A., PROKOPH H., PUESCHEL E., QUINN J., RAGAN K., RAJOTTE J., REYES L.C., REYNOLDS P.T., RICHARDS G.T., ROACHE E., SEMBROSKI G.H., SHAHINYAN K., SMITH A.W., STASZAK D., TELEZHINSKY I., TUCCI J.V., TYLER J., VARLOTTA A., VINCENT S., WAKELY S.P., WEINSTEIN A., WELSING R., WILHELM A., WILLIAMS D.A., ZAJCZYK A. and ZITZER B.

Abstract (from CDS):

The Galactic center is an interesting region for high-energy (0.1-100 GeV) and very-high-energy (E > 100 GeV) γ-ray observations. Potential sources of GeV/TeV γ-ray emission have been suggested, e.g., the accretion of matter onto the supermassive black hole, cosmic rays from a nearby supernova remnant (e.g., Sgr A East), particle acceleration in a plerion, or the annihilation of dark matter particles. The Galactic center has been detected by EGRET and by Fermi/LAT in the MeV/GeV energy band. At TeV energies, the Galactic center was detected with moderate significance by the CANGAROO and Whipple 10 m telescopes and with high significance by H.E.S.S., MAGIC, and VERITAS. We present the results from three years of VERITAS observations conducted at large zenith angles resulting in a detection of the Galactic center on the level of 18 standard deviations at energies above ∼2.5 TeV. The energy spectrum is derived and is found to be compatible with hadronic, leptonic, and hybrid emission models discussed in the literature. Future, more detailed measurements of the high-energy cutoff and better constraints on the high-energy flux variability will help to refine and/or disentangle the individual models.

Abstract Copyright: ∼

Journal keyword(s): astroparticle physics - black hole physics - Galaxy: center - gamma rays: galaxies - methods: data analysis - radiation mechanisms: non-thermal

Simbad objects: 11

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Number of rows : 11
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 HESS J1741-302 gam 17 41 15.79827 -30 22 37.2040           ~ 31 0
3 3FHL J1746.2-2852 LXB 17 44 33.09 -28 44 27.0           ~ 559 0
4 2CG 359+00 gam 17 45 11 -30 11.9           ~ 104 0
5 AX J1745.6-2901 LXB 17 45 35.6400 -29 01 33.888           ~ 191 1
6 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
7 CXOGC J174539.7-290022 Psr 17 45 39.80 -29 00 19.9           ~ 54 1
8 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4970 3
9 NAME G2 Dust Cloud IR 17 45 40.04 -29 00 28.1           ~ 209 0
10 NAME Sgr A East SNR 17 45 41 -29 00.8           ~ 523 2
11 SNR G000.9+00.1 SNR 17 47.3 -28 09           ~ 222 1

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