2015ApJ...815L..22A

Query : 2015ApJ...815L..22A

2015ApJ...815L..22A - Astrophys. J., 815, L22 (2015/December-3)

Gamma-rays from the quasar PKS 1441+25: story of an escape.

ABEYSEKARA A.U., ARCHAMBAULT S., ARCHER A., AUNE T., BARNACKA A., BENBOW W., BIRD R., BITEAU J., BUCKLEY J.H., BUGAEV V., CARDENZANA J.V., CERRUTI M., CHEN X., CHRISTIANSEN J.L., CIUPIK L., CONNOLLY M.P., COPPI P., CUI W., DICKINSON H.J., DUMM J., EISCH J.D., ERRANDO M., FALCONE A., FENG Q., FINLEY J.P., FLEISCHHACK H., FLINDERS A., FORTIN P., FORTSON L., FURNISS A., GILLANDERS G.H., GRIFFIN S., GRUBE J., GYUK G., HUTTEN M., HAKANSSON N., HANNA D., HOLDER J., HUMENSKY T.B., JOHNSON C.A., KAARET P., KAR P., KELLEY-HOSKINS N., KHASSEN Y., KIEDA D., KRAUSE M., KRENNRICH F., 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., PETRASHYK A., POHL M., POPKOW A., PUESCHEL E., QUINN J., RAGAN K., RATLIFF G., REYNOLDS P.T., RICHARDS G.T., ROACHE E., ROUSSELLE J., SANTANDER M., SEMBROSKI G.H., SHAHINYAN K., SMITH A.W., STASZAK D., TELEZHINSKY I., TODD N.W., TUCCI J.V., TYLER J., VASSILIEV V.V., VINCENT S., WAKELY S.P., WEINER O.M., WEINSTEIN A., WILHELM A., WILLIAMS D.A., ZITZER B., SMITH P.S., HOLOIEN T.W.-S., PRIETO J.L., KOCHANEK C.S., STANEK K.Z., SHAPPEE B., HOVATTA T., MAX-MOERBECK W., PEARSON T.J., REEVES R.A., RICHARDS J.L., READHEAD A.C.S., MADEJSKI G.M., DJORGOVSKI S.G., DRAKE A.J., GRAHAM M.J. and MAHABAL A.

Abstract (from CDS):

Outbursts from gamma-ray quasars provide insights on the relativistic jets of active galactic nuclei and constraints on the diffuse radiation fields that fill the universe. The detection of significant emission above 100 GeV from a distant quasar would show that some of the radiated gamma-rays escape pair-production interactions with low-energy photons, be it the extragalactic background light (EBL), or the radiation near the supermassive black hole lying at the jet's base. VERITAS detected gamma-ray emission up to ∼200 GeV from PKS 1441+25 (z = 0.939) during 2015 April, a period of high activity across all wavelengths. This observation of PKS 1441+25 suggests that the emission region is located thousands of Schwarzschild radii away from the black hole. The gamma-ray detection also sets a stringent upper limit on the near-ultraviolet to near-infrared EBL intensity, suggesting that galaxy surveys have resolved most, if not all, of the sources of the EBL at these wavelengths.

Abstract Copyright: ∼

Journal keyword(s): cosmology: observations - diffuse radiation - gamma rays: galaxies - quasars: individual: PKS 1441+25,VER J1443+250 - radiation mechanisms: non-thermal

Simbad objects: 5

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Number of rows : 5
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 6C 021803+354230 BLL 02 21 05.4920852208 +35 56 13.848581904   20.0 20.0 19.60   ~ 603 3
2 7C 122223.5+213929 Bla 12 24 54.4583146056 +21 22 46.385507388   17.56 17.50 18.2   ~ 770 2
3 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
4 7C 1441+2514 Bla 14 43 56.89220390 +25 01 44.4907165   19.5   19.7   ~ 179 1
5 QSO J1512-0906 Bla 15 12 50.53293048 -09 05 59.8297908   16.74 16.54     ~ 1409 1

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