2013A&A...559A.136H

Query : 2013A&A...559A.136H

2013A&A...559A.136H - Astronomy and Astrophysics, volume 559A, 136-136 (2013/11-1)

Discovery of very high energy γ-ray emission from the BL Lacertae object PKS 0301-243 with H.E.S.S..

HESS COLLABORATION, ABRAMOWSKI A., ACERO F., AHARONIAN F., AIT BENKHALI F., AKHPERJANIAN A.G., ANGUENER E., ANTON G., BALENDERAN S., BALZER A., BARNACKA A., BECHERINI Y., BECKER TJUS J., BERNLOEHR K., BIRSIN E., BISSALDI E., BITEAU J., BOETTCHER M., BOISSON C., BOLMONT J., BORDAS P., BRUCKER J., BRUN F., BRUN P., BULIK T., CARRIGAN S., CASANOVA S., CERRUTI M., CHADWICK P.M., CHALME-CALVET R., CHAVES R.C.G., CHEESEBROUGH A., CHRETIEN M., COLAFRANCESCO S., COLOGNA G., CONRAD J., COUTURIER C., DALTON M., DANIEL M.K., DAVIDS I.D., DEGRANGE B., DEIL C., DEWILT P., DICKINSON H.J., DJANNATI-ATAIE A., DOMAINKO W., DRURY L.O'C., DUBUS G., DUTSON K., DYKS J., DYRDA M., EDWARDS T., EGBERTS K., EGER P., ESPIGAT P., FARNIER C., FEGAN S., FEINSTEIN F., FERNANDES M.V., FERNANDEZ D., FIASSON A., FONTAINE G., FOERSTER A., FUESLING M., GAJDUS M., GALLANT Y.A., GARRIGOUX T., GIEBELS B., GLICENSTEIN J.F., GRONDIN M.-H., GRUDZINSKA M., HAEFFNER S., HAGUE J.D., HAHN J., HARRIS J., HEINZELMANN G., HENRI G., HERMANN G., HERVET O., HILLERT A., HINTON J.A., HOFMANN W., HOFVERBERG P., HOLLER M., HORNS D., JACHOLKOWSKA A., JAHN C., JAMROZY M., JANIAK M., JANKOWSKY F., JUNG I., KASTENDIECK M.A., KATARZYNSKI K., KATZ U., KAUFMANN S., KHELIFI B., KIEFFER M., KLEPSER S., KLOCHKOV D., KLUZNIAK W., KNEISKE T., KOLITZUS D., KOMIN NU., KOSACK K., KRAKAU S., KRAYZEL F., KRUEGER P.P., LAFFON H., LAMANNA G., LEFAUCHEUR J., LEMOINE-GOUMARD M., LENAIN J.-P., LENNARZ D., LOHSE T., LOPATIN A., LU C.-C., MARANDON V., MARCOWITH A., MARX R., MAURIN G., MAXTED N., MAYER M., McCOMB T.J.L., MEDINA M.C., MEHAULT J., MENZLER U., MEYER M., MODERSKI R., MOHAMED M., MOULIN E., MURACH T., NAUMANN C.L., DE NAUROIS M., NEDBAL D., NIEMIEC J., NOLAN S.J., OAKES L., OHM S., DE ONA WILHELMI E., OPITZ B., OSTROWSKI M., OYA I., PANTER M., PARSONS R.D., PAZ ARRIBAS M., PEKEUR N.W., PELLETIER G., PEREZ J., PETRUCCI P.-O., PEYAUD B., PITA S., POON H., PUEHLHOFER G., PUNCH M., QUIRRENBACH A., RAAB S., RAUE M., REIMER A., REIMER O., RENAUD M., DE LOS REYES R., RIEGER F., ROB L., ROSIER-LEES S., ROWELL G., RUDAK B., RULTEN C.B., SAHAKIAN V., SANCHEZ D.A., SANTANGELO A., SCHLICKEISER R., SCHUESSLER F., SCHULZ A., SCHWANKE U., SCHWARZBURG S., SCHWEMMER S., SOL H., SPENGLER G., SPIES F., STAWARZ L., STEENKAMP R., STEGMANN C., STINZING F., STYCZ K., SUSHCH I., SZOSTEK A., TAVERNET J.-P., TERRIER R., TLUCZYKONT M., TRICHARD C., VALERIUS K., VAN ELDIK C., VASILEIADIS G., VENTER C., VIANA A., VINCENT P., VOELK H.J., VOLPE F., VORSTER M., WAGNER S.J., WAGNER P., WARD M., WEIDINGER M., WEITZEL Q., WHITE R., WIERZCHOLSKA A., WILLMANN P., WOERNLEIN A., WOUTERS D., ZACHARIAS M., ZAJCZYK A., ZDZIARSKI A.A., ZECH A. and ZECHLIN H.-S.

Abstract (from CDS):

The active galactic nucleus PKS0301-243 (z=0.266) is a high-synchrotron-peaked BLLac object that is detected at high energies (HE, 100MeV<E<100GeV) by Fermi/LAT. This paper reports on the discovery of PKS0301-243 at very high energies (E>100GeV) by the High Energy Stereoscopic System (H.E.S.S.) from observations between September 2009 and December 2011 for a total live time of 34.9h. Gamma rays above 200GeV are detected at a significance of 9.4σ. A hint of variability at the 2.5σ level is found. An integral flux I(E>200GeV=(3.3±1.1_stat±0.7_syst)x10^–12ph/cm²/s and a photon index Γ=4.6±0.7_stat±0.2_syst are measured. Multi-wavelength light curves in HE, X-ray and optical bands show strong variability, and a minimal variability timescale of eight days is estimated from the optical light curve. A single-zone leptonic synchrotron self-Compton scenario satisfactorily reproduces the multi-wavelength data. In this model, the emitting region is out of equipartition and the jet is particle dominated. Because of its high redshift compared to other sources observed at TeV energies, the very high energy emission from PKS0301-243 is attenuated by the extragalactic background light (EBL) and the measured spectrum is used to derive an upper limit on the opacity of the EBL.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - BL Lacertae objects: general - BL Lacertae objects: individual: PKS 0301-243 - gamma rays: galaxies - radiation mechanisms: non-thermal

Simbad objects: 7

Full paper

View the references in ADS

Number of rows : 7

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag B	Mag V	Mag R	Sp type	#ref 1850 - 2023	#notes
1	QSO B0301-243	BLL	03 03 26.5025589984	-24 07 11.426291220	16.55	16.18		~	201	1
2	USNO-A2.0 0600-01199510	G	03 03 27.7	-24 07 01				~	3	0
3	M 1	SNR	05 34 30.9	+22 00 53				~	6031	1
4	Mrk 421	BLL	11 04 27.3140835504	+38 12 31.798495872	13.50	12.90	8.31	~	2575	1
5	3C 279	Bla	12 56 11.16657958	-05 47 21.5251510	18.01	17.75	15.87	~	2934	2
6	QSO B1959+650	BLL	19 59 59.8520303688	+65 08 54.652536492		12.8	11.21	~	575	2
7	QSO B2155-304	BLL	21 58 52.0652249880	-30 13 32.118447792	13.36	13.09	12.62	~	1677	1

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