2009A&A...498...83A

Query : 2009A&A...498...83A

2009A&A...498...83A - Astronomy and Astrophysics, volume 498, 83-87 (2009/4-4)

MAGIC upper limits to the VHE gamma-ray flux of 3C454.3 in high emission state.

ANDERHUB H., ANTONELLI L.A., ANTORANZ P., BACKES M., BAIXERAS C., BALESTRA S., BARRIO J.A., BARTKO H., BASTIERI D., BECERRA GONZALEZ J., BECKER J.K., BEDNAREK W., BERGER K., BERNARDINI E., BILAND A., BOCK R.K., BONNOLI G., BORDAS P., BORLA TRIDON D., BOSCH-RAMON V., BRETZ T., BRITVITCH I., CAMARA M., CARMONA E., COMMICHAU S., CONTRERAS J.L., CORTINA J., COSTADO M.T., COVINO S., CURTEF V., DAZZI F., DE ANGELIS A., DE CEA DEL POZO E., DE LOS REYES R., DE LOTTO B., DE MARIA M., DE SABATA F., DELGADO MENDEZ C., DOMINGUEZ A., DORNER D., DORO M., ELSAESSER D., ERRANDO M., FERENC D., FERNANDEZ E., FIRPO R., FONSECA M.V., FONT L., GALANTE N., GARCIA LOPEZ R.J., GARCZARCZYK M., GAUG M., GOEBEL F., HADASCH D., HAYASHIDA M., HERRERO A., HOEHNE-MOENCH D., HOSE J., HSU C.C., HUBER S., JOGLER T., KRANICH D., LA BARBERA A., LAILLE A., LEONARDO E., LINDFORS E., LOMBARDI S., LONGO F., LOPEZ M., LORENZ E., MAJUMDAR P., MANEVA G., MANKUZHIYIL N., MANNHEIM K., MARASCHI L., MARIOTTI M., MARTINEZ M., MAZIN D., MEUCCI M., MEYER M., MIRANDA J.M., MIRZOYAN R., MOLDON J., MOLES M., MORALEJO A., NIETO D., NILSSON K., NINKOVIC J., OTTE N., OYA I., PAOLETTI R., PAREDES J.M., PASANEN M., PASCOLI D., PAUSS F., PEGNA R.G., PEREZ-TORRES M.A., PERSIC M., PERUZZO L., PRADA F., PRANDINI E., PUCHADES N., RHODE W., RIBO M., RICO J., RISSI M., ROBERT A., RUEGAMER S., SAGGION A., SAITO T.Y., SALVATI M., SANCHEZ-CONDE M., SARTORI P., SATALECKA K., SCALZOTTO V., SCAPIN V., SCHWEIZER T., SHAYDUK M., SHINOZAKI K., SHORE S.N., SIDRO N., SIERPOWSKA-BARTOSIK A., SILLANPAEAE A., SITAREK J., SOBCZYNSKA D., SPANIER F., STAMERRA A., STARK L.S., TAKALO L., TAVECCHIO F., TEMNIKOV P., TESCARO D., TESHIMA M., TLUCZYKONT M., TORRES D.F., TURINI N., VANKOV H., VENTURINI A., VITALE V., WAGNER R.M., WITTEK W., ZABALZA V., ZANDANEL F., ZANIN R., ZAPATERO J., VERCELLONE S., DONNARUMMA I., D'AMMANDO F. and TAVANI M.

Abstract (from CDS):

We report upper limits to the very high energy flux (E>100GeV) of the flat spectrum radio quasar 3C454.3 (z=0.859) derived by the Cherenkov telescope MAGIC during the high states of July/August and November/December 2007. We compare the upper limits derived in both time slots with the available quasi-simultaneous MeV-GeV data from the AGILE γ-ray satellite and interpret the observational results in the context of leptonic emission models. The source was observed with the MAGIC telescope during the active phases of July-August 2007 and November-December 2007 and the data were analyzed with the MAGIC standard analysis tools. For the periods around the ends of July and November, characterized by the most complete multifrequency coverage, we constructed the spectral energy distributions using our data together with nearly simultaneous multifrequency (optical, UV, X-ray and GeV) data. Only upper limits can be derived from the MAGIC data. The upper limits, once corrected for the expected absorption by the extragalactic background light, together with nearly simultaneous multifrequency data, allow us to constrain the spectral energy distribution of 3C454.3. The data are consistent with the model expectations based on inverse Compton scattering of the ambient photons from the broad line region by relativistic electrons, which robustly predicts a sharp cut-off above 20-30GeV.

Abstract Copyright: ∼

Journal keyword(s): galaxies: quasars: individual: 3C454.3 - gamma rays: observations - gamma rays: theory

Simbad objects: 8

Full paper

View the references in ADS

Number of rows : 8

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	3C 66A	BLL	02 22 39.6114771888	+43 02 07.799534304		15.71	15.21	14.5		~	887	1
2	UGC 1841	Sy1	02 23 11.41124925	+42 59 31.3853324		15.71	14.81			~	561	2
3	8C 0716+714	BLL	07 21 53.4482942664	+71 20 36.363846516		15.5	15.50	14.27		~	1300	1
4	7C 1219+2830	BLL	12 21 31.6904439888	+28 13 58.500308172		16.81	16.11	14.24		~	873	1
5	M 87	AGN	12 30 49.42338414	+12 23 28.0436859	10.16	9.59	8.63		7.49	~	7190	3
6	3C 279	Bla	12 56 11.16657958	-05 47 21.5251510		18.01	17.75	15.87		~	3042	2
7	NAME BL Lac	BLL	22 02 43.2913536816	+42 16 39.979416792		15.66	14.72			~	2258	1
8	3C 454.3	Bla	22 53 57.7480438728	+16 08 53.561508864		16.57	16.10	15.22		~	2847	2

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