2012A&A...544A..96A

Query : 2012A&A...544A..96A

2012A&A...544A..96A - Astronomy and Astrophysics, volume 544A, 96-96 (2012/8-1)

MAGIC observations of the giant radio galaxy M 87 in a low-emission state between 2005 and 2007.

ALEKSIC J., ALVAREZ E.A., ANTONELLI L.A., ANTORANZ P., ASENSIO M., BACKES M., BARRIO J.A., BASTIERI D., BECERRA GONZALEZ J., BEDNAREK W., BERDYUGIN A., BERGER K., BERNARDINI E., BILAND A., BLANCH O., BOCK R.K., BOLLER A., BONNOLI G., BORLA TRIDON D., BRAUN I., BRETZ T., CANELLAS A., CARMONA E., CAROSI A., COLIN P., COLOMBO E., CONTRERAS J.L., CORTINA J., COSSIO L., COVINO S., DAZZI F., DE ANGELIS A., DE CANEVA G., DE CEA DEL POZO E., DE LOTTO B., DELGADO MENDEZ C., DIAGO ORTEGA A., DOERT M., DOMINGUEZ A., DOMINIS PRESTER D., DORNER D., DORO M., ELSAESSER D., FERENC D., FONSECA M.V., FONT L., FRUCK C., GARCIA LOPEZ R.J., GARCZARCZYK M., GARRIDO D., GAUG M., GIAVITTO G., GODINOVIC N., HADASCH D., HAEFNER D., HERRERO A., HILDEBRAND D., HOEHNE-MOENCH D., HOSE J., HRUPEC D., HUBER B., JOGLER T., KELLERMANN H., KLEPSER S., KRAEHENBUEHL T., KRAUSE J., LA BARBERA A., LELAS D., LEONARDO E., LINDFORS E., LOMBARDI S., LOPEZ M., LOPEZ-ORAMAS A., LORENZ E., MAKARIEV M., MANEVA G., MANKUZHIYIL N., MANNHEIM K., MARASCHI L., MARIOTTI M., MARTINEZ M., MAZIN D., MEUCCI M., MIRANDA J.M., MIRZOYAN R., MIYAMOTO H., MOLDON J., MORALEJO A., MUNAR-ADROVER P., NIETO D., NILSSON K., ORITO R., OYA I., PANEQUE D., PAOLETTI R., PARDO S., PAREDES J.M., PARTINI S., PASANEN M., PAUSS F., PEREZ-TORRES M.A., PERSIC M., PERUZZO L., PILIA M., POCHON J., PRADA F., PRADA MORONI P.G., PRANDINI E., PULJAK I., REICHARDT I., REINTHAL R., RHODE W., RIBO M., RICO J., RUEGAMER S., SAGGION A., SAITO K., SAITO T.Y., SALVATI M., SATALECKA K., SCALZOTTO V., SCAPIN V., SCHULTZ C., SCHWEIZER T., SHAYDUK M., SHORE S.N., SILLANPAEAE A., SITAREK J., SNIDARIC I., SOBCZYNSKA D., SPANIER F., SPIRO S., STAMATESCU V., STAMERRA A., STEINKE B., STORZ J., STRAH N., SURIC T., TAKALO L., TAKAMI H., TAVECCHIO F., TEMNIKOV P., TERZIC T., TESCARO D., TESHIMA M., TIBOLLA O., TORRES D.F., TREVES A., UELLENBECK M., VANKOV H., VOGLER P., WAGNER R.M., WEITZEL Q., ZABALZA V., ZANDANEL F., ZANIN R. and GHISELLINI G.

Abstract (from CDS):

We present the results of a long M 87 monitoring campaign in very high energy γ-rays with the MAGIC-I Cherenkov telescope. We aim to model the persistent non-thermal jet emission by monitoring and characterizing the very high energy γ-ray emission of M 87 during a low state. A total of 150h of data were taken between 2005 and 2007 with the single MAGIC-I telescope, out of which 128.6h survived the data quality selection. We also collected data in the X-ray and Fermi-LAT bands from the literature (partially contemporaneous). No flaring activity was found during the campaign. The source was found to be in a persistent low-emission state, which was at a confidence level of 7σ. We present the spectrum between 100GeV and 2TeV, which is consistent with a simple power law with a photon index Γ=2.21±0.21 and a flux normalization at 300GeV of (7.7±1.3)x10^–8/TeV/s/m². The extrapolation of the MAGIC spectrum into the GeV energy range matches the previously published Fermi-LAT spectrum well, covering a combined energy range of four orders of magnitude with the same spectral index. We model the broad band energy spectrum with a spine layer model, which can satisfactorily describe our data.

Abstract Copyright: ∼

Journal keyword(s): galaxies: individual: M 87 - gamma rays: galaxies

Simbad objects: 4

Full paper

View the references in ADS

Number of rows : 4

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag I	Sp type	#ref 1850 - 2023	#notes
1	M 1	SNR	05 34 30.9	+22 00 53					~	6095	1
2	NAME Virgo Cluster	ClG	12 26 32.1	+12 43 24					~	6508	0
3	NAME Knot in M87 Jet	PoG	12 30 49.355	+12 23 28.32					~	202	0
4	M 87	AGN	12 30 49.42338414	+12 23 28.0436859	10.16	9.59	8.63	7.49	~	7020	3

To bookmark this query, right click on this link: simbad:objects in 2012A&A...544A..96A and select 'bookmark this link' or equivalent in the popup menu