2008ApJ...679.1029T

Query : 2008ApJ...679.1029T

2008ApJ...679.1029T - Astrophys. J., 679, 1029-1039 (2008/June-1)

Simultaneous multiwavelength observations of the blazar 1ES 1959+650 at a low TeV flux.

TAGLIAFERRI G., FOSCHINI L., GHISELLINI G., MARASCHI L., TOSTI G., ALBERT J., ALIU E., ANDERHUB H., ANTORANZ P., BAIXERAS C., BARRIO J.A., BARTKO H., BASTIERI D., BECKER J.K., BEDNAREK W., BEDYUGIN A., BERGER K., BIGONGIARI C., BILAND A., BOCK R.K., BORDAS P., BOSCH-RAMON V., BRETZ T., BRITVITCH I., CAMARA M., CARMONA E., CHILINGARIAN A., COARASA J.A., COMMICHAU S., CONTRERAS J.L., CORTINA J., COSTADO M.T., CURTEF V., DANIELYAN V., DAZZI F., DE ANGELIS A., DELGADO C., DE LOS REYES R., DE LOTTO B., DORNER D., DORO M., ERRANDO M., FAGIOLINI M., FERENC D., FERNANDEZ E., FIRPO R., FONSECA M.V., FONT L., FUCHS M., GALANTE N., GARCIA-LOPEZ R.J., GARCZARCZYK M., GAUG M., GILLER M., GOEBEL F., HAKOBYAN D., HAYASHIDA M., HENGSTEBECK T., HERRERO A., HOHNE D., HOSE J., HUBER S., HSU C.C., JACON P., JOGLER T., KOSYRA R., KRANICH D., KRITZER R., LAILLE A., LINDFORS E., LOMBARDI S., LONGO F., LOPEZ M., LORENZ E., MAJUMDAR P., MANEVA G., MANNHEIM K., MARIOTTI M., MARTINEZ M., MAZIN D., MERCK C., MEUCCI M., MEYER M., MIRANDA J.M., MIRZOYAN R., MIZOBUCHI S., MORALEJO A., NIETO D., NILSSON K., NINKOVIC J., ONA-WILHELMI E., OTTE N., OYA I., PANNIELLO M., PAOLETTI R., PAREDES J.M., PASANEN M., PASCOLI D., PAUSS F., PEGNA R., PERSIC M., PERUZZO L., PICCIOLI A., PRANDINI E., PUCHADES N., RAYMERS A., RHODE W., RIBO M., RICO J., RISSI M., ROBERT A., RUGAMER S., SAGGION A., SAITO T.Y., SANCHEZ A., SARTORI P., SCALZOTTO V., SCAPIN V., SCHMITT R., SCHWEIZER T., SHAYDUK M., SHINOZAKI K., SHORE S.N., SIDRO N., SILLANPAA A., SOBCZYNSKA D., SPANIER F., STAMERRA A., STARK L.S., TAKALO L., TAVECCHIO F., TEMNIKOV P., TESCARO D., TESHIMA M., TORRES D.F., TURINI N., VANKOV H., VENTURINI A., VITALE V., WAGNER R.M., WIBIG T., WITTEK W., ZANDANEL F., ZANIN R., ZAPATERO J. (The MAGIC Collaboration)

Abstract (from CDS):

We present the results from a multiwavelength campaign on the TeV blazar 1ES 1959+650, performed in 2006 May. Data from the optical, UV, soft- and hard-X-ray, and very high energy (VHE) gamma-ray (E>100 GeV) bands were obtained with the Suzaku and Swift satellites, the MAGIC telescope, and other ground-based facilities. The source spectral energy distribution (SED), derived from Suzaku and MAGIC observations at the end of 2006 May, shows the usual double hump shape, with the synchrotron peak at a higher flux level than the Compton peak. With respect to historical values, during our campaign the source exhibited a relatively high state in X-rays and optical, while in the VHE band it was at one of the lowest level so far recorded. We also monitored the source for flux spectral variability on a time window of 10 days in the optical-UV and X-ray bands and 7 days in the VHE band. The source varies more in the X-ray than in the optical band, with the 2-10 keV X-ray flux varying by a factor of ∼2. The synchrotron peak is located in the X-ray band and moves to higher energies as the source gets brighter, with the X-ray fluxes above it varying more rapidly than the X-ray fluxes at lower energies. The variability behavior observed in the X-ray band cannot be produced by emitting regions varying independently and suggests instead some sort of ``standing shock'' scenario. The overall SED is well represented by a homogeneous one-zone synchrotron inverse Compton emission model, from which we derive physical parameters that are typical of high-energy peaked blazars.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: BL Lacertae Objects: Individual: Alphanumeric: 1ES 1959+650 - Galaxies: Active - Galaxies: Jets - X-Rays: Galaxies

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	Sp type	#ref 1850 - 2026	#notes
1	M 1	SNR	05 34 31.8	+22 01 03					~	6516	1
2	Z 184-50	BLL	11 04 27.3140835504	+38 12 31.798495872		13.50	12.90	8.31	~	2841	1
3	Z 225-7	BLL	16 53 52.21668403	+39 45 36.6088754	14.09	14.15	13.29	8.26	~	2304	2
4	QSO B1959+650	BLL	19 59 59.8520303688	+65 08 54.652536492			12.8	11.21	~	699	2
5	PKS J2158-3013	BLL	21 58 52.0652249880	-30 13 32.118447792		13.36	13.09	12.62	~	1829	1

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