2006ApJ...639..761A

Query : 2006ApJ...639..761A

2006ApJ...639..761A - Astrophys. J., 639, 761-765 (2006/March-2)

Observation of very high energy gamma-ray emission from the active galactic nucleus 1ES 1959+650 using the MAGIC telescope.

ALBERT J., ALIU E., ANDERHUB H., ANTORANZ P., ARMADA A., ASENSIO M., BAIXERAS C., BARRIO J.A., BARTKO H., BASTIERI D., BEDNAREK W., BERGER K., BIGONGIARI C., BILAND A., BISESI E., BOCK R.K., BRETZ T., BRITVITCH I., CAMARA M., CHILINGARIAN A., CIPRINI S., COARASA J.A., COMMICHAU S., CONTRERAS J.L., CORTINA J., DANIELYAN V., DAZZI F., DE ANGELIS A., DE LOS REYES R., DE LOTTO B., DOMINGO-SANTAMARIA E., DORNER D., DORO M., ERRANDO M., FERENC D., FERNANDEZ E., FIRPO R., FLIX J., FONSECA M.V., FONT L., GALANTE N., GARCZARCZYK M., GAUG M., GEBAUER J., GIANNITRAPANI R., GILLER M., GOEBEL F., HAKOBYAN D., HAYASHIDA M., HENGSTEBECK T., HOHNE D., HOSE J., JACON P., KALEKIN O., KRANICH D., LAILLE A., LENISA T., LIEBING P., LINDFORS E., LONGO F., LOPEZ J., LOPEZ M., LORENZ E., LUCARELLI F., MAJUMDAR P., MANEVA G., MANNHEIM K., MARIOTTI M., MARTINEZ M., MASE K., MAZIN D., MERCK C., MERCK M., MEUCCI M., MEYER M., MIRANDA J.M., MIRZOYAN R., MIZOBUCHI S., MORALEJO A., NILSSON K., ONA-WILHELMI E., ORDUNA R., OTTE N., OYA I., PANEQUE D., PAOLETTI R., PASANEN M., PASCOLI D., PAUSS F., PAVEL N., PEGNA R., PERUZZO L., PICCIOLI A., PIN M., PRANDINI E., RICO J., RHODE W., RIEGEL B., RISSI M., ROBERT A., ROSSATO G., RUGAMER S., SAGGION A., SANCHEZ A., SARTORI P., SCALZOTTO V., SCHMITT R., SCHWEIZER T., SHAYDUK M., SHINOZAKI K., SIDRO N., SILLANPAA A., SOBCZYNSKA D., STAMERRA A., STARK L., TAKALO L., TEMNIKOV P., TESCARO D., TESHIMA M., TONELLO N., TORRES A., TORRES D.F., TURINI N., VANKOV H., VITALE V., WAGNER R.M., WIBIG T., WITTEK W. and ZAPATERO J.

Abstract (from CDS):

The MAGIC Cerenkov telescope has observed very high energy (VHE) γ-ray emission from the active galactic nucleus 1ES 1959+650 during 6 hr in 2004 September and October. The observations were carried out alternating with observations of the Crab Nebula, whose data were used as a reference source for optimizing γ -ray/hadron separation and for flux comparison. The data analysis shows VHE γ-ray emission of 1ES 1959+650 with ∼8 σ significance, at a time of low activity in both optical and X-ray wavelengths. An integral flux above ∼180 GeV of about 20% that of the Crab Nebula was obtained. The light curve, sampled over 7 days, shows no significant variations. The differential energy spectrum between 180 GeV and 2 TeV can be fitted with a power-law of index -2.72±0.14. The spectrum is consistent with the slightly steeper spectrum seen by HEGRA at higher energies, also during periods of low X-ray activity.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Active - galaxies: individual (1ES 1959+650) - Gamma Rays: Observations

Simbad objects: 4

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Number of rows : 4
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 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
2 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5476 0
3 Z 184-50 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2841 1
4 QSO B1959+650 BLL 19 59 59.8520303688 +65 08 54.652536492     12.8 11.21   ~ 699 2

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