SIMBAD references

2006A&A...455..461A - Astronomy and Astrophysics, volume 455, 461-466 (2006/8-4)

Discovery of very high energy γ-ray emission from the BL Lacertae object H2356-309 with the HESS Cherenkov telescopes.

AHARONIAN F., AKHPERJANIAN A.G., BAZER-BACHI A.R., BEILICKE M., BENBOW W., BERGE D., BERNLOEHR K., BOISSON C., BOLZ O., BORREL V., BRAUN I., BREITLING F., BROWN A.M., BUEHLER R., BUESCHING I., CARRIGAN S., CHADWICK P.M., CHOUNET L.-M., CORNILS R., COSTAMANTE L., DEGRANGE B., DICKINSON H.J., DJANNATI-ATAIE A., DRURY L.O'C., DUBUS G., EGBERTS K., EMMANOULOPOULOS D., ESPIGAT P., FEINSTEIN F., FERRERO E., FONTAINE G., FUNK SEB., FUNK S., GALLANT Y.A., GIEBELS B., GLICENSTEIN J.F., GORET P., HADJICHRISTIDIS C., HAUSER D., HAUSER M., HEINZELMANN G., HENRI G., HERMANN G., HINTON J.A., HOFMANN W., HOLLERAN M., HORNS D., JACHOLKOWSKA A., DE JAGER O.C., KHELIFI B., KOMIN N., KONOPELKO A., LATHAM I.J., LE GALLOU R., LEMIERE A., LEMOINE-GOUMARD M., LOHSE T., MARTIN J.M., MARTINEAU-HUYNH O., MARCOWITH A., MASTERSON C., McCOMB T.J.L., DE NAUROIS M., NEDBAL D., NOLAN S.J., NOUTSOS A., ORFORD K.J., OSBORNE J.L., OUCHRIF M., PANTER M., PELLETIER G., PITA S., PUEHLHOFER G., PUNCH M., RAUBENHEIMER B.C., RAUE M., RAYNER S.M., REIMER A., REIMER O., RIPKEN J., ROB L., ROLLAND L., ROWELL G., SAHAKIAN V., SAUGE L., SCHLENKER S., SCHLICKEISER R., SCHWANKE U., SOL H., SPANGLER D., SPANIER F., STEENKAMP R., STEGMANN C., SUPERINA G., TAVERNET J.-P., TERRIER R., THEORET C.G., TLUCZYKONT M., VAN ELDIK C., VASILEIADIS G., VENTER C., VINCENT P., VOELK H.J., WAGNER S.J. and WARD M.

Abstract (from CDS):

The extreme synchrotron BL Lac object H2356-309, located at a redshift of z=0.165, was observed from June to December 2004 with a total exposure of ≃40h live-time with the HESS (High Energy Stereoscopic System) array of atmospheric-Cherenkov telescopes (ACTs). Analysis of this data set yields, for the first time, a strong excess of 453 γ-rays (10 standard deviations above background) from H2356-309, corresponding to an observed integral flux above 200GeV of I(>200GeV)=(4.1±0.5)x10–12/cm2/s (statistical error only). The differential energy spectrum of the source between 200GeV and 1.3TeV is well-described by a power law with a normalisation (at 1TeV) of N0=(3.00±0.80stat+/-0.31sys)x10–13/cm2/s/TeV and a photon index of Γ=3.09±0.24stat±0.10sys. H2356-309 is one of the most distant BL Lac objects detected at very-high-energy γ-rays so far.
Result. from simultaneous observations from ROTSE-III (optical), RXTE (X-rays) and NRT (radio) are also included and used together with the HESS data to constrain a single-zone homogeneous synchrotron self-Compton (SSC) model. This model provides an adequate fit to the HESS data when using a reasonable set of model parameters.

Abstract Copyright: ∼

Journal keyword(s): gamma rays: observations - galaxies: active - galaxies: BL Lacertae objects: individual: H2356-309

Simbad objects: 5

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2006A&A...455..461A and select 'bookmark this link' or equivalent in the popup menu