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Title:
Broadband Comparisons between the Multiwavelength Behavior of Two Interesting X-ray Novae, XTE J1817-330 and XTE J1818-245
Authors:
Cadolle Bel, Marion; Kuulkers, Erik; Barragan, L.; Rodriguez, J.; Prat, L.; Chaty, S.; Zurita-Heras, J.; Corbel, S.; Goldoni, P.; Goldwurm, A.; Ribó, M.; Moldón, J.; D'Avanzo, P.; Campana, S.
Affiliation:
AA(ESAC, Villan~ueva de la Can~ada, Madrid, Spain), AB(ESAC, Villan~ueva de la Can~ada, Madrid, Spain), AC(ESAC, Villan~ueva de la Can~ada, Madrid, Spain), AD(Sap, CEA-Saclay/AIM/APC, Paris, France), AE(Sap, CEA-Saclay/AIM/APC, Paris, France), AF(Sap, CEA-Saclay/AIM/APC, Paris, France), AG(Sap, CEA-Saclay/AIM/APC, Paris, France), AH(Sap, CEA-Saclay/AIM/APC, Paris, France), AI(Sap, CEA-Saclay/AIM/APC, Paris, France), AJ(Sap, CEA-Saclay/AIM/APC, Paris, France), AK(Universitat de Barcelona, Spain), AL(Universitat de Barcelona, Spain), AM(INAF, Osservatorio Astronomico di Brera, Merate and Università degli Studi dell'Insubria, Como, Italy), AN(INAF, Osservatorio Astronomico di Brera, Merate and Università degli Studi dell'Insubria, Como, Italy)
Publication:
A POPULATION EXPLOSION: The Nature & Evolution of X-ray Binaries in Diverse Environments. AIP Conference Proceedings, Volume 1010, pp. 64-68 (2008). (AIPC Homepage)
Publication Date:
05/2008
Origin:
AIP
Keywords:
X-ray binary stars, X-ray sources (astronomical), Galactic centre, black holes
DOI:
10.1063/1.2945091
Bibliographic Code:
2008AIPC.1010...64C

Abstract

The INTEGRAL satellite extensively observed XTE J1817-330 and XTE J1818-245 which underwent X-ray outbursts from, respectively, Jan. 2006 and Feb. 2005 to Nov. 2006, during the INTEGRAL Core Program and Target of Opportunity observations, dedicated to new X-ray novae, and during Galactic Bulge observations. We report some results of simultaneous multiwavelength observations of these black holes candidates performed with INTEGRAL, RXTE and with REM and ATCA for XTE J1817-330 and Swift, VLA, REM and EMMI for XTE J1818-245. Both sources are active up to 250 keV. Component evolutions occur in the accretion disk and in the hot medium (well fitted by Comptonization), with spectral changes in the hard and soft components correlated with puzzling changes in the radio and excess over a black body disk in the optical.
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