3-200 keV spectral states and variability of the INTEGRAL Bl(3)

Fig.2.—(a)20-30keVand(b)40-60keVIBISlightcurvesfromrevolution53torevolution

61.Thehardnessratioderivedfromthetwoenergyrangesisshowninthebottompartofthe gure(c)

On March 2003, IBIS, the gamma-ray imager on board the INTEGRAL satellite, detected an outburst from a new source, IGR J17464-3213, that turned out to be a HEAO-1 transient, H1743-322. In this paper we report on the high energy behaviour of this BHC studie

bd336x280();png_6_0_0_0_0_0_0_918_1188-495-0-412-495.jpg" alt="3-200 keV spectral states and variability of the INTEGRAL Black Hole binary IGR J17464-3213" />

Fig.3.—FluxvspowerlawphotonindexforeverySCW.Thelabelsindicatetherevolutionnumber.

On March 2003, IBIS, the gamma-ray imager on board the INTEGRAL satellite, detected an outburst from a new source, IGR J17464-3213, that turned out to be a HEAO-1 transient, H1743-322. In this paper we report on the high energy behaviour of this BHC studie

Fig.4.—IBISJEM-XandSPIcommonspectraindi erentstatesofthesourceoutburst:thenumbersonthetopofeachspectrumindicatetherevolutionnumberofthecorrespondingINTEGRALobservation.

On March 2003, IBIS, the gamma-ray imager on board the INTEGRAL satellite, detected an outburst from a new source, IGR J17464-3213, that turned out to be a HEAO-1 transient, H1743-322. In this paper we report on the high energy behaviour of this BHC studie

Table1.Fitparametervalues(90%con dence)

RevolutionTin

keVNDiskkTe

keVτpNComp×102χ2νDeg.of

freedom ux(×109erg×cm 2s 1)FluxbandkeV