Joint PCA/RXTE and IBIS/INTEGRAL observation of Sco X-1. The spectrum was fitted by a model with a normalization constant (between PCA and IBIS), photoelectric absorption, plus a comptt and powerlaw components. Because the PCA cannot constrain the equivalent hydrogen column for the absorption, its value was fixed at a value of 4. The plasma temperature (derived from comptt model) is . The reduced χ² is 1.3. Also displayed in the figure are the relative contributions (at the IBIS part of the fit) from the comptt and pegpw components.