Image Details
 
                    Caption: Fig. 10.
Spectral changes associated with a 1 mHz QPO observed on March 31. Top: Background‐subtracted PCA spectra accumulated at peaks and bottoms of the QPO, as specified on the 2–30 keV light curve (inset). Middle: Residuals from NPEX fits to the two spectra. Bottom: QPO bottom‐to‐peak ratio.
© 2006. The American Astronomical Society. All rights reserved. Printed in U.S.A.