Image Details
Caption: Fig. 5.
Mean spectrum (top) and differences from the mean obtained by subtracting the individual spectra. The difference spectra are smoothed over ~5 Å and expanded by a factor of 5. The circles show the approximate centroids of the broad absorption feature, and the dashed curve illustrates a best‐fit sine curve through them.
© 2005. The American Astronomical Society. All rights reserved. Printed in U.S.A.