Image Details
Caption: Fig. 1.
Light curves of (a) DoAr 21, (b) ROXs 21, and (c) ROXs 31 in 0.5–9.0 keV, obtained with Chandra ACIS (observation C1). The vertical axis is the X‐ray count rate normalized in the effective area of 100 cm2 at 1 keV. The bottom arrows indicate the times of the flare and quiescent phases (see Table 2).
© 2002. The American Astronomical Society. All rights reserved. Printed in U.S.A.