Image Details
Caption: Fig. 7.
Variability (V) vs. rest‐frame time lag (Δτ) for 2181 quasars from large time lag plates. The 364 quasars with values of V greater than 2.5 are selected to be candidates for the variable quasar sample.
© 2005. The American Astronomical Society. All rights reserved. Printed in U.S.A.