Hostname: page-component-78c5997874-94fs2 Total loading time: 0 Render date: 2024-11-19T09:26:00.164Z Has data issue: false hasContentIssue false
  • English
  • Français

Quasar variability measurements with SDSS repeated imaging and POSS data

Published online by Cambridge University Press:  01 December 2004

Ž. Ivezić ,
R. H. Lupton ,
M. Jurić ,
S. Anderson ,
P. B. Hall ,
G. T. Richards ,
C. M. Rockosi ,
D. E. Vanden Berk ,
E. L. Turner  and
G. R. Knapp
...Show all authors
Ž. Ivezić
Affiliation:
Princeton University, Princeton, USA University of Washington, Seattle, USA
R. H. Lupton
Affiliation:
Princeton University, Princeton, USA
M. Jurić
Affiliation:
Princeton University, Princeton, USA
S. Anderson
Affiliation:
University of Washington, Seattle, USA
P. B. Hall
Affiliation:
Princeton University, Princeton, USA
G. T. Richards
Affiliation:
Princeton University, Princeton, USA
C. M. Rockosi
Affiliation:
University of Washington, Seattle, USA
D. E. Vanden Berk
Affiliation:
University of Pittsburgh, Pittsburgh, USA
E. L. Turner
Affiliation:
Princeton University, Princeton, USA
G. R. Knapp
Affiliation:
Princeton University, Princeton, USA
J. E. Gunn
Affiliation:
Princeton University, Princeton, USA
D. Schlegel
Affiliation:
Princeton University, Princeton, USA
M. A. Strauss
Affiliation:
Princeton University, Princeton, USA
D. P. Schneider
Affiliation:
The Pennsylvania State University, University Park, USA
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We analyze the properties of quasar variability using repeated SDSS imaging data in five UV-to-far red photometric bands, accurate to 0.02 mag, for ∼13,000 spectroscopically confirmed quasars. The observed time lags span the range from 3 hours to over 3 years, and constrain the quasar variability for rest-frame time lags of up to two years, and at rest-frame wavelengths from 1000Å to 6000Å. We demonstrate that ∼66,000 SDSS measurements of magnitude differences can be described within the measurement noise by a simple function of only three free parameters. The addition of POSS data constrains the long-term behavior of quasar variability and provides evidence for a turn-over in the structure function. This turn-over indicates that the characteristic time scale for optical variability of quasars is of the order 1 year.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
POSTERS
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS222 , March 2004 , pp. 525 - 526
Copyright
© 2004 International Astronomical Union