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| Paper: |
Monitoring Quasar Color Variability in Stripe 82 |
| Volume: |
460, AGN Winds in Charleston |
| Page: |
124 |
| Authors: |
Rogerson, J. A.; Hall, P. B.; MacLeod, C.; Ivezić, Ž. |
| Abstract: |
Broad Absorption Line (BAL) trough variability is predominantly due to
cloud motion transverse to our line of sight. The rate at which the
variability occurs indicates the velocity of the cloud, and that can
provide constraints on the cloud's distance from the central source.
Measuring this requires detailed spectroscopy during a variability
event. Such spectra have proven elusive, suggesting either the
timescale of variability is too short to be caught, or too long to
notice until a sufficient amount of time has passed. Photometric
monitoring of BAL quasar colors may potentially be used as an early
warning system to trigger time-resolved spectroscopic monitoring of
BAL variability. Towards this end, we are analyzing both BAL and
non-BAL color variability using time series photometry from Stripe 82
in the Sloan Digital Sky Survey. |
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