Other
Scientific paper
Aug 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000noao.prop...72p&link_type=abstract
NOAO Proposal ID #2000B-0072
Other
Scientific paper
We propose to use the CTIO 0.9m to monitor PKS 2005--489, a bright and highly variable blazar, in conjunction with approved, simultaneous RXTE, EUVE, and ground-based optical, radio and TeV observations. Previous multiwavelength monitoring campaigns on blazars have found complex variability behavior, involving different modes and likely reflecting a complex mix of jet structure and emission mechanisms. This variety of behaviors illustrates the need to study additional objects, which can provide different perspectives. Our goals are to study in great detail the spectral energy distribution of PKS 2005--489 from radio to TeV energies, and to determine the correlated multifrequency flux and spectral variability of this source. Optical monitoring will allow cross-correlations of the optical, X-ray and EUV light curves to separate lags on timescales of hours to days. When combined with already-obtained time at African and Australian observatories, CTIO observations will allow 24-hour coverage in the optical. 24-hour coverage is critical to reliably obtaining lags between the optical and other bands. Measuring lags between high and low-energy photons will enable us to determine the physics of the jet (e.g., particle acceleration vs. injection). Such studies of blazars offer a unique opportunity to learn about the physics of relativistic jets and, ultimately, the physical conditions around the AGN itself.
Madejski Greg
Perlman Eric Steven
Rector Travis A.
Sambruna Rita
Urry Claudia Megan
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