Physics
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8265p&link_type=abstract
HST Proposal ID #8265
Physics
Hst Proposal Id #8265 Agn Physics
Scientific paper
We will monitor the UV spectral variability of the narrow-line Seyfert 1 {NLS1} galaxy Akn 564 at 46 epochs in order to measure the size of the broad emission-line region via reverberation-mapping techniques. This measurement, and the virial mass estimate that follows from it, will provide a key test of NLS1 models and help determine the physical mechanism that underlies the principal component of AGN spectra, the Boroson-Green primary eigenvector. These observations will be undertaken in parallel with X-ray and ground-based optical observations that will allow us for the first time to explore the multiwavelength variability characteristics of this important subclass of active galactic nuclei. Possible variations in absorption features in the UV resonance lines will also be studied.
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