Constraints on Continuum Models of Active Nuclei: Fast Ultraviolet Variations

Details Constraints on Continuum Models of Active Nuclei: Fast Ultraviolet Variations Constraints on Continuum Models of Active Nuclei: Fast Ultraviolet Variations

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992hst..prop.4810w&link_type=abstract

HST Proposal ID #4810

Computer Science

Hst Proposal Id #4810

Scientific paper

We propose to use the Fast Photometer to observe fast-timescale ultraviolet continuum variations in Active Nuclei. The two objects selected have the fastest observed X-ray variations down to 100 seconds, an observational limit set by the satellite sensitivity. Importantly, the Fourier Power-Spectrum of the X-ray data shows no sign that we have yet sampled the fastest variations. The large contribution of starlight, even through the smallest apertures, means that no ground-based experiment can approach the sensitivity to short timescales variations that the HSP can potentially observe. The proposed ultraviolet observations can be made near-simultaneously through two ultraviolet filters, giving crude two color spectral information that will help define the characteristics of the variable component. Using the HSP we can improve the time resolution by an order of magnitude, thus setting strong constraints of models of compact source energy generation.

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