Physics
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8144k&link_type=abstract
HST Proposal ID #8144
Physics
Hst Proposal Id #8144 Agn Physics
Scientific paper
We propose a UV spectroscopic snapshot survey of AGN scheduled to be observed by the Far Ultraviolet Spectroscopic Explorer {FUSE}. The FUSE GTO program includes all AGN with known far- UV fluxes in excess of 1.5 * 10^-14 erg cm^-2 s^-1 A^-1 over the 900-1200 A wavelength range. Of these, 88 are low-redshift AGN with z < 0.3. Contemporaneous STIS/MAMA observations using gratings G140L and G230L will give complete coverage of all UV resonance absorption and emission lines from the Lyman limit to Mg II. A 31-minute snapshot with exposures divided between G140L and G230L will yield spectra with a minimum S/N of 15 per resolution element at all wavelengths for all these targets. In addition to the emission line measurements, we will be sensitive to intrinsic absorption lines to a limiting equivalent width of 0.3 A at the 3-sigma level. Finally, in combination with the FUSE spectra, we will measure the continuum shape across the peak of the ``big blue bump", permitting us to see if the 1000 Angstrom break found in the HST composite quasar spectrum by Zheng et al. is present in the lowest redshift AGN.
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