Investigating High-Temperature Big Bumps in AGN

Details Investigating High-Temperature Big Bumps in AGN Investigating High-Temperature Big Bumps in AGN

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.6600p&link_type=abstract

HST Proposal ID #6600

Computer Science

Hst Proposal Id #6600 Agn

Scientific paper

We propose HST-FOS observations of an AGN which has one of thehottest optical to soft X-ray `big bumps' identified to date.QSO1034+3938 is a narrow-line Seyfert 1 galaxy (z=0.042) whichshows no trace of the big blue bump in the optical and a highenergy turnover of the big bump in soft X-rays; theseproperties are both highly unusual. Theexistence of such high-temperature components stretchesmodels of the optical to X-ray big bump to unprecedentedlimits. HST-FOS spectra of this AGN will provide keyobservational tests for these models as well as diagnostics ofthe effect of the big bump on UV line emission in the high-temperature extreme. We plan to investigate the UV spectrum ofQSO1034+3938 and: (1) characterize the continuum shape; (2)measure UV line FWHM and fluxes; and (3) search for the low energytail of the big bump and investigate a possible optical/UVpower-law component in QSO1034+3938.

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