Intergalactic-Ionized Helium toward HS 1700+6416 at maximum QSO brightness

Details Intergalactic-Ionized Helium toward HS 1700+6416 at maximum QSO brightness Intergalactic-Ionized Helium toward HS 1700+6416 at maximum QSO brightness

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002hst..prop.9982r&link_type=abstract

HST Proposal ID #9982

Computer Science

Hst Proposal Id #9982

Scientific paper

We propose to measure the UV energy distribution of HS 1700+6416 {z=2.73} in the range 1200-3000 A. Scientific background is that HS 1700 has been observed recently by FUSE in a long integration {390 ksec}. Due to an unexpected brightening of the QSO by a factor of 3 to 4 compared to earlier FUSE and HUT observations the new observations yielded a HeII forest spectrum of spectacular quality. The aim of the proposed HST observation is to measure the UV energy distribution of HS 1700 the knowledge of which is essential for an optimal evaluation of the FUSE HeII spectrum.

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