A snapshot survey for UV bright Quasars at redshift below 3

Details A snapshot survey for UV bright Quasars at redshift below 3 A snapshot survey for UV bright Quasars at redshift below 3

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7298d&link_type=abstract

HST Proposal ID #7298

Computer Science

Hst Proposal Id #7298 Quasar Absorption Lines

Scientific paper

We propose to take snapshot STIS spectra of 27 quasars with redshift in the range 1.7 -- 3. The goal is to find quasars bright enough in the ultraviolet for spectroscopic follow-up in the range 900 -- 1200 Angstrom . This follow-up would allow the measurement of the ionized helium absorption in the intergalactic medium in the redshift range 2.1 -- 2.9, and the possible detection of high-ionisation metal line systems. The proposed survey should extend the small number of suitable targets already known, allowing a test of the homogeneity of the ionized helium absorption. A potential brighter target with significant void in its Lyman forest would increase the possibility of distinguishing between the absorption from discrete clouds or a truly diffuse component of the IGM.

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