Direct determination of quasar redshifts

Details Direct determination of quasar redshifts Direct determination of quasar redshifts

2001-11-26

arxiv.org/abs/astro-ph/0111476v1

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures; uses aa.cls, psfig.sty, natbib.sty; accepted for publication in A&A Letters

Scientific paper

10.1051/0004-6361:20011660

We present observations of 11 quasars, selected in the range z = 2.2-4.1, obtained with ESA's Superconducting Tunnel Junction (STJ) camera on the WHT. Using a single template quasar spectrum, we show that we can determine the redshifts of these objects to about 1%. A follow-up spectroscopic observation of one QSO for which our best-fit redshift (z = 2.976) differs significantly from the tentative literature value (z ~ 2.30) confirms that the latter was incorrect.

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