Direct determination of quasar redshifts

2); Alastair Reynolds (1); Anthony Peacock (1); Didier Martin (1); ESTEC; (2) Sterrewacht Leiden; (3) Hamburger Sternwarte); Fabio Favata (1); Jos de Bruijne (1); Michael Perryman (1; Nicola Rando (1); Norbert Christlieb (3) ((1) Astrophysics

arxiv: astro-ph/0111476 · v1 · submitted 2001-11-26 · 🌌 astro-ph

Direct determination of quasar redshifts

Jos de Bruijne (1) , Alastair Reynolds (1) , Michael Perryman (1 , 2) , Anthony Peacock (1) , Fabio Favata (1) , Nicola Rando (1) , Didier Martin (1)

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Peter Verhoeve (1) Norbert Christlieb (3) ((1) Astrophysics Research Divisions Space Science Department of ESA ESTEC; (2) Sterrewacht Leiden; (3) Hamburger Sternwarte)

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keywords quasarredshiftsbest-fitcameraconfirmsdeterminationdeterminediffers

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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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Direct determination of quasar redshifts

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