Photometry of the z=7.08 quasar ULAS J1120+0641

Details Photometry of the z=7.08 quasar ULAS J1120+0641 Photometry of the z=7.08 quasar ULAS J1120+0641

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sptz.prop80114w&link_type=abstract

Spitzer Proposal ID #80114

Computer Science

Scientific paper

Numerous surveys are underway, or planned, to discover quasars of redshift z>6.5 in order to explore the epoch of cosmic reionisation. In UKIDSS we recently discovered the bright quasar ULAS J1120+0641, of redshift z=7.08, the highest redshift quasar known by a large margin. We propose photometry of this source in Channels 1 and 2 at S/N=30. The Spitzer observations form part of a campaign to measure the multiwavelength SED of the source which will be used to seek evidence for evolution at this very early time. The SED will also provide a benchmark for future surveys for high-redshift quasars to explore the epoch of reionisation at even higher redshifts. Additionally these deep confusion-limited observations will complement any future deep optical and near-ir observations of the field to detect companion galaxies and faint AGN.

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