Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: First results from the Isaac Newton Telescope Wide Angle Survey: The z>5
  quasar survey   We report the first results of an observational program designed to determine
the luminosity density of high redshift quasars (z > 5 quasars) using deep
multi-colour CCD data. We report the discovery and spectra of 3 i < 21.5 high
redshift (z > 4.4) quasars, including one with z > 5. At z=5.17, this is the
fourth highest redshift quasar currently published. Using these preliminary
results we derive an estimate of the M \rm_B < - 25.0 (M \rm_{AB1450} < - 24.5)
quasar space density in the redshift range 4.8 < z < 5.8 of 3.6 \pm2.5\times
10^{-8} \Mpc ^{-3} . When completed the survey will provide a firm constraint
on the contribution to the ionizing UV background in the redshift range 4.5 -
5.5 from quasars by determining the faint end slope of the quasar luminosity
function. The survey uses imaging data taken with the 2.5m Isaac Newton
Telescope as part of the Public Isaac Newton Group Wide Field Survey (WFS).
This initial sample of objects is taken from two fields of effective area $\sim
12.5deg ^2$ from the final $\sim 100deg ^2$.

15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con