Bright Sample

    This sample is the classical "jump and run" sample, the identification mode used for the Einstein Extended Medium Sensitivity Survey (EMSS) and theROSAT Bright Survey (RBS).
    In the case of XMM, the error boxes will be so good and the median counterparts so bright, that only about 1.5 spectra per counterpart are necessary. Spectroscopy can be done with 2m class telescopes.
    Our experience with the RBS is that under good conditions up to 20 objects can be identified per night.

   Out of 1000 objects to be identified in this sample, about 30% may already have catalogue identifications (stars, type I AGN, Abell clusters etc.). We will therefore need about 35 good nights on 2m class telescopes to do most of the job. However, this will clearly be a task spanning several years as the sample of 1000 sources will not be completed before 2 years of operations at a rate of 500 new fields per year.

    For the roughly 20 high-redshift luminous clusters expected in this sample, we would need multi-slit/integral field spectroscopy in a 4m class telescope, but this will happen in future runs.


Last modified 26th August 1999
Text based on AXIS proposal by X.Barcons and the SSC consortium.
Page designed by J.Verdon
www_astro@mssl.ucl.ac.uk