GGG Dataset

This document describes the GGG dataset.

Sources

The Giant Gemini GMOS (GGG) survey is a spectroscopic survey of z>4.4 quasars drawn from the Sloan Digital Sky Survey and re-observed with the GMOS spectrometer on the Gemini North and South telescopes. The data release is described in Worseck et al. (2014).

Meta Data

The meta data provided with the GGG survey include a considerable set of data related to the SDSS survey. It also includes the redshift measurements on these quasars as described by Worseck et al. (2014).

Spectra

igmspec v02 includes all of the spectra released in the GGG survey. These are flux calibrated, as by Worseck et al. (2014). Relative fluxes should be accurate but the absolute scaling may have significant error (>10%). Every quasar was observed with GMOS using both the R400 and B600 gratings.