Segue: A Spectroscopic Survey of 240,000 Stars With g = 14-20
Abstract
The Sloan Extension for Galactic Understanding and Exploration (SEGUE) Survey obtained nearly equal to 240,000 moderate-resolution (R difference 1800) spectra from 3900 Angstrom to 9000 Angstom of fainter Milky Way stars (14.0 < g < 20.3) of a wide variety of spectral types, both main-sequence and evolved objects, with the goal of studying the kinematics and populations of our Galaxy and its halo. The spectra are clustered in 212 regions spaced over three quarters of the sky. Radial velocity accuracies for stars are sigma (RV) tilde 4 km s(exp -1) at g < 18, degrading to sigma (RV) tilde 15 km s(exp-1) at g tilde 20. For stars with signal-to-noise ratio >10 per resolution element, stellar atmospheric parameters are estimated, including metallicity, surface gravity, and effective temperature. SEGUE obtained 3500 deg(exp 2) of additional ugriz imaging (primarily at low Galactic latitudes) providing precise multicolor photometry (sigma(g, r, i) tilde 2%), (sigma(u, z) tilde 3%) and astrometry (approx. 0.1) for spectroscopic target selection. The stellar spectra, imaging data, and derived parameter catalogs for this survey are publicly available as part of Sloan Digital Sky Survey Data Release 7.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 2009
- Accession Number
- ADA499412
Entities
People
- Bonnie Alcorn
- Brian Yanny
- Carlos A. Prieto
- Constance Rockosi
- Coryn A. Bailer-jones
- Deokkeun An
- Dmitry Bizyaev
- Eric Bell
- Gillian R. Knapp
- Heidi J. Newberg
- Jennifer K. Adelman-mccarthy
- John J. Bochanski
- Kurt S. Anderson
- Norm Blythe
- Sahar Allam
- Scott L. Anderson
- Steve Bastian
- Timothy C. Beers
- Vasily Belokurov
- William N. Boroski
Organizations
- Fermilab