XSL: The X-Shooter Spectral Library
CoIs: Y.P. Chen (U. Groningen), P. Hauschildt (U. Hamburg), A.
Lançon (Obs.
Strasbourg), P. Prugniel (Obs. Lyon), D. Silva (NOAO), A. Vazdekis (IAC)
Associates: J. Cenarro (CEFCA), J.
Falcón Barroso (IAC), M. Koleva (IAC), E. Marmól
Queraltó (IAC), P. Sánchez Blázquez (UAM), J.
Walcher (AIP)
XSL is an on-going project to produce the largest homogeneous library
of stellar spectra covering simultaneously the entire wavelength range
from 3200Å to 2.5 µm to date using the X-Shooter
spectrograph mounted on UT2
at ESO's VLT.
To date, 251 observations of 236 unique stars have been made; including
calibration stars (flux and telluric correction stars), the total
number of stars observed is over 500. A complete table of stars
observed for XSL can be found here.
Here is a Hertzsprung-Russell diagram of the 114 XSL stars with known
effective temperature (increasing from right to left) and gravity
(increasing from top to bottom).
Here is the distribution of metallicities of the 100 XSL stars with
known metallicites.
Here are the spectral types of the XSL sample (excluding calibration
stars), retrieved from the SIMBAD database or based on educated guesses
from the literature source or atmospheric parameters. "C" are
carbon stars (C-rich AGB stars). "LPV" are long-period variables
of unknown type (O- or C- rich).
Here are a handful of example XSL spectra. In the left-hand
(UV+visible) panels, the spectra have been placed onto a consistent
flux scale; this is not true for the NIR spectra, so the instrumental
response is obvious from the strong "bump" feature at 2.1
µm. Telluric corrections have not been applied to these
spectra.
