Spectroscopic surveys of galaxies at z~1 or more bring the rest-frame ultraviolet into view of large, ground-based telescopes. This spectral region is rich in diagnostics, but these diagnostics have not yet been calibrated in terms of the properties of the responsible stellar population(s). Such calibrations are now possible with Hubble's Next Generation Spectral Library (NGSL). This library contains UV-optical spectra (0.2-1.0 microns) of 378 stars having a wide range in temperature (14,000K to 3700K), luminosity, and metallicity. We have derived the basic stellar parameters from the optical spectral region (0.35 - 1.0 microns) and are using them to calibrate UV spectral diagnostic indices and colors. - From AAS meeting #211, #162.25, Heap and Lindler.

The STIS Next Generation Spectral Library (NGSL) contains STIS spectra of 370 stars observed in HST programs 9088, 9786, and 10222. The Library was produced as part of the archival research program, 'Constraining Both the Star-Formation History and Metal-Enrichment History of Galaxies' (AR10659) and was provided by Don Lindler and Sara Heap. Michael Gregg and David Silva were the PI's for the proposals that obtained the data. Gregg presented an HST calibration workshop paper that gives an overview of the project.

Each spectrum includes spectral segments from gratings G230LB, G430L, and G750L merged to form a single spectrum covering ~0.2-1.0µ. NGSL spectra were constructed via custom pipeline processing followed by corrections for in-order scatter by grating G230LB and corrections for throughput variations caused by the mis-centering of the target in the 0.2 arcsecond-wide slit. All steps are documented in the readme file (PDF) provided by the authors. A summary of the observations and derived stellar parameters is included in section 4 of the readme file.

You may download data from the list of data linked below or ftp it from the anonymous ftp site on archive.stsci.edu then cd /pub/hlsp/stisngsl.

The table at the link below provides some basic information about the data. A preview provided by the team is available by clicking on the "Preview" link. The green line on the preview is the model. You may download the data by clicking on the file name. Some users may need to right click.

LIST OF DATA