VizieR Online Data Catalog: GALEX survey subdwarf atmospheric parameters (Nemeth+, 2012)

Low-dispersion optical spectra were obtained at two sites during seven observing runs between 2008 and 2011. At ESO, we used the ESO Faint object Spectrograph and Camera (EFOSC2) attached to the 3.6m NTT at the La Silla Observatory. On ut 2008 October 19-22, 2009 March 2-4 and 2009 August 23-27, we used grism 11 (300-lines/mm) with a dispersion of ~4.17Å per binned pixel (2x2). With a 1-arcsec slit width we obtained a resolution of Δλ~13.7Å. On ut 2010 March 2-4 and 2010 September 18-21 we employed grism 7 (600-lines/mm, ~1.96 Å per binned pixel) and a 1-arcsec slit width resulting in a resolution of Δλ~6.4Å.

At Kitt Peak National Observatory (KPNO) on ut 2010 March 23-26 and 2011 January 28-31 the Ritchey-Chretien Focus Spectrograph (RC spectrograph) was used with the 4-m Mayall telescope and KPC-10A (316lines/mm) grating, delivering a spectral resolution of Δλ~5Å in first order. The slit width was set at 1.5-arcsec resulting in a dispersion of ~2.75Å per pixel.

(4 data files).