VizieR Online Data Catalog: Abundances of RGs in Galactic globular clusters (Gerber+, 2019)

Spectra were obtained for 67 stars chosen on the basis of various photometric surveys for 19 GCs. Observations of the majority of the stars (60) were obtained at Kitt Peak National Observatory (KPNO) with the Mayall 4 m telescope, while 11 additional stars were observed using the Southern Astrophysical Research Telescope (SOAR). The observations made at KPNO used the 4 m Mayall telescope with the R-C Spectrograph under National Optical Astronomy Observatory (NOAO) Program 2010A-0388. This system employs the UV Fast camera to transmit light to a 2048x2048 Tektronix (T2KB) CCD detector with 24 μm pixels. The dispersive element used was the KPC-007 grating (632 l/mm in first order blazed at 5200 Å), which produces a nominal inverse dispersion of 1.4 Å/pixel at the CCD detector for a resolution of 4 Å FWHM. Wavelength coverage ranged from the violet cutoff to ~5500 Å, and so includes the λ4300 CH band and the λ3883 CN band. The spectrograph was used in the long-slit mode, with a width of 2" (300 μm). For each star, usually 1-2 exposures were taken for total exposure times of 900-1800 s. The observations were made over a five-night period from 2010 June 10 to 14. Observations with the SOAR 4.1 m telescope were made under NOAO Program 2011A-0352 during the three-day period of 2011 July 27-29. The Goodman High Throughput Spectrograph was utilized. The spectrograph was configured with a 600 l/mm diffraction grating, such that the resulting spectra have a resolution of 2.3 Å FWHM and cover a wavelength range from the atmospheric violet cutoff to 6200 Å. A slit width of 3" was used. For each star, two to three exposures were taken to provide 1800 s of total exposure time.

(2 data files).