VizieR Online Data Catalog: Chemical abundances for Hf 2-2 (Liu+, 2006)
Abstract
Hf 2-2 was observed on three photometric nights in June 2001 with the Boller & Chivens long-slit spectrograph mounted on the European Southern Observatory (ESO) 1.52-m telescope. Two wavelength regions were observed. The blue region was observed with a 2400-lines/mm holographic grating, which yielded a dispersion of 32{AA}/mm, or ~0.5{AA}/pix. Some vignetting was observed, in particular on the blue side of this large format CCD, which limited the useful wavelength range to 3540-4800{AA}. A slitwidth of 2arcsec was used for maximum spectral resolution. In addition, in order to obtain magnitudes for the central star, two spectra with slitwidths of 4 and 8arcsec were also obtained.
(2 data files).- Publication:
-
VizieR Online Data Catalog
- Pub Date:
- November 2006
- Bibcode:
- 2006yCat..73681959L
- Keywords:
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- Planetary nebulae;
- Abundances