Oxygen lines in solar granulation. II. (Pereira+, 2009)

Details Oxygen lines in solar granulation. II. (Pereira+, 2009) Oxygen lines in solar granulation. II. (Pereira+, 2009)

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009ycat..35081403p&link_type=abstract

VizieR On-line Data Catalog: J/A+A/508/1403. Originally published in: 2009A&A...508.1403P

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Sun, Spectroscopy

Scientific paper

We obtained solar observations of several lines at several positions of the solar disk. Data were obtained in May 2007 with the TRIPPEL spectrograph at the Swedish 1-m Solar Telescope (SST). The spectra were obtained for three distinct wavelength windows at ~615, 630 and 777nm. Each window covers approx. 1nm. Here we provide the spatially and temporally averaged spectra. Each spectrum was the average of 50 frames (mu=1.0) or 25 frames (other positions). The frames were selected by the highest continuum contrast, and thus are not regularly spaced in time between the start and end Julian dates.
The observations are given for five positions in the solar disk, ordered by mu, the cosine of the heliocentric angle. The objective was to study the centre-to-limb variation of the lines. Active sun regions were avoided.
Important note: the wavelength scales have NOT been corrected for solar rotation or gravitational redshift.
(4 data files).

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