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J/A+A/587/A65       Visible and near-infrared solar spectra     (Reiners+, 2016)

The IAG solar flux atlas: Accurate wavelengths and absolute convective blueshift in standard solar spectra. Reiners A., Mrotzek N., Lemke U., Hinrichs J., Reinsch K. <Astron. Astrophys. 587, A65 (2016)> =2016A&A...587A..65R (SIMBAD/NED BibCode)
ADC_Keywords: Sun ; Spectra, infrared ; Spectroscopy Keywords: atlases - line: identification - methods: observational - standards - Sun: fundamental parameters Abstract: We present a new solar flux atlas with the aim of understanding wavelength precision and accuracy in solar benchmark data. The atlas covers the wavelength range 405-2300nm and was observed at the Institut fur Astrophysik, Gottingen (IAG), with a Fourier transform spectrograph (FTS). In contrast to other FTS atlases, the entire visible wavelength range was observed simultaneously using only one spectrograph setting. We compare the wavelength solution of the new atlas to the Kitt Peak solar flux atlases and to the HARPS frequency-comb calibrated solar atlas. Comparison reveals systematics in the two Kitt Peak FTS atlases resulting from their wavelength scale construction, and shows consistency between the IAG and the HARPS atlas. We conclude that the IAG atlas is precise and accurate on the order of ±10m/s in the wavelength range 405-1065nm, while the Kitt Peak atlases show deviations as large as several ten to 100m/s. We determine absolute convective blueshift across the spectrum from the IAG atlas and report slight differences relative to results from the Kitt Peak atlas that we attribute to the differences between wavelength scales. We conclude that benchmark solar data with accurate wavelength solution are crucial to better understand the effect of convection on stellar radial velocity measurements, which is one of the main limitations of Doppler spectroscopy at m/s precision. Description: We obtained spectra with two different settings, one visual (VIS) and one near-infrared (NIR). Observations were carried out between March and July 2014. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 32 1251 Absolute convective blueshift of FeI lines measured from the IAG atlas spnir.dat 46 3001260 NIR atlas 1000-2300nm spvis.dat 46 4057462 VIS atlas 405-1065nm
See also: J/A+A/274/555 : Asymmetry of FeI lines in solar spectrum (Stathopoulou+ 1993) J/ApJS/91/461 : EUV spectrum of solar active region (Thomas+, 1994) J/A+AS/103/57 : Ion-atom collisions in Sun atmosphere (Mihajlov+ 1994) J/A+AS/113/71 : Lines in the infrared solar spectrum (Ramsauer+, 1995) J/A+AS/126/281 : Solar disk spectrum (660-1175A) (Curdt+ 1997) J/A+A/370/1071 : Fe XII UV line intensity ratios (Binello+, 2001) J/A+A/375/591 : SUMER Spectral Atlas of Solar Disk Features (Curdt+, 2001) J/A+A/432/1063 : Analysis of inner solar corona in Extreme-UV (Lanzafame+ 2005) J/A+A/507/417 : Oxygen lines in solar granulation. I. (Pereira+, 2009) J/ApJS/181/351 : Solar flux model in 30-1300nm wavelength range (Killen+, 2009) J/A+A/544/A125 : Solar lines from Ceres spectra (Molaro+, 2012) Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 8 F8.4 nm lambda Central wavelengths at rest (Nave et al., 1994, Cat. J/ApJS/94/221) 12- 15 I4 0.1pm EW ?=- Equivalent widths (disc centre) (Allende Prieto+ 1998, Car. J/A+AS/129/41) 19- 22 F4.2 --- relDepth Depth flux at line center relative to unity 26- 32 F7.1 m/s ConvBS ?=- Convective blueshift
Byte-by-byte Description of file: spnir.dat spvis.dat
Bytes Format Units Label Explanations
1- 14 F14.8 cm-1 Wave Wavenumber 17- 33 F17.15 --- nFlux Normalized flux 35- 46 F12.10 --- rFlux Raw (unnormalized) flux
Acknowledgements: Ansgar Reiners, Ansgar.Reiners(at)phys.uni-goettingen.de History: * 17-Feb-2016: First on-line data * 23-Jun-2017: tablea1 added (from author)
(End) Patricia Vannier [CDS] 18-Dec-2015
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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