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This is service that does not comply with any IVOA standard but instead provides access to special capabilities specific to this resource.
VO Compliance: Level 2: This is a VO-compliant resource. Available endpoints for this service interface:
- URL-based interface: http://dc.g-vo.org/sp_ace/q/c/api?
- This interface supports the following
arguments:
UPLOAD- An upload of the form 'spectrum,URL'; the input for this parameter is then taken from URL, which may be param:name for pulling the content from the inline upload name. Purpose of the upload: ASCII file with two columns: wavelength (in Angstrom) and continuum normalized flux. The spectrum must be radial velocity corrected (wavelengths in rest frame). The spectral resolution power should be between 2000 and 20000. SP_Ace handles spectra in the stellar parameters intervals Teff=[3600,7400]K, logg=[0.2,5.0], [M/H]=[-2.4,0.4]dex.
Value Type: char
fwhm- Starting value for estimation of FWHM of the instrument line profile.
Value Type: real
Unit: Angstrom
Unified Content Descriptor (UCD): spect.line.width;instr
wave_lims- Give up to five wavelength intervals you want to analyze, starting from the lowest. Intervals not covered by the library will be ignored. The default setting is the range of wavelenghts currently processed by the software.
Value Type: char
tforce- Force solver to assume this temperature. Leave empty to let SP_Ace estimate this parameter.
Value Type: real
Unit: K
Unified Content Descriptor (UCD): stat.param;phys;temperature.effective
gforce- Force solver to assume this gravity. Leave empty to let SP_Ace estimate this parameter.
Value Type: real
Unified Content Descriptor (UCD): stat.param;phys.gravity
snrforce- Force solver to assume this signal to noise ratio on every pixel. Suggestion: Leave empty to let SP_Ace to estimate this parameter pixel-by-pixel.
Value Type: real
Unified Content Descriptor (UCD): stat.param;stat.snr
rv_ini- Provide an estimation of the object's radial velocity in case the spectrum is not RV-corrected.
Value Type: real
Unit: km/s
Unified Content Descriptor (UCD): spect.dopplerVeloc
compute_errors- Make SP_Ace estimate errors (this increases runtime significantly).
Value Type: char
alpha- If selected, the output will only contain two abundances: 'alphas' and 'metals', which are the estimation of the abundances of alpha-process elements and non-alpha-process elements as if they were one element. Hint: This option is mostly useful with low-resolution (R ~ 2000) spectra. See the tutorial for more details.
Value Type: char
no_norm- Process the spectrum with the normalization provided by the user? This option switches off the internal re-normalization done by SP_Ace. Suggestion: Do not set unless you are absolutely sure that your normalization is right.
Value Type: char
norm_rad- This parameter determines the flexibility of the curve used to fit the continuum during the re-normalization of the spectrum. The higher the number the more rigid the curve is (see discussion in the tutorial and in Sec.7.4 of the paper). Suggestion: leave the default value unless you know very well what you are doing.
Value Type: real
abd_loop- Switch on the loop that iteratively derives stellar parameters (Teff, log g, [M/H]) and chemical abundances. Suggestion: do not set (see Sec. 8.5.1 of the paper). If your spectrum has low resolution (R ~ 2000), see discussion in the tutorial.
Value Type: char
responseformat- File format requested for output.
Value Type: char
Unified Content Descriptor (UCD): meta.code.mime
maxrec- Maximum number of records returned. Pass 0 to retrieve service parameters.
Value Type: integer
verb- Exhaustiveness of column selection. VERB=1 only returns the most important columns, VERB=2 selects the columns deemed useful to the average user, VERB=3 returns a table with all available columns.
Value Type: integer
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