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The observed data of visit=80842 contains 20 F stars, which are as faint as ~17 mag and distributed across FoV.
Broad-band magnitudes of science targets (blue) and F stars (red). All objects in pfsConfig are shown (including unobserved objects).
pfiCenter of fibers.
pfsMerged of F stars are shown below. About 6 of them show H-alpha absorption in a low S/N.
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I ran that data through the flux calibration codes. The reduction of the actual observed data revealed found some bugs, which Mineo-san is fixing. The radial velocity estimate failed for the default mask setting, and therefore spectral fitting did not go well. Further tests will be done for the data taken in future observations.
This is NOT a standard way of our flux calibration, but I tried to use the single H alpha line, which is the only detected line. The estimated radial velocities get closer to those measured with Gaussian fitting. I got flux-calibrated spectra, pfsSingle, for 20 FLUXSTDs.
Fig: Comparison between radial velocities measured in the pipeline and those measured by Gaussian fitting by hand. 6 stars with Halpha detection are plotted. The signals of Halpha are weak, and therefore the differences of 1-2 pix look reasonable.
Fig: Gaussian fitting of the 6 stars (yellow lines).
Fig: The best-fit parameters from the stellar typing with the spectra and broad-band SEDs. All 20 stars are plotted. Yellows indicate the 6 stars with Halpha detection.
pfsSingle_fluxstd_ferr.pdf
pfsSingle_fluxstd_Ha_ferr.pdf
Fig: pfsSingle spectra of 20 FLUXSTDs. Full wavelength range and zoom-in to Halpha.
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fitparams.png
pfsMerged_spectra_fluxstd_aroundHa_new_linear.pdf
