4. RESULTS (I)

• Selection process of initial standards: we eliminate stars with peculiar spectra, variables, multiple systems and AVɭ mag.

• Initially:

• We need the biggest possible spectral range. Possibly, we can accept the [A0V-A7V]+[G5III-M2III] interval.
  
  

We only use calibrated stars of spectral types AV and KIII for the spectroscopy, but in photometry, we can potentially use all of them in broad band if we have calibrated that band.

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