.. _standard-stars: R04: Standard Star Calibrations =============================== If you have observed Standard Stars during your observing night, you can use these observations to find a calibration to convert observed magnitudes at airmass :math:`X`: :math:`m_X` to *True* magnitudes :math:`m_{\rm true}`. For details see the lecture slides about **Photometry**, specifically slides about *Photometric Calibration*. You can use the following notebook as a **starting point** to using the observed standard star to calibrate your magnitudes. :download:`StandardStars.html` The code uses the following csv file for the data on all the standard stars: :download:`landolt_all.csv`