The ZeroPoint routine attempts to retrieve spectra from the Gaia archive, if they have not already been retrieved. But not all Gaia stars have spectra, and there is no attempt to either use the Gaia catalog to determine whether a spectrum is expected, or to record previous attempts to get the spectrum of a star. This slows Zeropoint.py down considerably. While this in some sense is only a perfomance issue, it would be desirable to fix this.
The ZeroPoint routine attempts to retrieve spectra from the Gaia archive, if they have not already been retrieved. But not all Gaia stars have spectra, and there is no attempt to either use the Gaia catalog to determine whether a spectrum is expected, or to record previous attempts to get the spectrum of a star. This slows Zeropoint.py down considerably. While this in some sense is only a perfomance issue, it would be desirable to fix this.