Problem with pystrometry/gaia_astrometry.py

[JanM1989]

On line 733 in gaia_astrometry.py there is currently the following code:

ppm_signal_mas = orbit.ppm(iad.epoch_data['MJD'].values, psi_deg=np.rad2deg(
np.arctan2(iad.epoch_data['spsi_obs'], iad.epoch_data['cpsi_obs'])),
offsetRA_mas=attribute_dict['offset_alphastar_mas'], offsetDE_mas=attribute_dict['offset_delta_mas'],
externalParallaxFactors=iad.epoch_data['ppfact_obs'], verbose=True)

The code suggests that iad.epoch_data is expected to be a pandas.DataFrame, hence the column is a series, hence the attribute 'values' makes sense. However, using the code in different notebooks showed that the considered object may be an astropy.table in which case the attritube got to be 'value'. A check of the type of iad.epoch_data at least at this point of the code would therefore be reasonable.