Source/back counts: number of photons in the source and backgnd regions Area ratio: the ratio of the source to background region areas Exposure: The exposure time at the centre of the source region EEF: The encircled energy factor used in the calculation Obsid: The identifier for the observation Dates: The start and end date of the observation Bckgnd subtracted source c/r: The source count rate and error after background subtraction and correction for the EEF.