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Each observation in Peranso is defined by following attributes:
- Time (mostly Julian Date, JD. Can be Geocentric or Heliocentric)
- Brightness (mostly magnitude)
- Brightness Error [optional]: the error in the brightness estimate. A Brightness Error value is visually represented as a 'vertical bar' centered around the corresponding brightness dot in the light curve. The bar extends above and below the observation by the amount of the error. For example, if the brightness error is 0.1 mag, the total bar height is 0.2 mag, indicating the value is meant to be taken as +/- the amount. Brightness error values are taken into account when performing a period analysis calculation when using the FALC method.
- Use status [optional]. Has a value of 0 or 1 and determines if an observation is considered to be active (1) or inactive (0). Inactive observations (and fainter-than observations) are not taken into account when performing a period analysis calculation. Observations can be made active and inactive at every moment, using the mouse and keyboard. An active observation is plotted as a filled symbol (circle, square or triangle) in an ObsWin. Inactive observations appear as open symbols.
- Filter [optional]: describes the filter associated with the observation. This attribute is supported in most (but not all) Observations Windows, e.g. filters appear in AAVSO, ASAS-SN and ZTF light curves, but also in LesvePhotometry AAVSO and CBA report files.
- Observer [optional]: describes the name or initials of the observer associated with the observation. This attribute is only supported by specific Observations Windows, e.g. when they contain an AAVSO or ASAS-SN light curve, or a LesvePhotometry AAVSO or CBA report file.
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