SuperWASP Processing

The SuperWASP consortium provided the FITS files from the first WASP data release. SuperWASP calculates raw and SYSREM corrected fluxes in units of micro-Vegas, designated FLUX2 and TAMFLUX2 respectively. There are no FLUX1 and TAMFLUX21 values, and the numbering is an artifact of the WASP processing pipeline. SuperWASP also provides the observation times in units of seconds transpired since a Julian reference date. The NASA Exoplanet Archive generated IPAC ASCII table (.tbl) files from the FITS files and added the observation times in HJD_UTC, the fluxes in units of apparent magnitudes, for both the raw and SYSREM corrected fluxes, along with associated errors.

The archive uses the following time conversion formula:

To convert the micro-Vega fluxes, both for the FLUX2 and TAMFLUX2 columns, we use the formula:

and for the associated magnitude errors:

Magnitude Time Series Statistics Calculations

As part of the NASA Exoplanet Archive service, a standard set of time series statistics are performed on the TAMMAG2 magnitude time series, described above. These include the calculation of the mean, median, standard deviations and 5-95 percentile range, and the results are included in the SuperWASP metadata served here.

NOTE: All statistics for time series with only one data point that actually made it into the statistics calculation are null. This affects on order 1% of the data set, or 180,000 records. Of these, 95% have only one data point in the time series. The remainder are filtered down to one data point in the statistics calculation.

Errors During Processing

In the preparation of the IPAC ASCII tbl files, we identified a small number of files with data processing errors. In particular, the following three targets have empty metadata records and their TAMFLUX2 column has been populated with zeros. These files are not included in the archive:

The following two targets had corrupted FITS files and are not included in the archive:

Last updated: 30 January 2019