Data Columns in the KELT Table
The NASA Exoplanet Archive provides access to KELT time series through a web-based search interface, the Table Access Protocol (TAP) service, and the application programming interface (API). The following table lists all data columns in the KELT Time Series table (kelttimeseries) that can be returned through TAP and API queries.
See the KELT page for more information on the KELT data products available at the NASA Exoplanet Archive.
Digital Object Identifier
If you use archive data or services for your research, please include the following Digital Object Identifier (DOI) as part of your acknowledgment:
DOI 10.26133/NEA8
See Acknowledging the Archive for dataset-specific language. See the full list of NASA Exoplanet Archive DOIs for other data sets and services.
If you have questions about the structure or use of this table in the archive format, submit a Helpdesk ticket.
Target Labels and Flags
| Database Column Name | Table Label | Description |
|---|---|---|
| kelt_sourceid† | Source ID | KELT Object Identification |
| kelt_field† | Survey Field | KELT field of observation. Fields available are N02, N04, N06, N08, N10 and N12 |
| kelt_orientation† | Field Orientation | KELT field orientation; either "east" or "west." |
| proc_type† | Processing | KELT timeseries processing; either "raw" or "tfa." |
| ra† | RA [decimal degrees] | Right Ascension of the target in decimal degrees |
| dec† | Dec [decimal degrees] | Declination of the target in decimal degrees |
| bjdstart† | Start BJD [days] | Date of first point in light curve Barycentric Julian Date. For N02, timestamps are in approximate BJD where the correction for the field center to edge difference has not been applied. This correction has a maximum value of 30 seconds, but is typically of order 1-5 seconds. For N04, the timestamps are JD_TT, not BJD. |
| bjdstop† | End BJD [days] | Date of last point in light curve in Barycentric Julian Date. For N02, timestamps are in approximate BJD where the correction for the field center to edge difference has not been applied. This correction has a maximum value of 30 seconds, but is typically of order 1-5 seconds. For N04, the timestamps are JD_TT, not BJD. |
| obsstart | Calendar Start Time | Calendar Date time-stamp of first point in light curve |
| obsstop | Calendar End Time | Calendar Date time-stamp of last point in light curve |
| kelt_mag† | Magnitude [mag] | Instrumental KELT magnitude |
| npts† | Points in Statistics Calculation | Number of points used in statistics |
| minvalue | Minimum Value of Time Series [mag] | Minimum value of magnitude time series |
| maxvalue | Maximum Value of Time Series [mag] | Maximum value of magnitude time series |
| mean | Mean Value of Time Series [mag] | Mean value of magnitude time series |
| stddevwrtmean | Std Dev of Time Series wrt Mean [mag] | Standard deviation with respect to mean of magnitude time series |
| median† | Median value of Time Series [mag] | Median value of magnitude time series |
| stddevwrtmedian† | Std Dev of Time Series wrt Median [mag] | Standard deviation with respect to median of magnitude time series |
| n5sigma | Number of points > 5 sigma from median | Number of points further than 5 standard deviations from the magnitude time series median |
| f5sigma | Fraction of points > 5 sigma from median | Fraction of points further than 5 standard deviations from the magnitude time series median |
| medabsdev | Median Absolute Deviation of Time Series [mag] | Median absolute deviation of magnitude time series |
| chisquared | Reduced Chi-Squared of Time Series | Reduced chi-squared of the magnitude time series with respect to the median |
| range595† | 5-95% Range of Time Series [mag] | 5-95 percentile range of magnitude time series |
† Default column: these columns display in the interactive table when the table is first loaded, and when Reset Filters is clicked. They are also the default set of columns returned in the API if none are specified. More information about default columns is given in the archive's FAQ.
Last updated: 13 July 2021
