Interactive Table Data Definitions for KOI Positional Probabilities

The following table lists all of the data columns in the KOI Positional Probabilities interactive table. More information is provided on the Kepler Occurrence Rate Products page.

Skip to a section:

Identification Columns

Database
Column Name		 Table Label Description
kepid†
KOI Host Star KIC ID		 The Kepler Input Catalog number of the target star hosting this KOI.
kepoi_name† KOI Name The Kepler Object of Interest Name.
pp_koi_period KOI Transit Period [days] The orbital period for this KOI used in the relative probability computation.
pp_koi_time0bk KOI Transit Epoch [BKJD=BJD-2454833] The orbital epoch in BKJD for this KOI used in the probability computation.
pp_koi_depth KOI Transit Depth [ppm] The observed KOI transit depth in parts per million used in the probability computation.
† Default column: these columns display in the interactive table when the table is first loaded, and when Reset Filters is clicked.

Host Star Probabilities

Database
Column Name		 Table Label Description
pp_host_rel_prob† Host Star Relative Probability The relative probability that the KOI is due to a transit event at the same location as the host star.
pp_host_prior_prob Host Star a Priori Background Probability The a priori probability that the transit is due to the KOI host star, to be used in a statistical sense when the relative probability computation has failed and no position information is available. See Section 5.2 of Planet Reliability Metrics: Astrophysical Positional Probabilities (KSCI-19092).
pp_host_prob_prov KOI Host Star Relative Probability Source Flag

A text string indicating indicating the source of the KOI host star relative probability value. Current values flags include:

  • PROB: value is computed using the positional relative probability algorithm described in KSCI-19092

  • MATCH: value is set to zero because this KOI is the child of a known period-epoch match and the parent is not among known stars in this KOI's pixels

  • FPWG: value is set to zero because the relative probability computation failed and this KOI has been determined not to be due to the target star by the false positive working group

  • FAILED: value is set to NULL because the relative probability computation failed and there is not a period-epoch match and the false positive working group has not certified that there is an offset
pp_host_prob_score† Host Star Probability Usability Score A value from 0 to 1 indicating whether the probability computation is trustworthy, with 1 indicating completely trustworthy. A value below 0.3 indicates that the relative probability computation is likely untrustworthy. See Section 5.1 of Planet Reliability Metrics: Astrophysical Positional Probabilities (KSCI-19092).
† Default column: these columns display in the interactive table when the table is first loaded, and when Reset Filters is clicked.

Highest-Probability Star

Database
Column Name		 Table Label Description
pp_1hi_starid† Highest-Probability Star ID

The identifier of the star with the highest relative probability of being in the same location as the transit signal.
pp_1hi_ra Highest-Probability Star RA [decimal degrees] Right ascension in degrees of the star with the highest relative probability.
pp_1hi_dec Highest-Probability Star Dec [decimal degrees] Declination in degrees of the star with the highest relative probability.
pp_1hi_kepmag Highest-Probability Star Kepler-band Magnitude Kepler magnitude of the star with the highest relative probability.
pp_1hi_rel_prob† Highest-Probability Star Relative Probability The relative probability that the KOI is due to a transit event at the same location as this star.
pp_1hi_mod_depth Highest-Probability Star Modeled Transit Depth [ppm]

The modeled transit depth assuming that the KOI is due to a transit on this star. This value is strongly sensitive to catalog error, so stars with modeled depths up to 3 million parts per million are considered in the relative probability computation.
pp_1hi_prob_prov Highest-Probability Star Provenance Flag The source of the position and magnitude data for this star.
† Default column: these columns display in the interactive table when the table is first loaded, and when Reset Filters is clicked.

Second-Highest Probability Star

Database
Column Name		 Table Label Description
pp_2hi_starid† Second-Highest Probability Star ID The identifier of the star with the second highest relative probability of being in the same location as the transit signal.
pp_2hi_ra Second-Highest Probability Star RA [decimal degrees] Right ascension in degrees of the star with the second highest relative probability.
pp_2hi_dec Second-Highest Probability Star Dec [decimal degrees] Declination in degrees of the star with the second highest relative probability.
pp_2hi_kepmag Second-Highest Probability Star Kepler-Band Magnitude Kepler magnitude of the star with the second highest relative probability.
pp_2hi_rel_prob† Second-Highest Probability Star Relative Probability The relative probability that the KOI is due to a transit event at the same location as this star.
pp_2hi_mod_depth Second-highest Probability Star Modeled Transit Depth The modeled transit depth assuming that the KOI is due to a transit on this star. This value is strongly sensitive to catalog error, so stars with modeled depths up to 3 million parts per million are considered in the relative probability computation.
pp_2hi_prob_prov Second highest probability star provenance flag The source of the position and magnitude data for this star.
† Default column: these columns display in the interactive table when the table is first loaded, and when Reset Filters is clicked.

Background Information

Database
Column Name		 Table Label Description
pp_unk_rel_prob† Relative probability due to unknown background source Relative probability that the transit signal is due to an unknown background source. See Section 4.2 of Planet Reliability Metrics: Astrophysical Positional Probabilities (KSCI-19092).
pp_bkgd_density Local background source density The background source density used in the probability computation.
† Default column: these columns display in the interactive table when the table is first loaded, and when Reset Filters is clicked.


Last updated: 4 November 2015