Variable Sources: Spurious Signals (gaiadr3.vari_spurious_signals)

The table has 11754303 rows, 38 columns.

Description

Several statistics computed for all sources with published photometric time series which can help in the identification of sources that are affected by calibration issues resulting in, for example, spurious variability signals.

The table has a row for every source with {\tt GaiaSource.hasEpochPhotometry} set to TRUE and is described in detail in \cite{DR3-DPACP-164}.

Attribution

If you have used Gaia data in your research, please use the following acknowledgement:

This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement.

More information can be found on the credit and citation instructions page.

Columns

Name Type UCD Unit Description
source_id long meta.id
meta.main

Source Identifier
phot_variable_flag char meta.code
src.var

Photometric variability flag
in_andromeda_survey boolean meta.code.status

Flag indicating that the source is present in the Gaia Andromeda Photometric Survey (GAPS)
num_obs_common_all_bands short meta.number

Number of observations in common for G, BP and RP bands, used in computation of the Spearman correlation excess factor fields
num_obs_g_fov short meta.number

Number of selected observations of G FoV transits, used in the frequency fields
gls_freq_g_fov double stat.value d**-1

Frequency identified by Generalised Least Squares period search on G FoV timeseries
gls_freq_ampl_g_fov float stat.value

Normalised amplitude of the frequency identified by Generalised Least Squares period search on G FoV timeseries
gls_freq_sde_g_fov float stat.snr

Signal Detection Efficiency (SDE) of the frequency identified by Generalised Least Squares period search on G FoV timeseries
gls_freq_fap_g_fov double stat.probability

False Alarm Probability (FAP) of the frequency identified by Generalised Least Squares period search on G FoV timeseries
nhm_fund_freq_g_fov double stat.value d**-1

Fundamental frequency identified by non-linear harmonic modelling on G FoV timeseries, initialised by the Generalised Least Squares frequency
nhm_fund_freq_error_g_fov float stat.error d**-1

Uncertainty of the fundamental frequency identified by non-linear harmonic modelling on G FoV timeseries
spearman_corr_exf_g_fov float stat.correlation

G-band FoV photometry Spearman correlation with corrected flux excess factor
num_obs_excl_epsl_g_fov short meta.number

Number of G-band FoV photometry observations excluding EPSL, used for the IPD correlation and scan angle modelling in the G band
spearman_corr_ipd_g_fov float stat.correlation

G-band FoV photometry Spearman correlation with IPD model
scan_angle_model_offset_g_fov float stat.fit.param mag

Magnitude offset of the scan angle model fit to G-band FoV photometry
scan_angle_model_ampl_g_fov float stat.fit.param mag

Amplitude of the scan angle model fit to G-band FoV photometry
scan_angle_model_ampl_sig_g_fov float stat.fit.goodness

Significance of the amplitude of the scan angle model fit to G-band FoV photometry
scan_angle_model_phase_g_fov float stat.fit.param deg

Phase of the scan angle model fit to G-band FoV photometry
scan_angle_model_red_chi2_g_fov float stat.fit.goodness

Reduced Chi2 of the scan angle model fit to G-band FoV photometry
scan_angle_model_f2_g_fov float stat.fit.goodness

F2 goodness-of-fit of the scan angle model fit to G-band FoV photometry
spearman_corr_exf_bp float stat.correlation

BP-band photometry Spearman correlation with corrected flux excess factor
num_obs_excl_epsl_bp short meta.number

Number of BP-band photometry observations excluding EPSL, used for the IPD correlation and scan angle modelling in the BP band
spearman_corr_ipd_bp float stat.correlation

BP-band Spearman correlation with IPD model
scan_angle_model_offset_bp float stat.fit.param mag

Magnitude offset of the scan angle model fit to BP-band photometry
scan_angle_model_ampl_bp float stat.fit.param mag

Amplitude of the scan angle model fit to BP-band photometry
scan_angle_model_ampl_sig_bp float stat.fit.goodness

Significance of the amplitude of the scan angle model fit to BP-band photometry
scan_angle_model_phase_bp float stat.fit.param deg

Phase of the scan angle model fit to BP-band photometry
scan_angle_model_red_chi2_bp float stat.fit.goodness

Reduced Chi2 of the scan angle model fit to BP-band photometry
scan_angle_model_f2_bp float stat.fit.goodness

F2 goodness-of-fit of the scan angle model fit to BP-band photometry
spearman_corr_exf_rp float stat.correlation

RP-band photometry Spearman correlation with corrected flux excess factor
num_obs_excl_epsl_rp short meta.number

Number of RP-band photometry observations excluding EPSL, used for the IPD correlation and scan angle modelling in the RP band
spearman_corr_ipd_rp float stat.correlation

RP-band Spearman correlation with IPD model
scan_angle_model_offset_rp float stat.fit.param mag

Magnitude offset of the scan angle model fit to RP-band photometry
scan_angle_model_ampl_rp float stat.fit.param mag

Amplitude of the scan angle model fit to RP-band photometry
scan_angle_model_ampl_sig_rp float stat.fit.goodness

Significance of the amplitude of the scan angle model fit to RP-band photometry
scan_angle_model_phase_rp float stat.fit.param deg

Phase of the scan angle model fit to RP-band photometry
scan_angle_model_red_chi2_rp float stat.fit.goodness

Reduced Chi2 of the scan angle model fit to RP-band photometry
scan_angle_model_f2_rp float stat.fit.goodness

F2 goodness-of-fit of the scan angle model fit to RP-band photometry