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Data Model: eFEDS_c001_V5_LightCurves_softhard

General Description
Intrinsic X-ray variability of eFEDS sources in the 0.2-2.3 keV (soft) and 2.3-5.0 keV (hard) bands has been determined. Variability tests have been performed using the normalized excess variance, the maximum amplitude variability method as performed for the 2RXS catalogue as well as the Bayesian excess variance and the Bayesian block methods. In total 65 sources have been identified as being significantly variable in the soft band. In the hard band only one source is found to vary significantly. For the most variable sources fits to stellar flare events reveal extreme flare properties. A few highly variable AGN have also been detected. About half of the variable eFEDS sources have been detected at X-rays with eROSITA for the first time.
Filename:
eFEDS_c001_LightCurves_softhard-V5.fits
Approximate Size
7 MB
File Type
FITS
Generated by Product
eSASS (light curve plots created with the MIDAS/EXSAS system and python scripts)

Sections

Content of the page.

HDU1: data_all_eFEDS_variability.tsv

[Write text to summarize contents of this HDU]

HDU Type
BINARY TABLE
HDU Size
7 MB
Header Table Caption for HDU1
KeyValueTypeComment
Binary Table Caption for HDU1
NameTypeUnitDescription
SRCID int16 None Source identification number in eFEDS catalogue
ndata_0 float32 None Number of data point in energy band 0
meancr_0 float64 counts/s Mean count rate in energy band 0
meancr_err_0 float64 counts/s Count rate error of mean count rate in energy band 0
nev_0 float64 None Normalized excess variance value in energy band 0
nev_err_0 float64 None Error of the normalized excess variance value in energy band 0
nev_sig_0 float64 sigma Normalized excess variance in units of sigma in energy band 0
nev_det_0 bool Variability flag of Normalized excess variance in energy band 0: T=true, F=false
ampl_max_0 float64 None Maximum amplitude variability value in energy band 0
ampl_sig_0 float64 sigma Maximum amplitude variability in units of sigma in energy band 0
ampl_det_0 bool None Variability flag of Normalized excess variance in energy band 0: T=true, F=false
nbblocks_0 float32 None Number of Bayesian blocks in energy band 0
bb_det_0 bool None Variability flag of Normalized excess variance in energy band 0: T=true, F=false
bexvar_scatt_0 float32 None Bayesian excess variance value in energy band 0
bexvar_scatt_lo_0 float32 None Bayesian excess variance lower 10 per cent percentile of the posterior in energy band 0
bexvar_det_0 bool None Variability flag of Bayesian excess variance in energy band 0: T=true, F=false
bexvar_scatt_hi_0 float32 None Bayesian excess variance upper 90 per cent percentile of the posterior in energy band 0
bexvar_rate_0 float32 None Bayesian excess variance mean count rate value in energy band 0
bexvar_rate_err_0 float32 None Error of the Bayesian excess variance mean count rate in energy band 0
ndata_1 float32 None Number of data points in energy band 1
meancr_1 float64 counts/s Mean count rate in energy band 1
meancr_err_1 float64 counts/s Count rate error of mean count rate in energy band 1
nev_1 float64 None Normalized excess variance value in energy band 1
nev_err_1 float64 None Error of the normalized excess variance value in energy band 1
nev_sig_1 float64 sigma Normalized excess variance in units of sigma in energy band 1
nev_det_1 bool None Variability flag of Normalized excess variance in energy band 1: T=true, F=false
ampl_max_1 float64 None Maximum amplitude variability value in energy band 1
ampl_sig_1 float64 sigma Maximum amplitude variability in units of sigma in energy band 1
ampl_det_1 bool None Variability flag for Maximum amplitude variability in energy band 1: T=true, F=false
nbblocks_1 float32 None Number of Bayesian blocks in energy band 1
bb_det_1 bool None Variability flag of Bayesian blocks in energy band 1: T=true, F=false
bexvar_scatt_1 float32 None Bayesian excess variance value in energy band 1
bexvar_scatt_lo_1 float32 None Bayesian excess variance lower 10 per cent percentile of the posterior in energy band 1
bexvar_det_1 bool None Variability flag of Bayesian excess variance in energy band 1: T=true, F=false
bexvar_scatt_hi_1 float32 None Bayesian excess variance upper 90 per cent percentile of the posterior in energy band 1
bexvar_rate_1 float32 None Bayesian excess variance mean count rate value in energy band 1
bexvar_rate_err_1 float32 None Error of the Bayesian excess variance mean count rate in energy band 1
ndata_2 float32 None Number of data points in energy band 2
meancr_2 float64 counts/s Mean count rate in energy band 2
meancr_err_2 float64 counts/s Count rate error of mean count rate in energy band 2
nev_2 float64 None Normalized excess variance value in energy band 2
nev_err_2 float64 None Error of the normalized excess variance value in energy band 2
nev_sig_2 float64 sigma Normalized excess variance in units of sigma in energy band 2
nev_det_2 bool None Variability flag of Normalized excess variance in energy band 2: T=true, F=false
ampl_max_2 float64 None Maximum amplitude variability value in energy band 2
ampl_sig_2 float64 sigma Maximum amplitude variability in units of sigma in energy band 2
ampl_det_2 bool None Variability flag for Maximum amplitude variability in energy band 2: T=true, F=false
nbblocks_2 float32 None Number of Bayesian blocks in energy band 2
bb_det_2 bool None Variability flag of Bayesian blocks in energy band 2: T=true, F=false
bexvar_scatt_2 float32 None Bayesian excess variance value in energy band 2
bexvar_scatt_lo_2 float32 None Bayesian excess variance lower 10 per cent percentile of the posterior in energy band 2
bexvar_det_2 bool None Variability flag of Bayesian excess variance in energy band 2: T=true, F=false
bexvar_scatt_hi_2 float32 None Bayesian excess variance upper 90 per cent percentile of the posterior in energy band 2
bexvar_rate_2 float32 None Bayesian excess variance mean count rate value in energy band 2
bexvar_rate_err_2 float32 None Error of the Bayesian excess variance mean count rate in energy band 2
isvariable_0 bool None Has significant variability in one of the four tests in energy band 0: T=true, F=false
isvariable_1 bool None Has significant variability in one of the four tests in energy band 1: T=true, F=false
isvariable_2 bool None Has significant variability in one of the four tests in energy band 2: T=true, F=false
isvariable bool None Has significant variability in one of the energy bands
counts_0_3s bool Unitless Variablity for visual inspection of the cumulative counts in band 1: below 3 sigma=F, above 3 sigma=T
counts_1_3s bool Unitless Variablity for visual inspection of the cumulative counts in band 1: below 3 sigma=F, above 3 sigma=T
counts_2_3s bool Unitless Variablity for visual inspection of the cumulative counts in band 2: below 3 sigma=F, above 3 sigma=T

References

This section is the place to put references of interest.

Predehl et al. 2020. The eROSITA X-ray telescope on SRG

Acknowledgement

The eROSITA data model structure for catalogues was branched from the SDSS data model for value added catalogues.