Catalogues Information


The following catalogues are available through ESASky:

Below there is a brief description of the content of the catalogues. Please note that some catalogues may display rounded or truncated values in ESASky; however, all the original digits are kept when the catalogue tables are downloaded or loaded into a VO application through SAMP.

The catalogue functionality has some known caveats, described here.

 

ASTROMETRIC CATALOGUES

 

GAIA DATA RELEASE 2 (DR2)

The Gaia DR2 catalogue provides positions, parallaxes and proper motions for more than 1.3 billion stars between G-magnitudes 3 and 21, and median radial velocities for more than 7.2 million stars with median G-magnitudes between 4 and 13 and effective temperatures between 3550 and 6900 K. Parallax uncertainties span between 0.04 for G<17 mag and 0.7 mas at G=20. Proper motion uncertainties range from less than 0.06 mas/yr for G<15 mag to 1.2 mas/yr for G=20 mag. The radial velocity precision ranges from 200-300 m/s at the bright end to 1.2 and 2.5 km/s at the faint end for stars of effective temperatures of 4750 and 6500 K, respectively. 

Furthermore, the catalogue provides positions and G-magnitudes for an additional set of more than 361 sources, and BP and RP magnitudes for more than 1.38 billion sources, with precisions between a few milli-mag and around 20 milli-mag.

ESASky displays the following columns from the Gaia DR2 catalogue:

Gaia DR2 catalogue columns displayed on ESASky
Column name Units Description
Name - Gaia Source name
RA (J2015.5)  hh mm ss.ss   Right ascension of source (J2015.5) 
Dec (J2015.5) dd mm ss.s Declination of source (J2015.5)
Parallax mas Parallax of source
Parallax Error mas Parallax error of source
Proper motion in RA mas/yr Proper motion of source in the right ascension direction * COS(declination)
PM in RA Error mas/yr Proper motion error of source in the right ascension direction * COS(declination)
Proper motion in DEC  mas/yr Proper motion of source in the declination direction
PM in DEC Error mas/yr Proper motion error of source in the declination direction
G magnitude mag Gaia mean G-magnitude
G magnitude error mag Gaia mean G-flux over error
BP-RP mag Gaia mean BP-RP colour
Radial velocity km/s Radial velocity of source
Radial velocity error km/s Radial velocity error
Variable flag - Photometric variable flag

 

For a complete description of this data release, refer to the Gaia content and documentation pages. An overview can be found in this page.

 

HIPPARCOS-2 CATALOGUE

The Hipparcos-2 Catalogue is a new reduction of the data from the Hipparcos mission that improved up to a factor of 4 the accuracy of stars with Hp magnitude 8 or lower. It contains positions, parallaxes and proper motions for 118,218 stars. For more information on this catalogue, go to this page or to Vizier.

ESASky displays the following columns from the Hipparcos-2 catalogue:

Hipparcos-2 catalogue columns displayed on ESASky
Column name Units Description
Name - Source name
Right Ascension  hh mm ss.ss  Right ascension of source (J2000)
Declination dd mm ss.s Declination of source (J2000)
Proper motion in RA mas/yr Proper motion of source in the right ascension direction * COS(declination)
Proper motion in DEC  mas/yr Proper motion of source in the declination direction
Parallax mas Parallax of source
Magnitude mag Hipparcos magnitude

 

 

TYCHO-2 CATALOGUE

The Tycho-2 Catalogue is an astrometric reference catalogue containing positions, proper motions and two-colour photometry (B and V) for the 2.5 million brightest stars in the sky. The catalogue is based on observations made using the Hipparcos satellite star mapper and is constructed using the same observations that were used to create the original Tycho catalogue. Improved reduction techniques have resulted in a catalogue with significantly more entries and in improved precision. More information on the Tycho-2 catalogue can be found here and in Vizier.

ESASky displays the following columns from the Tycho-2 catalogue:

Tycho-2 catalogue columns displayed on ESASky
Column name Units Description
Name - Source name
Right Ascension  hh mm ss.ss  Right ascension of source (J2000)
Declination dd mm ss.s Declination of source (J2000)
Proper motion in RA mas/yr Proper motion of source in the right ascension direction * COS(declination)
Proper motion in DEC  mas/yr Proper motion of source in the declination direction
BT magnitude mag Tycho-2 B magnitude
VT magnitude mag Tycho-2 V magnitude

 

 

FOURTH integral IBIS/IGRI SOFT GAMMA-RAY SOURCE catalog

The IBIS/ISGRI Soft Gamma-Ray Source Catalog is an all-sky catalog based on INTEGRAL-IBIS observations performed during the first 1000 orbits of the satellite. The catalogue was released in 2009 and updated in 2016. It is constructed from all public good-quality data available from the mission launch in 2002 up to the end of 2010, and it includes 939 sources significantly detected in the 17-100 keV energy band, of which 120 are previously undiscovered soft gamma-ray emitters. For more information on this catalogue, read the above references, or go to Vizier.

ESASky displays the following columns of this catalogue:

IBIS/ISGRI Catalogue columns displayed on ESASky
Column name Units Description
Name - Source name
Right ascension     hh mm ss.ss   Right ascension of source (J2000)
Declination dd mm ss.s Declination of source (J2000)
Flux20-40 keV mCrab Flux in the 20-40 keV band
Flux40-100 keV mCrab Flux in the 40-100 keV band
Type - Object type
Significance - Maximum significance in a single map
Exposure ksec Exposure time in kiloseconds

 

 

xmm-newton catalogues

The following catalogues from the XMM-Newton mission are included in ESASky: 3XMM-DR7XMMSL1.6, XMM-SUSS2.1.

THE XMM-NEWTON SERENDIPITOUS SOURCE CATALOGUE (3XMM-DR8)

The 3XMM-DR8 catalogue contains source detections drawn from 10,242 XMM-Newton EPIC observations, covering an energy interval from 0.2 keV to 12 keV. More information on this catalogue can be found on the above reference or in this page. Presently, only sources with QUALITY flag equals 0 or 1 (sources "good" or "with suspect parameters") are displayed in ESASky.

3XMM-DR8 characteristics
Number of observations 10,242
Number of 'clean' observations 6,496
Sky coverage 1089 sq.deg
Number of detections 775,153
Number of 'clean' detections (quality flag < 3) 633,733
Number of unique sources 531,454
Number of 'cleanest' extended detections (quality flag = 0, not in high background fields) 12,256
Number of detections with spectra 173,277
Number of detections with time series 173,208
Number of detections with probable constant time series (P <  1  × 10-5) 5,934

 

ESASky displays the following columns of the 3XMM-DR8 catalogue:

3XMM-DR8 columns displayed on ESASky
Column name Units Description
Name - Name of source
Right ascension   hh mm ss.ss  Right ascension of source (J2000)
Declination dd mm ss.s Declination of source (J2000)
Flux erg·cm-2·s-1 Mean total flux
Flux Error erg·cm-2·s-1 Flux error

 

Also provided is a preview of the observation where each source was detected. The name of the source is linked to a XSA results page with all detections of this source.

 

THE XMM-NEWTON CATALOGUE OF SERENDIPITIOUS SOURCES FROM STACKED OBSERVATIONS (3XMM-DR7S)

The 3XMM-DR7s catalogue is the first XMM-Newton catalogue made from stacking individual observations. ​It has been compiled from 1789 overlapping good-quality observations, covering a total sky area of about 150 square degrees. The catalogue contains 216,393 detections contributing to the 71,951 unique sources. For more details, go to the paper above or to this page.

 

3XMM-DR7s characteristics
Number of stacks 434
Number of 'observations 1789
Approximated sky coverage  150 sq.deg
Approximated multiply observed sky area 100 sq.deg
Number of sources 71,951
Number of sources with several contributing observations 57,665
Number of sources with flag 0 or 1 69,526
Number of sources with detection likelihood >10 53,492
Number of extended sources (radius >=6'') 3,346

 

ESASky displays the following columns of the 3XMM-DR7s catalogue:

3XMM-DR7s columns displayed on ESASky
Column name Units Description
Name - Name of source
IAU Name IAU name of source
RA hh mm ss.ss Right ascension of source (J2000)
Dec dd mm ss.s Declination of source (J2000)
Flux erg·cm-2·s-1 Mean total flux
Flux Error erg·cm-2·s-1 Flux error
N. Contrib. - Number of observations in which the source was fitted
N. Obs. - Number of observations involved in the stack
Start time MJD Date of the start of the observation
EP Ontime s Total good exposure time at the central position of the source
Extent arcsec Source extent radius
Extent err arcsec Error in the source extent radius
Flux var. - Largest difference between fluxes (in terms of sigma)

 

XMM SLEW CATALOGue 1.6

XMMSL1 is the first catalogue of X-ray sources detected in XMM-Newton slew data, and has been constructed by members of the XMM-Newton SOC and the EPIC consortium on behalf of ESA. After correcting for overlaps, the Slew Survey covered 65% of the sky.

The current release is made of two catalogues: a full catalogue containing sources with a detection likelihood DET_ML > 8, and a 'clean' catalogue where all known bad sources have been removed and where the detection limit has been raised to DET_ML > 10 (DET_ML>14 for sources found in images with a higher than usual background). The sky coverage of the full catalogue (with overlaps) is 47,350 deg2, and that of the clean catalogue, 35,350 deg2 down to DET_ML > 10 and 12,000 down to DET_ML > 14.

Number of sources in XMMSL1.6
Band Energy  Full catalogue Clean catalogue
0 0.2-12 keV 30,808 17,345
4 2-12 keV 6,306 2,160
5 0.2-2 keV 20,136 14,371
All - 37,929 20,164

 

All sources have been cross-correlated with existing astronomical catalogues (in particular, with the ROSAT All Sky Survey), and positive identifications have been included in the catalogue, together with the source category (e.g. galaxy, flare star etc.). See this page for more details on the XMMSL1.6.

The columns from this catalogue displayed in ESASky are the following:

XMMSL1.6 columns displayed on ESASky
Column name Units Description
Name - Name of source
Right ascension   hh mm ss.ss Right ascension of source (J2000)
Declination dd mm ss.s Declination of source (J2000)
Flux (0.2-12kev) erg·cm-2·s-1 Flux in the 0.2-12 keV band
Flux Error (0.2-12kev) erg·cm-2·s-1 Flux error in the 0.2-12 keV band
Flux (2-12kev) erg·cm-2·s-1 Flux in the 2-12 keV band
Flux Error (2-12kev) erg·cm-2·s-1 Fluxerror in the 2-12 keV band
Flux (0.2-2kev) erg·cm-2·s-1this​ Flux in the 0.2-2 keV band
Flux Error (0.2-2kev) erg·cm-2·s-1 Flux error in the 0.2-2 keV band

 

 

XMM-OM serendipitous ultraviolet source survey CATALOGue (XMM-suss2.1)

The SUSS2.1 catalogue is a catalogue of sources serendipitously detected by the Optical Monitor (OM) on board the XMM-Newton observatory. It provides source positions, magnitudes and fluxes in six broad-band ultraviolet and optical filters for more than 5 million sources, as well as profile diagnostics and variability statistics. 

SUSS2.1 characteristics
Number of observations 7,170
Number of entries 6,246,432
Number of unique sources 4,329,363
Number of sources with repeated observations 831,582

 

The data were processed in January 2014 and January 2015 (observations performed in 2013) at the European Space Astronomy Centre (ESAC, Madrid, Spain) and at Mullard Space Science Laboratory (MSSL, UCL, London, U.K.) by using the XMM Science Analysis Software (SAS) system version 14.0. For more details on this release of the catalogue, go to this page.

These are the columns from the SUSS2.1 catalogue displayed in ESASky:

SUSS2.1 columns displayed on ESASky
Column name Units Description
Name - Name of source
Observation ID - Observation ID number
Right ascension   hh mm ss.ss  Right ascension of source (J2000)
Declination  dd mm ss.s Declination of source (J2000)
DPos - The statistical error on the source position as returned by the source detection software.
UVW1 Flux erg·cm-2·s-1 Flux in the UVW1 band
UVW2 Flux erg·cm-2·s-1 Flux in the UVW2 band
UVM2 Flux erg·cm-2·s-1 Flux in the UVM2 band
U Flux erg·cm-2·s-1 Flux in the U band
V Flux erg·cm-2·s-1 Flux in the V band
B Flux erg·cm-2·s-1 Flux in the B band

 

 

Hubble Source Catalog (HSC)

The Hubble Source Catalog is a combination of all the visit-based source lists in the Hubble Legacy Archive (HLA) into a single catalogue. It contains about 80 million detections of 30 million objects, involving 112 different detector/filter combinations, and about 160,000 HST exposures. Source lists from the Data Release 8 of the Hubble Legacy Archive (HLA) are matched using an algorithm developed by Budávari & Ludow (2012). The mean photometric accuracy is better than 0.10 mag, with relative accuracies as good as 0.02 in certain cases. The relative astrometric residuals are typically within 10 mas, and the absolute astrometric accuracy is better than about 0.1 arcsec for most sources.

HSC data provenance
Instrument Number of filters Number of sources Number of detections Retrieval date
WFPC2 38 29,146 13 × 106 2009/05/11
ACS/WFC 12 9,021 21 × 106 2011/02/16
WFC3/UVIS 47 4,772 31 × 106 2014/06/01
WFC3/IR 15 6,763 14 × 106 2014/06/01
All 112 49,702 79 × 106 -

 

Version 2 includes (see here for more details):

  • Four additional years of ACS source lists (i.e., through June 9, 2015). All ACS source lists go deeper than in version 1. See current HLA holdings for details.
  • One additional year of WFC3 source lists (i.e., through June 9, 2015).
  • Cross-matching between HSC sources and spectroscopic COS, FOS, and GHRS observations.

ESASky displays the following columns from the Hubble Source Catalog:

HSC columns displayed on ESASky
Column name Units Description
Match ID - The HSC match ID number. Details here
Target Name - Source name
# Images - Number of available HST images for source
Right Ascension    hh mm ss.ss  Right ascension of source (J2000)
Declination dd mm ss.s Declination of source (J2000)
Filters - All filters corresponding to the Match ID and # images, separated with a comma. 
Magnitude mag All magnitudes for each filter in the previous column, separated with a comma. The first magnitude corresponds to the first filter, the second magnitude corresponds to the second filter, and so on.
Magnitude error mag All magnitude errors, separated with a comma.

 

Note: There is a small positional offset (< 1") between the source coordinates from the HSC and their location on the HST HiPS maps. This is due to the fact that the HST HiPS were generated from HST data products, while the HSC was created from HLA data products, and there is a discrepancy between the astrometric solutions from both samples. An improved sample of HST HiPS will be produced soon.

See the Caveats page for caveats on the HSC.

 

 

HERSCHEL CATALOGUES

ESASky provides access to the following catalogues from the Herschel mission: the Herschel-PACS Point Source Catalogue (HPPSC) and the Herschel-SPIRE Point Source Catalogue (HSPSC)

 

HERSCHEL-PACS POINT SOURCE CATALOGUE (HPPSC)

The Herschel-PACS Point Source Catalogue (HPPSC), released on 17th May 2017, contains about half million entries distributed over the three bands of the Photodetector Array Camera and Spectrometer (PACS) onboard Herschel, which mapped ~8% of the far-infrared sky. The broad-band filters were centred at 70, 100 and 160 μm, allowing an angular resolution of 5.6ʺ, 6.8ʺ and 11.3ʺ, respectively. 

The catalogue consists of three tables, one per each of these bands. The table below summarises the columns from each table that are displayed in ESASky.

HPPSC columns displayed on ESASky
Column name Units Description
Name - Name of source
Right Ascension   hh mm ss.ss  Right ascension of source (J2000)
Declination dd mm ss.s Declination of source (J2000)
Flux mJy Flux density
ΔFlux mJy Flux density error
FWHM_x Fit arcsec FWHM in x direction
FWHM_y Fit arcsec FWHM in y direction
S/N_S - Structure noise-based signal-to-noise ratio
S/N_R - Flux-based signal-to-noise ratio 
elong flag - Elongation flag (0=circular)
edge flag - Edge flag (True/False)
blend flag - Blend flag (0=not blended)
warmat - Affected by warm attitude (True/False)
ssomap flag - Solar System Map flag (True/False)
Observation ID - First Observation ID from the list of observations that built the map  

  

For details on the HPPSC, and to get the full catalogues, go to this page.

 

HERSCHEL-SPIRE POINT SOURCE CATALOGUE (HSPSC)

The SPIRE Point Source Catalogue (SPSC) was released on 7th February 2017 jointly by the NASA Herschel Science Center and the ESA Herschel Science Centre. It contains more than 1.6 million entries extracted from a total 6878 observations in the sub-millimetre range made by the Spectral and Photometric Imaging Receiver (SPIRE) onboard Herschel. 

The catalogue consists of three tables, one per each of the three SPIRE photometric bands, centred at 250, 350 and 500 microns (1199, 857 and 600 GHz, respectively). The table below summarises the columns from these three subcatalogues that are displayed in ESASky. 

HSPSC columns displayed on ESASky
Column name Units Description
Name - Name of source
Right Ascension   hh mm ss.ss  Right ascension of source (J2000)
Declination dd mm ss.s Declination of source (J2000)
SNR - Signal-to-noise ratio
Flux mJy TML flux density 
ΔFlux  mJy Propagated weighted error in the TML flux density
FluxDao mJy Daophot flux density 
ΔFluxDao mJy Propagated weighted error in the Daophot flux density
FluxTM2 mJy TM2 flux density 
ΔFluxTM2 mJy Propagated weighted error in the TM2 flux density
pntsrc flag - Point source flag
extsrc flag - Extended source flag
lowfwhm flag - Low FWHM flag
largegal flag - Large galaxy flag
mapedge flag - Map edge flag
ssocont flag - SSO contaminator flag

 

For details on the different flux density measurements provided by the catalogue, refer to the Explanatory Supplement. To access the full SPSC catalogue and its Explanatory Supplement, go to this page.  

 

 

planck catalogues

ESASky provides access to the following catalogues from the Planck mission: PCCS2, Planck SZ2, PGCC

For a full description of the catalogues, go to this page or to the reference papers cited below.

 

second PLANCK CATALOGue OF COMPACT SOURCES (PCCS2)

The PCCS2 is a set of single-frequency source catalogues extracted from the Planck full-mission maps in intensity and polarization. These maps contain 48 months of data for the LFI channels, and 29 months of data for the HFI channels,  therefore the flux densities derived from these maps are an average of the source emission over these two periods of time. For the channels 30-353 GHz, the catalogues also contain polarization flux densities and polarization angles for sources with a significance in polarization >99.99%.

The catalogue at 100 Ghz and above has been divided into two subcatalogues: the PCCS2, including all reliable detections (>80%), and PCCS2E, including sources located in sky regions where it was not possible to estimate their reliability.

PCCS2 characteristics

Channel

Frequency (Ghz)

Wavelength (µm)

30

28.4

10561

44

44.1

6807

70

70.4

4260

100

100.0

3000

143

143.0

2098

217

217.0

13.82

353

353.0

850

545

545.0

550

857

857.0

350

Number of sources 1,560 934 1,296 1,742 2,160 2,135 1,344 1,694 4,891
Number of significantly polarized sources 122 30 34 20 25 11 1 - -
Minimum polarized flux density (mJy) 117 181 284 138 148 166 453 - -
Polarized flux density uncertainty (mJy) 46 88 91 30 26 30 81 - -

 

PCCS2E characteristics

Channel

Frequency (Ghz)

Wavelength (µm)

30

28.4

10561

44

44.1

6807

70

70.4

4260

100

100.0

3000

143

143.0

2098

217

217.0

13.82

353

353.0

850

545

545.0

550

857

857.0

350

Number of sources - - - 2,487 4,139 16,842 22,665 31,068 43,290
Number of significantly polarized sources - - - 43 111 325 666 - -
Minimum polarized flux density (mJy) - - - 121 87 114 348 - -
Polarized flux density uncertainty (mJy) - - - 52 44 55 178 - -

 

The following table summarises the columns from the catalogues displayed in ESASky:

PCCS2 columns displayed on ESASky
Column name Units Description
Name - Name of source
Right ascension    hh mm ss.ss   Right ascension of source (J2000)
Declination dd mm ss.s Declination of source (J2000)
Frequency GHz  Planck Frequency
Flux density mJy Channel flux density
Flux density error  mJy Error in channel flux density
Extended Source Flag - Extended source flag, 0 if the source is compact and 1 if the source is extended.
Cat. Reliability - The highest reliability catalogue to which the source belongs. As the full catalogue reliability is >=80%, this is the lowest possible value in this column.

 

 

SECOND planck sunyaev-zeldovitch catalogue (Psz2)

The Planck SZ catalogue is a nearly all-sky list of SZ detections obtained from the Planck data, derived from the HFI frequency channel maps after masking and filling the bright point sources (SNR>10) from the PCCS catalogues in those channels. It contains 1653 detection, of which 1203 are confirmed clusters with identified counterparts in external datasets.

The catalogue was constructed using three detection pipelines: two implementations of the matched multi-filter algorithm (MMF1 and MMF2) and a Bayesian algorithm called PowellSnakes (PwS). A union catalogue was constructed from the detections of all three pipelines. To avoid spurious detections due to foreground sources, a mask to remove Galactic dust, nearby galaxies and point sources was applied after the merging, leaving 83.7% of the sky.

The union catalogue contains the coordinates of a detection, its signal-to-noise ratio, an estimate of the total integrated Comptomization parameter Y and its uncertainty, as well as information on the generation and validation. If available, external identification of a cluster and its redshift is also provided. When more than one pipeline makes the same detection, the information is taken from the most significant detection. If the redshift is known, the SZ mass from the reference pipeline is provided.

The table below shows the columns from this catalogue displayed in ESASky:

PSZ2 columns displayed on ESASky
Column name Units Description
Name - Source name
Right Ascension   hh mm ss.ss   Right ascension of source (J2000)
Declination dd mm ss.s Declination of source (J2000)
Signal to noise - Signal-to-noise ratio of the detection
Redshift - Redshift of cluster
Sundyaev-Zeldovitch mass  1014 MSun Sundyaev-Zeldovitch mass proxy
Validation - External validation status

 

 

planck catalogUE of galactic cold clumps (PGCC)

The PGCC containes 13,188 Galactic sources and 54 sources located in the Magellanic Clouds, all of them identified as cold sources in Planck data (sources colder than their environment). The sources are extracted from the Planck HFI 857, 545 and 353 GHz maps and the 3 THz IRIS map. A detection requires SNR > 4 in pixels in all Planck bands and a minimum angular distance of 5 arcmin to other detections.

The derived physical properties of the PGCC sources are: temperature, column density, physical size, mass, density, and luminosity. The sources span a temperature range from 5.8 to 20 K, and a variety of physical properties corresponding to many different types of objects, from dense cold cores to large molecular clouds.

These are the columns from the PGCC catalogue displayed in ESASky:

PGCC columns displayed on ESASky
Column name Units Description
Name - Name of source
Right Ascension   hh mm ss.ss  Right ascension of source (J2000)
Declination dd mm ss.s Declination of source (J2000)
Signal to Noise - Maximum S/N over the 857, 545 and 353 GHz Planck cold residual maps
Major FWHM arcmin FWHM along the major axis of the elliptical Gaussian
Major FWHM error  arcmin Error in the major axis FWHM
Minor FWHM arcmin FWHM along the minor axis of the elliptical Gaussian
Minor FWHM error  arcmin Error in the minor axis FWHM

 

 

CATALOGUES FROM OTHER DATA PROVIDERS

 CHANDRA SOURCE CATALOG (csC1.1)

 

The Chandra Source Catalog (CSC) contains positions and fluxes detected in public imaging observations by the ACIS and HRC instruments onboard the Chandra X-ray Observatory. Currently the catalogue includes only point sources and compact sources with observed spatial extension smaller than about 30 arcseconds.

In addition to the instrument fluxes, the full catalogue includes derived spatial, spectral and temporal calibrated source properties, as well as associated data products for each source (images, photon event lists, light curves, spectra...), that can be retrieved, together with the full list of parameters available in the full catalog for each source, using CSCview ( http://cda.cfa.harvard.edu/cscview/ ). For more information on the CSC go to this page (http://cxc.cfa.harvard.edu/csc/ ).

CSC1.1 columns displayed on ESASky
Column name Units Description
Name - Name of source
Right ascension   hh mm ss.ss Right ascension of source (J2000)
Declination dd mm ss.s Declination of source (J2000)
Semi-major axis of error ellipse arcsec Three of the parameters specifying the geometry of each error ellipse are the semi-major and semi-minor radii (/err_ellipse_r0/, /err_ellipse_r1/), and the position angle θ that the major axis of the ellipse makes with respect to the tangent plane /y/ axis (/err_ellipse_ang/). This column shows /err_ellipse_r0/.
Confusion flag - Confusion flag, 0=false, 1=true. If true, the source is confused with one or more nearby sources - properties are unreliable.
Saturation flag - Saturation flag, 0=false, 1=true. If true, the source is saturated in all observations - properties are unreliable.
Source flux significance (highest) - Highest flux-based signal-to-noise in the source region aperture across all detections
Flux ACIS erg·cm-2·s-1 ACIS broad band (0.5-7.0 keV) model-independent energy flux in the source region aperture (column also called flux_aper_b)
Lower Flux ACIS erg·cm-2·s-1 Lower 1 sigma (68.2%) Flux ACIS confidence limit (column also called flux_aper_lolim_b)
Upper Flux ACIS erg·cm-2·s-1 Upper 1 sigma (68.2%) Flux ACIS confidence limit (column also called flux_aper_hilim_b)
Flux HRC erg·cm-2·s-1 HRC wide band (~0.1-10.0 keV) model-independent energy flux in the source region aperture (column also called flux_aper_w)
Lower Flux HRC erg·cm-2·s-1 Lower 1 sigma (68.2%) Flux HRC confidence limit (column also called flux_aper_lolim_w)
Upper Flux HRC erg·cm-2·s-1 Upper 1 sigma (68.2%) Flux HRC confidence limit (column also called flux_aper_hilim_w)

 

 

 2MASS All-sky catalog of point sources

The Two-Micron All Sky Survey (2MASS) covered 99.998% of the sky in three near-infrared bands, J, H and Ks. The 2MASS Point Source Catalog (PSC) contains positional and photometric information for 470,992,970 point sources. Sources in this catalogue are detected in at least one band with S/N higher than 7, or in all three bands with S/N higher than 5. In addition, the source position must fulfil some conditions to ensure it is not a spurious detection or there is confusion between sources.

The table below shows the columns of the 2MASS catalogue displayed in ESASky:

2MASS catalogue columns displayed on ESASky
Column name Units Description
Name - Name of source
RA (J2000)   hh mm ss.ss  Right ascension of source (J2000)
DEC (J2000) dd mm ss.s Declination of source (J2000)
J mag mag J-band magnitude
ΔJ mag mag Error in J-band magnitude
H mag mag H-band magnitude
ΔH mag mag Error in H-band magnitude
Ks mag mag Ks-band magnitude
ΔKs mag mag Error in Ks-band magnitude

 

See the IPAC 2MASS documentation for more details on this catalogue.

 

 AllWISE SOURCE catalog

The AllWISE Source Catalog provides astrometry and mid-infrared photometry in four bands (3.4, 4.6, 12 and 22 microns) for 747,634,026 objects detected on the deep AllWISE Atlas Intensity Images. It improves the photometry of discrete sources in all four bands with respect to the WISE Catalog. In addition, improved source variability metrics have been computed. Astrometry has also been improved thanks to the correction of the proper motion of the reference 2MASS stars for the 11 years between the two surveys.

The table below shows the columns of the 2MASS catalogue displayed in ESASky:

AllWISE catalogue columns displayed on ESASky
Column name Units Description
Name - Name of source
RA (J2000)   hh mm ss.ss  Right ascension of source (J2000)
Dec (J2000) dd mm ss.s Declination of source (J2000)
ΔRA arcsec Error in right ascension
ΔDec arcsec Error in declination
W1 mag mag W1-band magnitude
ΔW1 mag mag Error in W1-band magnitude
W2 mag mag W2-band magnitude
ΔW2 mag mag Error in W2-band magnitude
W3 mag mag W3-band magnitude
ΔW3 mag mag Error in W3-band magnitude
W3 mag mag W3-band magnitude
ΔW4 mag mag Error in W4-band magnitude

 

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