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	II/321	142666		IPHAS DR2 Source Catalogue (Barentsen+, 2014) ReadMe+ftp 2014yCat.2321....0B Similar Catalogs Post annotation
1.	II/321/iphas2		IPHAS DR2 (218,991,524 sources) (218991524 rows)

Simple Constraint List Of Constraints

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Column

Constraint

Explain (UCD)

IPHAS

(char)

⁽ⁱ⁾ IPHAS name, based on J2000 position (meta.id;meta.main)

RAJ2000

deg

⁽ⁱ⁾ Right ascension (J2000) from r-band (pos.eq.ra;meta.main)

DEJ2000

deg

⁽ⁱ⁾ Declination (J2000) from r-band (pos.eq.dec;meta.main)

sourceID

(char)

⁽ⁿ⁾⁽ⁱ⁾ Unique identification number (meta.id)

posErr

arcsec

RMS residual against 2MASS across the CCD (stat.error)

mergedClass

Image classification flag (Note 1) (meta.code.class)

mergedClassStat

Merge stellarness-of-profile statistic (stat)

pStar

Point source probability (stat.fit.goodness)

pGalaxy

Extended source probability (stat.fit.goodness)

pNoise

Noise source probability (stat.fit.goodness)

rmi

mag

⁽ⁿ⁾ r-i colour (phot.color;em.opt.R;em.opt.I)

ALL cols

⁽ⁿ⁾ indicates a possible blank or NULL column

⁽ⁱ⁾indexed column

rmha

mag

⁽ⁿ⁾ r-Halpha colour (phot.color;em.opt.R;em.line.Halpha)

mag

⁽ⁿ⁾⁽ⁱ⁾ r mag using 2.3 arcsec diameter aperture (Vega scale) (phot.mag;em.opt.R)

rErr

mag

⁽ⁿ⁾ Uncertainty for r (Note 2) (stat.error;phot.mag)

rPeakMag

mag

⁽ⁿ⁾ Alternative r mag derived from the peak pixel height (Vega scale) (phot.mag;em.opt.R)

rPeakMagErr

mag

⁽ⁿ⁾ Uncertainty in rPeakMag (Note 2) (stat.error;phot.mag)

rAperMag1

mag

⁽ⁿ⁾ Alternative r mag using the 1.2 arcsec diameter aperture (Vega scale) (phot.mag)

rAperMag1Err

mag

⁽ⁿ⁾ Uncertainty in rAperMag1 (Note 2) (stat.error;phot.mag)

rAperMag3

mag

⁽ⁿ⁾ Alternative r mag using the 3.3 arcsec diameter aperture (Vega scale) (phot.mag)

rAperMag3Err

mag

⁽ⁿ⁾ Uncertainty in rAperMag3 (Note 2) (stat.error;phot.mag)

rGauSig

pix

⁽ⁿ⁾ RMS of axes of ellipse fit in r-band (stat.error)

rEll

⁽ⁿ⁾ Ellipticity in the r-band (src.ellipticity)

rPA

deg

⁽ⁿ⁾ Position angle in the r-band (pos.posAng)

rClass

Discrete image classification flag (Note 3) (meta.code.class)

ALL cols

⁽ⁿ⁾ indicates a possible blank or NULL column

⁽ⁱ⁾indexed column

rClassStat

⁽ⁿ⁾ N(0,1) stellarness-of-profile statistic (stat)

rDeblend

[0,1] Blend flag for r-band. (meta.code)

rSaturated

[0,1] Saturation flag for r-band (meta.code)

rMJD

⁽ⁿ⁾ Modified Julian Date for the r exposure (time.epoch)

rSeeing

arcsec

⁽ⁿ⁾ Average FWHM in the same CCD frame (phys.angSize)

rDetectionID

(char)

Unique identifier of the r detection (Note 4) (meta.id)

pix

⁽ⁿ⁾ Pixel position in the r-band exposure (pos.cartesian.x;instr.det)

pix

⁽ⁿ⁾ Pixel position in the r-band exposure (pos.cartesian.y;instr.det)

mag

⁽ⁿ⁾⁽ⁱ⁾ i mag using 2.3 arcsec diameter aperture (Vega scale) (phot.mag;em.opt.I)

iErr

mag

⁽ⁿ⁾ Uncertainty for i (Note 2) (stat.error;phot.mag)

iPeakMag

mag

⁽ⁿ⁾ Alternative i mag derived from the peak pixel height (Vega scale) (phot.mag;em.opt.I)

iPeakMagErr

mag

⁽ⁿ⁾ Uncertainty in iPeakMag (Note 2) (stat.error;phot.mag)

iAperMag1

mag

⁽ⁿ⁾ Alternative i mag using the 1.2 arcsec diameter aperture (Vega scale) (phot.mag)

ALL cols

⁽ⁿ⁾ indicates a possible blank or NULL column

⁽ⁱ⁾indexed column

iAperMag1Err

mag

⁽ⁿ⁾ Uncertainty in iAperMag1 (Note 2) (stat.error;phot.mag)

iAperMag3

mag

⁽ⁿ⁾ Alternative i mag using the 3.3 arcsec diameter aperture (Vega scale) (phot.mag)

iAperMag3Err

mag

⁽ⁿ⁾ Uncertainty in iAperMag3 (Note 2) (stat.error;phot.mag)

iGauSig

pix

⁽ⁿ⁾ RMS of axes of ellipse fit in i-band (stat.error)

iEll

⁽ⁿ⁾ Ellipticity in the i-band (src.ellipticity)

iPA

deg

⁽ⁿ⁾ Position angle in the i-band (pos.posAng)

iClass

Discrete image classification flag (Note 3) (meta.code.class)

iClassStat

⁽ⁿ⁾ N(0,1) stellarness-of-profile statistic (stat)

iDeblend

[0,1] Blend flag for i-band. (meta.code)

iSaturated

[0,1] Saturation flag for i-band (meta.code)

iMJD

⁽ⁿ⁾ Modified Julian Date for the i exposure (time.epoch)

iSeeing

arcsec

⁽ⁿ⁾ Average FWHM in the same CCD frame (phys.angSize)

iDetectionID

(char)

Unique identifier of the i detection (Note 4) (meta.id)

ALL cols

⁽ⁿ⁾ indicates a possible blank or NULL column

⁽ⁱ⁾indexed column

pix

⁽ⁿ⁾ Pixel position in the i-band exposure (pos.cartesian.x;instr.det)

pix

⁽ⁿ⁾ Pixel position in the i-band exposure (pos.cartesian.y;instr.det)

iXi

arcsec

⁽ⁿ⁾ offset of the i-band position relative to the ra column (pos.angDistance)

iEta

arcsec

⁽ⁿ⁾ offset of the i-band position relative to the dec column (pos.angDistance)

mag

⁽ⁿ⁾⁽ⁱ⁾ H-alpha mag using 2.3" diameter aperture (Vega scale) (phot.mag)

haErr

mag

⁽ⁿ⁾ Uncertainty for H-alpha (Note 2) (stat.error;phot.mag)

haPeakMag

mag

⁽ⁿ⁾ Alternative H-alpha mag derived from the peak pixel height (Vega scale) (phot.mag)

haPeakMagErr

mag

⁽ⁿ⁾ Uncertainty in haPeakMag (Note 2) (stat.error;phot.mag)

haAperMag1

mag

⁽ⁿ⁾ Alternative H-alpha mag using the 1.2 arcsec diameter aperture (Vega scale) (phot.mag)

haAperMag1Err

mag

⁽ⁿ⁾ Uncertainty in haAperMag1 (Note 2) (stat.error;phot.mag)

haAperMag3

mag

⁽ⁿ⁾ Alternative H-alpha mag using the 3.3 arcsec diameter aperture (Vega scale) (phot.mag)

haAperMag3Err

mag

⁽ⁿ⁾ Uncertainty in iAperMag3 (Note 2) (stat.error;phot.mag)

haGauSig

pix

⁽ⁿ⁾ RMS of axes of ellipse fit in H-alpha (stat.error)

ALL cols

⁽ⁿ⁾ indicates a possible blank or NULL column

⁽ⁱ⁾indexed column

haEll

⁽ⁿ⁾ Ellipticity in H-alpha (src.ellipticity)

haPA

deg

⁽ⁿ⁾ Position angle in H-alpha (pos.posAng;spect.line)

haClass

Discrete image classification flag (Note 3) (meta.code.class)

haClassStat

⁽ⁿ⁾ N(0,1) stellarness-of-profile statistic (stat)

haDeblend

[0,1] Blend flag for H-alpha (meta.code)

haSaturated

[0,1] Saturation flag for H-alpha (meta.code)

haMJD

⁽ⁿ⁾ Modified Julian Date for the Ha exposure (time.epoch)

haSeeing

arcsec

⁽ⁿ⁾ Average FWHM in the same CCD frame (phys.angSize)

haDetectionID

(char)

Unique ID of the H-alpha detection (Note 4) (meta.id)

haX

pix

⁽ⁿ⁾ Pixel position in the H-alpha exposure (pos.cartesian.x;instr.det)

haY

pix

⁽ⁿ⁾ Pixel position in the H-alpha exposure (pos.cartesian.y;instr.det)

haXi

arcsec

⁽ⁿ⁾ offset of the H-alpha position relative to the ra column (pos.angDistance)

haEta

arcsec

⁽ⁿ⁾ offset of the H-alpha position relative to the dec column (pos.angDistance)

ALL cols

⁽ⁿ⁾ indicates a possible blank or NULL column

⁽ⁱ⁾indexed column

brightNeighb

[0,1] Nearby very bright star flag (Note 5) (meta.code)

deblend

[0,1] Blend flag (meta.code)

saturated

[0,1] Saturation flag (meta.code)

nBands

Number of bands for source detection (meta.number)

a10

[0,1] signal-to-noise >10 flag (Note 6) (meta.code)

a10point

[0,1] quality criteria flag (Note 7) (meta.code.qual)

fieldID

(char)

Survey field identifier (meta.id;obs.field)

fieldGrade

(char)

Internal quality control score (meta.code.qual)

night

UT date at the start of the night (time.epoch)

seeing

arcsec

Maximum of rSeeing, iSeeing or HaSeeing (phys.angSize)

ccd

[1-4] CCD chip number (meta.id)

nObs

[1-9] Number of observations of the source (meta.number)

sourceID2

(char)

SourceID of the alternative detection of the object in the partner exposure (meta.id)

fieldID2

(char)

Field identifier of the partner detection (meta.id;instr.saturation;obs.field)

mag

⁽ⁿ⁾ r mag in the dithered partner field (Vega scale) (phot.mag;em.opt.R)

rErr2

mag

⁽ⁿ⁾ Uncertainty for r2 (stat.error;phot.mag)

mag

⁽ⁿ⁾ i mag in the dithered partner field (Vega scale) (phot.mag;em.opt.I)

iErr2

mag

⁽ⁿ⁾ Uncertainty for i2 (stat.error;phot.mag)

ha2

mag

⁽ⁿ⁾ Ha mag in the dithered partner field (Vega scale) (phot.mag)

haErr2

mag

⁽ⁿ⁾ Uncertainty for ha2 (stat.error;phot.mag)

errBits2

⁽ⁿ⁾ Error bitmask for the partner detection (Note 8) (meta.code.qual)

ALL cols

⁽ⁿ⁾ indicates a possible blank or NULL column

⁽ⁱ⁾indexed column

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