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II/321/iphas2 IPHAS DR2 Source Catalogue (Barentsen+, 2014)
IPHAS DR2 (218,991,524 sources) (218991524 rows)
  IPHAS===J194815.78+282908.6
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ColumnValue  Explain   (UCD)
_RAJ200019 48 15.7776 "h:m:s" Right ascension (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEJ2000+28 29 08.628 "d:m:s" Declination (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_RAB195019 46 14.2530 "h:m:s" Right ascension (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEB1950+28 21 36.655 "d:m:s" Declination (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_Glon064.4654711 deg Galactic longitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lon)
_Glat+01.4614386 deg Galactic latitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lat)

IPHASJ194815.78+282908.6  (i) IPHAS name, based on J2000 position (meta.id;meta.main)
RAJ2000297.06574 deg (i) Right ascension (J2000) from r-band (pos.eq.ra;meta.main)
DEJ2000+28.48573 deg (i) Declination (J2000) from r-band (pos.eq.dec;meta.main)
sourceID571007-4-21782  (i) Unique identification number (meta.id)
posErr 0.06 arcsec RMS residual against 2MASS across the CCD (stat.error)
mergedClass 1  Image classification flag (Note 1)   (meta.code.class)
mergedClassStat 67.45  Merge stellarness-of-profile statistic (stat)
pStar 0.00  Point source probability (stat.fit.goodness)
pGalaxy 1.00  Extended source probability (stat.fit.goodness)
pNoise 0.00  Noise source probability (stat.fit.goodness)
rmi 1.11 mag r-i colour (phot.color;em.opt.R;em.opt.I)
rmha 0.42 mag r-Halpha colour (phot.color;em.opt.R;em.line.Halpha)
r18.16 mag (i) r mag using 2.3 arcsec diameter aperture (Vega scale) (phot.mag;em.opt.R)
rErr 0.01 mag Uncertainty for r (Note 2)   (stat.error;phot.mag)
rPeakMag18.15 mag Alternative r mag derived from the peak pixel height (Vega scale) (phot.mag;em.opt.R)
rPeakMagErr 0.02 mag Uncertainty in rPeakMag (Note 2)   (stat.error;phot.mag)
rAperMag118.14 mag Alternative r mag using the 1.2 arcsec diameter aperture (Vega scale) (phot.mag)
rAperMag1Err 0.01 mag Uncertainty in rAperMag1 (Note 2)   (stat.error;phot.mag)
rAperMag318.28 mag Alternative r mag using the 3.3 arcsec diameter aperture (Vega scale) (phot.mag)
rAperMag3Err 0.016 mag Uncertainty in rAperMag3 (Note 2)   (stat.error;phot.mag)
rGauSig 1.07 pix RMS of axes of ellipse fit in r-band (stat.error)
rEll 0.13   Ellipticity in the r-band (src.ellipticity)
rPA101.76 deg Position angle in the r-band (pos.posAng)
rClass 1  Discrete image classification flag (Note 3)   (meta.code.class)
rClassStat 36.72   N(0,1) stellarness-of-profile statistic (stat)
rDeblend1   [0,1] Blend flag for r-band. (meta.code)
rSaturated0   [0,1] Saturation flag for r-band (meta.code)
rMJD54280.11977 d Modified Julian Date for the r exposure (time.epoch)
rSeeing 0.79 arcsec Average FWHM in the same CCD frame (phys.angSize)
rDetectionID571007-4-21782   Unique identifier of the r detection (Note 4)   (meta.id)
rX1741.32 pix Pixel position in the r-band exposure (pos.cartesian.x;instr.det)
rY3166.38 pix Pixel position in the r-band exposure (pos.cartesian.y;instr.det)
i17.04 mag (i) i mag using 2.3 arcsec diameter aperture (Vega scale) (phot.mag;em.opt.I)
iErr 0.01 mag Uncertainty for i (Note 2)   (stat.error;phot.mag)
iPeakMag17.13 mag Alternative i mag derived from the peak pixel height (Vega scale) (phot.mag;em.opt.I)
iPeakMagErr 0.03 mag Uncertainty in iPeakMag (Note 2)   (stat.error;phot.mag)
iAperMag117.20 mag Alternative i mag using the 1.2 arcsec diameter aperture (Vega scale) (phot.mag)
iAperMag1Err 0.01 mag Uncertainty in iAperMag1 (Note 2)   (stat.error;phot.mag)
iAperMag316.78 mag Alternative i mag using the 3.3 arcsec diameter aperture (Vega scale) (phot.mag)
iAperMag3Err 0.01 mag Uncertainty in iAperMag3 (Note 2)   (stat.error;phot.mag)
iGauSig 0.93 pix RMS of axes of ellipse fit in i-band (stat.error)
iEll 0.21   Ellipticity in the i-band (src.ellipticity)
iPA 95.70 deg Position angle in the i-band (pos.posAng)
iClass 1  Discrete image classification flag (Note 3)   (meta.code.class)
iClassStat 20.11   N(0,1) stellarness-of-profile statistic (stat)
iDeblend1   [0,1] Blend flag for i-band. (meta.code)
iSaturated0   [0,1] Saturation flag for i-band (meta.code)
iMJD54280.12052 d Modified Julian Date for the i exposure (time.epoch)
iSeeing 0.70 arcsec Average FWHM in the same CCD frame (phys.angSize)
iDetectionID571008-4-24490   Unique identifier of the i detection (Note 4)   (meta.id)
iX1741.77 pix Pixel position in the i-band exposure (pos.cartesian.x;instr.det)
iY3165.27 pix Pixel position in the i-band exposure (pos.cartesian.y;instr.det)
iXi -0.08 arcsec offset of the i-band position relative to the ra column (pos.angDistance)
iEta 0.02 arcsec offset of the i-band position relative to the dec column (pos.angDistance)
ha17.73 mag (i) H-alpha mag using 2.3" diameter aperture (Vega scale) (phot.mag)
haErr 0.02 mag Uncertainty for H-alpha (Note 2)   (stat.error;phot.mag)
haPeakMag17.71 mag Alternative H-alpha mag derived from the peak pixel height (Vega scale) (phot.mag)
haPeakMagErr 0.04 mag Uncertainty in haPeakMag (Note 2)   (stat.error;phot.mag)
haAperMag117.77 mag Alternative H-alpha mag using the 1.2 arcsec diameter aperture (Vega scale) (phot.mag)
haAperMag1Err 0.02 mag Uncertainty in haAperMag1 (Note 2)   (stat.error;phot.mag)
haAperMag317.97 mag Alternative H-alpha mag using the 3.3 arcsec diameter aperture (Vega scale) (phot.mag)
haAperMag3Err 0.03 mag Uncertainty in iAperMag3 (Note 2)   (stat.error;phot.mag)
haGauSig 0.84 pix RMS of axes of ellipse fit in H-alpha (stat.error)
haEll 0.12   Ellipticity in H-alpha (src.ellipticity)
haPA 14.60 deg Position angle in H-alpha (pos.posAng;spect.line)
haClass 1  Discrete image classification flag (Note 3)   (meta.code.class)
haClassStat 60.00   N(0,1) stellarness-of-profile statistic (stat)
haDeblend1   [0,1] Blend flag for H-alpha (meta.code)
haSaturated0   [0,1] Saturation flag for H-alpha (meta.code)
haMJD54280.11719 d Modified Julian Date for the Ha exposure (time.epoch)
haSeeing 0.83 arcsec Average FWHM in the same CCD frame (phys.angSize)
haDetectionID571006-4-17340   Unique ID of the H-alpha detection (Note 4)   (meta.id)
haX1740.88 pix Pixel position in the H-alpha exposure (pos.cartesian.x;instr.det)
haY3167.70 pix Pixel position in the H-alpha exposure (pos.cartesian.y;instr.det)
haXi -0.02 arcsec offset of the H-alpha position relative to the ra column (pos.angDistance)
haEta 0.00 arcsec offset of the H-alpha position relative to the dec column (pos.angDistance)
brightNeighb0   [0,1] Nearby very bright star flag (Note 5)   (meta.code)
deblend1   [0,1] Blend flag (meta.code)
saturated0   [0,1] Saturation flag (meta.code)
nBands3  Number of bands for source detection (meta.number)
a100   [0,1] signal-to-noise >10 flag (Note 6)   (meta.code)
a10point0   [0,1] quality criteria flag (Note 7)   (meta.code.qual)
fieldID5324_jul2007  Survey field identifier (meta.id;obs.field)
fieldGradeA++  Internal quality control score (meta.code.qual)
night20070628  UT date at the start of the night (time.epoch)
seeing 0.83 arcsec Maximum of rSeeing, iSeeing or HaSeeing (phys.angSize)
ccd4   [1-4] CCD chip number (meta.id)
nObs1   [1-9] Number of observations of the source (meta.number)
sourceID2    SourceID of the alternative detection of the object in the partner exposure (meta.id)
fieldID2    Field identifier of the partner detection (meta.id;instr.saturation;obs.field)
r2  mag r mag in the dithered partner field (Vega scale) (phot.mag;em.opt.R)
rErr2  mag Uncertainty for r2 (stat.error;phot.mag)
i2  mag i mag in the dithered partner field (Vega scale) (phot.mag;em.opt.I)
iErr2  mag Uncertainty for i2 (stat.error;phot.mag)
ha2  mag Ha mag in the dithered partner field (Vega scale) (phot.mag)
haErr2  mag Uncertainty for ha2 (stat.error;phot.mag)
errBits2    Error bitmask for the partner detection (Note 8)   (meta.code.qual)
  
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