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Table: sdss_dr13.wisematch_gal
(The bold columns are indexed columns)
Column NameDescriptionDatatype
cc_flagsContamination and confusion flag. Four character string, one character per band [W1/W2/W3/W4], that indicates that the photometry and/or position measurements of a source may be contaminated or biased due to proximity to an image artifact.CHAR
cntrUnique identification number for the Catalog source. This number is formed entirely from the source_id, which is in turn formed from the coadd_id and source number src.BIGINT
decJ2000 declination with respect to the 2MASS PSC reference frame.DOUBLE
designationSexagesimal, equatorial position-based source name in the form: hhmmss.ss+ddmmss.s.CHAR
ext_flgExtended source flag. This is an integer flag, the value of which indicates whether or not the morphology of a source is consistent with the WISE point spread function in any band, or whether the source is associated with or superimposed on a previously known extended object from the 2MASS Extended Source Catalog (XSC).INTEGER
match_distDistance between the two matched objectsREAL
moon_levScattered moonlight contamination flag. This is a four-character string, one character per band, in which the value is an integer indicates the fraction of single-exposure frames on which the source was measured that were possibly contaminated by scattered moonlight. The value in each band is given by [ceiling(#frmmoon/#frames*10)], with a maximum value of 9, where #frmmoon is the number of affected frames and #frames is the total number of frames on which the source was measured.CHAR
nmatchesNumber of matchesSMALLINT
ph_qualPhotometric quality flag. Four character flag, one character per band [W1/W2/W3/W4], that provides a shorthand summary of the quality of the profile-fit photometry measurement in each band, as derived from the measurement signal-to-noise ratio.CHAR
raJ2000 right ascension with respect to the 2MASS PSC reference frameDOUBLE
sigdecOne-sigma uncertainty in declination coordinateREAL
sigraOne-sigma uncertainty in right ascension coordinateREAL
sweep_indexBIGINT
var_flgVariability flag. The variability flag is a four-character string, one character per band, in which the value for each band is related to the probability that the source flux measured on the individual WISE exposures was not constant with time.CHAR
w1covMean pixel coverage in W1. This column gives the mean pixel value from the W1 Atlas Tile Coverage Map within the 'standard' aperture, a circular area with a radius of 8.25'' centered on the position of this source.REAL
w1flgW1 'standard' aperture measurement quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.SMALLINT
w1mInteger frame coverage. This column gives the number of individual 7.7s W1 exposures on which a profile-fit measurement of this source was possible.SMALLINT
w1magW1 'standard' aperture magnitude. This is the curve-of-growth corrected source brightness measured in an 8.25'' radius circular aperture centered on the source position on the Atlas Image.REAL
w1mproW1 magnitude measured with profile-fitting photometry, or the magnitude of the 95% confidence brightness upper limit if the W1 flux measurement has SNR<2. This column is null if the source is nominally detected in W1, but no useful brightness estimate could be made.REAL
w1nmInteger frame detection count. This column gives the number of individual 7.7s exposures on which this source was detected with SNR>3 in the W1 profile-fit measurement. This number can be zero for sources that are well-detected on the coadded Atlas Image, but too faint for detection on the single exposures.SMALLINT
w1satSaturated pixel fraction, W1. The fraction of all pixels within the profile-fitting area in the stack of single-exposure images used to characterize this source that are flagged as saturated. A value larger than 0.0 indicates one or more pixels of saturation. Saturation begins to occur for point sources brighter than [W1]~8 mag. Saturation may occur in fainter sources because of a charged particle strike.REAL
w1sigmUncertainty in the W1 'standard' aperture magnitude.REAL
w1sigmproW1 profile-fit photometric measurement uncertainty in mag units. This column is null if the W1 profile-fit magnitude is a 95% confidence upper limit or if the source is not measurable.REAL
w1snrW1 profile-fit measurement signal-to-noise ratio. This value is the ratio of the flux (w1flux) to flux uncertainty (w1sigflux)in the W1 profile-fit photometry measurement. This column is null if w1flux is negative, or if w1flux or w1sigflux are null.REAL
w2covMean pixel coverage in W2. This column gives the mean pixel value from the W2 Atlas Tile Coverage Map within the 'standard' aperture, a circular area with a radius of 8.25'' centered on the position of this source.REAL
w2flgW2 'standard' aperture measurement quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.SMALLINT
w2mInteger frame coverage. This column gives the number of individual 7.7s W2 exposures on which a profile-fit measurement of this source was possible.SMALLINT
w2magW2 'standard' aperture magnitude. This is the curve-of-growth corrected source brightness measured in an 8.25'' radius circular aperture centered on the source position on the Atlas Image.REAL
w2mproW2 magnitude measured with profile-fitting photometry, or the magnitude of the 95% confidence brightness upper limit if the W2 flux measurement has SNR<2. This column is null if the source is nominally detected in W2, but no useful brightness estimate could be made.REAL
w2nmInteger frame detection count. This column gives the number of individual 7.7s exposures on which this source was detected with SNR>3 in the W2 profile-fit measurement. This number can be zero for sources that are well-detected on the coadded Atlas Image, but too faint for detection on the single exposures.SMALLINT
w2satSaturated pixel fraction, W2. The fraction of all pixels within the profile-fitting area in the stack of single-exposure images used to characterize this source that are flagged as saturated. A value larger than 0.0 indicates one or more pixels of saturation. Saturation begins to occur for point sources brighter than [W2]~7 mag. Saturation may occur in fainter sources because of a charged particle strike.REAL
w2sigmUncertainty in the W2 'standard' aperture magnitude.REAL
w2sigmproW2 profile-fit photometric measurement uncertainty in mag units. This column is null if the W2 profile-fit magnitude is a 95% confidence upper limit or if the source is not measurable.REAL
w2snrW2 profile-fit measurement signal-to-noise ratio. This value is the ratio of the flux (w2flux to flux uncertainty (w2sigflux)in the W2 profile-fit photometry measurement. This column is null if w2flux is negative, or if w2flux or w2sigflux are null.REAL
w3covMean pixel coverage in W3. This column gives the mean pixel value from the W3 Atlas Tile Coverage Map within the 'standard' aperture, a circular area with a radius of 8.25'' centered on the position of this source.REAL
w3flgW3 'standard' aperture measurement quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.SMALLINT
w3mInteger frame coverage. This column gives the number of individual 8.8s W3 exposures on which a profile-fit measurement of this source was possible.SMALLINT
w3magW3 'standard' aperture magnitude. This is the curve-of-growth corrected source brightness measured in an 8.25'' radius circular aperture centered on the source position on the Atlas Image.REAL
w3mproW3 magnitude measured with profile-fitting photometry, or the magnitude of the 95% confidence brightness upper limit if the W3 flux measurement has SNR<2. This column is null if the source is nominally detected in W3, but no useful brightness estimate could be made.REAL
w3nmInteger frame detection count. This column gives the number of individual 8.8s exposures on which this source was detected with SNR>3 in the W3 profile-fit measurement. This number can be zero for sources that are well-detected on the coadded Atlas Image, but too faint for detection on the single exposures.SMALLINT
w3satSaturated pixel fraction, W3. The fraction of all pixels within the profile-fitting area source in the stack of single-exposure images used to characterize this source that are flagged as saturated. A value larger than 0.0 indicates one or more pixels of saturation. Saturation begins to occur for point sources brighter than [W3]~4 mag. Saturation may occur in fainter sources because of a charged particle strike.REAL
w3sigmUncertainty in the W3 'standard' aperture magnitude.REAL
w3sigmproW3 profile-fit photometric measurement uncertainty in mag units. This column is null if the W3 profile-fit magnitude is a 95% confidence upper limit or if the source is not measurable.REAL
w3snrW3 profile-fit measurement signal-to-noise ratio. This value is the ratio of the flux (w3flux to flux uncertainty (w3sigflux)in the W3 profile-fit photometry measurement. This column is null if w3flux is negative, or if w3flux or w3sigflux are null.REAL
w4covMean pixel coverage in W4. This column gives the mean pixel value from the W4 Atlas Tile Coverage Map within the 'standard' aperture, a circular area with a radius of 16.5'' centered on the position of this source.REAL
w4flgW4 'standard' aperture measurement quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.SMALLINT
w4mInteger frame coverage. This column gives the number of individual 8.8s W4 exposures on which a profile-fit measurement of this source was possible.SMALLINT
w4magW4 'standard' aperture magnitude. This is the curve-of-growth corrected source brightness measured in a 16.5'' radius circular aperture centered on the source position on the Atlas Image.REAL
w4mproW4 magnitude measured with profile-fitting photometry, or the magnitude of the 95% confidence brightness upper limit if the W4 flux measurement has SNR<2. This column is null if the source is nominally detected in W4, but no useful brightness estimate could be made.REAL
w4nmInteger frame detection count. This column gives the number of individual 8.8s exposures on which this source was detected with SNR>3 in the W4 profile-fit measurement. This number can be zero for sources that are well-detected on the coadded Atlas Image, but too faint for detection on the single exposures.SMALLINT
w4satSaturated pixel fraction, W4. The fraction of all pixels within the profile-fitting area in the stack of single-exposure images used to characterize this source that are flagged as saturated. A value larger than 0.0 indicates one or more pixels of saturation. Saturation begins to occur for point sources brighter than [W4]~0 mag. Saturation may occur in fainter sources because of a charged particle strike.REAL
w4sigmUncertainty in the W4 'standard' aperture magnitude.REAL
w4sigmproW4 profile-fit photometric measurement uncertainty in mag units. This column is null if the W4 profile-fit magnitude is a 95% confidence upper limit or if the source is not measurable.REAL
w4snrW4 profile-fit measurement signal-to-noise ratio. This value is the ratio of the flux (w4flux to flux uncertainty (w4sigflux)in the W4 photometry measurement. This column is null if w4flux is negative, or if w4flux or w4sigflux are null.REAL
wise_indexBIGINT
wise_sliceWISE sliceBIGINT


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