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phase: 3

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J/ApJ/461/127

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Distance
Distance (x,y)
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J2000
B1950
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Simple Target List Of Targets

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	J/ApJ/461/127	29518		The Einstein Two-Sigma Catalog (Moran+ 1996) ReadMe+ftp Similar Catalogs Post annotation
1.	J/ApJ/461/127/twosigma		The 2-sigma catalog (46186 rows)

Simple Constraint List Of Constraints

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constraints help

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Constraint

Explain (UCD)

recno

Record number within the original table (starting from 1) (meta.record) (RECORD)

RA1950

RA (1950) of the source (pos.eq.ra;meta.main) (POS_EQ_RA_MAIN)

DE1950

Dec (1950) of the source (pos.eq.dec;meta.main) (POS_EQ_DEC_MAIN)

S/N

Signal-to-noise ratio of the source (Note) (stat.snr) (INST_S/N)

IPCSEQ

IPC Sequence number containing the source (meta.id;meta.main) (ID_MAIN)

cnts125

Number of background-subtracted counts collected within a 1.25 arcmin radius circular aperture (Note) (instr.background) (INST_BACKGROUND)

cnts20

Number of background-subtracted counts collected within a 2.0 arcmin radius circular aperture (Note) (instr.background) (INST_BACKGROUND)

exp125

s

flatfield-weighted exposure time for the source in the 1.25 arcmin radius aperture (Note) (time.duration;obs.exposure) (TIME_EXPTIME)

exp20

s

flatfield-weighted exposure time for the source in the 2.0 arcmin radius aperture (Note) (time.duration;obs.exposure) (TIME_EXPTIME)

N125

Number of "good" pixels used for count in the 1.25 arcmin radius aperture (Note) (meta.number) (NUMBER)

N20

Number of "good" pixels used for count in the 2.0 arcmin radius aperture (Note) (meta.number) (NUMBER)

Nbg

Number of "good" pixels used for the background count in the concentric 3-6 arcmin radius annulus (Note) (meta.number) (NUMBER)

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