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J/ApJS/231/15
1642
Astrometric monitoring of ultracool dwarf binaries (Dupuy+, 2017)
ReadMe+ftp
2017ApJS..231...15D
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1.
J/ApJS/231/15/table2
Relative astrometry from Keck/NIRC2 adaptive optics imaging and masking
(339 rows)
meta
J/ApJS/231/15/table2
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Column
Constraint
Explain
(
UCD
)
recno
Record number assigned by the VizieR team. Should Not be used for identification.
(
meta.record
)
(
RECORD
)
ID
(char)
Identifier (G1)
(Note)
(
meta.id;meta.main
)
(
ID_MAIN
)
Nep
[1/17] Number of epochs observed
(
meta.number
)
(
NUMBER
)
Delt
yr
(n)
[0/12] Time between first and last observations (only for table 2)
(
time.interval
)
(
TIME_INTERVAL
)
Date
"Y:M:D"
(n)
UT date of the observation
(
time.epoch;obs
)
(
TIME_DATE
)
MJD
d
(n)
Modified Julian Date of the observation (only for table 2)
(
time.epoch
)
(
TIME_DATE
)
Sep
mas
[25/389] Separation
(
pos.angDistance
)
(
POS_ANG_DIST_GENERAL
)
e_Sep
mas
[0.06/20] Uncertainty in Sep
(
stat.error
)
(
ERROR
)
PA
deg
Position angle
(
pos.posAng
)
(
POS_POS-ANG
)
e_PA
deg
[0.01/30] Uncertainty in PA
(
stat.error
)
(
ERROR
)
Delmag
mag
(n)
[-0.7/4.2] Magnitude difference between components in Filt
(
phot.mag;arith.diff
)
(
PHOT_DIFF_MAG
)
e_Delmag
mag
(n)
[0.001/0.8] Uncertainty in Delmag
(
stat.error;phot.mag
)
(
ERROR
)
Filt
(char)
Filter used in the observation
(
instr.setup;obs
)
(
INST_FILTER_CODE
)
Nf
(n)
[3/62] Number of frames obtained in the observation (only for table 2)
(
meta.number
)
(
NUMBER
)
Note
(char)
Additional notes
(Note 1)
(
meta.note
)
(
NOTE
)
ALL
cols
(n)
indicates a possible blank or NULL column
(i)
indexed column
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