J/MNRAS/437/3603 NIR proper motion catalogue from UKIDSS-LAS (Smith+, 2014)
A 1500 deg2 near infrared proper motion catalogue from the UKIDSS
Large Area Survey.
Smith L., Lucas P.W., Burningham B., Jones H.R.A., Smart R.L., Andrei A.H.,
Catalan S., Pinfield D.J.
<Mon. Not. R. Astron. Soc., 437, 3603-3625 (2014)>
=2014MNRAS.437.3603S 2014MNRAS.437.3603S (SIMBAD/NED BibCode)
ADC_Keywords: Infrared sources ; Proper motions ; Photometry, infrared
Keywords: catalogues - proper motions - binaries: general - brown dwarfs -
stars: kinematics and dynamics; stars: low-mass
Abstract:
The United Kingdom Infrared Deep Sky Survey (UKIDSS) Large Area Survey
(LAS) began in 2005, with the start of the UKIDSS programme as a 7
year effort to survey roughly 4000deg2 at high Galactic latitudes in
Y, J, H and K bands. The survey also included a significant quantity
of two epoch J band observations, with an epoch baseline greater than
2 years to calculate proper motions. We present a near-infrared proper
motion catalogue for the 1500deg2 of the two epoch LAS data, which
includes 135625 stellar sources and a further 88324 with ambiguous
morphological classifications, all with motions detected above the
5σ level. We developed a custom proper motion pipeline which we
describe here. Our catalogue agrees well with the proper motion data
supplied for a 300deg2 subset in the current Wide Field Camera
Science Archive (WSA) 10th data release (DR10) catalogue, and in
various optical catalogues, but it benefits from a larger matching
radius and hence a larger upper proper motion detection limit. We
provide absolute proper motions, using LAS galaxies for the relative
to absolute correction. By using local second-order polynomial
transformations, as opposed to linear transformations in the WSA, we
correct better for any local distortions in the focal plane, not
including the radial distortion that is removed by the UKIDSS
pipeline. We present the results of proper motion searches for new
brown dwarfs and white dwarfs. We discuss 41 sources in the WSA DR10
overlap with our catalogue with proper motions >300mas/yr, several of
which are new detections. We present 15 new candidate ultracool dwarf
binary systems.
Description:
We constructed two epoch catalogues for each pointing by matching
sources within the pairs of multiframes using the Starlink Tables
Infrastructure Library Tool Set (STILTS; Taylor 2006, ASP conf. Ser.
351, 666). We required pairs of sources to be uniquely paired to their
closest match within 6-arcsec, and we required the J band magnitudes
for the two epochs to agree within 0.5mag, to minimize mismatches.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 230 223949 Catalogue
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See also:
II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 10 F10.6 deg RAdeg Right ascension (J2000)
12- 21 F10.6 deg DEdeg Declination (J2000)
23- 28 F6.3 mag Ymag UKIDSS Y magnitude
30- 35 F6.3 mag e_Ymag ?=-9.999 rms uncertainty on Ymag
37- 42 F6.3 mag J1mag ?=-9.999 First epoch UKIDSS J magnitude
44- 49 F6.3 mag e_J1mag ?=-9.999 rms uncertainty on J1mag
51- 56 F6.3 mag J2mag ?=-9.999 Second epoch UKIDSS J magnitude
58- 63 F6.3 mag e_J2mag ?=-9.999 rms uncertainty on J2mag
65- 70 F6.3 mag Hmag ?=-9.999 UKIDSS H magnitude
72- 77 F6.3 mag e_Hmag ?=-9.999 rms uncertainty on H1mag
79- 84 F6.3 mag Kmag ?=-9.999 UKIDSS K magnitude
86- 91 F6.3 mag e_Kmag ?=-9.999 rms uncertainty on Kmag
93-100 F8.6 --- J1ell First epoch J band ellipticity
102-112 F11.6 deg J1PA First epoch J band ellipticity
position angle
114-121 F8.6 --- J2ell Second epoch J band ellipticity
123-133 F11.6 deg J2PA Second epoch J band ellipticity
position angle
135-136 I2 --- J1class First epoch J band class (1)
138-139 I2 --- J2class Second epoch J band class (1)
141-148 F8.2 mas/yr pmRArel Relative proper motion in RA*cosDE
150-157 F8.2 mas/yr pmDErel Relative proper motion in DE
159-163 F5.2 mas/yr e_pmRArel rms uncertainty on pmRArel
165-169 F5.2 mas/yr e_pmDErel rms uncertainty on pmDErel
171-178 F8.2 mas/yr pmRA Proper motion in RA*cosDE
180-187 F8.2 mas/yr pmDE Proper motion in DE
189-193 F5.2 mas/yr e_pmRA rms uncertainty on pmRA
195-199 F5.2 mas/yr e_pmDE rms uncertainty on pmDE
201-207 F7.1 d ObsJ1 MJD of first epoch J band
209-215 F7.5 yr Ep Epoch baseline
217-228 I12 --- SourceID ?=-99999999999 UKIDSS DR10 source ID
230 I1 --- Local [0,1] Local array solution (2)
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Note (1): Morphological class as follows:
1 = galaxy
0 = noise
-1 = star
-2 = probable star
-7 = bad pixel within 2-arcsec aperture
-9 = saturated
Note (2): Code as follows:
1 = a source has a proper motion calculated using a local transform
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 08-Jul-2015