J/MNRAS/CODE ULAS Proper Motion Catalogue (Smith et al., 2013) ====================================================================== ULAS Proper Motion Catalogue Smith, L. et al. ====================================================================== Description: The UKIDSS Large Area Survey (LAS) began in 2005, with the start of the UKIDSS program as a 7 year effort to survey roughly 4000 deg2 at high galactic latitudes in Y, J, H and K bands. The survey also included a significant quantity of 2-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 1500 deg2 of the 2 epoch LAS data, which includes 121,248 stellar sources with motions detected above the 5s level. We developed a bespoke proper motion pipeline which we describe here. Our catalogue agrees well with the proper motion data supplied for a 300 deg2 subset in the current WFCAM Science Archive (WSA) tenth 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. Furthermore, we provide absolute proper motions, using LAS galaxies for the relative to absolute correction. Also, by using local 2nd 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. File Summary: ---------------------------------------------------------------------- TableName Records Explanations ---------------------------------------------------------------------- ReadMe.txt This file ULAS_PM_catalogue_5sig.fits 223949 Source data ---------------------------------------------------------------------- Description of tables: ULAS_PM_catalogue_5sig ---------------------------------------------------------------------- Type Units Label Explanations ---------------------------------------------------------------------- double deg RA Right Ascension of 1st epoch J band detection double deg Dec Declination of 1st epoch J band detection float mag Y UKIDSS DR10 Y magnitude float mag e_Y Uncertainty on UKIDSS DR10 Y magnitude float mag J1 UKIDSS FITS File 1st epoch J band magnitude float mag e_J1 Uncertainty on UKIDSS FITS File 1st epoch J band magnitude float mag J2 UKIDSS FITS File 2nd epoch J band magnitude float mag e_J2 Uncertainty on UKIDSS FITS File 2nd epoch J band magnitude float mag H UKIDSS DR10 H magnitude float mag e_H Uncertainty on UKIDSS DR10 H magnitude float mag K UKIDSS DR10 K magnitude float mag e_K Uncertainty on UKIDSS DR10 K magnitude float J1ell Ellipticity of 1st epoch J band detection float deg J1PA Position angle of ellipticity of 1st epoch J band detection float J2ell Ellipticity of 2nd epoch J band detection float deg J2PA Position angle of ellipticity of 2nd epoch J band detection short J1class Morphological classification of 1st epoch J band detection (1) short J2class Morphological classification of 2nd epoch J band detection (1) float mas/yr RAPM_rel Relative proper motion in RAcosDec float mas/yr DecPM_rel Relative proper motion in Dec float mas/yr e_RAPM_rel Uncertainty on relative proper motion in RAcosDec float mas/yr e_DecPM_rel Uncertainty on relative proper motion in Dec float mas/yr RAPM Proper motion in RAcosDec float mas/yr DecPM Proper motion in Dec float mas/yr e_RAPM Uncertainty on proper motion in RAcosDec float mas/yr e_DecPM Uncertainty on proper motion in Dec double JD J1MJDobs Modified Julian Date of 1st epoch observation double years EpochBaseline Epoch baseline long SourceID UKIDSS DR10 sourceID (2) boolean local Local/Global transformation flag (X) ---------------------------------------------------------------------- ---------------------------------------------------------------------- Note (1): Morphological classification flags: 1 Galaxy 0 Noise -1 Star -2 Probable star -7 Bad pixel within 2" aperture -9 Saturated The CASU standard source extraction documentation contains more information on these morphological classifications. Note (2): For crossmatching to UKIDSS DR10 only, not previous releases. Note (3): 'true' indicates a local transform was used for proper motion. ---------------------------------------------------------------------- Acknowledgements: Leigh Smith l.smith10@herts.ac.uk References: Smith, L. 2013; in press ====================================================================== (End) Leigh Smith [CAR/UH, UK] 8-Oct-2013