Table information for 'plc2.data'

General

Table Description: The final candidate table for astrometric microlensing events predicted from Gaia DR2. This has estimates of minimal distances, epochs, etc. Columns prefixed with lens_ are for the lens, columns prefixed with ob_ are for the lensed object.

This table is available for ADQL queries and through the TAP endpoint.

Resource Description: From the Gaia DR2 catalogue we predict astrometric microlensing events by foreground stars with high proper motion (µ_tot >150mas/yr) passing a background source in the next decades. Using Gaia DR2 photometry we determine an approximate mass of the lens, which we use to calculate the expected microlensing effects. This yields 3914 microlensing events by 2875 different lenses between 2010 and 2065 with expected shifts larger than 0.1 mas between the lensed and unlensed positions of the source. 513 of those are expected to happen between 2014.5 - 2026.5 and might be measured by Gaia. For 127 events we also expect a magnification between 1 mmag and 3 mag.

For a list of all services and tables belonging to this table's resource, see Information on resource 'Astrometric Microlensing Events Predicted from Gaia DR2'

Citing this table

This table has an associated publication. If you use data from it, it may be appropriate to reference 2018A&A...620A.175K (ADS BibTeX entry for the publication) either in addition to or instead of the service reference.

To cite the table as such, we suggest the following BibTeX entry:

@MISC{vo:plc2_data,
  year=2018,
  title={Astrometric Microlensing Events Predicted from Gaia DR2},
  author={Klüter, J. and Demleitner, M. and Proft, S.},
  url={http://dc.zah.uni-heidelberg.de/tableinfo/plc2.data},
  howpublished={{VO} resource provided by the {GAVO} Data Center}
}

Fields

Sorted by DB column index. [Sort alphabetically]

NameTable Head DescriptionUnitUCD
event_id Event ID Unique identifier of this event. This is the decimal representation of the Gaia DR2 source_id of the lens, and a disambiguator for the lensed object. N/A meta.id;meta.main
lens_id L. ID Gaia DR2 source_id of the lens. N/A meta.id
lens_ra L. RA Gaia DR2 RA of the lens deg pos.eq.ra;meta.main
lens_dec L. Dec Gaia DR2 Declication of the lens deg pos.eq.dec;meta.main
lens_err_ra Err(L. RA) Error of lens__ra from Gaia DR2 deg stat.error;pos.eq.ra;meta.main
lens_err_dec Err(L.dec) Error of lens__dec from Gaia DR2 deg stat.error;pos.eq.dec;meta.main
lens_pmra L. PM RA Proper motion in RA of the lens from Gaia DR2 deg/yr pos.pm;pos.eq.ra
lens_pmdec L. PM Dec Proper motion in Declination of the lens from Gaia DR2 deg/yr pos.pm;pos.eq.ra
lens_err_pmra Err(L. PM RA) Error of lens_pmra from Gaia DR2 deg/yr pos.pm;pos.eq.ra
lens_err_pmdec Err(L. PM Dec) Error of lens_pmdec from Gaia DR2 deg/yr pos.pm;pos.eq.dec
lens_parallax L. Parallax Parallax of the lens from Gaia DR2 deg pos.parallax
lens_err_parallax Err. L. Par. Standard error of the parallax the lens from Gaia DR2 deg stat.error;pos.parallax
lens_phot_g_mean_mag L. Mag G Mean magnitude of the lens in the integrated G band from Gaia DR2. mag phot.mag;em.opt.V
lens_phot_rp_mean_mag L. Mag RP Mean magnitude of the lens in the integrated RP band from Gaia DR2. mag phot.mag;em.opt.R
lens_phot_bp_mean_mag L. Mag BP Mean magnitude of the lens in the integrated BP band from Gaia DR2. mag phot.mag;em.opt.B
ob_id O. ID Gaia DR2 source_id of the lensed object. N/A meta.id
ob_ra O. RA Gaia DR2 RA of the lensed object deg pos.eq.ra
ob_dec O. Dec Gaia DR2 Declication of the lensed object deg pos.eq.dec
ob_err_ra Err(O. RA) Error of ob__ra from Gaia DR2 deg stat.error;pos.eq.ra
ob_err_dec Err(L.dec) Error of ob__dec from Gaia DR2 deg stat.error;pos.eq.dec
ob_pmra O. PM RA Proper motion in RA of the lensed object from Gaia DR2 deg/yr pos.pm;pos.eq.ra
ob_pmdec O. PM Dec Proper motion in Declination of the lensed object from Gaia DR2 deg/yr pos.pm;pos.eq.ra
ob_err_pmra Err(O. PM RA) Error of ob_pmra from Gaia DR2 deg/yr pos.pm;pos.eq.ra
ob_err_pmdec Err(O. PM Dec) Error of ob_pmdec from Gaia DR2 deg/yr pos.pm;pos.eq.dec
ob_parallax O. Parallax Parallax of the lensed object from Gaia DR2 deg pos.parallax
ob_err_parallax Err. O. Par. Standard error of the parallax the lensed object from Gaia DR2 deg stat.error;pos.parallax
ob_phot_g_mean_mag O. Mag G Mean magnitude of the lensed object in the integrated G band from Gaia DR2. mag phot.mag;em.opt.V
ob_phot_rp_mean_mag O. Mag RP Mean magnitude of the lensed object in the integrated RP band from Gaia DR2. mag phot.mag;em.opt.R
ob_phot_bp_mean_mag O. Mag BP Mean magnitude of the lensed object in the integrated BP band from Gaia DR2. mag phot.mag;em.opt.B
star_type L. Class Type of the lensing star: WD = White Dwarf, MS = Main Sequence, RG = Red Giant, BD = Brown Dwarf N/A src.class
mass L. Mass Estimated mass of the lens from Gaia DR2 solMass phys.mass
err_mass Err. L. Mass Error in the mass of the lens from Gaia DR2 solMass stat.error;phys.mass
theta_e θ_E Einstein radius of the event mas phys.angsize
err_theta_e Err. θ_E Error in the Einstein radius of the event mas stat.error;phys.angsize
time_scale Duration Approximate duration of the event yr time.duration
tca T_min ♁ Estimated time of the closest approach. yr time.epoch
err_tca Err. T_min ♁ Error in tca. yr stat.error;time.epoch
dist d_min ♁ Estimated distance at closest approach. mas pos.angdistance
err_dist Err. d_min ♁ Error d_min. mas stat.error;pos.angdistance
u u ♁ Estimated distance at closest approach in Einstein radii. N/A N/A
err_u Err. u ♁ Error in u. N/A N/A
shift A shift ♁ Maximal astrometric shift of the center of light. mas pos;arith.diff
err_shift Err. A shift ♁ Error in shift mas stat.error;pos;arith.diff
shift_lum L shift ♁ Maximal astrometric shift including lens-luminosity effects. mas pos;arith.diff
err_shift_lum Err. L shift ♁ Error in shift_lum. mas stat.error;pos;arith.diff
shift_plus Shift+ ♁ Maximal astrometric shift of brighter image. mas pos;arith.diff
err_shift_plus Err. shift+ ♁ Error in shift_plus. mas stat.error;pos;arith.diff
magnification δm ♁ Maximal magnification. mag phot.mag;arith.ratio
err_magnification Err. δm ♁ Error in magnification. mag stat.error;phot.mag;arith.ratio
l2_tca T_min L2 Estimated time of the closest approachas seen from Earth-Sun L2 point. yr time.epoch
l2_err_tca Err. T_min L2 Error in l2_tca. yr stat.error;time.epoch
l2_dist d_min L2 Estimated distance at closest approachas seen from Earth-Sun L2 point. mas pos.angdistance
l2_err_dist Err. d_min L2 Error l2_d_min. mas stat.error;pos.angdistance
l2_u u L2 Estimated distance at closest approach in Einstein radiias seen from Earth-Sun L2 point. N/A N/A
l2_err_u Err. u L2 Error in l2_u. N/A N/A
l2_shift A shift L2 Maximal astrometric shift of the center of lightas seen from Earth-Sun L2 point. mas pos;arith.diff
l2_err_shift Err. A shift L2 Error in l2_shift mas stat.error;pos;arith.diff
l2_shift_lum L shift L2 Maximal astrometric shift including lens-luminosity effectsas seen from Earth-Sun L2 point. mas pos;arith.diff
l2_err_shift_lum Err. L shift L2 Error in l2_shift_lum. mas stat.error;pos;arith.diff
l2_shift_plus Shift+ L2 Maximal astrometric shift of brighter imageas seen from Earth-Sun L2 point. mas pos;arith.diff
l2_err_shift_plus Err. shift+ L2 Error in l2_shift_plus. mas stat.error;pos;arith.diff
l2_magnification δm L2 Maximal magnificationas seen from Earth-Sun L2 point. mag phot.mag;arith.ratio
l2_err_magnification Err. δm L2 Error in l2_magnification. mag stat.error;phot.mag;arith.ratio

Columns that are parts of indices are marked like this.

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