Information on Service 'Astrometric Microlensing Events Predicted from Gaia eDR3'

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From the Gaia eDR3 catalogue we predict astrometric microlensing events by foreground stars with high proper motion (μ > 100 mas/yr) passing a background source in the next decades. Using Gaia DR3 photometry we determine an approximate mass of the lens, which we use to calculate the expected microlensing effects. This yields 4842 microlensing events by 3791 different lenses between 2010 and 2066 with expected shifts larger than 0.1 mas between the lensed and unlensed positions of the source. The past events might be interested when analyzing the individual Gaia measurements). 685 of those are expected to happen within the next decade (2021-2031). For 140 events we also expect a magnification between 1 mmag and 0.6 mag.

For a list of all services and tables belonging to this service's resource, see Information on resource 'Astrometric Microlensing Events Predicted from Gaia eDR3'

Overview

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Input Fields

The following fields are available to provide input to the service (with some renderers, some of these fields may be unavailable):

NameTable Head DescriptionUnitUCD
DEC Delta (ICRS) Declination (ICRS decimal) deg pos.eq.dec
dist d_min ♁ Estimated distance at closest approach. mas pos.angdistance
hscs_pos Position/Name Coordinates (as h m s, d m s or decimal degrees), or SIMBAD-resolvable object N/A N/A
hscs_sr Search radius Search radius in arcminutes N/A N/A
lens_phot_g_mean_mag L. Mag G Mean magnitude of the lens in the integrated G band from Gaia eDR3. mag phot.mag;em.opt.V
MAXREC Match limit Maximum number of records returned. Pass 0 to retrieve service parameters. N/A N/A
ob_phot_g_mean_mag O. Mag G Mean magnitude of the lensed object in the integrated G band from Gaia eDR3. mag phot.mag;em.opt.V
RA Alpha (ICRS) Right Ascension (ICRS decimal) deg pos.eq.ra
RESPONSEFORMAT Output Format File format requested for output. N/A meta.code.mime
SR Search Radius Search radius deg N/A
tca T_min ♁ Estimated time of the closest approach. yr time.epoch
VERB Verbosity Exhaustiveness of column selection. VERB=1 only returns the most important columns, VERB=2 selects the columns deemed useful to the average user, VERB=3 returns a table with all available columns. N/A N/A

Default Output Fields

The following fields are contained in the output by default. More fields may be available for selection; these would be given below in the VOTable output fields.

NameTable Head DescriptionUnitUCD
_r Dist. Distance to cone center deg pos.distance
dist d_min ♁ Estimated distance at closest approach. mas pos.angdistance
err_dist Err. d_min ♁ Error d_min. mas stat.error;pos.angdistance
err_tca Err. T_min ♁ Error in tca. yr stat.error;time.epoch
err_theta_e Err. θ_E Error in the Einstein radius of the event mas stat.error;phys.angsize
event_id Event ID Unique identifier of this event. This is the decimal representation of the Gaia eDR3 source_id of the lens, and a disambiguator for the lensed object. N/A meta.id;meta.main
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_err_tca Err. T_min L2 Error in l2_tca. yr stat.error;time.epoch
l2_magnification δm L2 Maximal magnificationas seen from Earth-Sun L2 point. mag phot.mag;arith.ratio
l2_magnification_error_m L2 - Left 67% confidence interval of l2_magnification. mag stat.error;phot.mag;arith.ratio
l2_magnification_error_p L2 + Right 67% confidence interval of l2_magnification. mag stat.error;phot.mag;arith.ratio
l2_shift A shift L2 Maximal astrometric shift of the center of lightas seen from Earth-Sun L2 point. mas pos;arith.diff
l2_shift_error_m L2 - Left 67% confidence interval of l2_shift. mas stat.error;pos;arith.diff
l2_shift_error_p L2 + Right 67% confidence interval of 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_shift_lum_error_m L2 - Left 67% confidence interval of l2_shift_lum. mas stat.error;pos;arith.diff
l2_shift_lum_error_p L2 + Right 67% confidence interval of 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_shift_plus_error_m L2 - Left 67% confidence interval of l2_shift_plus. mas stat.error;pos;arith.diff
l2_shift_plus_error_p L2 + Right 67% confidence interval of l2_shift_plus. mas stat.error;pos;arith.diff
l2_tca T_min L2 Estimated time of the closest approachas seen from Earth-Sun L2 point. yr time.epoch
l2_u u L2 Estimated distance at closest approach in Einstein radiias seen from Earth-Sun L2 point. N/A pos.angdistance;stat.min
l2_u_error_m L2 - Left 67% confidence interval of l2_u. N/A stat.error;pos.angdistance;stat.min
l2_u_error_p L2 + Right 67% confidence interval of l2_u. N/A stat.error;pos.angdistance;stat.min
lens_dec L. Dec Gaia eDR3 Declination of the lens deg pos.eq.dec;meta.main
lens_err_dec Err(L.dec) Error of lens__dec from Gaia eDR3 mas stat.error;pos.eq.dec;meta.main
lens_err_ra Err(L. RA) Error of lens__ra from Gaia eDR3 mas stat.error;pos.eq.ra;meta.main
lens_id L. ID Gaia eDR3 source_id of the lens. N/A meta.id
lens_parallax L. Parallax Parallax of the lens from Gaia eDR3 mas pos.parallax
lens_phot_bp_mean_mag L. Mag BP Mean magnitude of the lens in the integrated BP band from Gaia eDR3. mag phot.mag;em.opt.B
lens_phot_g_mean_mag L. Mag G Mean magnitude of the lens in the integrated G band from Gaia eDR3. 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 eDR3. mag phot.mag;em.opt.R
lens_pmdec L. PM Dec Proper motion in Declination of the lens from Gaia eDR3 mas/yr pos.pm;pos.eq.ra
lens_pmra L. PM RA Proper motion in RA of the lens from Gaia eDR3 mas/yr pos.pm;pos.eq.ra
lens_ra L. RA Gaia eDR3 RA of the lens deg pos.eq.ra;meta.main
magnification δm ♁ Maximal magnification. mag phot.mag;arith.ratio
magnification_error_m ♁ - Left 67% confidence interval of magnification. mag stat.error;phot.mag;arith.ratio
magnification_error_p ♁ + Right 67% confidence interval of magnification. mag stat.error;phot.mag;arith.ratio
mass L. Mass Estimated mass of the lens from Gaia eDR3 solMass phys.mass
ob_dec O. Dec Gaia eDR3 Declination of the lensed object deg pos.eq.dec
ob_err_dec Err(L.dec) Error of ob__dec from Gaia eDR3 mas stat.error;pos.eq.dec
ob_err_ra Err(O. RA) Error of ob__ra from Gaia eDR3 mas stat.error;pos.eq.ra
ob_id O. ID Gaia eDR3 source_id of the lensed object. N/A meta.id
ob_parallax O. Parallax Parallax of the lensed object from Gaia eDR3 mas pos.parallax
ob_phot_bp_mean_mag O. Mag BP Mean magnitude of the lensed object in the integrated BP band from Gaia eDR3. mag phot.mag;em.opt.B
ob_phot_g_mean_mag O. Mag G Mean magnitude of the lensed object in the integrated G band from Gaia eDR3. 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 eDR3. mag phot.mag;em.opt.R
ob_pmdec O. PM Dec Proper motion in Declination of the lensed object from Gaia eDR3 mas/yr pos.pm;pos.eq.ra
ob_pmra O. PM RA Proper motion in RA of the lensed object from Gaia eDR3 mas/yr pos.pm;pos.eq.ra
ob_ra O. RA Gaia eDR3 RA of the lensed object deg pos.eq.ra
shift A shift ♁ Maximal astrometric shift of the center of light. mas pos;arith.diff
shift_error_m ♁ - Left 67% confidence interval of shift. mas stat.error;pos;arith.diff
shift_error_p ♁ + Right 67% confidence interval of shift. mas stat.error;pos;arith.diff
shift_lum L shift ♁ Maximal astrometric shift including lens-luminosity effects. mas pos;arith.diff
shift_lum_error_m ♁ - Left 67% confidence interval of shift_lum. mas stat.error;pos;arith.diff
shift_lum_error_p ♁ + Right 67% confidence interval of shift_lum. mas stat.error;pos;arith.diff
shift_plus Shift+ ♁ Maximal astrometric shift of brighter image. mas pos;arith.diff
shift_plus_error_m ♁ - Left 67% confidence interval of shift_plus. mas stat.error;pos;arith.diff
shift_plus_error_p ♁ + Right 67% confidence interval of shift_plus. mas stat.error;pos;arith.diff
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
t_aml Duration Approximate duration of the event (i.e., shift > ~0.1 mas). yr time.duration
tca T_min ♁ Estimated time of the closest approach. yr time.epoch
theta_e θ_E Einstein radius of the event mas phys.angsize
u u ♁ Estimated distance at closest approach in Einstein radii. N/A pos.angdistance;stat.min
u_error_m ♁ - Left 67% confidence interval of u. N/A stat.error;pos.angdistance;stat.min
u_error_p ♁ + Right 67% confidence interval of u. N/A stat.error;pos.angdistance;stat.min

VOTable Output Fields

The following fields are available in VOTable output. The verbosity level is a number intended to represent the relative importance of the field on a scale of 1 to 30. The services take a VERB argument. A field is included in the output if their verbosity level is less or equal VERB*10.

NameTable Head DescriptionUnitUCD Verb. Level
event_id Event ID Unique identifier of this event. This is the decimal representation of the Gaia eDR3 source_id of the lens, and a disambiguator for the lensed object. N/A meta.id;meta.main 1
lens_ra L. RA Gaia eDR3 RA of the lens deg pos.eq.ra;meta.main 1
lens_dec L. Dec Gaia eDR3 Declination of the lens deg pos.eq.dec;meta.main 1
ob_ra O. RA Gaia eDR3 RA of the lensed object deg pos.eq.ra 1
ob_dec O. Dec Gaia eDR3 Declination of the lensed object deg pos.eq.dec 1
lens_phot_g_mean_mag L. Mag G Mean magnitude of the lens in the integrated G band from Gaia eDR3. mag phot.mag;em.opt.V 5
lens_phot_rp_mean_mag L. Mag RP Mean magnitude of the lens in the integrated RP band from Gaia eDR3. mag phot.mag;em.opt.R 5
lens_phot_bp_mean_mag L. Mag BP Mean magnitude of the lens in the integrated BP band from Gaia eDR3. mag phot.mag;em.opt.B 5
ob_phot_g_mean_mag O. Mag G Mean magnitude of the lensed object in the integrated G band from Gaia eDR3. mag phot.mag;em.opt.V 5
ob_phot_rp_mean_mag O. Mag RP Mean magnitude of the lensed object in the integrated RP band from Gaia eDR3. mag phot.mag;em.opt.R 5
ob_phot_bp_mean_mag O. Mag BP Mean magnitude of the lensed object in the integrated BP band from Gaia eDR3. mag phot.mag;em.opt.B 5
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 5
theta_e θ_E Einstein radius of the event mas phys.angsize 5
t_aml Duration Approximate duration of the event (i.e., shift > ~0.1 mas). yr time.duration 5
tca T_min ♁ Estimated time of the closest approach. yr time.epoch 5
dist d_min ♁ Estimated distance at closest approach. mas pos.angdistance 5
err_dist Err. d_min ♁ Error d_min. mas stat.error;pos.angdistance 5
shift A shift ♁ Maximal astrometric shift of the center of light. mas pos;arith.diff 5
shift_lum L shift ♁ Maximal astrometric shift including lens-luminosity effects. mas pos;arith.diff 5
shift_plus Shift+ ♁ Maximal astrometric shift of brighter image. mas pos;arith.diff 5
magnification δm ♁ Maximal magnification. mag phot.mag;arith.ratio 5
l2_tca T_min L2 Estimated time of the closest approachas seen from Earth-Sun L2 point. yr time.epoch 5
l2_dist d_min L2 Estimated distance at closest approachas seen from Earth-Sun L2 point. mas pos.angdistance 5
l2_err_dist Err. d_min L2 Error l2_d_min. mas stat.error;pos.angdistance 5
l2_shift A shift L2 Maximal astrometric shift of the center of lightas seen from Earth-Sun L2 point. mas pos;arith.diff 5
l2_shift_lum L shift L2 Maximal astrometric shift including lens-luminosity effectsas seen from Earth-Sun L2 point. mas pos;arith.diff 5
l2_shift_plus Shift+ L2 Maximal astrometric shift of brighter imageas seen from Earth-Sun L2 point. mas pos;arith.diff 5
l2_magnification δm L2 Maximal magnificationas seen from Earth-Sun L2 point. mag phot.mag;arith.ratio 5
_r Dist. Distance to cone center deg pos.distance 10
lens_id L. ID Gaia eDR3 source_id of the lens. N/A meta.id 15
lens_err_ra Err(L. RA) Error of lens__ra from Gaia eDR3 mas stat.error;pos.eq.ra;meta.main 15
lens_err_dec Err(L.dec) Error of lens__dec from Gaia eDR3 mas stat.error;pos.eq.dec;meta.main 15
lens_pmra L. PM RA Proper motion in RA of the lens from Gaia eDR3 mas/yr pos.pm;pos.eq.ra 15
lens_pmdec L. PM Dec Proper motion in Declination of the lens from Gaia eDR3 mas/yr pos.pm;pos.eq.ra 15
lens_parallax L. Parallax Parallax of the lens from Gaia eDR3 mas pos.parallax 15
ob_id O. ID Gaia eDR3 source_id of the lensed object. N/A meta.id 15
ob_err_ra Err(O. RA) Error of ob__ra from Gaia eDR3 mas stat.error;pos.eq.ra 15
ob_err_dec Err(L.dec) Error of ob__dec from Gaia eDR3 mas stat.error;pos.eq.dec 15
ob_pmra O. PM RA Proper motion in RA of the lensed object from Gaia eDR3 mas/yr pos.pm;pos.eq.ra 15
ob_pmdec O. PM Dec Proper motion in Declination of the lensed object from Gaia eDR3 mas/yr pos.pm;pos.eq.ra 15
ob_parallax O. Parallax Parallax of the lensed object from Gaia eDR3 mas pos.parallax 15
err_theta_e Err. θ_E Error in the Einstein radius of the event mas stat.error;phys.angsize 15
err_tca Err. T_min ♁ Error in tca. yr stat.error;time.epoch 15
u u ♁ Estimated distance at closest approach in Einstein radii. N/A pos.angdistance;stat.min 15
u_error_m ♁ - Left 67% confidence interval of u. N/A stat.error;pos.angdistance;stat.min 15
u_error_p ♁ + Right 67% confidence interval of u. N/A stat.error;pos.angdistance;stat.min 15
shift_error_m ♁ - Left 67% confidence interval of shift. mas stat.error;pos;arith.diff 15
shift_error_p ♁ + Right 67% confidence interval of shift. mas stat.error;pos;arith.diff 15
shift_lum_error_m ♁ - Left 67% confidence interval of shift_lum. mas stat.error;pos;arith.diff 15
shift_lum_error_p ♁ + Right 67% confidence interval of shift_lum. mas stat.error;pos;arith.diff 15
shift_plus_error_m ♁ - Left 67% confidence interval of shift_plus. mas stat.error;pos;arith.diff 15
shift_plus_error_p ♁ + Right 67% confidence interval of shift_plus. mas stat.error;pos;arith.diff 15
magnification_error_m ♁ - Left 67% confidence interval of magnification. mag stat.error;phot.mag;arith.ratio 15
magnification_error_p ♁ + Right 67% confidence interval of magnification. mag stat.error;phot.mag;arith.ratio 15
l2_err_tca Err. T_min L2 Error in l2_tca. yr stat.error;time.epoch 15
l2_u u L2 Estimated distance at closest approach in Einstein radiias seen from Earth-Sun L2 point. N/A pos.angdistance;stat.min 15
l2_u_error_m L2 - Left 67% confidence interval of l2_u. N/A stat.error;pos.angdistance;stat.min 15
l2_u_error_p L2 + Right 67% confidence interval of l2_u. N/A stat.error;pos.angdistance;stat.min 15
l2_shift_error_m L2 - Left 67% confidence interval of l2_shift. mas stat.error;pos;arith.diff 15
l2_shift_error_p L2 + Right 67% confidence interval of l2_shift. mas stat.error;pos;arith.diff 15
l2_shift_lum_error_m L2 - Left 67% confidence interval of l2_shift_lum. mas stat.error;pos;arith.diff 15
l2_shift_lum_error_p L2 + Right 67% confidence interval of l2_shift_lum. mas stat.error;pos;arith.diff 15
l2_shift_plus_error_m L2 - Left 67% confidence interval of l2_shift_plus. mas stat.error;pos;arith.diff 15
l2_shift_plus_error_p L2 + Right 67% confidence interval of l2_shift_plus. mas stat.error;pos;arith.diff 15
l2_magnification_error_m L2 - Left 67% confidence interval of l2_magnification. mag stat.error;phot.mag;arith.ratio 15
l2_magnification_error_p L2 + Right 67% confidence interval of l2_magnification. mag stat.error;phot.mag;arith.ratio 15
mass L. Mass Estimated mass of the lens from Gaia eDR3 solMass phys.mass 20
lens_err_pmra Err(L. PM RA) Error of lens_pmra from Gaia eDR3 deg/yr pos.pm;pos.eq.ra 25
lens_err_pmdec Err(L. PM Dec) Error of lens_pmdec from Gaia eDR3 deg/yr pos.pm;pos.eq.dec 25
lens_err_parallax Err. L. Par. Standard error of the parallax the lens from Gaia eDR3 mas stat.error;pos.parallax 25
ob_err_pmra Err(O. PM RA) Error of ob_pmra from Gaia eDR3 deg/yr pos.pm;pos.eq.ra 25
ob_err_pmdec Err(O. PM Dec) Error of ob_pmdec from Gaia eDR3 deg/yr pos.pm;pos.eq.dec 25
ob_err_parallax Err. O. Par. Standard error of the parallax the lensed object from Gaia eDR3 mas stat.error;pos.parallax 25
ob_displacement_ra_doubled 2 Δα Doubled Displacement in RA between DR2 and DR3, cos(δ) applied. mas pos.eq.ra;arith.diff 25
ob_displacement_dec_doubled 2 Δδ Doubled Displacement in Dec between DR2 and DR3 mas pos.eq.dec;arith.diff 25
err_mass Err. L. Mass Error in the mass of the lens from Gaia eDR3 solMass stat.error;phys.mass 30

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