J/A+A/618/A56 Gaia GraL. II. Known multiply imaged quasars (Ducourant+, 2018)
Gaia GraL: Gaia DR2 gravitational lens systems.
II. The known multiply imaged quasars.
Ducourant C., Wertz O., Krone-Martins A., Teixeira R., Le Campion J.-F.,
Galluccio L., Klueter J., Delchambre L., Surdej J., Mignard F.,
Wambsganss J., Bastian U., Graham M.J., Djorgovski S.G., Slezak E.
<Astron. Astrophys. 618, A56 (2018)>
=2018A&A...618A..56D 2018A&A...618A..56D (SIMBAD/NED BibCode)
ADC_Keywords: Gravitational lensing ; Positional data
Keywords: gravitational lensing: strong - astrometry
Abstract:
Thanks to its spatial resolution the ESA/Gaia space mission offers a
unique opportunity to discover new multiply-imaged quasars and to
study the already known lensed systems at sub-milliarcsecond
astrometric precisions. Aims : In this paper, we address the detection
of the known multiply-imaged quasars from the Gaia Data Release 2 and
determine the astrometric and photometric properties of the
individually detected images found in the Gaia DR2 catalogue.
We have compiled an exhaustive list of quasar gravitational lenses
from the literature to search for counterparts in the Gaia Data
Release 2. We then analyze the astrometric and photometric properties
of these Gaia's detections. To highlight the tremendous potential of
Gaia at the sub-milliarcsecond level we finally perform a simple
Bayesian modeling of the well-known gravitational lens system
HE0435-1223, using Gaia Data Release 2 and HST astrometry.
From 478 known multiply imaged quasars, 200 have at least one image
found in the Gaia Data Release 2. Among the 41 known quadruply-imaged
quasars of the list, 26 have at least one image in the Gaia Data
Release 2, 12 of which are fully detected (2MASX J01471020+4630433,
HE 0435-1223, SDSS1004+4112, PG1115+080, RXJ1131-1231,
2MASS J11344050-2103230, 2MASS J13102005-1714579, B1422+231,
J1606-2333, J1721+8842, WFI2033-4723, WGD2038-4008), 6 have three
counterparts, 7 have two and 1 has only one. As expected, the modeling
of HE0435-1223 shows that the model parameters are significantly
better constrained when using Gaia astrometry compared to HST
astrometry, in particular the relative positions of the background
quasar source and the centroid of the deflector. The Gaia
sub-milliarcsecond astrometry also significantly reduces the parameter
correlations.
Besides providing an up-to-date list of multiply imaged quasars and
their detection in the Gaia DR2, this paper shows that more complex
modeling scenarios will certainly benefit from Gaia sub-milliarcsecond
astrometry.
Description:
Tables 4 provides the compiled list of 478 known gravitationally
lensed systems (GL), including candidates (each line corresponds to an
image of the lense) together with informations from the Gaia DR2
whenever a source was found at less than 0.5 arcsec from the
literature's position of the image. (1) Name, (2) ref - bibliographic
reference (* designates candidates), (3) Nim - number of images of
the lens in the literature, (4) Gaia DR2 SourceId, (5,6) ICRS
positions from the Gaia DR2 at epoch 2015.5, (7,8,9) Gaia G, GBP, GRP
magnitudes and standard errors (calculated by CDS).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 289 993 Compiled list of 478 known gravitationally
lensed systems
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
Aug/01 : Gaia GraL. III. New lensed systems (Delchambre+, 2018)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 26 A26 --- Name Name of the gravitational lens system
28- 30 A3 --- Comp Name of the image component (A, B, C, D, E);
G for galaxy
32 I1 --- Nimg Number of images of the GL with astrometry
the discovery publication
34 I1 --- Ng Number of galaxies of the GL system with
astrometry the discovery publication
36- 58 A23 --- Author Year of publication and first author name
60- 78 A19 --- BibCode Bibliographic code of the publication of the
discovery (when found)
80- 81 I2 h RAh Right ascension (ICRS, epoch=2000) of the GL's
image from the discovery publication
83- 84 I2 min RAm Right ascension (ICRS, epoch=2000) of the GL's
image from the discovery publication
86- 91 F6.3 sec RAs Right ascension (ICRS, epoch=2000) of the GL's
image from the discovery publication
93 A1 ---- DE- Declination sign (ICRS, epoch=2000) of the
GL's image from the discovery publication
94- 95 I2 deg DEd Declination (ICRS, epoch=2000) of the GL's
image from the discovery publication
97- 98 I2 arcmin DEm Declination (ICRS, epoch=2000) of the GL's
image from the discovery publication
100-105 F6.3 arcsec DEs Declination (ICRS, epoch=2000) of the GL's
image from the discovery publication
107-117 F11.7 deg RAdeg Right ascension (ICRS, epoch=2000) of the GL's
image from the discovery publication
119-129 F11.7 deg DEdeg Declination (ICRS, epoch=2000) of the GL's
image from the discovery publication
131-149 I19 --- DR2SId ? Unique source identifier in Gaia DR2
151-165 F15.11 deg RAGdeg ?=0 Gaia DR2 barycentric right ascension
(ICRS) at Ep=2015.5 (1)
167-173 F7.4 deg e_RAGdeg ?=0 Standard error of right ascension
(e_RA*cosDE) (1)
175-189 F15.11 deg DEGdeg ?=0 Gaia DR2 barycentric declination (ICRS)
at Ep=2015.5 (1)
191-197 F7.4 deg e_DEGdeg ?=0 Standard error of declination
(e_DE*cosDE) (1)
199-204 F6.3 mag Gmag ?=0 G-band mean magnitude from Gaia DR2
206-211 F6.4 mag e_Gmag ?=0 Standard error of G-band mean magnitude
(added by CDS)
213-219 F7.3 mas/yr pmRA ?=0 Proper motion in right ascension direction
(pmRA*cosDE) from Gaia DR2
221-225 F5.3 mas/yr e_pmRA ?=0 Standard error of proper motion in
right ascension direction from Gaia DR2
227-233 F7.3 mas/yr pmDE ?=0 Proper motion in declination direction
from Gaia DR2
235-239 F5.3 mas/yr e_pmDE ?=0 Standard error of proper motion in
declination direction from Gaia DR2
241-248 F8.4 mas Plx ?=0 Absolute stellar parallax from Gaia DR2
250-255 F6.4 mas e_Plx ?=0 Standard error of parallax from Gaia DR2
257-263 F7.4 mag BPmag ?=0 Integrated BP mean magnitude from Gaia DR2
265-270 F6.4 mag e_BPmag ?=0 Standard error of BP mean magnitude
(added by CDS)
272-277 F6.3 mag RPmag ?=0 Integrated RP mean magnitude from Gaia DR2
279-283 F5.3 mag e_RPmag ?=0 Standard error of RP mean magnitude
(added by CDS)
285 A1 --- testDR2 [0/1] Flag of presence in GDR2 (2)
289 A1 --- Status [0/1] Status of the lens system (3)
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Note (1): Set to 0 if absent from Gaia DR2.
Note (2): Flag of presence in GDR2 as follows:
1 = present
0 = absent
Note (3): Status of the lens system as follows:
1 = confirmed
0 = candidate
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Acknowledgements:
Christine Ducourant, christine.ducourant(at)u-bordeaux.fr
References:
Krone-Martins et al. Paper I. 2018A&A...616L..11K 2018A&A...616L..11K
Ducourant et al. Paper II. 2018A&A...618A..56D 2018A&A...618A..56D This catalogue
Delchambre et al. Paper III. 2019A&A...622A.165D 2019A&A...622A.165D Cat. J/A+A/622/A165
Wertz et al. Paper IV. 2019A&A...628A..17W 2019A&A...628A..17W
Krone-Martins et al. Paper V. 2019arXiv191208977K 2019arXiv191208977K
Stern et al. Paper VI. 2021ApJ...921...42S 2021ApJ...921...42S Cat. J/ApJ/921/42
Connor et al. Paper VII. 2022ApJ...927...45C 2022ApJ...927...45C
(End) Patricia Vannier [CDS] 16-Jul-2018