2014ApJ...785..144G

Query : 2014ApJ...785..144G

2014ApJ...785..144G - Astrophys. J., 785, 144 (2014/April-3)

RINGFINDER: automated detection of galaxy-scale gravitational lenses in ground-based multi-filter imaging data.

GAVAZZI R., MARSHALL P.J., TREU T. and SONNENFELD A.

Abstract (from CDS):

We present RINGFINDER, a tool for finding galaxy-scale strong gravitational lenses in multi-band imaging data. By construction, the method is sensitive to configurations involving a massive foreground ETG and a faint, background, blue source. RINGFINDER detects the presence of blue residuals embedded in an otherwise smooth red light distribution by difference imaging in two bands. The method is automated for efficient application to current and future surveys, having originally been designed for the 150 deg2 Canada-France-Hawaii Telescope Legacy Survey (CFHTLS). We describe each of the steps of RINGFINDER. We then carry out extensive simulations to assess completeness and purity. For sources with magnification µ > 4, RINGFINDER reaches 42% (25%) completeness and 29% (86%) purity before (after) visual inspection. The completeness of RINGFINDER is substantially improved in the particular range of Einstein radii 0.''8 ≤ REin ≤ 2.''0 and lensed images brighter than g = 22.5, where it can be as high as ∼70%. RINGFINDER does not introduce any significant bias in the source or deflector population. We conclude by presenting the final catalog of RINGFINDER CFHTLS galaxy-scale strong lens candidates. Additional information obtained with Hubble Space Telescope and Keck adaptive optics high-resolution imaging, and with Keck and Very Large Telescope spectroscopy, is used to assess the validity of our classification and measure the redshift of the foreground and the background objects. From an initial sample of 640,000 ETGs, RINGFINDER returns 2500 candidates, which we further reduce by visual inspection to 330 candidates. We confirm 33 new gravitational lenses from the main sample of candidates, plus an additional 16 systems taken from earlier versions of RINGFINDER. First applications are presented in the Strong Lensing Legacy Survey galaxy-scale lens sample paper series.

Abstract Copyright: ∼

Journal keyword(s): methods: data analysis - methods: statistical - galaxies: elliptical and lenticular, cD - gravitational lensing: strong - surveys - techniques: miscellaneous

VizieR on-line data: <Available at CDS (J/ApJ/785/144): table1.dat table3.dat>

Simbad objects: 122

goto Full paper

goto View the references in ADS

Number of rows : 122
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SL2S J020457-110309 gLe 02 04 57.0 -11 03 09           ~ 3 0
2 SL2S J020457-110309 source G 02 04 57.4 -11 03 09           ~ 1 0
3 SL2S J020524-093023 gLe 02 05 24.0 -09 30 23           ~ 5 0
4 SL2S J020524-093023 source G 02 05 24.6 -09 30 23           ~ 1 0
5 SL2S J020833-071414 source G 02 08 33.1 -07 14 14           ~ 1 0
6 GAMA 1231004 gLe 02 08 33.10 -07 14 14.1           ~ 9 0
7 SL2S J021206-075528 source G 02 12 06.6 -07 55 28           ~ 1 0
8 GAMA J021206.55-075528.1 gLe 02 12 06.56 -07 55 28.3           ~ 6 0
9 SL2S J021247-055552 gLe 02 12 47.0 -05 55 52           ~ 10 0
10 SL2S J021247-055552 source G 02 12 47.8 -05 55 52           ~ 3 0
11 SL2S J021325-074355 gLe 02 13 24.520 -07 43 54.82           ~ 12 0
12 SL2S J021325-074355 source G 02 13 24.5 -07 43 55           ~ 2 0
13 SL2S J021411-040502 source G 02 14 11.2 -04 05 03           ~ 3 0
14 HSCS J021411-040502 gLe 02 14 11.240 -04 05 02.71         19.07 ~ 20 0
15 SL2S J021737-051329 source G 02 17 37.0 -05 13 29           ~ 15 0
16 SDSS J021737.16-051329.5 rG 02 17 37.14752 -05 13 29.5242   23.372 22.054 21.102 19.12 ~ 51 0
17 SL2S J021801-080247 gLe 02 18 01.0 -08 02 47           ~ 8 0
18 SL2S J021801-080247 source G 02 18 01.3 -08 02 47           ~ 2 0
19 SL2S J021902-082934 gLe 02 19 02.0 -08 29 34           ~ 14 0
20 SL2S J021902-082934 source G 02 19 02.1 -08 29 35           ~ 3 0
21 SL2S J022046-094927 gLe 02 20 46.0 -09 49 27           ~ 6 0
22 SL2S J022046-094927 source G 02 20 46.1 -09 49 28           ~ 2 0
23 SL2S J022056-063934 gLe 02 20 56.0 -06 39 34           ~ 6 0
24 SL2S J022056-063934 source G 02 20 56.6 -06 39 34           ~ 1 0
25 SDSS J022346.15-053418.5 GiC 02 23 46.139 -05 34 18.44           ~ 13 0
26 SL2S J022346-053418 source G 02 23 46.2 -05 34 18           ~ 1 0
27 SL2S J022357-065142 source G 02 23 57.9 -06 51 43           ~ 1 0
28 GAMA J022357.94-065142.6 gLe 02 23 57.94 -06 51 42.8           ~ 7 0
29 FIRST J022511.0-045433 rG 02 25 11.0432107507 -04 54 33.577072969           ~ 21 2
30 SL2S J022511-045433 source LeG 02 25 11.0432107512 -04 54 33.577072956           ~ 7 0
31 SL2S J022610-042011 gLe 02 26 10.0 -04 20 11           ~ 17 0
32 SL2S J022610-042011 source G 02 26 10.0 -04 20 11           ~ 5 0
33 SL2S J022648-040610 gLe 02 26 48.0 -04 06 10           ~ 9 0
34 SL2S J022648-090421 gLe 02 26 48.0 -09 04 21           ~ 6 0
35 SL2S J022648-040610 source G 02 26 48.4 -04 06 10           ~ 1 0
36 GAMA J022648.56-090421.2 G 02 26 48.57 -09 04 21.4           ~ 2 0
37 SL2S J022708-065445 gLe 02 27 08.0 -06 54 45           ~ 3 0
38 SL2S J022708-065445 source G 02 27 08.8 -06 54 45           ~ 1 0
39 SL2S J023251-040823 source G 02 32 51.6 -04 08 24           ~ 3 0
40 GAMA J023251.57-040823.8 gLe 02 32 51.58 -04 08 23.9           ~ 17 0
41 SL2S J023307-043838 gLe 02 33 07.050 -04 38 38.21           ~ 7 0
42 SL2S J023307-043838 source G 02 33 07.1 -04 38 38           ~ 2 0
43 SL2S J084847-035103 gLe 08 48 47.0 -03 51 03           ~ 10 0
44 SL2S J084847-035103 source G 08 48 47.2 -03 51 04           ~ 3 0
45 SL2S J084909-041226 gLe 08 49 09.0 -04 12 26           ~ 13 0
46 SL2S J084909-041226 source G 08 49 09.5 -04 12 27           ~ 3 0
47 SL2S J084934-043352 gLe 08 49 34.0 -04 33 52           ~ 4 0
48 SL2S J084934-043352 source G 08 49 34.2 -04 33 53           ~ 1 0
49 SL2S J084959-025142 gLe 08 49 59.0 -02 51 42           ~ 11 0
50 SL2S J084959-025142 source G 08 49 59.8 -02 51 43           ~ 2 0
51 SL2S J085019-034710 gLe 08 50 19.0 -03 47 10           ~ 7 0
52 SL2S J085019-034710 source G 08 50 19.1 -03 47 11           ~ 1 0
53 SL2S J085327-023745 gLe 08 53 27.0 -02 37 45           ~ 3 0
54 SL2S J085327-023745 source G 08 53 27.7 -02 37 45           ~ 1 0
55 SL2S J085540-014730 gLe 08 55 40.0 -01 47 30           ~ 10 0
56 SL2S J085540-014730 source G 08 55 40.1 -01 47 30           ~ 3 0
57 SL2S J085559-040917 source G 08 55 59.9 -04 09 18           ~ 1 0
58 SL2S J085559-040917 gLe 08 55 59.920 -04 09 17.76           ~ 7 0
59 SL2S J090106-025906 gLe 09 01 06.0 -02 59 06           ~ 6 0
60 SL2S J090106-025906 source G 09 01 06.0 -02 59 07           ~ 2 0
61 SL2S J090407-005952 source G 09 04 07.9 -00 59 53           ~ 3 0
62 SL2S J090407-005952 gLe 09 04 07.970 -00 59 52.85           ~ 15 0
63 SL2S J095921+020638 gLe 09 59 21.0 +02 06 38           ~ 11 0
64 SL2S J095921+020638 source G 09 59 21.8 +02 06 39           ~ 2 0
65 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 3639 0
66 SL2S J135847+545913 source G 13 58 47.0 +54 59 13           ~ 1 0
67 SL2S J135847+545913 gLe 13 58 47.0 +54 59 13           ~ 6 0
68 SL2S J135949+553550 gLe 13 59 49.0 +55 35 50           ~ 11 0
69 SL2S J135949+553550 source G 13 59 49.6 +55 35 50           ~ 3 0
70 SL2S J140123+555705 gLe 14 01 23.0 +55 57 05           ~ 6 0
71 SL2S J140123+555705 source G 14 01 23.2 +55 57 05           ~ 1 0
72 SL2S J140156+554446 source G 14 01 56.4 +55 44 47           ~ 1 0
73 SL2S J140156+554446 gLe 14 01 56.390 +55 44 46.78           ~ 7 0
74 SL2S J140221+550534 gLe 14 02 21.0 +55 05 34           ~ 4 0
75 SL2S J140221+550534 source G 14 02 21.5 +55 05 35           ~ 1 0
76 SL2S J140454+520024 source G 14 04 54.5 +52 00 24           ~ 3 0
77 SL2S J140454+520024 gLe 14 04 54.460 +52 00 24.70           ~ 10 0
78 SL2S J140533+550231 gLe 14 05 33.0 +55 02 31           ~ 3 0
79 SL2S J140533+550231 source G 14 05 33.8 +55 02 31           ~ 1 0
80 SL2S J140546+524311 gLe 14 05 46.0 +52 43 11           ~ 11 0
81 SL2S J140546+524311 source G 14 05 46.2 +52 43 11           ~ 3 0
82 SL2S J140614+520252 gLe 14 06 14.0 +52 02 52           ~ 6 0
83 SL2S J140614+520253 source G 14 06 14.3 +52 02 54           ~ 1 0
84 SL2S J140650+522619 gLe 14 06 50.0 +52 26 19           ~ 12 0
85 SL2S J140650+522619 source G 14 06 50.3 +52 26 19           ~ 3 0
86 SL2S J141137+565119 source G 14 11 37.0 +56 51 19           ~ 5 0
87 SL2S J141137+565119 gLe 14 11 37.0 +56 51 19           ~ 15 0
88 NAME Extended Groth Strip reg 14 19 +52.8           ~ 1023 0
89 DES J141917.24+511728.7 GiC 14 19 17.236 +51 17 28.55           ~ 6 0
90 SL2S J141917+511729 source G 14 19 17.3 +51 17 29           ~ 1 0
91 SL2S J142003+523137 gLe 14 20 03.0 +52 31 37           ~ 4 0
92 SL2S J142003+523137 source G 14 20 03.4 +52 31 38           ~ 1 0
93 SL2S J142031+525822 source G 14 20 31.8 +52 58 22           ~ 1 0
94 [TCB2007] 13025503 AGN 14 20 31.89 +52 58 22.3   21.81   19.577 18.953 ~ 13 0
95 SL2S J142059+563007 gLe 14 20 59.0 +56 30 07           ~ 13 0
96 SL2S J142059+563007 source G 14 20 59.9 +56 30 08           ~ 3 0
97 SL2S J142321+572243 gLe 14 23 21.0 +57 22 43           ~ 2 0
98 SL2S J142321+572243 source G 14 23 21.9 +57 22 43           ~ 1 0
99 SL2S J142731+551645 gLe 14 27 31.0 +55 16 45           ~ 5 0
100 SL2S J142731+551645 source G 14 27 31.3 +55 16 45           ~ 2 0
101 SL2S J220329+020518 source G 22 03 29.0 +02 05 19           ~ 4 0
102 SL2S J220329+020518 gLe 22 03 29.030 +02 05 18.89           ~ 15 0
103 SL2S J220506+014703 source G 22 05 06.9 +01 47 04           ~ 3 0
104 HSCS J220506+014703 gLe 22 05 06.920 +01 47 03.71           ~ 13 0
105 SL2S J220629+005728 gLe 22 06 29.0 +00 57 28           ~ 6 0
106 SL2S J220629+005728 source G 22 06 29.4 +00 57 29           ~ 1 0
107 SL2S J221045-005918 gLe 22 10 45.4 -00 59 18           ~ 1 0
108 SL2S J221045-005918 source G 22 10 45.4 -00 59 18           ~ 1 0
109 SL2S J221326-000946 gLe 22 13 26.0 -00 09 46           ~ 12 0
110 SL2S J221326-000946 source G 22 13 26.2 -00 09 46           ~ 1 0
111 SL2S J221606-175131 gLe 22 16 06.0 -17 51 31           ~ 3 0
112 SL2S J221606-175131 source G 22 16 06.9 -17 51 32           ~ 1 0
113 SL2S J221852+014038 gLe 22 18 52.0 +01 40 38           ~ 4 0
114 SL2S J221852+014038 source G 22 18 52.6 +01 40 39           ~ 1 0
115 SL2S J221929-001743 gLe 22 19 29.0 -00 17 43           ~ 9 0
116 SL2S J221929-001743 source G 22 19 29.0 -00 17 43           ~ 3 0
117 SL2S J222012+010606 gLe 22 20 12.0 +01 06 06           ~ 6 0
118 SL2S J222012+010606 source G 22 20 12.9 +01 06 06           ~ 1 0
119 SL2S J222148+011542 gLe 22 21 48.0 +01 15 42           ~ 12 0
120 SL2S J222148+011542 source G 22 21 48.8 +01 15 43           ~ 3 0
121 SL2S J222217+001202 gLe 22 22 17.0 +00 12 02           ~ 6 0
122 SL2S J222217+001202 source G 22 22 17.6 +00 12 03           ~ 1 0

To bookmark this query, right click on this link: simbad:objects in 2014ApJ...785..144G and select 'bookmark this link' or equivalent in the popup menu