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CASTLES Survey

Welcome to the web site for the CfA-Arizona Space Telescope LEns Survey of gravitational lenses. We will provide information and data on gravitational lens systems. A tarball of FITS images can be downloaded from here. As a courtesy, please cite this website (C.S. Kochanek, E.E. Falco, C. Impey, J. Lehar, B. McLeod, H.-W. Rix) if you use it in your research. We reduced our NICMOS data with our own IRAF software, called nicred.

For information about individual lenses, click on the appropriate name in the data table below.
 
References Papers About CASTLES

Download C.R. Keeton's Lens Modeling Software: Get the software and manual.


Download the CASTLES poster here .

Summary of Multiply Imaged Systems

See also the Summary of Binary Quasars table below.
# Image Lens Name G zs zl RA (J2000) Dec (J2000) E(B-V) ms (mag) ml (mag) FGHz (mJy) Nim size (") dt (days) sigma (km/s)
1 Q0047-2808 A 3.60 0.48 00:49:41.89 -27:52:25.7 0.016   I=20.05   4ER 2.7   229±15
2 HE0047-1756 A 1.66 0.41 00:50:27.83 -17:40:8.8 0.022 I=16.53/2 I=18.97   2 1.44    
3 HST01247+0352 C     01:24:44.4 +03:52:00 0.029 I=24.13/2 I=21.86   2 2.20    
4 HST01248+0351 C     01:24:45.6 +03:51:06 0.029       2 0.74    
5 B0128+437 B 3.124   01:31:13.405 +43:58:13.14 0.082     F5=48 4 0.55    
6 PMNJ0134-0931 A 2.216 0.77 01:34:35.67 -09:31:02.9 0.031 I=18.96/4 I=19.31 F5=529 5R 0.73    
7 Q0142-100 A 2.72 0.49 01:45:16.5 -09:45:17 0.031 I=16.47/2 I=18.72 F5~1 2 2.24    
8 QJ0158-4325 A 1.29 0.317 01:58:41.44 -43:25:04.20 0.015 I=17.39/2 I=18.91 F8<0.2 2 1.22    
9 B0218+357 A 0.96 0.68 02:21:05.483 +35:56:13.78 0.068 I=19.28/2 I=20.06 F5=1209 2ER 0.34 10.5±0.4  
10 HE0230-2130 A 2.162 0.52 02:32:33.1 -21:17:26 0.022 I=18.00/4 I=20.39   4 2.05    
11 SDSS0246-0825 A 1.68   02:46:34.11 -08:25:36.2 0.026 I=16.98/2 I=20.82   2 1.19    
12 CFRS03.1077 B 2.941 0.938 03:02:30.9 +00:06:02.1 0.098   I=20.36   2ER 2.1   256±19
13 J0332-2756 A   0.617 03:32:38.22 -27:56:52.9 0.008 V=-1.95/6 V=20.74   2E 3.64    
14 MG0414+0534 A 2.64 0.96 04:14:37.73 +05:34:44.3 0.303 I=19.62/4 I=20.91 F5=977 4E 2.40    
15 HE0435-1223 A 1.689 0.46 04:38:14.9 -12:17:14.4 0.059 i=16.84/4 i=18.05   4 2.42 14.4±0.8  
16 B0445+123 B   0.557 04:48:21.99 +12:27:55.41 0.431 I=22.80/2 I=20.60 F5=29 2 1.35    
17 HE0512-3329 A 1.57 (0.93) 05:14:10.78 -33:26:22.50 0.024 I=16.27/2 I=20.85   2 0.65    
18 B0631+519 A   0.09/0.62 06:35:12.31 +51:57:01.8 0.092     F8=45 2R 1.16    
19 B0712+472 A 1.34 0.41 07:16:03.58 +47:08:50.0 0.113 I=22.42/4 I=19.56 F5=38 4 1.46    
20 B0739+366 A     07:42:51.2 +36:34:43.7 0.076 I=25.25/2 I=21.91 F5=25 2 0.53    
21 SDSS0746+4403 A 2.00   07:46:53.03 +44:03:51.3   I=18.34/2 I=19.62   2 1.11    
22 MG0751+2716 A 3.20 0.35 07:51:41.46 +27:16:31.35 0.034   I=21.26 F5=202 R 0.7    
23 SDSS0806+2006 A 1.540 0.573 08:06:23.70 +20:06:31.9 0.034 I=17.93/2 I=20.16   2 1.40    
24 HS0810+2554 A 1.50   08:13:31.3 +25:45:03.2 0.040 I=15.03/4 I=16.63   4 0.96    
25 HS0818+1227 A 3.115 0.39 08:21:39.1 +12:17:29 0.031 I=18.54/2 I=19.07   2 2.83    
26 APM08279+5255 A 3.87   08:31:41.59 +52:45:17.0 0.050 I=14.55/3     3 0.38    
27 B0850+054 A 1.14/3.93? 0.59 08:52:53.58 +05:15:15.3 0.062 I=23.15/1 I=21.35 F5=68 2E 0.68    
28 SDSS0903+5028 A 3.605 0.388 09:03:34.92 +50:28:19.2 0.025 I=18.51/2 I=19.93   2 2.99    
29 RXJ0911+0551 A 2.80 0.77 09:11:27.50 +05:50:52.0 0.045 I=17.39/4 I=20.47   4 2.47 146.0±4.0  
30 SBS0909+523 A 1.38 0.83 09:13:01.05 +52:59:28.83 0.015 I=15.65/2 I=18.85   2 1.17 45.0±5.5  
31 RXJ0921+4529 B 1.65 0.31 09:21:12.81 +45:29:04.4 0.018 I=17.74/3 I=20.24   2 6.97    
32 SDSS0924+0219 A 1.524 0.39 09:24:55.87 +02:19:24.9 0.055 i=18.18/4 i=20.78   4 1.75    
33 FBQ0951+2635 A 1.24 (0.24) 09:51:22.57 +26:35:14.1 0.022 I=16.39/2 I=19.67 F5=1.7 2 1.11 16.0±2.0  
34 BRI0952-0115 A 4.50 0.632 09:55:00.01 -01:30:05.0 0.063 I=18.27/2 I=21.21   2 1.00    
35 Q0957+561 A 1.41 0.36 10:01:20.78 +55:53:49.4 0.009 I=15.99/2 I=17.12 F5=65.6 2E 6.26 417.0±3.0 288±9
36 SDSS1001+5027 A 1.84   10:01:28.61 +50:27:56.9 0.012 I=16.64/2     2 2.86    
37 J1004+1229 A 2.65 0.95 10:04:24.9 +12:29:22.3 0.036 I=19.65/2 I=21.60 F1.7=7 2 1.54    
38 SDSS1004+4112 A 1.734 0.68 10:04:34.91 +41:12:42.8 0.013 i=17.53/4 i=18.42   4 15.99 821.6±2.1  
39 SDSS1011+0143 A 2.701 0.331 10:11:29.49 +01:43:23.3   UNKNOWN=22.43/4 UNKNOWN=19.86   4 3.67    
40 LBQS1009-0252 A 2.74 0.87 10:12:15.71 -03:07:02.0 0.034 I=17.80/2 I=21.94   2 1.54    
41 Q1017-207 A 2.55 (0.78) 10:17:24.13 -20:47:00.4 0.046 I=16.78/2 I=21.82   2 0.85    
42 SDSS1021+4913 A 1.72   10:21:11.02 +49:13:30.4 0.009       2 1.14    
43 FSC10214+4724 A 2.29 (0.75) 10:24:34.6 +47:09:11 0.012   I=20.40   2E 1.59    
44 SDSS1029+2623 A 2.197 0.55 10:29:13.35 +26:23:31.8 0.022       4 22.5 746.±10.  
45 B1030+074 A 1.54 0.60 10:33:34.08 +07:11:25.5 0.022 I=19.41/2 I=20.02   2 1.65    
46 HE1104-1805 A 2.32 0.73 11:06:33.45 -18:21:24.2 0.056 I=16.17/2 I=20.01   2 3.19 152.2±3.0  
47 PG1115+080 A 1.72 0.31 11:18:17.00 +07:45:57.7 0.041 I=15.62/4 I=18.92   4 2.32 25.0±2.0 281±25
48 B1127+385 A     11:30:00.13 +38:12:03.1 0.027 I=25.62/2 I=23.00   2 0.74    
49 RXJ1131-1231 A 0.658 0.295 11:31:51.6 -12:31:57 0.035 I=16.74/5 I=17.88   4 3.80 87±8  
50 MG1131+0456 A   0.844 11:31:56.48 +04:55:49.8 0.036   I=21.21 F5=205 2R 2.1    
51 SDSS1138+0314 A 2.44 0.45 11:38:03.70 +03:14:58.0 0.019 I=18.43/4 I=20.04   4 1.34    
52 SDSS1155+6346 A 2.89 0.176 11:55:17.35 +63:46:22.0 0.014 I=17.67/2 I=17.82   2 1.95    
53 B1152+200 A 1.019 0.439 11:55:18.3 +19:39:42.2 0.031 I=16.53/2 I=19.26 F5=76 2 1.59    
54 SDSS1206+4332 A 1.79   12:06:29.65 +43:32:17.6 0.014       2 2.90    
55 Q1208+101 B 3.80   12:10:57.16 +09:54:25.6 0.022 I=16.96/2     2 0.48    
56 SDSS1226-0006 A 1.12 0.52 12:26:08.10 -00:06:02.0 0.024 I=18.32/2 I=19.72   2 1.26    
57 HST12368+6212 C     12:36:49.0 +62:12:22 0.012       2E 1.17    
58 HST12531-2914 A   (0.69) 12:53:06.70 -29:14:30.0 0.079 I=24.70/4 I=21.83   4 1.23    
59 SDSS1332+0347 A 1.445 0.191 13:32:22.62 +03:47:39.9 0.026 i=18.70/2 i=18.64   2 1.14    
60 LBQS1333+0113 A 1.57   13:35:34.79 +01:18:05.5 0.024 i=17.26/2 i=20.05   2 1.63    
61 SDSS1353+1138 A 1.629 0.3 13:53:06.35 +11:38:04.7 0.026 i=16.44/2 i=18.77   2 1.41    
62 Q1355-2257 A 1.37 (0.48) 13:55:43.38 -22:57:22.9 0.072 I=16.94/2 I=19.04   2 1.23    
63 B1359+154 A 3.235   14:01:35.55 +15:13:25.6 0.019 I=22.62/6 I=22.68 F5=66 6 1.71    
64 SDSS1402+6321 A 0.48 0.20 14:02:28.22 +63:21:33.3 0.017       4 1.35   267±17
65 SDSS1406+6126 A 2.13 0.27 14:06:24.82 +61:26:40.9 0.015 I=18.88/2 I=18.12   4 1.98    
66 HST14113+5211 A 2.81 0.46 14:11:19.60 +52:11:29.0 0.016 I=24.14/4 I=19.99   4 1.80    
67 H1413+117 A 2.55   14:15:46.40 11:29:41.4 0.024 I=16.44/4 H=18.61 F5~0.1 4 1.35    
68 HST14164+5215 C     14:16:25.2 +52:14:31 0.013 I=22.75/2 I=19.91   2 2.24    
69 HST14176+5226 A 3.40 0.81 14:17:36.51 +52:26:40.0 0.007 I=23.41/4 I=19.77   4 2.83   230±14
70 B1422+231 A 3.62 0.34 14:24:38.09 +22:56:00.6 0.048 I=14.81/4 I=19.66 F5=557 4E 1.68 8.2±2.0  
71 SBS1520+530 A 1.86 0.72 15:21:44.83 +52:54:48.6 0.016 I=17.61/2 I=20.16   2 1.59 129.0±3.0  
72 HST15433+5352 A 2.092 0.497 15:43:20.9 +53:51:52 0.012       2R 1.18   108±14
73 MG1549+3047 A 1.17 0.11 15:49:12.37 +30:47:16.6 0.029 H=20.52/1 I=16.70 F5=185 R 1.7   227±18
74 B1555+375 A     15:57:11.93 +37:21:35.9 0.022 H=20.65/2 H=20.01 F5=35 4 0.42    
75 B1600+434 A 1.59 0.41 16:01:40.45 +43:16:47.8 0.013 I=20.87/2 I=20.78 F5=132 2 1.40 51.0±2.0  
76 B1608+656 A 1.39 0.63 16:09:13.96 +65:32:29.0 0.031   I=19.02 F5=73.2 4 2.27 77.0±1.5 247±35
77 HST16302+8230 C     16:30:12.9 +82:29:59 0.087       2R 1.47    
78 HST16309+8230 C     16:30:52.7 +82:30:12 0.087       2E 0.76    
79 PMNJ1632-0033 B 3.424   16:32:57.68 -00:33:21.1 0.098 I=20.68/2 I=23.41 F5=227 2R 1.47    
80 FBQ1633+3134 B 1.52   16:33:48.99 +31:34:11.90 0.030 I=16.59/2 I=18.26   2 0.75    
81 SDSS1650+4251 B 1.54   16:50:43.44 +42:51:45.0 0.016 I=16.98/2 I=20.5   2 1.23 49.5±1.9  
82 MG1654+1346 A 1.74 0.25 16:54:41.83 +13:46:22.0 0.061 I=20.18/1 I=17.90 F5=130.0 R 2.1    
83 HST18078+4600 C     18:07:46.7 +45:59:56 0.037       2E 0.91    
84 PKS1830-211 A 2.51 0.89 18:33:39.94 -21:03:39.7 0.464 I=22.27/2 I=21.42 F2~10^4 2ER 0.99 26.0±4.0  
85 PMNJ1838-3427 A 2.78   18:38:28.5 -34:27:41.6 0.125 I=19.10/2 I=21.22 F5=213 2R 0.99    
86 B1933+503 A 2.63 0.76 19:34:30.95 +50:25:23.6 0.095   I=20.24 F5=59 10 1.00    
87 B1938+666 A 2.059 0.881 19:38:25.19 +66:48:52.2 0.121   I=21.46 F5=316 R 1.0    
88 PMNJ2004-1349 A     20:04:07.07 -13:49:30.7 0.202 I=21.93/2 I=21.61 F5=34 2R 1.18    
89 MG2016+112 A 3.27 1.01 20:19:18.15 +11:27:08.3 0.235 I=21.51/3 I=21.95 F5=84.6 2E 3.52   304±27
90 WFI2026-4536 A 2.23   20:26:10.43 -45:36:27.1 0.041 i=16.18/4 i=   4 1.34    
91 WFI2033-4723 A 1.66 0.66 20:33:42.08 -47:23:43.0 0.047 i=17.59/4 i=19.71   4 2.33    
92 B2045+265 A 1.28 0.87 20:47:20.35 +26:44:01.2 0.232 I=22.02/3 I=21.06   4 2.74    
93 B2108+213 A     21:10:54.02 +21:31:00.7 0.161 I=20.92/2   F8=19 2 4.57    
94 B2114+022 B 0.59 0.32 21:16:50.75 +02:25:46.9 0.072   I=18.63 F5=141 2+2? 1.31    
95 Q2138-431 A 1.64   21:41:16.28 -42:57:09.6 0.016 J=18.02/2 J=20.68   2 4.42    
96 HE2149-2745 A 2.03 0.50 21:52:07.44 -27:31:50.2 0.032 I=16.29/2 I=19.56   2 1.70 103.0±12.0  
97 CY2201-3201 A 3.9 0.32 22:01:32.8 -32:01:44.0 0.028       2 0.83   130±20
98 HDFS2232509-603243 C     22:32:50.9 -60:32:43.0 0.028       4?E 0.9    
99 Q2237+030 A 1.69 0.04 22:40:30.34 +03:21:28.8 0.071 I=15.16/4 I=14.15 F5=0.336 4 1.78   215±30
100 B2319+052 A   0.62 23:21:40.8 +05:27:36.4 0.064   I=20.71 F5=32 2 1.36    
101 PSS2322+1944 B 4.12   23:22:07.2 +19:44:23 0.044 I=17.92/2 I=21.91   2 1.49    

Explanation of Table Entries


IMAGE:Shows a postage stamp image of the system when available.
LENS NAME:The standard name for the lens. Clicking on the name takes you to a page
with further information on the system.
G: A grade for the likelihood that the object is a lens: A=I'd bet my life, B=I'd bet your life,
and C=I'd bet your life and you should worry.
SOURCE REDSHIFT:zs is the source redshift.
LENS REDSHIFT:zl is the lens redshift. If the lens redshift is enclosed in parentheses,
the lens redshift has been estimated photometrically.
E(B-V):The Galactic extinction for the lens based on Schlegel, Finkbeiner and Davis (1998)
SOURCE MAGNITUDE:A rough, total optical magnitude for the lensed sources. Magnitudes derived
from the CASTLES survey are shown in red.
LENS MAGNITUDE:A rough, total optical magnitude for the lens galaxy. Magnitudes derived
from the CASTLES survey are shown in red.
RADIO FLUX:Fn is the radio flux at a frequency of n GHz.
NUMBER OF IMAGES:Nim is the number of images corresponding to each source component.
The flag E means extended and the flag R means there is an Einstein ring.
SIZE ESTIMATES:The size estimates, which are meant to be twice the average (monopole) Einstein radius,
are color coded by how they were derived. Except for the numbers from the literature, which may be only
rough estimates, the formal errors in the estimates are usually under 10 mas. In most cases, only the 4-image
lenses show significant differences between the definitions.
BLACK = estimate from the literature
BLUE = the maximum separation of any pair of images. This can be misleading for highly sheared lenses.
GREEN = twice the average distance of the images from the lens center.
RED = twice the critical radius of a naive SIS plus external shear model for the positions.
DT:Is the measured time delay for the system in days. Where more than one delay is measured, only the longest delay is shown.
SIGMA:Is the velocity dispersion of the primary lens galaxy in km/s.

Summary of Binary Quasars

For each system we list a grade of reliability (A=systems we are sure are binary quasars, B=systems that probably are binary quasars), the source redshifts (zs), the foreground Galactic extinction (E(B-V)), the total magnitude of the two quasars, the magnitude difference between the two quasars (ms), the number of images, and the image separation in arc seconds. Clicking on an individual lens will lead to pages containing more information and images.

This table currently contains data from the literature, but the entries will be updated as CASTLES survey data comes in. New results from this survey will be shown in red.
 

# Image Binary Name G zs RA (J2000) Dec (J2000) E(B-V) mtot (mag) mdiff (mag) FGHz (mJy) size (")
1 LBQS0015+0239 B 2.45 00:18:11.37 +02:56:39.4 0.030       2.2
2 MG0023+171 B 0.95 00:25:37.09 +17:28:02.5 0.054       4.8
3 LBQS0103-2753 B 0.85 01:05:34.74 -27:36:58.5 0.020       0.3
4 Q0151+048 A 1.91 01:53:53.87 +05:02:58.7 0.043       3.3
5 QJ0240-343 B 1.41 02:40:07.73 -34:34:19.8 0.025       6.05
6 Q0252-3249 B 2.24 02:52:57.85 -32:49.10.1 0.033 I=17.48/2 I=1.85 F5<0.9 2.09
7 B0827+525 B 2.064 08:31:05.37 +52:25:20.4 0.042 H=19.53/2 H=3.00 F5=45 2.82
8 Q1120+0195 B 1.47 11:23:20.57 +01:37:48.5 0.037       6.5
9 PKS1145-071 A 1.35 11:47:51.56 -07:24:41.6 0.042       4.2
10 HS1216+5032 B 1.45 12:16:13.4 +50:32:14.0 0.022       9.1
11 Q1343+2650 A 2.03 13:45:44.06 +26:25:05.9 0.014       9.5
12 LBQS1429-008 B 2.08 14:32:29.07 -01:06:18.0 0.046 H=15.79/2 H=3.63   5.11
13 Q1634+267 B 1.96 16:37:01.13 +26:36:09.2 0.072       3.8
14 J1643+3156 A 0.586 16:43:11.33 +31:56:18.3 0.029 K=16.03/2 K=0.40   2.38
15 LBQS2153-2056 B 1.85 21:55:53.60 -20:41:45.2 0.029       7.8
16 MGC2214+3550 A 0.88 22:14:57.04 +35:51:25.5 0.125       3.0
17 Q2345+007 B 2.15 23:48:19.40 +00:57:20.0 0.025       7.3