This webpage contains data on the reflectivity measurements of the WHT primary mirror.

Reflectivity results - WHT Primary Mirror

2008

Date

Time

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

RMS (Å)

File

Notes
23/07/2008   8.097E-03 2.732E-03 0.844 67.900 20080723WHT.pdf After CO2 cleaning, telescope in AP3 position
23/07/2008   1.246E-02 5.578E-03 0.815 83.424 20080723WHT.pdf Before CO2 cleaning, telescope in AP3 position
22/07/2008   1.124E-02 5.183E-03 0.808 79.591 20080722WHT.pdf Reflectivity measurement when telescope at zenith
03/06/2008   1.196E-02 5.751E-03 0.821 82.051 20080603WHT.pdf After CO2 cleaning, telescope in AP3 position
03/06/2008   1.496E-02 8.387E-03 0.775 94.333 20080603WHT.pdf Before CO2 cleaning, telescope in AP3 position
26/02/2008   5.531E-03 1.539E-03 0.864 57.079 20080226WHT.pdf After CO2 cleaning, telescope in AP3 position
26/02/2008   1.076E-02 5.164E-03 0.830 76.610 20080226WHT.pdf Before CO2 cleaning, telescope in AP3 position
13/02/2008   1.106E-02 5.214E-03 0.838 77.365 20080213WHT.pdf Visual inspection and reflectivity measurement

2007

Date

Time

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

RMS (Å)

File

Notes
29/10/2007   4.393E-03 1.585E-03 0.867 49.140 20071029WHT.pdf Visual inspection and reflectivity measurement
04/10/2007   4.725E-03 1.478E-03 0.877 49.785 20071004WHT.pdf After CO2 cleaning, telescope in AP3 position
04/10/2007   7.180E-03 3.482E-03 0.841 61.996 20071004WHT.pdf Before CO2 cleaning, telescope in AP3 position
24/07/2007   3.358E-03 1.231E-03 0.906 41.227 20070724WHT.pdf After CO2 cleaning, telescope in AP3 position
24/07/2007   6.447E-03 4.086E-03 0.870 57.159 20070724WHT.pdf Before CO2 cleaning, telescope in AP3 position
22/05/2007   3.792E-03 2.276E-03 0.872 44.026 20070522WHT.pdf After visual inspection of the primary mirror
24/04/2007   2.398E-03 1.095E-03 0.873 36.612 20070424WHT.pdf After visual inspection of the primary mirror
13/04/2007   3.363E-03 1.037E-04 0.873 42.345 20070413WHT.pdf After CO2 cleaning, telescope in AP3 position
13/04/2007   3.716E-03 1.989E-03 0.872 43.444 20070413WHT.pdf Before CO2 cleaning, telescope in AP3 position
30/01/2007   1.241E-03 8.510E-05 0.885 59.373 20070129-30WHTALU.pdf After aluminising
29/01/2007   1.227E-02 4.513E-03 0.833 82.220 20070129-30WHTALU.pdf Before aluminising
08/01/2007   5.196E-03 8.768E-04 0.823 65.094 20070108WHT.pdf After CO2 cleaning, telescope in AP3 position
08/01/2007   6.829E-03 2.096E-03 0.809 65.078 20070108WHT.pdf Before CO2 cleaning, telescope in AP3 position

2006

Date

Time

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

RMS (Å)

File

Notes
20/12/2006   5.078E-03 1.012E-03 0.796 61.050 20061220WHT.pdf

Measurements when telescope in AP3

05/12/2006   5.055E-03 7.967E-04 0.832 64.93 20061205WHT2.pdf

Measurements when telescope in AP3

05/12/2006   6.365E-03 1.386E-03 0.862 65.947 20061205WHT1.pdf

Measurement when telescope in zenith position, on the 4 ports
30/11/2006   3.497E-03 6.261E-04 0.783 53.055 20061130WHT.pdf

After vapour washing (new technique). Right half again as seen from AP3.

30/11/2006   7.824E-03 2.002E-03 0.756 72.614 20061130WHT.pdf Before vapour washing (new technique). Right half again as seen from AP3.
29/11/2006   4.660E-03 9.275E-04 0.834 58.593 20061129WHT.pdf After vapour washing (new technique). Left half of the mirror as seen from AP3.
29/11/2006   1.153E-02 4.402E-03 0.804 81.811 20061129WHT.pdf Before vapour washing (new technique). Left half of the mirror as seen from AP3.
28/11/2006   7.978E-03 1.546E-03 0.838 75.436 20061128WHT.pdf After vapour washing (new technique). Right half of the mirror as seen from AP3.
28/11/2006   1.145E-02 4.289E-03 0.808 81.560 20061128WHT.pdf Before vapour washing (new technique). Right half of the mirror as seen from AP3. 
02/08/2006
 
10:59:09
 
6.07E-03
 
1.76E-03
 
0.8718
 
59.395
 
WHTPA308.PRN
 
After CO2 Cleaning
 
02/08/2006
 
10:01:31
 
9.37E-03
 
4.29E-03
 
0.8525
 
70.174
 
WHTPB308.PRN
 
Before CO2 Cleaning
 
21/06/2006
 
11:27:07
 
5.47E-03
 
1.51E-03
 
0.8508
 
57.225
 
WHTPA216.PRN
 
After CO2 Cleaning
 
21/06/2006
 
09:04:30
 
6.99E-03
 
3.00E-03
 
0.8508
 
61.519
 
WHTPB216.PRN
 
Before CO2 Cleaning
 
27/04/2006
 
13:50:59
 
5.56E-03
 
1.35E-03
 
0.8649
 
59.180
 
WHTPA274.PRN
 
After CO2 Cleaning
 
27/04/2006
 
08:04:28
 
8.98E-03
 
4.21E-03
 
0.8440
 
69.391
 
WHTPB274.PRN
 
Before CO2 Cleaning
 
07/03/2006
 
13:39:28
 
5.61E-03
 
1.57E-03
 
0.8663
 
58.627
 
WHTPA703.PRN
 
After CO2 Cleaning
 
07/03/2006
 
09:24:51
 
8.49E-03
 
3.58E-03
 
0.8588
 
66.303
 
WHTPB703.PRN
 
Before CO2 Cleaning
 
25/01/2006
 
13:12:31
 
8.84E-03
 
2.46E-03
 
0.8763
 
72.033
 
WHTP251.PRN
 
 

2005

Date

Time

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

RMS (Å)

File

Notes

 
16/09/2005
           
 

CO2 Cleaned 16/09/2005 no reflectivity data

 
11/08/2005
           
 

CO2 Cleaned 11/08/2005 no reflectivity data

 
28/06/2005
           
 

CO2 Cleaned 28/06/2005 no reflectivity data

 
20/04/2005
 
11:05:31
 
4.75E-03
 
2.76E-03
 
0.8309
 
50.506

WHTP2004.PRN

 
Before CO2 cleaning
 
10/03/2005
 
13:29:50
 
1.86E-03
 
5.28E-04
 
0.8493
 
36.528

WHTPA103.PRN

 
After CO2 cleaning
 
10/03/2005
 
10:37:00
 
3.34E-03
 
1.40E-03
 
0.8033
 
43.879

WHTPB103.PRN

 
Before CO2 cleaning

2004

Date

Time

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

RMS (Å)

File

Notes

 
30/11/2004
 
15:15:59
 
1.18E-03
 
1.41E-04
 
0.8707
 
49.458
 
WHTPA29N.PRN
 
After aluminising
 
29/11/2004
 
17:45:35
 
1.45E-02
 
3.27E-03
 
0.8547
 
98.507
 
WHTPB29N.PRN
 
Before aluminising
 
27/07/2004
 
08:18:14
 
1.04E-02
 
5.38E-03
 
0.8654
 
73.226
 
WHTPB277.PRN
 
Before CO2 cleaning
 
15/06/2004
 
12:39:57
 
6.31E-03
 
1.87E-03
 
0.8825
 
59.940
 
WHTPA156.PRN
 
Before CO2 cleaning
 
15/06/2004
 
10:18:23
 
9.76E-03
 
4.73E-03
 
0.8465
 
72.042
 
WHTPB156.PRN
 
Before CO2 cleaning
 
26/04/2004
 
10:47:27
 
7.20E-03
 
2.35E-03
 
0.8357
 
65.022
 
WHTPA264.PRN
 
After CO2 cleaning
 
26/04/2004
 
09:11:25
 
1.14E-02
 
6.06E-03
 
0.8249
 
78.520
 
WHTPB264.PRN
 
Before CO2 cleaning
 
11/02/2004
 
14:20:08
 
5.17E-03
 
1.49E-03
 
0.8580
 
55.240
 
WHTPA112.PRN
 
After CO2 cleaning
 
11/02/2004
 
10:25:32
 
9.29E-03
 
4.92E-03
 
0.8236
 
70.931
 
WHTPB112.PRN
 
Before CO2 cleaning
 
15/01/2004
 
05:29:32
 
6.53E-03
 
2.76E-03
 
0.8740
 
58.500
 
WHTP1501.PRN
 
After CO2 cleaning
 
15/01/2004
 
05:29:32
 
6.53E-03
 
2.76E-03
 
0.8736
 
58.491
 
WHTP1501.PRN
 
Before CO2 cleaning

2003

Date

Time

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

RMS(Å)

File

Notes

 
27/11/2003
 
08:39:00
 
5.84E-03
 
2.00E-03
 
0.8883
 
56.388
 
WHTPA27N.PRN

 

 
27/11/2003
 
02:59:26
 
1.20E-02
 
7.80E-03
 
0.8342
 
79.715
 
WHTPB27N.PRN
 
After CO2 cleaning
 
09/09/2003
 
01:25:07
 
6.46E-03
 
3.71E-03
 
0.8839
 
56.989
 
WHTP909.PRN
 
Before CO2 cleaning
 
20/08/2003
 
01:45:07
 
5.76E-03
 
3.33E-03
 
0.8729
 
54.085
 
WHTP208.PRN

 

 
13/06/2003
 
 
 
 
 
 
 
 
 
 
 
 

Cleaned 13/06/2003 no reflectivity data

 
08/05/2003
 
 
 
 
 
 
 
 
 
 
 
 

Cleaned 08/05/2003 no reflectivity data

 
28/03/2003
 
11:44:30
 
3.56E-03
 
1.32E-03
 
0.8743
 
44.103
 
WHTP2803.PRN

 

 
03/03/2003
 
09:52:58
 
6.11E-03
 
3.72E-03
 
0.8351
 
60.225
 
WHTPB033.PRN

 

 
17/01/2003
 
12:14:53
 
1.50E-03
 
3.04E-04
 
0.8875
 
36.865
 
WHTPA171.PRN
 
Before CO2 cleaning
 
17/01/2003
 
11:11:17
 
2.54E-03
 
9.34E-04
 
0.8763
 
36.941
 
WHTPB171.PRN
 
After CO2 cleaning
 
03/01/2003
 
11:55:49
 
2.27E-03
 
1.02E-03
 
0.8551
 
35.028
 
WHTP0301.PRN
 
Before CO2 cleaning

2002

Date

Time

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

RMS (Å)

File

 Notes 
16/12/2002
 
14:43:10
 
1.33E-03
 
1.14E-04
 
0.8550
 
63.715
 
WHTPA16D.PRN
   
15/12/2002
 
18:04:32
 
4.72E-03
 
7.12E-04
 
0.8644
 
67.970
 
WHTPASTM.PRN
   
15/12/2002
 
17:18:55
 
6.68E-03
 
1.18E-03
 
0.8531
 
73.105
 
WHTPSTM.PRN
   
15/12/2002
 
17:06:43
 
2.30E-02
 
5.36E-03
 
0.8080
 
125.022
 
WHTPB15D.PRN
   
15/11/2002
 
10:36:35
 
1.34E-02
 
3.66E-03
 
0.8273
 
91.663
 
WHTP1411.PRN
   
30/10/2002
 
14:27:54
 
1.15E-02
 
2.88E-03
 
0.8426
 
86.248
 
WHTPA30.PRN
   
30/10/2002
 
11:34:51
 
1.44E-02
 
5.10E-03
 
0.8290
 
90.648
 
WHTPB30.PRN
   
08/10/2002
 
11:36:11
 
1.29E-02
 
4.35E-03
 
0.8158
 
87.365
 
WHTP0810.PRN
   
25/09/2002
 
10:35:15
 
1.15E-02
 
2.78E-03
 
0.8479
 
86.504
 
WHTPA259.PRN
   
25/09/2002
 
08:16:42
 
1.29E-02
 
4.21E-03
 
0.8421
 
86.629
 
WHTPB259.PRN
   
13/09/2002
 
08:52:42
 
1.17E-02
 
3.79E-03
 
0.8377
 
82.545
 
WHTP1309.PRN
   
16/08/2002
 
12:13:12
 
1.21E-02
 
3.38E-03
 
0.8273
 
86.250
 
WHTPA168.PRN
   
16/08/2002
 
08:21:27
 
1.54E-02
 
6.22E-03
 
0.8257
 
92.352
 
WHTPB168.PRN
   
12/07/2002
 
09:03:45
 
1.04E-02
 
2.51E-03
 
0.8569
 
80.755
 
WHTPA127.PRN
   
08/07/2002
 
09:31:04
 
1.18E-02
 
4.28E-03
 
0.8366
 
81.948
 
WHTP807.PRN
   
31/05/2002
 
09:07:48
 
1.15E-02
 
3.88E-03
 
0.8459
 
80.048
 
WHTPB315.PRN
   
31/05/2002
 
08:13:07
 
9.66E-03
 
2.29E-03
 
0.8312
 
80.063
 
WHTPA315.PRN
   
26/04/2002
 
13:27:30
 
1.54E-02
 
6.33E-03
 
0.8124
 
93.105
 
WHTP264.PRN
   
26/04/2002
 
09:05:22
 
9.17E-03
 
2.16E-03
 
0.8439
 
77.000
 
WHTPA264.PRN
   
16/04/2002
 
08:38:24
 
1.17E-02
 
2.95E-03
 
0.8416
 
86.344
 
WHTP1604.PRN
   
26/03/2002
 
11:06:35
 
1.48E-02
 
6.07E-03
 
0.7690
 
94.256
 
WHTPB263.PRN
   
26/03/2002
 
09:17:32
 
1.05E-02
 
2.60E-03
 
0.8330
 
82.410
 
WHTPA263.PRN
   
05/02/2002
 
10:31:33
 
1.18E-02
 
4.21E-03
 
0.8075
 
83.375
 
WHTBEFO050202.PRN
   
05/02/2002
 
10:31:33
 
9.26E-03
 
2.36E-03
 
0.8050
 
77.982
 
WHTPACO205022002.PRN
   
05/02/2002
 
10:09:04
 
9.26E-03
 
2.36E-03
 
0.8050
 
77.982
 
WHTPACO2050202.PRN
   
07/01/2002
 
11:21:20
 
1.20E-02
 
3.75E-03
 
0.8134
 
85.665
 
WHTPB701.PRN
   
07/01/2002
 
09:29:16
 
9.79E-03
 
2.34E-03
 
0.8422
 
79.987
 
WHTPA701.PRN
  

2001

Date

Time

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

RMS (Å)

File

 Notes 
04/12/2001
 
10:02:15
 
1.06E-02
 
3.59E-03
 
0.8222
 
79.611
 
WHTP412.PRN
   
19/11/2001
 
09:45:24
 
1.13E-02
 
3.15E-03
 
0.8037
 
85.643
 
WHTP1911.PRN
   
05/11/2001
 
09:50:10
 
1.08E-02
 
3.12E-03
 
0.8384
 
80.685
 
WHTP511.PRN
   
16/10/2001
 
08:41:53
 
9.52E-03
 
2.41E-03
 
0.8434
 
78.855
 
WHTP1610.PRN
   
03/10/2001
 
09:37:51
 
1.03E-02
 
3.58E-03
 
0.7043
 
70.600
 
WHTPBCO2_031001.PRN
   
03/10/2001
 
09:05:18
 
8.86E-03
 
2.44E-03
 
0.8358
 
74.833
 
WHTPACO2_031001.PRN
   
17/09/2001
 
08:43:04
 
8.69E-03
 
3.41E-03
 
0.8674
 
68.568
 
WHTP1709.PRN
   
05/09/2001
 
08:48:52
 
1.20E-02
 
6.56E-03
 
0.8507
 
79.091
 
WHTPB509.PRN
   
20/08/2001
 
08:54:46
 
1.05E-02
 
5.83E-03
 
0.8239
 
75.318
 
WHTP2008.PRN
   
17/07/2001
 
09:18:32
 
7.49E-03
 
3.09E-03
 
0.8866
 
62.596
 
WHTP1807.PRN
   
05/07/2001
 
10:34:18
 
7.02E-03
 
3.02E-03
 
0.8778
 
60.500
 
WHTP507B.PRN
   
05/07/2001
 
08:35:32
 
5.56E-03
 
1.55E-03
 
0.8969
 
56.067
 
WHTP507A.PRN
   
05/06/2001
 
09:16:28
 
5.45E-03
 
1.52E-03
 
0.8517
 
55.683
 
WHTPA506.PRN
   
04/06/2001
 
13:02:49
 
6.53E-03
 
2.14E-03
 
0.8807
 
59.800
 
WHTPCO20.PRN
   
22/05/2001
 
09:02:45
 
7.20E-03
 
1.80E-03
 
0.8864
 
65.538
 
WHTP22-5.PRN
   
09/05/2001
 
10:57:07
 
6.91E-03
 
3.26E-03
 
0.8666
 
60.122
 
WHT05PB.PRN
   
09/05/2001
 
10:09:20
 
5.98E-03
 
1.67E-03
 
0.8817
 
58.703
 
WHT05PA.PRN
   
27/04/2001
 
08:57:26
 
6.58E-03
 
2.32E-03
 
0.8673
 
60.300
 
WHT27401.PRN
   
03/04/2001
 
08:49:09
 
8.63E-03
 
4.32E-03
 
0.8771
 
66.467
 
WHTPBCO2.PRN
   
27/03/2001
 
10:46:10
 
8.54E-03
 
3.84E-03
 
0.8753
 
66.834
 
WHTP27-3.PRN
   
14/03/2001
 
10:16:57
 
8.17E-03
 
3.52E-03
 
0.8631
 
66.386
 
WHTP14-3.PRN
   
31/01/2001
 
10:40:02
 
4.10E-03
 
1.20E-03
 
0.8733
 
48.350
 
WHTPACO2.PRN
   
30/01/2001
 
13:54:17
 
8.74E-03
 
5.15E-03
 
0.8603
 
67.084
 
WHTP3001.PRN
  

2000

Date

Time

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

RMS (Å)

File

 Notes 
21/12/2000
 
12:00:45
 
8.16E-03
 
3.74E-03
 
0.8562
 
65.833
 
WHTP2112.PRN
   
31/10/2000
 
15:02:12
 
5.76E-03
 
2.95E-03
 
0.8635
 
54.523
 
WHTP3110.PRN
   
19/10/2000
 
10:51:02
 
5.00E-03
 
2.41E-03
 
0.8603
 
51.250
 
WHT1910.PRN
   
08/09/2000
 
09:50:25
 
3.28E-03
 
1.32E-03
 
0.8774
 
41.500
 
WHT89.PRN
   
14/06/2000
 
13:56:14
 
1.11E-03
 
9.96E-05
 
0.8806
 
55.130
 
WHTALUM.PRN
   
13/06/2000
 
16:21:32
 
2.57E-02
 
1.12E-02
 
0.7922
 
120.882
 
WHTBEFOR.PRN
   
13/06/2000
 
16:01:01
 
8.24E-03
 
1.50E-03
 
0.8538
 
77.600
 
WHTWATER.PRN
   
12/05/2000
 
11:09:57
 
2.06E-02
 
4.78E-03
 
0.8338
 
116.187
 
WHTRMSVG.PRN
   
10/05/2000
 
14:06:15
 
1.76E-02
 
4.52E-03
 
0.8454
 
104.767
 
WHTAFTER.PRN
   
26/04/2000
 
08:59:07
 
2.22E-02
 
9.69E-03
 
0.8474
 
109.704
 
WHT_RMS.PRN
   
29/03/2000
 
09:39:29
 
2.26E-02
 
1.10E-02
 
0.8119
 
111.878
 
WHT293_M.PRN