4m Victor Blanco telescope reflectometry /scattering data
** Notes on calibration:...
** Aluminizing in August 2000: reflectometry before/after, scatterometry before and after.
** Current state of the mirror: (since August 2000)
REFLECTIVITY and SCATTERING.
** August 1998 to August 2000: regular CO2 cleaning
See the plots corresponding to the entire period: REFLECTIVITY and SCATTERING.
Below is a table of the numerical data measured with the Minolta reflectometer. In parenthesis (last column) is the number of points sampled on the mirror for each result. Each point on the mirror is sampled 3 times (averaged by the reflectometer). On some dates (like 23Dec98), we also indicate the variations (+/-) in the data. For the first row, replace "before/after CO2 cleaning" by "before/after Al". The case "before Al" means the mirror was CO2 cleaned and measured just before realuminizing.
Since 17 April 99, we are sampling the same 3 points as we have put some marks on the mirror (the sampling points were random up to that date). On Sept 18th, we changed the edge sampling point.
|
DATE |
% Reflectivity before CO2 cleaning |
% Reflectivity after CO2 cleaning |
% Scattering before CO2 cleaning |
% Scattering after CO2 cleaning |
Elapsed time (week) between new Al and CO2 |
||||
|
400nm |
700nm |
400nm |
700nm |
400nm |
700nm |
400nm |
700nm |
||
|
7-Aug-98 |
81.68 |
78.56 |
93.88 |
89.6 |
8.32 |
8.75 |
0.58 |
0.33 |
new aluminium |
|
25-Aug-98 |
92.6 |
88.83 |
92.82 |
89.16 |
0.70 |
0.61 |
0.73 |
0.55 |
2 (1) |
|
10-Sep-98 |
91.99 |
88.55 |
92.88 |
89.05 |
0.91 |
0.73 |
0.73 |
0.56 |
4 (1) |
|
30-Sep-98 |
92.33 |
88.53 |
92.34 |
88.64 |
1.12 |
0.86 |
0.92 |
0.73 |
7 (1) |
|
14-Oct-98 |
93.59 |
88.71 |
93.83 |
88.68 |
0.93 |
0.82 |
0.78 |
0.66 |
9 (1) |
|
29-Oct-98 |
91.81 |
88.66 |
90.97 |
88.22 |
0.69 |
0.61 |
0.94 |
0.70 |
11 (1) |
|
12-Nov-98 |
90.96 |
88.06 |
90.45 |
87.96 |
1.09 |
0.95 |
1.12 |
0.83 |
13 (1) |
|
26-Nov-98 |
91.19 |
87.75 |
90.4 |
87.31 |
1.40 |
1.21 |
1.55 |
1.07 |
15 (2) |
|
12-Dic-98 |
90.87 |
87.45 |
91.28 |
87.87 |
1.94 |
1.45 |
1.1 |
0.92 |
17 (3) |
|
23-Dic-98 +/- |
92.57 0.51 |
88.33 0.30 |
92.69 0.78 |
88.51 0.39 |
1.30 0.19 |
1.19 0.09 |
1.20 0.25 |
1.00 0.21 |
19 (4) |
|
10-Jan-99 +/- |
90.78 1.83 |
87.2 1.19 |
91.58 1.02 |
87.96 0.40 |
1.83 0.60 |
1.56 0.19 |
1.56 0.20 |
1.29 0.14 |
21 (4) |
|
23-Jan-99 |
90.8 |
87.03 |
90.95 |
87.55 |
2.29 |
2.03 |
2.04 |
1.52 |
23 (3) |
|
5-Feb-99 |
91.11 |
87.59 |
91.41 |
87.76 |
1.92 |
1.64 |
2.02 |
1.55 |
25 (3) |
|
19-Feb-99 |
89.94 |
86.42 |
90.3 |
86.67 |
2.86 |
2.59 |
2.68 |
2.35 |
27 (3) |
|
6-Mar-99 |
89.51 |
86.32 |
89.82 |
86.61 |
2.98 |
2.42 |
3.18 |
2.45 |
29 (3) |
|
19-Mar-99 |
90.25 |
86.94 |
90.48 |
87.04 |
2.75 |
2.19 |
2.68 |
2.12 |
31 (3) |
|
3-Apr-99 +/- |
89.62 1.03 |
86.23 0.45 |
90.31 0.77 |
86.51 0.23 |
3.62 0.81 |
2.9 0.39 |
3.15 0.07 |
2.77 0.10 |
33 (3) |
|
17-Apr-99 |
90.4 |
86.93 |
90.55 |
87.14 |
2.88 |
2.25 |
2.75 |
2.00 |
35 (3) |
|
1-May-99 |
89.85 |
87.07 |
88.88 |
85.82 |
2.6 |
2.02 |
2.82 |
2.09 |
37 (3) |
|
15-May-99 |
89.79 |
86.85 |
89.81 |
86.97 |
2.95 |
2.15 |
2.87 |
2.12 |
39 (3) |
|
30-May-99 |
89.45 |
86.69 |
89.75 |
86.92 |
2.94 |
2.2 |
2.86 |
2.06 |
41 (3) |
|
13-Jun-99 |
89.83 |
87.01 |
89.69 |
87.05 |
2.76 |
2.04 |
2.92 |
2.07 |
43 (2) |
|
10-Jul-99 |
89.7 |
86.78 |
89.47 |
87.14 |
- |
- |
2.81 |
1.99 |
47 (2) |
|
23-Jul-99 |
89.48 |
86.56 |
89.74 |
87.06 |
2.99 |
2.15 |
2.91 |
2.07 |
49 (2) |
|
08-Aug-99 |
88.35 |
86.55 |
88.51 |
86.62 |
3.0 |
2.17 |
3.02 |
2.14 |
51 (2) |
|
22-Aug-99 |
88.82 |
86.31 |
88.69 |
86.3 |
3.12 |
2.29 |
3.01 |
2.15 |
53 (2) |
|
4-Sep-99 |
89.3 |
86.4 |
87.89 |
85.31 |
3.15 |
2.25 |
3.68 |
2.45 |
55 (2) |
|
18-Sept-99 |
89.6 |
86.37 |
89.2 |
86.24 |
2.95 |
2.32 |
3.15 |
2.38 |
57(3) |
|
3-Oct-99 |
88.56 |
85.61 |
88.87 |
86.02 |
3.21 |
2.47 |
3.36 |
2.43 |
59 (3) |
|
15-Oct-99 |
89.9 |
87.01 |
89.79 |
86.89 |
2.83 |
2.1 |
3.13 |
2.29 |
61 (3) |
|
30-Oct-99 |
88.91 |
86.09 |
89.23 |
86.42 |
3.22 |
2.46 |
3.24 |
2.35 |
63 (3) |
|
12-Nov-99 |
88.72 |
85.97 |
88.77 |
86.08 |
3.38 |
2.57 |
3.33 |
2.47 |
65 (3) |
|
29-Nov-99 |
87.66 |
85.26 |
87.85 |
85.36 |
4.36 |
3.35 |
4.27 |
3.21 |
67 (3) |
|
10-Dec-99 |
87.83 |
85.22 |
87.48 |
85.2 |
4.11 |
3.23 |
4.24 |
3.11 |
69 (3) |
|
23-Dec-99 |
87.67 |
85.06 |
88.12 |
85.43 |
4.82 |
3.64 |
4.42 |
3.31 |
71 (3) |
|
7-Jan-00 |
85.67 |
83.43 |
86.32 |
83.94 |
no cleaning (interp) |
||||
|
22-Jan-00 |
83.67 |
81.8 |
84.51 |
82.44 |
7.43 |
6.01 |
7.22 |
5.77 |
75(3) |
|
5-Feb-00 |
83.49 |
81.88 |
84.04 |
82.31 |
7.50 |
5.95 |
7.29 |
5.67 |
77 (3) interpolated |
|
22-Feb-00 |
83.31 |
81.96 |
83.57 |
82.18 |
7.57 |
5.89 |
7.36 |
5.57 |
79 (3) interpolated |
|
3-Mar-00 |
83.12 |
82.06 |
83.1 |
82.04 |
7.64 |
5.82 |
7.44 |
5.48 |
81 (3) |
|
17-Mar-00 |
82.36 |
81.18 |
82.95 |
81.92 |
8.48 |
6.56 |
8.05 |
5.93 |
83 (2) |
|
31-Mar-00 |
83.04 |
81.6 |
83.2 |
81.73 |
7.93 |
5.96 |
8.02 |
6.05 |
85 (3) |
|
13-Apr-00 |
82.39 |
80.99 |
82.27 |
81.02 |
8.51 |
6.37 |
8.60 |
6.34 |
87(3) |
|
30-Apr-00 |
82.91 |
81.88 |
83.03 |
82.13 |
8.34 |
5.95 |
8.13 |
5.75 |
89 (3) |
|
10_may-00 |
81.02 |
79.8 |
81.11 |
80.67 |
10.18 |
7.99 |
9.68 |
7.03 |
90 (2) |
|
27-May-00 |
82.82 |
81.87 |
82.76 |
81.89 |
8.02 |
5.93 |
7.71 |
5.70 |
91 (3) |
|
11-June-00 |
82.22 |
81.04 |
81.98 |
81.35 |
8.81 |
6.79 |
8.85 |
6.45 |
93 (3) |
|
23-June-00 |
No cleaning |
||||||||
|
6-July-00 |
81.88 |
81.26 |
81.82 |
81.17 |
8.68 |
6.28 |
8.86 |
6.44 |
97 (3) |
|
22-Jul-00 |
80.76 |
80.58 |
82.31 |
81.41 |
9.39 |
6.73 |
8.24 |
6.16 |
99 (3) |
** August 98: see the plots for
before washing and after realuminizing (note: the mirror had not been cleaned since early 1997).
