1.5m telescope reflectometry data
* REGULAR CO2 CLEANING
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 10Jan98), 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 dusted and measured just before realuminizing.
|
DATE |
% Reflectivity before CO2 cleaning |
% Reflectivity after CO2 cleaning |
% Scattering before CO2 cleaning |
% Scattering after CO2 cleaning |
Elapsed time (weeks) between new Al and CO2 |
||||
|
400nm |
700nm |
400nm |
700nm |
400nm |
700nm |
400nm |
700nm |
||
|
2-Sep-98 +/- |
91.91 0.47 |
88.62 0.13 |
94.93 0.74 |
89.88 0.50 |
4.49 0.71 |
4.40 0.39 |
1.47 1.41 |
0.77 0.71 |
new aluminium (3) |
|
10-Sep-98 |
95.77 |
90.53 |
95.02 |
90.1 |
0.61 |
0.43 |
0.49 |
0.35 |
1 (1) |
|
14-Oct-98 |
95.16 |
89.69 |
95.86 |
90.59 |
1.06 |
0.80 |
0.63 |
0.54 |
6 (2) |
|
13-Nov-98 |
no data |
10 (0) |
|||||||
|
11-Dec-98 |
93.54 |
88.84 |
95.09 |
90.26 |
1.95 |
1.61 |
1.51 |
1.18 |
14 (4) |
|
10-Jan-99 +/- |
93.39 1.78 |
88.89 0.83 |
95.1 0.9 |
90.08 0.78 |
1.77 0.01 |
1.98 0.04 |
1.41 0.16 |
1.32 0.22 |
18 (4) |
|
19-Fev-99 |
94.52 |
89.80 |
95.36 |
90.13 |
3.34 |
3.34 |
3.12 |
2.55 |
23 (3) |
|
19-Mar-99 |
94.95 |
90.02 |
95.28 |
90.17 |
2.61 |
2.56 |
2.69 |
2.11 |
27 (3) |
