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

Reflectivity results - WHT Primary Mirror

2023

Date

Dome     °C/ %RH

Reflectivity

Scattering

File

Notes
25/10/2023   -/- 88.8% (624 nm) 4% (DI, 624 nm) 20231025_WHTM1_Wash.pdf Water wash before WEAVE Inauguration

2020

Date

Dome     °C/ %RH

Reflectivity

Scattering

File

Notes
20/07/2020   -/- 89.6% (624 nm) 1.9% (DI, 624 nm) 20200720_WHTM1_CO2.pdf First CO2 since aluminising
04/03/2020   -/- 89.9% (624 nm) 1.6% (DI, 624 nm) 20200304_WHTM1_Alum.pdf New Aluminium, first since 2016; values consistent with previous coatings

2019

Date

Dome     °C/ %RH

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

Scattering

File

Notes
17/10/2019   13 /60 n/a n/a 77.9% (624 nm) 22.2% (DI, 624 nm) 20191017_WHTM1_compar.pdf Scattering 20%,Historical low: reflectivity 10% below washed mirror value
07/02/2019   15 /23 n/a n/a 82.7% (624 nm) 14.4% (DI, 624 nm) 20190207_WHTM1_CO2.pdf <1.4% loss in %R since 8/2018

2018

Date

Dome     °C/ %RH

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

Scattering

File

Notes
22/10/2018   12/50/td> n/a n/a 83.9% (624 nm) 14.2% (DI, 624 nm) 20181022_WHTM1_check.pdf <1.6% loss in %R since CO2
18/09/2018   -/- n/a n/a 85.0% (624 nm) 11.3% (624 nm) 20180918_WHTM1_check.pdf Inspection and measurement
05/09/2018   -/- n/a n/a 85.5% (624 nm) 10.7% (624 nm) 20180905_WHTM1_check.pdf Inspection and measurement
27/08/2018   15/20 n/a n/a 85.5% (624 nm) 10.3% (624 nm) 20180827_WHTM1_CO2.pdf 2xCO2 in August. Dust remains, scattering in blue too. Graphs of trends over 16 months.
02/08/2018   -/- n/a n/a 81.5% (624 nm) 15.6% (624 nm) 20180827_WHTM1_CO2.pdf Values before CO2
30/04/2018   n/a n/a n/a 83.7% (624 nm) 12.2% (624 nm) 20180430_WHTM1_check.pdf About half of gain in Dec/17 has been lost

2017

Date

Dome     °C/ %RH

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

Scattering

File

Notes
18/12/2017   8°, 10% n/a n/a 86.3% (624 nm) 8.8% (624 nm) 20171218_WHTM1_CO2.pdf Dust from 3.5 months removed successfully. Scattering reduced 4-11%
18/12/2017   8°, 10% n/a n/a 81.8% (624 nm) 15% (624 nm) 20170929_WHTM1&3_check.pdf More calima events have reduced %R by 4-5%, but humidity etc have reduced opportunities to clean
11/08/2017   20°, 10% n/a n/a 86.2% (624 nm) 8.2% (624 nm) 20170730_WHTM1_CO2.pdf CO2 improved %R by 1-2% but most of this was lost 12 days later
29/06/2017   n/a n/a n/a 88.0% (624 nm) 5.8% (624 nm) 20170629_WHTM1_CO2.pdf After CO2 cleaning
29/06/2017   n/a n/a n/a 85.8% (624 nm) 8.5% (624 nm) 20170629_WHTM1_CO2.pdf Before CO2 cleaning
26/05/2017   n/a n/a n/a 87.2% (624 nm) 6.3% (624 nm) 20170526_WHTM1_check.pdf No cleaning. Less than 2% change w.r.t 15/03
18/04/2017   n/a n/a n/a 87.2% (624 nm) 6.3% (624 nm) 20170418_WHTM1_check.pdf No cleaning
15/03/2017   20%, 6 degC n/a n/a 88.5% ± 0.1 (624 nm) 4.3% ± 0.2 (624 nm) 20170315_WHTM1_CO2.pdf CO2 (new N48) improved CT7 averages by ~3%, recovering levels of December, despite condensation on 31 Jan. Detailed report.
31/01/2017   30%, 5 degC n/a n/a 87.2% (624 nm) 7.2% (624 nm) 20170131_WHTM1_rain.pdf Loss of reflectivity of ~0.4% apparently due to mist entering dome during observing. Reference value implies 0.2% overestimation w.r.t. December
09/01/2017   30%, 10 degC n/a n/a 87.5% (624 nm) 6.1% (624 nm) 20170109_WHTM1_CO2.pdf 0.7% Reflectivity lost; again only 0.5% recovered by CO2. Historical graph.

2016

Date

Dome     °C/ %RH

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

Scattering

File

Notes
07/12/2016   30%, 10 degC n/a n/a 88.4% (624 nm) 5.1% (624 nm) 20161207_WHTM1_CO2.pdf 2 visual inspections + CO2. Cleaned following raindrops (photo in report), only 0.5 %R improvement.
23/09/2016   15%, 10 degC n/a n/a 89.2% (624 nm) 2.9% (624 nm) 20160923_WHTM1_CO2.pdf CT7 only. Improved %R ~1%
16/08/2016   25% RH n/a n/a 89.2% (624 nm) 2.7% (624 nm) 20160816_WHTM1_CO2.pdf CT7 only. Increased %R by 1-1.5%, variation probably due to condensation stains
27/07/2016   n/a n/a n/a 89.4% (624 nm) 2.7% (624 nm) 20160727_WHTM1_Aligal_calima.pdf CT7 only. Using lower quality CO2, 1.3% of reflectivity was recovered but left condensation stains
27/06/2016   n/a n/a n/a 89.8% (624 nm) 1.8% (624 nm) 20160624_WHTM1_CO2_calima.pdf CT7 only. Recovered 1.2% reflectivity, > 0.5% attributable to Calima. Lost 0.3% since Aluminising
18/05/2016   n/a 1.1 E-03 7.4 E-05 90% (624 nm) 1.4% (624 nm) 20160518_WHTM1_Alum.pdf After Aluminisation. Lower reflectivity than last one, may be due to scattering by dust.
09/03/2016   7/30 n/a n/a 88% (624 nm) n/a 20160309_WHTM1_CO2.pdf New CO2 cleaning has removed almost all of dust accumulated since previous CO2. Reflectivity only ~1% lower than after wash last August.
15/02/2016   5/20 7.8 ±0.3 E-03 3.0 ±0.3 E-03 0.840 ±0.002 67 ±4 20160215_WHTM1_CO2.pdf CO2 cleaning improved % by 1.7% (SMS) or 1% (CT7) and scattering by factors <2 (typical). Average %R about 0.7% below washed level in August, or similar to November.

2015

20/11/2015   5/20 4.9 ±1.0 E-03 7.3 ±2.3 E-04 0.840 ±0.003 66 ±4 20151120_WHTM1_CO2.pdf CO2 cleaning improved R by typical ~2%. Accumulated loss since wash 0.5%. SMS R values more variable; more data required.
10/9/2015 and 10/11/2015   n/a n/a n/a 87.4 (624 nm) n/a 20150910_WHTM1_check.pdf Two periodic checks of reflectivity following water wash, but no further cleaning. Almost 2% reflectivity lost during Sept-Oct.
20/08/2015   15/25 3.9 ±0.5 E-03 7.5 ±2 E-04 0.848 ±0.003 55 ±3 20150820_WHTM1_CO2&Wash.pdf R=88.7% at 624 nm in CT7, > 3.3% increase due to Washing. Scattering close to level post-wash 4/2014.
18/05/2015   15/20 9.1 ±0.6 E-03 2.8 ±0.4 E-03 0.836 ±0.003 74 ±2 20150518_WHTM1_CO2.pdf CO2 has removed effect of May Calima (2.5% R), but further 4% gains to be made by Water Washing.
R=87% at 624 nm in CT7.
20/07/2015   15/35 9.5 ±0.9 E-03 2.5 ±0.4 E-03 0.833 ±0.003 77 ±3 20150720_WHTM1_CO2.pdf R=86% at 624 nm in CT7.
CO2 recovered about 1% of reflectivity, returning it to the same level maintained for the last ~ 6 months.
16/03/2015   5/10 9.5 E-03 2.8 E-03 0.833 ± 0.003 75.7 20150316_WHTM1_CO2.pdf 86% at 624 nm in CT7. Sticky dust remains, needs water wash.
27/02/2015   10/10 1.1 E-02 3.3 E-03 0.832 ± 0.003 83 ± 7 20150227_WHTM1_CO2.pdf Cleaning not completed due to frozen hose (needs repetition).

2014

Date

Dome     °C/ %RH

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

RMS (Å)

File

Notes
02/09/2014   n/a 5.3 E-03 1.6 E-03 0.843 ± 0.003 52 ± 2 20140902_WHTM1_CO2.pdf CT7 did not register improvement in %R. Mirror lost 1% R w.r.t. washed.
10/07/2014   15/20 4.9 E-03 1.8 E-03 0.844 ± 0.002 52 ± 2 20140710_WHTM1_CO2.pdf Mean CT7 %R 89.0% shows calima removed. (all values after CO2).
18/06/2014   N/A 6.2E-03 2.7E-03 0.834 ± 0.003 58 20140618_WHTM1_check.pdf %R has decreased by up to 2% since wash Clean appearance.
10/04/2014   6/50 2.5 E-03 7.4 E-04 0.858 ± 0.003 44 ± 2 20140410_WHTM1_wash.pdf After Wash. All parameters improved. Mean CT7 90.0% R, some values close to fresh Al coat.
10/04/2014   10/5 7.1 E-03 2.7 E-03 0.838 ± 0.003 63 ± 2 20140410_WHTM1_wash.pdf Before wash. PArameters only slightly worse than in February.
24/02/2014   6.8 E-03 1.9 E-03 0.840 ± 0.001 64.7 20140224_WHTM1_CO2.pdf Marginal improvements from CO2 cleaning. Water stains remain.

2013

Date

Time

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

RMS (Å)

File

Notes
21/08/2013   3.8 E-03 5.6 E-04 0.856 ± 0.002 58.4 20130821_WHTM1_Wash.pdf After soap/water wash on ground floor. CT7 measurements appended to report.
21/08/2013   1.1 E-02 4.6 E-03 0.824 ± 0.001 78.9 20130821_WHTM1_Wash.pdf Values before washing. Dusty surface - seen to blow off by compressed air.
25/07/2013   5.0 E-03 1.4 E-03 0.852 ± 0.001 55.1 20130723_WHTM1_CO2.pdf CO2 has kept R at 1-2% lower than fresh Al, but scattering has crept upwards 25-75%
25/06/2013   4.0 E-03 8.0 E-04 0.855 ± 0.001 52.0 20130625_WHTM1_CO2.pdf Light coat of dust and some drop stains remain from condensed water or rain
17/04/2013   2.3 E-03 3.4 E-04 0.862 ± 0.001 46.3 20130417_WHTM1_Wash.pdf Soap/Water wash on ground floor. Measurements max. 50cm from edge.
15/03/2013   5.6 E-03 1.4 E-03 0.852 ± 0.003 59.1 201315_WHTM1_CO2.pdf

2012

Date

Time

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

RMS (Å)

File

18/12/2012   4.3 E-03 1.1 E-03 0.840 ± 0.002 54.2 20121218_WHTM1_CO2.pdf Values shown from after CO2. Report shows SMS measurements from before and after CO2.
02/08/2012   2.1 E-03 2.9 E-04 0.855 ± 0.003 46.9 201208_WHTM1_Wash.pdf Values shown from after wash. Report shows SMS and CT7 measurements after CO2 (day before wash) and again after water wash.
24/07/2012   6.5 E-03 3.1 E-03 0.843 ± 0.003 58.8 20120724_WHTM1_check.pdf No cleaning yet. Deciding on water wash.
03/07/2012   3.4 E-03 9.1 E-04 0.850 ± 0.002 45.9 20120703_WHTM1_CO2clean.pdf Report shows data before and after CO2 cleaning. Results almost as good as in April.
08/06/2012   4.1 ± 0.7 E-03 7.8 ± 1.6 E-04 0.847 ± 0.003 51.6 20120608_WHTM1_CO2clean.pdf See Report File for data before and after CO2 cleaning.
08/06/2012   N/A N/A 86.8% avg. over λ N/A 20120608_CO2Cleaning_CT7.pdf Measurements from CT7 refelctometer, showing improvement in 3 red bands only. 624nm value in agreement with SMS.
20/04/2012   3.47E-03 8.00E-04 0.862 ± 0.002 45.6 20120420_WHTM1_CO2clean.pdf Report shows data before and after CO2 cleaning, Tel at AP3. Better result than cleaning in March.
22/03/2012   3.40E-03 1.46E-03 0.855 ± 0.004 43 20120322_WHT_CO2clean_Chk@1wk.pdf First measurement after aluminisation of 7 Feb 2012
07/02/2012   n/a n/a 87% n/a text GTC IRIS meas. after Aluminisation

2011

Date

Time

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

RMS (Å)

File

Notes
21/12/2011   7.94E-03 2.65E-03 0.829 ± 0.006 63 20111221_WHTM1_check&refs.pdf Not much dust has accumulated, %R is OK, so no CO2 cleaning.
Measurements on new SMS reference mirror included at end.
29/11/2011   4.95 E-03 6.73 E-04 0.839 ± 0.006 69 ± 3 Immediately after Water Washing
26/09/2011   1.13 E-02 5.24 E-03 0.827 ± 0.004 79 ± 3 A few days after light rainfall (with dust) while petals and dome open
01/07/2011   7.57 E-03 1.89 E-03 0.835 ± 0.002 72 ± 1 No CO2 cleaning performed for lack of visible dust
17/02/2011   9.27 E-03 3.93 E-03 0.834 ± 0.006 66 ± 2 20110217WHTm1_Damage.pdf 2 days after possible damage event. Measurements at AP3 including dmamge spots
13/01/2011   3.11 E-03 4.3 E-04 0.840 ± 0.006 55 ± 2 20110113WHTm1_afterWash.pdf 2 hours after water (and alcohol) washing, tel at AP3. Compares post-Alum values
13/01/2011   9.8 E-03 1.89 E-03 0.814 ± 0.007 76 ± 2 20110113WHTm1_beforeWash.pdf Before water washing, 3 months since last CO2 cleaning. Measurements at AP3

2010

Date

Time

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

RMS (Å)

File

Notes
01/12/2010   1.00 E-02 3.70 E-03 0.835 ± 0.003 75.22 WHT_Reflectest_Dec2010.pdf 2 months since last CO2 cleaning, with rain spots (porthole measurements).
30/09/2010   7.06 E-03 1.77 E-03 0.827 ± 0.004 67 ± 1 CO2results_20100930.pdf No reflectivity improvement after C02 cleaning this day (porthole measurements), reference readings are low but consistent.
24/08/2010   5.96 E-03 1.59 E-03 0.833 ∓ 0.002 60.63 20100820WHT.pdf Measured 4 days after CO2 cleaning; significant improvements.
Telescope at Zenith (porthole measurements).
20/08/2010   1.27 E-02 6.87 E-03 0.794 ∓ 0.003 84.6 20100820WHT.pdf Before CO2 cleaning. Parameters worse than on 23 June.
Telescope at Zenith (porthole measurements).
16/07/2010   6.62 E-03 2.85 E-03 0.831 ∓ 0.002 60.7 WHT_Reflectest_July2010.pdf Inspection 3 weeks after last CO2 clean. Reference mirror readings varying
Telescope at Zenith (porthole measurements).
23/06/2010   3.33 E-03 9.95 E-04 0.823 ∓ 0.001 55.0 20100623WHT.pdf After CO2 cleaning, %R improved >0.5%. Flakes stuck on. New CO2 bottle.
Telescope at Zenith (porthole measurements).
23/06/2010   6.44 E-03 2.87 E-04 0.815 ∓ 0.003 60.0 20100623WHT.pdf Before CO2 cleaning. SMS head had been cleaned on June 10.
Telescope at Zenith (porthole measurements).
10/06/2010   N/A N/A 0.807 N/A SMS_test0610.pdf Check M1 reflectivity again in view of poor results from last CO2 cleaning. Details of air-cleaning of SMS Head (NOM).
20/05/2010   3.33 E-03 8.78 E-04 0.801 ∓ 0.005 48.06 20100520WHT.pdf After CO2 cleaning - no measureable improvement in Refl. Telescope at Zenith (porthole measurements).
20/05/2010   6.890E-03 2.79E-03 0.806 ∓ 0.003 59.37 20100520WHT.pdf Before CO2 cleaning, telescope in AP3 position
07/04/2010   3.500E-03 8.220E-04 0.826 48.872 20100407WHT.pdf After CO2 cleaning, telescope in AP3 position
07/04/2010   6.020E-03 2.320E-03 0.814 65.343 20100407WHT.pdf Before CO2 cleaning, telescope in AP3 position
11/01/2010   2.833E-03 5.878E-04 0.839 45.440 20100111WHT.pdf After CO2 cleaning, telescope in AP3 position Humidity 0% - no improvement due to low humidity?
11/01/2010   3.788E-03 1.232E-03 0.847 46.929 20100111WHT.pdf Before CO2 cleaning, telescope in AP3 position Humidity 0% - no improvement due to low humidity?

2009

Date

Time

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

RMS (Å)

File

Notes
03/11/2009   2.486E-03 5.100E-03 0.879 56.963 20091103WHTALU.pdf After ALUMINIZATION
02/11/2009   7.913E-03 3.460E-03 0.846 65.673 20091103WHTALU.pdf Before ALUMINIZATION
07/09/2009   5.982E-03 1.676E-03 0.840 59.460 200909007WHT.pdf After CO2 cleaning, telescope in AP3 position
07/09/2009   9.881E-03 5.075E-03 0.821 73.233 20090907WHT.pdf Before CO2 cleaning, telescope in AP3 position
28/07/2009   3.408E-03 7.993E-04 0.841 47.525 20090728WHT.pdf After CO2 cleaning, telescope in AP3 position
28/07/2009   1.127E-02 6.522E-03 0.794 79.246 20090728WHT.pdf Before CO2 cleaning, telescope in AP3 position
07/04/2009   4.158E-03 1.001E-03 0.815 52.800 20090407WHT.pdf After CO2 cleaning, telescope in AP3 position
07/04/2009   8.498E-03 4.076E-03 0.787 69.548 20090407WHT.pdf Before CO2 cleaning, telescope in AP3 position
10/02/2009   2.658E-03 5.702E-04 0.819 43.873 20090210WHT.pdf After CO2 cleaning, telescope in AP3 position
10/02/2009   5.271E-03 1.943E-03 0.813 54.627 20090210WHT.pdf Before CO2 cleaning, telescope in AP3 position

2008

Date

Time

BSDF 0°,0°

(detector position)

BSDF 50°,180°

(detector position)

Reflectivity

RMS (Å)

File

Notes
11-12/11/2008   2.069E-03 2.379E-04 0.859 49.900 20081112WHT.pdf After washing with distilled water, telescope in AP3 position
11-12/11/2008   1.017E-02 3.630E-03 0.790 78.176 20081112WHT.pdf Before washing with distilled water, telescope in AP3 position
16/09/2008   8.747E-03 2.887E-03 0.829 71.394 20080916WHT.pdf After CO2 cleaning, telescope in AP3 position
16/09/2008   8.942E-03 3.209E-03 0.819 71.506 20080916WHT.pdf Before CO2 cleaning, telescope in AP3 position
02/09/2008   9.773E-03 3.340E-03 0.807 73.820 20080902WHT.pdf After CO2 cleaning, telescope in AP3 position
02/09/2008   1.365E-02 6.799E-03 0.789 88.123 20080902WHT.pdf Before CO2 cleaning, telescope in AP3 position
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