# Subaru Telescope Primary Mirror In-Situ Measured Reflectivity # Coated with Aluminum on 2017-10-20 # Opened the vacuum chamber on 2017-11-21 # Measured with Subaru Portable Spectrophotometer (SPS) on 2018-10-12 (357 days after) # Measured four times at around the position 3 # Data between 950 nm and 1650 nm are also available (SPS-XWW). # Contact: Hirofumi Okita (okita14@naoj.org) # # Wavelength (nm) Pos.3 #1 Pos.3 #2 Pos.3 #3 Pos.3 #4 1000 90.43 90.34 90.32 90.35 998 90.74 90.62 90.19 90.47 996 90.74 90.21 90.18 91.07 994 90.13 89.80 90.13 89.87 992 90.29 89.53 90.20 90.10 990 90.88 90.06 89.49 90.01 988 89.99 90.85 90.06 89.83 986 89.95 90.64 90.50 90.59 984 89.57 90.03 90.29 90.34 982 90.43 89.99 90.47 89.84 980 89.64 89.67 90.26 89.71 978 90.12 89.81 89.89 89.80 976 89.72 89.47 90.56 89.86 974 89.53 89.64 90.25 89.64 972 89.77 90.02 90.19 90.02 970 89.76 90.06 89.81 90.40 968 89.96 90.09 90.01 89.40 966 89.44 89.77 88.98 89.59 964 89.44 89.92 88.82 89.95 962 89.62 89.97 89.75 89.44 960 89.30 89.50 90.16 89.83 958 89.76 89.61 89.58 89.82 956 89.07 89.79 89.77 90.14 954 89.13 89.31 89.67 89.46 952 88.87 89.05 89.41 89.15 950 88.76 89.28 89.26 88.34 948 89.09 88.74 89.25 88.96 946 89.26 88.86 88.50 89.54 944 89.12 89.05 88.73 88.85 942 88.82 88.33 88.57 88.70 940 88.84 88.60 88.78 88.37 938 88.89 88.66 88.62 88.72 936 88.62 88.59 88.28 88.80 934 88.11 87.89 88.19 88.43 932 88.36 88.53 88.08 88.53 930 88.30 88.41 88.04 87.99 928 88.35 87.83 88.54 87.88 926 87.68 87.72 87.88 88.08 924 88.14 87.24 87.88 87.85 922 87.52 87.40 88.12 88.13 920 87.74 87.67 87.26 87.81 918 87.52 87.60 87.83 87.84 916 87.52 87.35 87.68 87.59 914 87.21 87.22 87.56 87.24 912 86.94 86.98 87.12 87.26 910 86.78 86.46 86.95 86.78 908 86.83 86.74 86.91 86.66 906 86.87 86.93 86.97 86.95 904 86.47 86.45 86.47 86.44 902 86.54 86.70 86.89 86.56 900 86.34 86.36 86.18 86.43 898 86.40 86.12 86.28 86.17 896 86.33 86.00 85.81 86.39 894 86.14 85.98 86.12 85.96 892 85.77 86.12 85.79 85.76 890 85.44 85.48 85.72 85.65 888 85.67 85.29 85.77 85.56 886 85.41 85.32 85.74 85.63 884 85.27 85.22 85.20 85.24 882 85.01 85.03 85.15 85.25 880 84.76 85.10 84.95 85.14 878 84.72 84.71 85.14 85.11 876 84.71 84.18 84.65 84.71 874 84.46 84.12 84.52 84.57 872 84.26 84.24 84.76 84.06 870 84.14 83.90 84.17 84.28 868 84.33 83.98 84.26 84.02 866 83.85 83.66 84.07 83.97 864 83.97 83.53 83.61 83.73 862 83.83 83.49 83.63 83.75 860 83.71 83.45 83.81 83.62 858 83.47 83.65 83.29 83.49 856 83.39 83.17 83.12 83.38 854 83.54 83.07 83.27 83.03 852 82.92 83.20 83.06 83.07 850 83.15 82.41 82.79 82.69 848 82.70 82.54 82.64 82.70 846 82.65 82.51 83.05 82.79 844 82.69 82.46 82.59 82.52 842 82.50 82.39 82.43 82.61 840 82.33 82.36 82.95 82.72 838 82.51 82.54 82.50 82.34 836 82.37 82.48 82.37 82.39 834 82.54 82.46 82.74 82.46 832 81.88 82.12 82.51 82.33 830 82.52 82.03 81.89 82.00 828 82.41 82.07 82.29 82.24 826 82.25 81.94 82.03 82.12 824 82.07 82.32 82.47 82.11 822 82.20 81.65 81.96 82.21 820 82.22 82.01 82.07 82.02 818 82.36 82.20 81.81 82.22 816 82.30 82.00 82.30 82.18 814 82.28 82.04 82.03 82.40 812 81.94 82.20 82.07 82.47 810 82.23 82.16 81.96 82.37 808 82.30 82.18 82.31 82.26 806 82.35 82.22 82.17 82.36 804 82.54 82.05 82.41 82.74 802 82.07 81.98 82.50 82.19 800 82.57 82.30 82.32 82.52 798 82.45 82.35 82.47 82.62 796 82.69 82.62 82.59 82.61 794 82.56 82.73 82.59 83.06 792 82.97 82.65 82.82 82.69 790 82.89 82.70 82.85 82.68 788 82.88 82.44 82.89 82.59 786 82.77 82.78 83.00 83.13 784 82.83 83.00 83.08 82.97 782 83.06 83.00 82.83 83.36 780 83.06 83.26 83.16 83.36 778 83.20 82.94 83.34 83.09 776 83.29 83.24 83.42 83.30 774 83.34 82.96 83.65 83.46 772 83.65 83.12 83.42 83.57 770 83.73 83.33 83.31 83.15 768 83.40 83.46 83.58 83.56 766 83.63 83.58 83.51 83.52 764 83.57 83.24 83.79 83.55 762 83.56 83.78 83.79 83.86 760 83.61 83.63 83.75 83.98 758 84.11 83.59 84.04 83.81 756 84.16 83.56 84.01 83.83 754 83.95 83.84 83.93 83.81 752 84.10 83.68 83.94 84.03 750 84.15 83.80 84.25 84.14 748 84.37 83.95 84.27 84.31 746 84.44 84.04 84.13 84.25 744 84.23 84.06 84.21 84.41 742 84.18 84.18 84.24 84.34 740 84.61 84.20 84.02 84.31 738 84.62 84.28 84.55 84.49 736 84.59 84.24 84.58 84.65 734 84.52 84.50 84.71 84.45 732 84.58 84.42 84.50 84.61 730 84.94 84.36 84.60 84.73 728 84.42 84.49 84.66 84.77 726 84.82 84.65 84.87 84.72 724 84.83 84.66 84.62 84.75 722 84.78 84.66 84.82 84.88 720 85.04 84.89 84.76 84.87 718 85.06 84.71 84.67 84.90 716 84.90 84.74 84.95 84.90 714 85.02 84.54 84.93 84.93 712 84.92 84.84 84.86 84.91 710 85.22 84.82 85.05 85.17 708 85.19 85.05 84.98 85.29 706 85.15 85.17 84.98 85.14 704 85.11 84.97 84.92 85.13 702 85.13 85.00 85.07 85.18 700 85.39 85.16 85.02 85.13 698 85.16 84.99 85.23 85.19 696 85.41 85.18 85.20 85.40 694 85.40 85.22 85.08 85.00 692 85.34 85.18 85.15 85.18 690 85.44 85.21 85.26 85.19 688 85.49 85.03 85.31 85.25 686 85.57 85.19 85.40 85.43 684 85.73 85.28 85.39 85.44 682 85.26 85.26 85.39 85.47 680 85.59 85.56 85.40 85.56 678 85.62 85.25 85.43 85.25 676 85.69 85.42 85.50 85.38 674 85.61 85.45 85.67 85.63 672 85.66 85.34 85.69 85.48 670 85.57 85.54 85.61 85.46 668 85.73 85.32 85.71 85.54 666 85.74 85.65 85.66 85.56 664 85.80 85.55 85.50 85.64 662 86.00 85.69 85.79 85.70 660 85.85 85.74 85.82 85.77 658 85.82 85.73 85.67 85.89 656 85.89 85.66 85.58 85.66 654 85.83 85.81 85.78 85.94 652 85.79 85.60 85.68 85.84 650 85.83 85.54 85.88 85.69 648 86.07 85.79 85.66 85.71 646 85.85 85.73 85.99 85.79 644 86.08 85.87 85.98 85.92 642 86.06 85.89 86.07 86.04 640 86.06 85.75 85.98 86.15 638 86.13 85.85 85.73 86.07 636 86.03 85.76 85.81 85.94 634 85.94 86.11 85.86 86.06 632 86.30 86.02 85.94 85.93 630 86.20 85.73 85.87 85.74 628 86.03 86.00 85.76 85.93 626 85.93 85.95 86.14 86.09 624 86.17 86.03 86.02 85.92 622 86.15 85.88 86.04 86.30 620 86.23 85.94 86.06 86.00 618 86.21 85.76 86.05 86.14 616 86.15 85.97 86.00 86.14 614 86.18 86.03 86.10 86.02 612 86.19 86.07 86.27 86.11 610 86.09 86.13 85.86 86.06 608 86.12 86.02 86.16 86.46 606 86.35 86.04 85.97 86.22 604 86.19 85.97 85.93 86.15 602 86.38 86.10 86.02 86.21 600 86.33 86.11 86.29 86.18 598 86.46 85.93 86.06 86.20 596 86.22 86.07 86.32 86.32 594 86.40 86.03 86.16 86.39 592 86.35 86.19 85.95 86.16 590 86.29 86.00 86.28 86.07 588 86.24 86.08 86.16 86.21 586 86.22 85.99 86.27 86.25 584 86.28 86.08 86.04 86.26 582 86.30 86.13 86.38 86.18 580 86.34 86.09 86.15 86.26 578 86.14 86.28 86.00 86.22 576 86.23 85.94 86.19 86.23 574 86.29 86.14 86.40 86.26 572 86.44 86.11 86.17 86.29 570 86.42 86.18 86.05 86.30 568 86.28 86.06 86.41 86.35 566 86.25 86.14 86.26 86.22 564 86.37 86.30 86.10 86.24 562 86.47 86.11 86.12 86.36 560 86.42 86.17 86.26 86.25 558 86.27 86.14 86.18 86.34 556 86.48 86.24 86.17 86.09 554 86.43 86.12 86.36 86.20 552 86.36 86.13 86.27 86.03 550 86.45 86.14 86.20 86.21 548 86.29 86.22 86.13 86.32 546 86.20 85.96 86.07 86.20 544 86.28 86.05 86.25 86.16 542 86.14 86.09 86.21 86.39 540 86.16 86.22 86.12 86.16 538 86.25 86.11 86.07 86.24 536 86.26 86.25 86.16 86.31 534 86.37 86.16 86.01 86.13 532 86.38 86.26 86.23 86.32 530 86.22 86.17 86.17 86.22 528 86.33 86.13 86.20 86.17 526 86.27 86.16 86.10 86.13 524 86.20 85.95 86.20 86.31 522 86.23 86.29 86.23 86.12 520 86.11 86.19 86.37 86.28 518 86.19 86.05 86.07 86.18 516 86.28 85.94 86.20 86.31 514 86.16 86.03 86.20 86.00 512 86.35 85.96 86.27 86.36 510 86.09 86.00 86.33 85.89 508 86.33 86.00 86.16 86.20 506 86.30 86.03 86.27 86.25 504 86.16 86.13 86.08 86.12 502 86.11 85.99 86.05 86.28 500 86.11 85.91 86.14 86.07 498 86.12 86.07 85.97 86.22 496 86.05 85.78 86.06 86.11 494 86.20 86.28 86.18 85.98 492 85.91 85.95 86.03 86.02 490 86.41 85.93 85.88 86.19 488 86.15 86.07 86.10 86.17 486 86.04 85.81 86.10 86.05 484 86.13 85.78 85.94 86.04 482 85.85 86.07 86.05 86.17 480 86.02 85.99 85.88 85.86 478 85.95 85.92 86.03 85.96 476 86.15 85.88 86.15 86.00 474 86.05 86.00 86.11 86.05 472 86.18 85.85 86.15 86.03 470 86.03 85.88 85.86 85.98 468 85.77 86.07 85.86 86.01 466 85.80 85.96 85.99 85.82 464 85.92 86.24 86.09 85.95 462 86.08 85.79 85.87 85.85 460 85.85 85.67 86.15 86.11 458 86.00 85.87 85.80 86.15 456 85.86 85.84 86.03 85.76 454 85.89 85.82 86.07 85.82 452 85.74 85.72 86.15 86.04 450 85.51 85.99 85.95 86.05 448 85.88 85.90 85.97 86.09 446 85.82 85.76 85.81 86.04 444 86.08 85.80 85.72 86.13 442 85.72 85.61 85.81 86.25 440 85.75 85.70 85.78 85.63 438 85.83 85.66 85.49 85.52 436 85.89 85.59 85.76 85.89 434 85.66 85.77 85.66 85.94 432 85.57 85.82 85.86 85.79 430 85.53 85.69 85.83 86.26 428 85.97 85.66 85.74 85.38 426 85.66 85.78 85.60 86.04 424 86.11 85.57 85.62 85.91 422 85.81 85.72 85.85 85.87 420 85.79 85.72 85.61 85.71 418 85.60 85.42 85.98 85.30 416 85.68 86.06 86.03 85.72 414 86.44 86.11 85.30 85.56 412 85.73 85.53 85.69 85.75 410 85.84 85.51 85.62 85.36 408 85.58 85.72 85.02 85.22 406 86.11 85.90 85.70 85.50 404 85.42 85.21 86.06 85.50 402 85.70 85.72 85.81 85.46 400 85.53 85.91 85.56 85.62 398 85.54 84.83 84.90 85.62 396 85.20 85.20 85.80 85.83 394 85.68 85.76 86.23 85.19 392 85.21 84.99 85.30 85.05 390 85.93 85.53 84.91 85.59 388 85.12 85.56 85.62 85.78 386 84.98 85.45 85.01 85.56 384 84.05 85.70 85.67 85.81 382 85.40 85.52 85.48 85.55 380 85.40 85.34 85.44 87.02 1650 95.21 95.14 95.24 95.20 1640 95.23 95.16 95.25 95.21 1630 95.24 95.15 95.25 95.21 1620 95.24 95.15 95.25 95.22 1610 95.23 95.15 95.25 95.21 1600 95.24 95.14 95.24 95.21 1590 95.23 95.13 95.23 95.20 1580 95.21 95.11 95.21 95.19 1570 95.21 95.10 95.21 95.17 1560 95.19 95.09 95.19 95.16 1550 95.17 95.07 95.18 95.15 1540 95.17 95.05 95.16 95.14 1530 95.15 95.03 95.15 95.11 1520 95.12 95.01 95.12 95.10 1510 95.11 94.99 95.10 95.08 1500 95.09 94.96 95.08 95.05 1490 95.06 94.94 95.07 95.03 1480 95.05 94.92 95.04 95.00 1470 95.02 94.89 95.02 94.98 1460 95.00 94.86 94.99 94.96 1450 94.96 94.83 94.96 94.93 1440 94.95 94.81 94.94 94.91 1430 94.91 94.78 94.91 94.89 1420 94.90 94.75 94.89 94.86 1410 94.87 94.73 94.86 94.84 1400 94.85 94.71 94.83 94.81 1390 94.82 94.67 94.81 94.79 1380 94.78 94.64 94.77 94.75 1370 94.74 94.58 94.72 94.70 1360 94.70 94.54 94.68 94.66 1350 94.65 94.49 94.64 94.61 1340 94.62 94.45 94.60 94.58 1330 94.59 94.42 94.56 94.55 1320 94.55 94.38 94.53 94.51 1310 94.52 94.34 94.49 94.47 1300 94.47 94.30 94.45 94.44 1290 94.44 94.26 94.41 94.40 1280 94.39 94.22 94.37 94.36 1270 94.34 94.17 94.32 94.31 1260 94.31 94.14 94.28 94.26 1250 94.26 94.08 94.23 94.21 1240 94.21 94.03 94.18 94.16 1230 94.17 93.98 94.13 94.11 1220 94.11 93.92 94.08 94.06 1210 94.05 93.86 94.02 94.01 1200 94.00 93.80 93.94 93.93 1190 93.93 93.72 93.88 93.87 1180 93.85 93.64 93.80 93.80 1170 93.78 93.58 93.73 93.72 1160 93.72 93.51 93.67 93.66 1150 93.64 93.43 93.60 93.59 1140 93.55 93.35 93.51 93.50 1130 93.46 93.26 93.42 93.41 1120 93.38 93.15 93.32 93.31 1110 93.26 93.05 93.22 93.21 1100 93.16 92.93 93.11 93.09 1090 93.03 92.81 92.98 92.96 1080 92.89 92.66 92.84 92.83 1070 92.74 92.52 92.70 92.70 1060 92.59 92.36 92.55 92.54 1050 92.42 92.20 92.38 92.37 1040 92.24 92.01 92.20 92.19 1030 92.05 91.82 92.01 92.00 1020 91.83 91.59 91.78 91.78 1010 91.59 91.36 91.55 91.55 1000 91.34 91.11 91.29 91.30 990 91.05 90.81 91.02 91.02 980 90.73 90.49 90.71 90.71 970 90.38 90.15 90.36 90.36 960 90.00 89.77 89.98 89.97 950 89.58 89.34 89.55 89.54