# 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 2020-09-25 (1071 days after) # Measured five 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 Pos.3 #5 1000 88.04 86.96 87.25 88.13 88.78 998 87.52 87.07 87.54 88.64 87.61 996 87.28 86.18 87.73 88.12 88.16 994 87.91 87.20 88.57 88.55 88.92 992 87.48 86.80 87.69 88.33 88.00 990 88.01 87.32 88.11 87.47 88.23 988 86.98 87.62 87.42 87.53 87.91 986 87.89 86.32 88.24 87.63 88.01 984 86.83 87.78 87.55 87.79 87.62 982 87.92 87.36 88.85 88.11 87.33 980 86.96 86.63 87.20 88.32 87.88 978 87.47 86.83 87.93 87.58 87.68 976 87.26 87.83 88.04 86.82 87.32 974 86.98 86.38 87.31 87.91 87.12 972 86.91 86.78 87.52 87.85 88.07 970 87.27 86.38 87.21 87.59 87.63 968 87.24 86.78 87.40 87.06 87.40 966 86.45 86.18 87.72 87.29 87.31 964 86.80 86.92 87.28 87.05 87.06 962 86.35 86.63 86.38 87.62 87.02 960 86.47 86.66 87.25 87.34 87.21 958 87.12 86.30 86.81 87.50 87.31 956 86.22 86.41 86.94 86.91 86.44 954 86.62 86.13 86.99 86.95 86.80 952 86.14 86.13 86.62 86.36 86.96 950 86.14 86.58 86.61 86.79 86.90 948 85.54 86.01 86.91 86.97 87.01 946 86.53 85.72 86.23 86.10 86.26 944 85.31 85.97 86.29 86.07 86.52 942 85.65 85.66 86.36 85.93 86.47 940 85.71 85.55 86.60 86.36 86.35 938 86.03 85.24 86.55 86.10 86.12 936 86.05 85.38 85.99 85.93 85.87 934 85.31 85.10 86.38 85.67 86.22 932 85.91 85.24 86.37 85.74 86.29 930 85.81 85.10 86.33 85.80 86.08 928 85.52 85.31 85.51 85.46 85.75 926 85.20 84.90 85.38 85.67 85.67 924 85.11 84.99 85.42 85.37 85.53 922 84.57 85.08 85.09 85.38 85.34 920 85.24 84.11 85.22 85.75 85.34 918 85.02 84.57 84.89 85.15 85.23 916 84.67 84.15 84.63 84.85 85.49 914 83.99 83.87 84.91 84.36 85.10 912 84.34 84.00 84.23 84.82 84.81 910 84.12 83.76 84.62 84.72 85.17 908 84.07 83.52 84.33 84.06 84.61 906 83.76 83.81 83.91 84.40 84.37 904 83.77 83.94 83.94 84.19 84.67 902 84.05 83.62 84.03 84.34 84.49 900 83.42 83.12 83.82 84.19 84.31 898 83.57 82.92 83.59 83.77 83.84 896 83.15 82.82 83.28 83.38 83.73 894 82.95 82.73 83.32 83.41 83.91 892 82.85 82.26 83.08 83.25 83.63 890 82.70 82.05 83.03 82.74 83.50 888 82.37 82.40 82.97 83.11 83.54 886 82.51 81.84 82.82 82.82 83.19 884 82.24 81.92 82.74 82.58 82.29 882 82.21 81.61 82.66 82.62 82.79 880 82.16 81.67 82.34 82.75 82.52 878 82.19 81.47 82.33 82.49 82.52 876 81.66 81.02 81.99 82.34 82.18 874 81.34 81.24 81.94 81.94 81.69 872 81.12 81.27 81.98 81.73 81.63 870 81.33 80.84 81.93 81.57 82.03 868 81.33 80.70 81.52 81.62 81.83 866 81.05 80.80 81.66 81.68 81.13 864 80.84 80.32 81.13 81.45 81.44 862 80.51 80.16 81.08 80.96 81.06 860 80.41 80.24 80.93 81.12 81.18 858 80.89 80.11 80.79 80.94 81.03 856 80.09 80.21 80.58 80.98 80.72 854 80.35 80.04 80.43 80.64 80.97 852 80.31 79.70 80.79 80.53 80.74 850 80.32 79.47 80.44 80.44 80.71 848 80.05 79.36 80.24 80.28 80.55 846 79.80 79.76 80.31 79.95 80.48 844 79.77 79.01 79.80 80.24 80.23 842 79.60 79.12 80.03 80.12 80.32 840 79.61 79.06 80.11 80.18 80.17 838 79.49 79.14 79.89 80.13 80.11 836 79.29 78.92 79.72 79.81 79.95 834 79.15 78.84 79.88 79.80 79.91 832 79.09 78.92 79.50 80.04 80.31 830 79.20 78.70 80.06 79.83 79.84 828 79.54 79.22 79.68 79.90 80.13 826 79.53 78.85 79.61 79.26 80.06 824 79.06 78.95 79.23 79.61 79.57 822 79.27 78.93 79.94 79.93 79.90 820 79.21 78.75 79.69 79.53 79.96 818 79.07 78.72 79.78 79.50 79.92 816 78.94 78.83 79.45 79.32 79.89 814 79.06 78.90 79.50 79.77 79.85 812 79.57 78.87 79.38 79.57 79.73 810 79.38 78.90 79.33 79.86 79.76 808 79.30 78.86 79.88 79.77 79.87 806 79.59 79.00 79.54 79.72 80.22 804 79.33 78.90 80.22 79.83 80.06 802 79.65 78.91 80.03 80.11 80.21 800 79.12 79.09 79.78 80.15 80.21 798 79.46 79.28 80.10 80.05 80.10 796 79.59 79.08 80.07 80.03 80.45 794 79.69 79.29 79.77 80.05 80.08 792 79.44 79.03 79.93 80.22 80.44 790 79.67 79.49 80.20 80.27 80.36 788 79.97 79.61 80.13 80.30 80.58 786 79.96 79.42 80.22 80.49 80.66 784 79.95 79.75 80.40 80.58 80.49 782 79.77 79.76 80.41 80.41 80.93 780 79.84 79.77 80.68 80.73 80.76 778 79.90 79.71 80.59 80.58 80.92 776 80.38 79.78 80.82 80.68 80.85 774 80.36 79.73 80.60 80.76 80.86 772 80.22 80.11 80.52 80.76 81.03 770 80.53 80.12 80.69 80.89 80.98 768 80.21 80.21 80.90 80.73 81.16 766 80.47 80.36 80.75 81.24 81.11 764 80.57 80.21 81.02 80.88 80.92 762 80.53 79.99 81.09 81.14 81.28 760 80.62 79.90 81.22 81.18 81.12 758 80.79 80.45 81.23 81.51 81.39 756 80.94 80.34 81.40 81.38 81.37 754 80.85 80.43 81.05 81.28 81.56 752 80.87 80.75 81.39 81.20 81.45 750 80.89 80.72 81.65 81.48 81.79 748 80.79 80.63 81.48 81.57 81.81 746 81.17 80.78 81.39 81.53 81.82 744 81.06 80.54 81.51 81.60 81.84 742 81.41 80.64 81.73 81.55 81.62 740 81.04 81.06 81.69 81.58 81.91 738 80.94 80.77 81.68 81.55 82.03 736 81.18 80.87 81.87 81.80 82.06 734 81.29 81.18 81.89 81.68 82.08 732 81.24 80.84 81.80 82.05 82.03 730 81.42 81.02 81.90 81.92 82.20 728 81.35 81.11 82.00 81.80 82.05 726 81.48 81.04 81.82 82.08 82.30 724 81.24 81.04 81.90 82.17 82.33 722 81.16 81.25 82.12 82.32 82.06 720 81.66 81.15 82.11 82.00 82.36 718 81.58 81.48 82.03 82.09 82.45 716 81.87 81.22 82.10 82.18 82.34 714 81.59 81.26 82.37 82.26 82.37 712 81.47 81.30 82.26 82.14 82.38 710 81.59 81.34 82.08 82.10 82.52 708 81.66 81.40 82.15 82.19 82.47 706 81.87 81.34 82.23 82.36 82.56 704 81.88 81.40 82.33 82.42 82.68 702 81.73 81.53 82.41 82.41 82.65 700 81.91 81.43 82.41 82.51 82.73 698 81.92 81.66 82.44 82.46 82.72 696 82.00 81.52 82.46 82.52 82.74 694 81.69 81.48 82.47 82.63 83.07 692 81.91 81.50 82.52 82.59 82.72 690 81.75 81.64 82.64 82.62 82.83 688 81.79 81.59 82.75 82.70 82.69 686 82.20 81.57 82.59 82.83 82.86 684 82.18 81.54 82.69 82.67 82.66 682 81.93 81.61 82.60 82.65 82.84 680 82.08 81.67 82.41 82.58 83.12 678 82.12 81.71 82.52 82.63 82.76 676 82.14 81.81 82.81 82.78 82.84 674 82.22 81.67 82.75 82.67 82.96 672 82.19 81.83 82.99 82.75 82.98 670 82.25 81.83 82.90 83.12 83.00 668 82.25 81.57 82.51 82.89 82.92 666 82.11 81.75 82.88 83.05 82.98 664 82.16 81.95 83.06 83.00 83.07 662 82.24 82.00 82.84 82.82 82.90 660 82.22 81.89 82.75 82.89 83.21 658 82.26 81.86 82.86 82.92 83.11 656 82.03 81.98 82.79 83.05 83.05 654 82.18 81.88 82.80 83.01 83.13 652 82.33 81.80 82.88 82.95 83.21 650 82.27 81.86 83.09 83.01 83.16 648 82.29 82.03 83.06 82.98 83.07 646 82.17 81.91 82.99 83.18 83.10 644 82.34 81.95 82.92 82.89 83.32 642 82.03 81.94 82.93 83.07 83.25 640 82.23 81.92 83.03 83.07 83.18 638 82.14 81.84 83.04 83.01 83.13 636 82.25 82.08 83.07 83.07 83.16 634 82.20 81.92 83.05 83.18 83.16 632 82.28 81.93 82.98 82.76 83.28 630 82.30 81.82 83.06 83.10 83.12 628 82.35 81.99 83.05 83.02 83.24 626 82.20 82.01 83.06 83.24 83.23 624 82.41 81.98 83.19 83.24 83.49 622 82.37 81.97 83.05 83.12 83.33 620 82.32 81.95 83.04 83.04 83.24 618 82.32 82.08 83.21 83.11 83.29 616 82.44 82.06 83.09 82.92 83.38 614 82.17 82.01 83.09 83.02 83.32 612 82.18 82.01 83.11 83.14 83.38 610 82.17 81.96 83.17 83.08 83.30 608 82.21 82.08 83.08 82.99 83.27 606 82.41 82.01 83.18 83.20 83.33 604 82.33 82.12 83.20 83.13 83.35 602 82.30 82.11 83.18 83.05 83.32 600 82.27 82.22 83.10 83.36 83.25 598 82.24 82.04 83.06 83.24 83.29 596 82.43 82.01 83.01 83.34 83.25 594 82.15 82.21 83.01 83.03 83.48 592 82.19 82.14 83.26 83.17 83.28 590 82.19 82.03 83.17 83.36 83.44 588 82.22 82.20 83.00 83.22 83.35 586 82.23 82.26 83.28 83.13 83.52 584 82.36 82.18 83.02 83.30 83.45 582 82.33 82.08 83.13 83.18 83.24 580 82.25 82.04 83.19 83.22 83.40 578 82.34 82.06 83.25 83.20 83.30 576 82.15 82.29 83.15 83.20 83.27 574 82.19 82.09 83.12 83.29 83.38 572 82.11 82.09 83.20 83.19 83.30 570 82.18 82.01 83.35 83.28 83.33 568 82.06 82.00 83.05 83.19 83.40 566 82.31 82.01 83.24 83.23 83.21 564 82.10 81.77 83.20 83.22 83.31 562 82.13 81.96 83.27 83.17 83.16 560 82.24 82.02 83.11 83.27 83.24 558 82.06 81.95 83.18 83.21 83.36 556 82.04 82.02 83.07 83.08 83.49 554 82.26 82.12 83.23 83.27 83.44 552 82.13 81.79 83.08 83.01 83.30 550 82.16 81.94 83.17 83.15 83.16 548 81.98 81.96 83.10 83.02 83.46 546 81.96 81.99 83.04 83.00 83.32 544 81.86 81.93 83.15 83.21 83.07 542 81.85 82.04 83.07 83.04 83.44 540 82.11 82.05 83.06 82.99 83.42 538 81.85 81.77 83.24 83.14 83.31 536 81.99 82.09 83.00 83.14 83.35 534 81.94 82.09 83.19 83.05 83.24 532 82.10 81.89 83.17 83.20 83.09 530 81.99 82.15 83.15 83.05 83.31 528 81.86 82.00 83.16 83.01 83.19 526 81.97 81.86 83.12 83.14 83.04 524 82.02 82.06 82.91 83.12 83.18 522 81.85 81.89 82.99 82.91 83.27 520 81.81 81.89 82.75 83.09 83.21 518 81.98 81.89 82.79 82.80 83.25 516 81.87 81.89 82.98 82.93 83.21 514 81.88 81.80 83.04 83.06 83.28 512 81.95 81.77 83.22 83.02 83.19 510 81.75 81.81 83.04 82.97 83.12 508 81.68 81.67 82.96 83.04 83.09 506 81.78 81.71 83.09 83.12 83.02 504 81.91 81.65 83.35 82.69 83.29 502 81.71 81.68 83.03 82.89 83.00 500 81.56 81.85 83.02 82.82 82.74 498 81.57 81.90 83.00 82.86 82.94 496 81.72 81.73 82.84 82.77 83.20 494 81.65 81.78 82.95 82.96 83.08 492 81.55 81.81 82.72 82.85 83.24 490 81.42 81.68 82.94 82.83 82.96 488 81.59 81.58 83.01 82.82 82.95 486 81.60 81.69 82.96 82.92 82.96 484 81.46 81.59 82.99 82.66 82.68 482 81.24 81.40 82.67 82.48 82.99 480 81.56 81.43 83.10 82.82 82.96 478 81.31 81.39 83.02 82.89 82.90 476 81.47 81.45 82.82 82.93 82.83 474 81.49 81.59 82.63 82.55 82.96 472 81.09 81.39 82.78 82.71 82.71 470 81.53 81.50 82.73 82.56 82.93 468 81.29 81.56 82.60 82.71 82.84 466 81.28 81.30 82.80 83.00 82.61 464 81.06 81.60 82.93 82.61 82.67 462 81.06 81.48 82.59 82.38 82.85 460 81.32 81.47 82.36 82.59 82.83 458 81.09 81.44 82.53 82.70 82.59 456 81.29 81.38 82.56 82.67 82.86 454 81.14 80.83 82.42 82.47 82.42 452 81.02 81.20 82.26 82.33 82.14 450 81.09 81.21 82.76 82.28 82.63 448 80.98 81.34 82.82 82.48 82.56 446 80.54 81.55 82.68 82.50 82.55 444 81.01 81.12 82.46 82.54 82.40 442 81.09 80.98 82.32 82.28 82.58 440 80.73 80.93 82.35 82.82 82.10 438 80.62 81.49 82.46 81.97 82.35 436 80.45 80.87 82.04 81.93 82.28 434 80.93 80.85 82.13 82.10 82.25 432 80.59 81.04 82.93 82.38 82.34 430 80.60 80.84 82.56 82.26 82.32 428 80.69 80.82 82.52 81.49 82.37 426 80.63 81.01 82.26 81.35 82.61 424 80.66 81.29 81.92 82.17 82.36 422 80.12 81.03 82.66 82.20 82.47 420 80.38 80.98 82.39 81.84 82.25 418 80.65 80.66 82.39 81.71 82.37 416 80.07 80.18 82.28 82.24 82.25 414 80.05 80.46 82.14 81.44 81.67 412 80.02 80.97 81.70 81.78 82.15 410 79.80 80.89 82.15 81.81 82.02 408 80.18 80.84 82.13 82.11 81.96 406 80.28 80.76 82.24 81.79 81.87 404 79.58 80.60 82.02 81.29 81.67 402 79.71 80.52 81.97 81.81 81.83 400 80.52 80.93 82.34 81.27 81.78 398 79.76 80.43 81.60 81.76 81.44 396 79.58 80.23 81.32 81.37 82.12 394 79.36 80.98 81.56 81.38 80.98 392 80.00 80.64 82.02 80.86 81.96 390 79.23 80.97 81.83 81.26 81.26 388 79.70 80.60 82.09 81.10 80.94 386 79.93 80.62 81.33 80.72 81.67 384 79.71 79.89 82.01 81.38 81.57 382 78.75 80.57 80.86 81.01 81.44 380 79.73 80.44 80.77 80.61 81.65 1650 93.19 92.64 92.94 92.99 93.16 1640 93.19 92.65 92.95 93.01 93.18 1630 93.20 92.65 92.96 93.00 93.18 1620 93.19 92.64 92.96 93.00 93.17 1610 93.19 92.64 92.96 93.01 93.18 1600 93.19 92.65 92.96 93.00 93.17 1590 93.16 92.62 92.95 92.99 93.17 1580 93.16 92.62 92.93 92.99 93.16 1570 93.15 92.59 92.93 92.98 93.15 1560 93.13 92.58 92.91 92.96 93.14 1550 93.10 92.55 92.90 92.94 93.12 1540 93.10 92.53 92.88 92.93 93.11 1530 93.06 92.51 92.87 92.91 93.09 1520 93.06 92.48 92.84 92.89 93.08 1510 93.02 92.46 92.82 92.87 93.05 1500 93.00 92.43 92.80 92.85 93.04 1490 92.98 92.41 92.78 92.83 93.02 1480 92.96 92.39 92.76 92.80 93.00 1470 92.92 92.36 92.74 92.78 92.98 1460 92.90 92.33 92.71 92.76 92.95 1450 92.86 92.29 92.69 92.74 92.93 1440 92.84 92.27 92.67 92.72 92.91 1430 92.80 92.22 92.63 92.68 92.88 1420 92.77 92.20 92.61 92.67 92.87 1410 92.74 92.17 92.59 92.62 92.83 1400 92.70 92.12 92.55 92.60 92.80 1390 92.66 92.09 92.52 92.57 92.77 1380 92.63 92.06 92.48 92.54 92.74 1370 92.59 92.03 92.46 92.50 92.71 1360 92.56 91.99 92.42 92.47 92.68 1350 92.51 91.94 92.38 92.44 92.64 1340 92.47 91.90 92.35 92.40 92.61 1330 92.43 91.85 92.31 92.36 92.56 1320 92.37 91.81 92.27 92.33 92.53 1310 92.32 91.76 92.23 92.28 92.49 1300 92.28 91.71 92.19 92.25 92.44 1290 92.23 91.66 92.14 92.20 92.40 1280 92.18 91.61 92.10 92.16 92.35 1270 92.13 91.56 92.05 92.11 92.32 1260 92.07 91.51 92.00 92.06 92.26 1250 92.01 91.45 91.95 92.01 92.20 1240 91.96 91.38 91.90 91.95 92.15 1230 91.88 91.32 91.84 91.90 92.11 1220 91.81 91.26 91.78 91.84 92.04 1210 91.75 91.18 91.72 91.78 91.98 1200 91.67 91.11 91.65 91.71 91.90 1190 91.59 91.03 91.58 91.63 91.84 1180 91.51 90.95 91.50 91.56 91.76 1170 91.43 90.86 91.42 91.50 91.69 1160 91.33 90.78 91.34 91.40 91.61 1150 91.25 90.68 91.26 91.32 91.53 1140 91.15 90.59 91.18 91.23 91.44 1130 91.04 90.48 91.07 91.13 91.33 1120 90.93 90.36 90.99 91.02 91.22 1110 90.81 90.24 90.85 90.92 91.12 1100 90.69 90.12 90.74 90.80 91.01 1090 90.55 89.99 90.62 90.67 90.87 1080 90.41 89.85 90.48 90.53 90.73 1070 90.24 89.69 90.33 90.39 90.59 1060 90.08 89.52 90.17 90.23 90.43 1050 89.88 89.34 89.99 90.05 90.26 1040 89.69 89.13 89.81 89.85 90.07 1030 89.49 88.95 89.61 89.66 89.88 1020 89.24 88.70 89.38 89.43 89.64 1010 88.98 88.45 89.15 89.19 89.41 1000 88.71 88.18 88.88 88.93 89.13 990 88.41 87.89 88.58 88.63 88.85 980 88.08 87.55 88.26 88.30 88.51 970 87.70 87.18 87.90 87.94 88.15 960 87.29 86.79 87.50 87.55 87.76 950 86.83 86.35 87.08 87.10 87.31