# 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 2019-03-11 (507 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 91.14 90.42 90.09 90.70 998 90.84 90.09 90.91 90.32 996 91.28 90.48 89.21 90.14 994 90.13 89.43 90.17 90.10 992 90.03 89.53 90.20 90.46 990 90.66 89.50 90.04 90.28 988 89.78 89.79 89.54 89.92 986 90.70 90.19 90.44 90.29 984 89.03 90.68 90.48 89.62 982 90.47 89.55 89.91 90.61 980 89.67 89.78 89.75 90.45 978 90.04 89.78 89.84 90.20 976 90.15 89.33 90.08 90.50 974 89.98 90.19 89.93 90.32 972 89.50 90.01 89.49 89.72 970 89.43 89.74 89.95 89.88 968 89.82 88.69 89.62 89.20 966 89.64 89.30 89.49 90.03 964 90.26 89.27 89.57 89.45 962 89.39 88.83 89.31 89.54 960 89.40 89.21 89.45 89.42 958 89.18 89.01 89.23 89.32 956 89.52 89.15 88.89 89.24 954 89.11 89.04 88.83 88.65 952 89.02 89.32 89.07 88.59 950 89.34 88.84 88.53 88.60 948 88.52 88.70 88.89 89.05 946 88.60 88.38 88.52 88.44 944 89.01 89.08 88.46 88.62 942 88.53 88.87 88.50 88.29 940 88.48 87.85 88.46 88.08 938 88.26 88.63 88.33 88.23 936 88.48 87.96 87.70 88.32 934 88.24 88.17 88.05 88.20 932 88.34 88.20 87.68 88.26 930 87.70 87.57 87.81 87.97 928 88.32 88.17 87.76 88.05 926 87.82 87.61 87.78 87.79 924 87.93 87.23 87.37 87.56 922 87.62 87.62 87.20 87.53 920 87.24 87.55 87.23 87.29 918 87.28 87.07 87.19 87.21 916 87.20 87.49 86.97 87.26 914 86.88 87.33 86.92 87.16 912 87.20 86.92 87.12 86.98 910 86.57 86.86 86.57 86.93 908 87.15 86.42 86.19 86.64 906 86.71 86.62 86.08 86.46 904 86.49 86.42 86.07 86.32 902 86.40 86.16 85.99 86.13 900 85.97 86.15 86.00 85.96 898 86.33 85.87 86.05 86.00 896 85.81 85.74 85.59 85.76 894 85.73 85.74 85.42 85.75 892 85.64 85.61 85.30 85.64 890 85.51 85.48 85.12 85.39 888 85.23 85.44 84.83 85.36 886 85.26 85.04 84.98 84.88 884 85.21 84.77 85.10 84.84 882 84.88 85.12 84.92 84.82 880 84.95 84.53 84.63 84.86 878 84.48 84.42 84.26 84.53 876 84.08 84.54 84.43 84.15 874 84.35 84.17 84.11 84.08 872 84.22 83.86 83.79 84.02 870 83.97 83.95 83.81 83.76 868 83.54 83.44 83.42 83.73 866 83.66 83.48 83.58 83.79 864 83.63 83.28 83.29 83.36 862 83.44 82.81 82.92 83.34 860 83.31 82.83 82.61 83.14 858 82.95 82.97 83.08 82.83 856 82.82 82.65 82.86 82.72 854 82.72 82.75 82.48 82.69 852 82.86 82.82 82.38 82.71 850 83.04 82.42 82.49 82.52 848 82.43 82.43 82.40 82.35 846 82.39 82.38 82.09 82.33 844 82.36 82.12 81.94 82.23 842 81.93 82.17 82.04 82.18 840 81.80 82.07 82.01 81.98 838 82.37 81.75 82.25 81.91 836 81.78 81.74 81.63 82.14 834 82.00 81.96 81.79 81.63 832 82.14 81.75 82.20 81.62 830 82.08 82.02 81.81 81.73 828 82.12 81.99 81.92 81.66 826 81.86 81.93 82.07 81.81 824 82.08 81.69 81.49 81.74 822 81.91 81.26 81.73 81.78 820 82.01 81.63 81.58 82.00 818 82.31 81.54 81.78 81.82 816 82.05 81.62 81.59 81.67 814 81.85 81.75 82.07 81.95 812 81.86 81.80 81.53 82.00 810 81.76 81.69 81.69 81.89 808 82.01 82.09 81.94 81.69 806 81.60 82.14 81.99 81.92 804 82.17 81.63 81.98 82.21 802 82.09 81.84 82.03 81.79 800 82.27 82.04 81.73 82.11 798 82.09 82.35 81.89 82.31 796 82.49 81.92 82.15 82.27 794 82.72 82.37 82.20 82.19 792 82.42 82.47 82.12 82.39 790 82.44 82.09 82.43 82.51 788 82.58 82.51 82.13 82.37 786 82.69 82.30 82.14 82.55 784 82.63 82.46 82.31 82.24 782 82.89 82.41 82.34 82.75 780 82.67 82.55 82.71 82.75 778 83.00 82.77 82.65 82.68 776 82.86 82.79 82.67 82.70 774 83.06 82.74 82.66 82.96 772 83.50 82.68 82.92 83.03 770 83.33 82.98 82.97 82.94 768 83.21 82.94 83.08 83.05 766 83.56 83.04 83.36 83.08 764 83.25 83.16 83.42 83.09 762 83.37 82.96 83.40 83.27 760 83.19 83.25 83.41 83.31 758 83.34 83.30 83.50 83.45 756 83.64 83.34 83.53 83.27 754 83.68 83.42 83.50 83.73 752 83.82 83.22 83.40 83.61 750 83.89 83.83 83.71 83.75 748 83.59 83.74 83.49 83.79 746 83.63 83.55 83.47 83.56 744 83.94 83.73 83.73 83.88 742 84.06 83.87 83.71 83.64 740 84.06 83.95 83.81 83.62 738 84.09 84.05 84.03 83.79 736 83.93 84.04 84.02 83.92 734 83.93 84.19 84.00 83.82 732 84.34 84.07 84.03 84.07 730 84.20 83.90 84.19 84.09 728 84.43 83.99 84.23 84.17 726 84.47 84.31 84.23 84.38 724 84.63 84.28 84.12 84.20 722 84.67 84.44 84.31 84.25 720 84.65 84.45 84.12 84.26 718 84.49 84.31 84.23 84.44 716 84.41 84.41 84.15 84.34 714 84.66 84.37 84.41 84.40 712 84.69 84.44 84.28 84.44 710 84.73 84.34 84.42 84.55 708 84.93 84.47 84.43 84.48 706 84.54 84.56 84.42 84.48 704 84.93 84.69 84.62 84.70 702 84.94 84.76 84.45 84.70 700 85.00 84.71 84.60 84.84 698 85.22 84.53 84.78 84.86 696 84.85 84.67 84.51 85.07 694 85.10 84.78 84.47 84.99 692 85.08 84.81 84.91 84.94 690 85.21 85.01 84.84 84.74 688 85.07 84.75 84.68 84.93 686 85.10 84.78 84.76 84.99 684 85.18 85.05 84.96 84.97 682 85.18 85.00 84.98 84.78 680 85.35 84.89 85.08 85.05 678 85.13 84.83 85.04 85.11 676 85.13 85.10 85.00 85.01 674 85.33 85.13 85.00 85.21 672 85.08 84.94 84.95 85.11 670 85.16 84.89 85.11 84.77 668 85.54 85.10 85.04 85.05 666 85.35 85.23 84.84 85.23 664 85.36 85.28 85.04 85.25 662 85.27 85.09 84.93 85.09 660 85.43 84.89 84.99 85.19 658 85.26 85.18 85.11 85.23 656 85.55 85.22 85.11 85.33 654 85.25 85.09 85.14 85.13 652 85.49 85.18 85.29 85.37 650 85.39 85.20 85.21 85.45 648 85.51 85.38 85.27 85.45 646 85.51 85.35 85.41 85.24 644 85.25 85.17 85.33 85.35 642 85.43 85.39 85.14 85.43 640 85.40 85.46 85.32 85.39 638 85.36 85.17 85.18 85.29 636 85.69 85.26 85.20 85.42 634 85.67 85.30 85.17 85.43 632 85.52 85.37 85.45 85.55 630 85.55 85.42 85.30 85.55 628 85.66 85.31 85.26 85.62 626 85.72 85.48 85.31 85.48 624 85.61 85.45 85.37 85.38 622 85.58 85.33 85.28 85.54 620 85.70 85.44 85.30 85.53 618 85.89 85.37 85.30 85.46 616 85.62 85.58 85.38 85.53 614 85.80 85.44 85.44 85.68 612 85.62 85.55 85.39 85.71 610 85.96 85.51 85.32 85.68 608 85.77 85.23 85.38 85.44 606 85.67 85.38 85.44 85.60 604 85.63 85.42 85.27 85.67 602 85.75 85.46 85.32 85.48 600 85.72 85.46 85.36 85.66 598 85.68 85.30 85.44 85.63 596 85.64 85.40 85.40 85.56 594 85.80 85.34 85.32 85.72 592 85.60 85.47 85.40 85.48 590 85.71 85.55 85.33 85.54 588 85.61 85.41 85.57 85.49 586 85.77 85.34 85.50 85.51 584 85.66 85.46 85.64 85.75 582 85.70 85.39 85.54 85.61 580 85.80 85.44 85.61 85.54 578 85.72 85.37 85.52 85.55 576 85.77 85.37 85.46 85.66 574 85.69 85.49 85.55 85.63 572 85.72 85.37 85.38 85.67 570 85.65 85.46 85.41 85.69 568 85.66 85.53 85.39 85.68 566 85.89 85.32 85.35 85.52 564 85.75 85.45 85.45 85.75 562 85.67 85.36 85.25 85.55 560 85.78 85.50 85.58 85.52 558 85.78 85.34 85.36 85.55 556 85.67 85.51 85.45 85.53 554 85.78 85.22 85.45 85.55 552 85.65 85.58 85.35 85.66 550 85.76 85.41 85.44 85.54 548 85.67 85.26 85.48 85.59 546 85.59 85.35 85.25 85.37 544 85.67 85.45 85.40 85.55 542 85.78 85.45 85.44 85.46 540 85.85 85.60 85.39 85.69 538 85.50 85.40 85.41 85.55 536 85.53 85.57 85.35 85.43 534 85.41 85.25 85.38 85.64 532 85.54 85.47 85.53 85.59 530 85.68 85.49 85.41 85.20 528 85.78 85.33 85.43 85.63 526 85.54 85.28 85.39 85.56 524 85.75 85.23 85.33 85.56 522 85.49 85.43 85.48 85.60 520 85.40 85.35 85.30 85.38 518 85.70 85.29 85.15 85.18 516 85.69 85.38 85.13 85.29 514 85.49 85.17 85.22 85.49 512 85.34 85.12 85.33 85.24 510 85.48 85.29 85.06 85.47 508 85.41 85.12 85.22 85.29 506 85.81 85.26 85.22 85.38 504 85.42 85.34 85.01 85.50 502 85.41 85.20 85.37 85.33 500 85.39 85.25 85.05 85.31 498 85.31 85.17 85.34 85.17 496 85.52 84.94 85.13 85.24 494 85.52 85.19 85.17 85.46 492 85.54 85.13 85.12 85.09 490 85.41 85.20 85.10 85.35 488 85.26 85.23 84.88 85.22 486 85.43 85.17 85.18 85.23 484 85.28 85.11 84.94 85.03 482 85.01 85.05 84.98 85.24 480 85.45 85.21 85.14 85.22 478 85.24 85.00 84.94 84.98 476 85.23 85.23 84.99 85.05 474 85.34 84.96 84.97 85.35 472 85.11 84.98 84.99 85.17 470 85.19 84.73 85.04 85.42 468 85.08 85.39 84.91 84.82 466 85.13 84.78 85.12 85.23 464 85.14 84.82 85.11 85.04 462 84.92 85.10 84.56 84.90 460 84.99 84.90 84.69 85.19 458 85.15 84.93 84.66 85.03 456 85.33 84.55 85.04 85.02 454 85.18 84.56 84.82 84.90 452 85.05 84.54 84.96 84.75 450 84.91 84.23 84.79 84.88 448 85.06 84.66 84.55 85.05 446 85.14 84.65 84.75 84.91 444 85.12 84.77 84.56 84.70 442 85.01 84.74 84.99 84.95 440 85.14 84.87 84.79 84.75 438 84.94 84.66 84.19 84.98 436 84.66 84.14 83.99 84.43 434 84.85 84.69 84.55 84.50 432 85.16 84.77 84.39 84.66 430 85.26 84.57 84.56 84.75 428 84.73 85.17 84.92 84.96 426 84.55 84.24 84.52 84.89 424 84.55 84.50 84.74 85.25 422 84.72 84.44 84.68 84.69 420 84.57 84.33 84.29 84.66 418 84.09 84.85 84.53 84.47 416 84.35 84.41 84.84 84.67 414 84.14 84.21 84.36 84.44 412 84.71 84.10 84.58 84.33 410 83.71 84.03 84.37 84.20 408 84.39 83.71 83.79 84.62 406 84.25 83.90 84.38 84.85 404 84.08 84.02 84.60 84.28 402 84.45 84.79 84.41 84.23 400 83.91 84.06 83.95 85.01 398 84.87 83.74 83.83 84.19 396 84.56 83.87 84.12 84.87 394 83.85 83.80 84.29 83.94 392 83.48 83.95 84.25 83.79 390 84.46 84.29 84.25 84.23 388 84.33 83.15 84.28 83.92 386 84.45 83.26 84.07 84.69 384 84.11 84.03 84.21 84.52 382 83.41 83.63 83.59 83.46 380 82.73 83.73 84.40 84.35 1650 95.30 95.26 95.14 95.19 1640 95.31 95.28 95.14 95.20 1630 95.31 95.28 95.14 95.22 1620 95.32 95.28 95.15 95.20 1610 95.31 95.28 95.13 95.20 1600 95.31 95.26 95.14 95.20 1590 95.30 95.27 95.14 95.19 1580 95.28 95.24 95.12 95.18 1570 95.28 95.24 95.11 95.16 1560 95.26 95.22 95.08 95.15 1550 95.24 95.20 95.07 95.13 1540 95.22 95.19 95.04 95.12 1530 95.20 95.16 95.04 95.09 1520 95.19 95.15 95.01 95.07 1510 95.16 95.12 95.00 95.05 1500 95.15 95.10 94.97 95.03 1490 95.12 95.07 94.95 95.01 1480 95.10 95.05 94.93 94.98 1470 95.07 95.02 94.90 94.96 1460 95.05 95.00 94.87 94.93 1450 95.02 94.97 94.84 94.90 1440 94.99 94.94 94.82 94.87 1430 94.97 94.91 94.79 94.84 1420 94.94 94.88 94.76 94.82 1410 94.91 94.86 94.73 94.79 1400 94.88 94.83 94.70 94.76 1390 94.86 94.81 94.67 94.73 1380 94.82 94.76 94.64 94.70 1370 94.76 94.70 94.58 94.64 1360 94.72 94.66 94.53 94.60 1350 94.69 94.61 94.50 94.56 1340 94.65 94.59 94.45 94.52 1330 94.62 94.54 94.43 94.48 1320 94.58 94.50 94.39 94.45 1310 94.53 94.47 94.34 94.41 1300 94.50 94.42 94.30 94.37 1290 94.46 94.38 94.26 94.33 1280 94.42 94.33 94.22 94.28 1270 94.37 94.29 94.17 94.23 1260 94.33 94.24 94.12 94.19 1250 94.28 94.19 94.07 94.14 1240 94.22 94.13 94.02 94.09 1230 94.17 94.08 93.96 94.04 1220 94.12 94.02 93.90 93.98 1210 94.05 93.96 93.85 93.92 1200 94.00 93.90 93.77 93.85 1190 93.92 93.82 93.70 93.78 1180 93.85 93.74 93.63 93.70 1170 93.78 93.67 93.55 93.63 1160 93.71 93.60 93.48 93.56 1150 93.63 93.51 93.40 93.48 1140 93.55 93.43 93.32 93.39 1130 93.45 93.33 93.22 93.30 1120 93.34 93.23 93.10 93.20 1110 93.23 93.12 93.00 93.08 1100 93.12 92.99 92.88 92.96 1090 92.99 92.87 92.75 92.84 1080 92.85 92.72 92.61 92.70 1070 92.71 92.57 92.46 92.55 1060 92.55 92.43 92.30 92.39 1050 92.38 92.24 92.12 92.22 1040 92.19 92.06 91.94 92.03 1030 92.00 91.85 91.74 91.83 1020 91.77 91.63 91.51 91.61 1010 91.54 91.39 91.27 91.37 1000 91.26 91.12 91.01 91.10 990 90.97 90.83 90.72 90.81 980 90.65 90.51 90.38 90.49 970 90.30 90.15 90.03 90.13 960 89.90 89.75 89.64 89.75 950 89.47 89.31 89.21 89.29