# 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 2018-08-15 (299 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 90.65 91.35 91.13 91.43 998 91.36 92.90 91.56 92.14 996 91.59 91.80 90.51 92.38 994 91.89 91.43 91.89 91.77 992 91.75 91.76 91.49 90.54 990 91.51 91.04 91.28 92.40 988 91.44 91.60 91.52 91.61 986 91.29 91.63 91.32 91.32 984 91.85 91.17 91.68 91.27 982 91.49 91.41 91.02 91.54 980 91.50 91.11 93.03 91.16 978 91.41 90.50 91.93 91.47 976 91.30 91.05 91.22 91.58 974 91.49 91.29 90.81 91.39 972 90.55 91.79 91.50 90.85 970 90.74 90.71 90.66 90.46 968 90.45 91.02 91.43 91.56 966 91.13 90.77 90.89 90.64 964 91.37 90.70 91.05 90.83 962 90.84 91.01 91.29 91.07 960 91.11 91.31 90.67 90.98 958 90.60 90.64 90.62 90.77 956 90.24 90.84 90.86 90.17 954 90.53 91.07 90.49 90.19 952 90.35 90.58 90.72 90.29 950 90.79 90.55 90.31 90.83 948 90.18 89.96 89.81 90.25 946 90.83 89.97 90.74 90.13 944 90.07 89.79 90.61 90.17 942 89.79 90.01 90.38 90.00 940 89.81 90.24 90.37 89.89 938 89.58 89.90 89.95 90.22 936 89.81 90.19 89.99 89.45 934 90.04 89.79 90.05 89.38 932 89.91 89.89 89.97 89.33 930 89.59 89.63 89.95 89.64 928 89.40 89.43 89.44 89.37 926 89.01 89.00 89.53 89.48 924 89.20 89.14 89.35 89.32 922 89.09 89.00 89.86 89.18 920 88.87 89.01 89.69 89.13 918 88.94 88.89 89.16 89.15 916 88.68 88.90 88.88 88.67 914 88.90 88.58 89.00 88.62 912 88.29 88.68 88.65 88.27 910 88.21 88.46 88.18 88.37 908 88.01 88.71 88.52 88.08 906 88.09 88.08 88.50 88.41 904 88.16 88.06 87.91 87.97 902 87.90 87.75 88.40 88.22 900 87.84 87.82 87.56 88.03 898 87.31 87.58 87.54 87.65 896 87.68 87.73 87.59 87.23 894 87.45 87.31 87.59 87.48 892 87.35 87.33 87.22 87.63 890 86.76 87.08 86.93 86.95 888 87.08 86.97 87.23 86.91 886 86.87 86.85 86.83 87.04 884 86.76 86.77 86.68 86.66 882 86.88 86.44 87.05 86.52 880 86.38 86.91 86.50 86.37 878 86.44 85.89 86.26 85.79 876 85.94 85.94 86.27 86.09 874 86.03 85.84 86.15 85.74 872 85.97 85.52 85.77 85.91 870 85.52 85.68 85.72 85.99 868 85.56 85.48 85.68 85.44 866 85.27 85.36 85.37 85.46 864 85.01 85.28 85.40 85.59 862 85.01 85.40 85.18 84.96 860 85.15 85.19 85.22 84.82 858 84.93 84.77 85.09 84.90 856 85.03 84.63 84.89 84.62 854 84.90 84.96 84.75 84.60 852 84.81 84.39 84.28 84.65 850 84.82 84.55 84.11 84.43 848 84.50 84.32 84.32 84.35 846 84.26 83.91 84.42 83.98 844 84.16 84.25 84.31 84.56 842 84.01 83.83 84.48 84.12 840 83.84 83.85 83.97 83.99 838 83.65 84.18 83.88 83.81 836 83.80 83.60 84.20 83.72 834 84.02 84.02 84.18 83.83 832 83.83 83.73 84.41 84.01 830 83.95 83.93 83.84 83.94 828 83.79 83.89 83.62 83.73 826 83.89 83.66 83.78 83.80 824 83.83 83.68 83.45 83.88 822 84.06 83.22 83.90 83.71 820 83.99 83.75 83.80 83.52 818 83.82 83.74 83.96 84.17 816 83.78 83.70 83.94 83.77 814 83.62 83.78 84.21 83.69 812 83.77 83.70 83.69 84.13 810 83.52 83.88 84.39 83.97 808 83.85 84.18 83.98 83.72 806 84.24 84.09 84.04 83.78 804 84.14 83.73 84.04 84.11 802 84.21 84.09 84.18 84.05 800 84.29 83.68 84.29 84.21 798 84.27 84.11 84.28 84.00 796 84.25 84.16 84.20 83.96 794 84.21 84.55 84.54 84.25 792 84.70 84.28 84.53 84.12 790 84.25 84.15 84.62 84.79 788 84.61 84.21 84.83 84.65 786 84.98 84.49 84.75 84.77 784 84.59 84.80 84.85 84.69 782 84.85 84.70 84.67 84.59 780 84.63 84.66 84.99 84.64 778 85.06 85.01 85.18 84.83 776 84.68 84.63 85.29 85.12 774 85.05 84.89 85.07 85.14 772 85.34 85.02 85.15 84.93 770 85.47 85.05 85.18 85.24 768 85.28 85.38 85.42 85.11 766 85.34 85.09 85.35 85.23 764 85.29 85.34 85.65 85.41 762 85.31 85.57 85.58 85.42 760 85.47 85.48 85.66 85.65 758 85.68 85.45 85.65 85.67 756 85.78 85.76 85.90 85.59 754 85.58 85.51 85.98 85.59 752 85.93 85.90 86.01 85.71 750 86.12 85.82 85.92 85.84 748 85.61 86.09 86.05 85.45 746 85.66 85.89 86.13 85.93 744 86.27 85.89 86.44 86.00 742 86.23 86.01 86.05 86.19 740 86.34 86.29 86.33 86.17 738 86.20 86.50 86.26 86.45 736 86.57 86.09 86.36 86.27 734 86.44 86.16 86.59 86.38 732 86.83 86.28 86.47 86.28 730 86.40 86.37 86.20 86.35 728 86.57 86.49 86.44 86.61 726 86.51 86.48 86.71 86.45 724 86.59 86.34 86.74 86.47 722 86.66 86.78 87.06 86.58 720 86.78 86.58 86.74 86.95 718 86.84 86.87 86.82 86.89 716 86.91 86.65 87.04 86.78 714 87.12 86.83 86.95 86.88 712 86.75 86.76 87.10 87.01 710 86.84 86.73 87.11 86.81 708 87.11 86.87 87.11 86.88 706 87.04 86.97 86.80 86.96 704 87.13 86.88 86.94 87.12 702 87.02 87.14 87.19 87.11 700 87.31 87.19 87.22 87.25 698 87.43 87.04 87.09 86.96 696 87.30 87.17 87.29 87.14 694 87.26 87.33 87.44 87.42 692 87.29 87.24 87.38 87.27 690 87.47 87.16 87.22 87.39 688 87.41 87.31 87.48 87.26 686 87.72 87.38 87.33 87.28 684 87.45 87.40 87.50 87.39 682 87.52 87.41 87.58 87.46 680 87.51 87.39 87.68 87.52 678 87.53 87.52 87.59 87.65 676 87.33 87.48 87.52 87.50 674 87.49 87.59 87.78 87.69 672 87.67 87.64 87.61 87.59 670 87.68 87.82 87.76 87.91 668 87.68 87.55 87.90 87.69 666 87.86 87.77 87.97 87.80 664 87.68 87.86 88.09 87.75 662 87.87 87.67 87.75 88.01 660 88.08 87.76 87.88 87.83 658 87.93 87.87 87.76 87.85 656 87.89 87.87 87.83 87.88 654 87.95 87.93 87.92 87.93 652 87.89 88.02 87.93 87.86 650 88.04 88.11 88.06 87.98 648 88.11 87.95 88.04 87.97 646 88.14 88.02 88.18 87.96 644 88.17 88.01 88.45 87.97 642 88.11 88.05 88.16 88.05 640 87.96 87.94 88.11 87.97 638 88.26 87.81 88.20 88.04 636 88.27 88.03 88.24 88.14 634 88.03 88.28 88.17 88.21 632 88.26 88.02 88.19 88.17 630 88.10 88.16 88.32 88.32 628 88.21 88.28 88.33 88.13 626 88.27 88.29 88.18 88.13 624 88.16 88.07 88.07 88.32 622 88.16 88.25 88.33 88.54 620 88.30 88.23 88.38 88.35 618 88.44 88.33 88.40 88.27 616 88.46 88.23 88.43 88.55 614 88.25 88.33 88.48 88.22 612 88.28 88.26 88.45 88.06 610 88.30 88.32 88.27 88.46 608 88.35 88.23 88.54 88.34 606 88.46 88.34 88.40 88.48 604 88.45 88.24 88.52 88.45 602 88.43 88.21 88.42 88.51 600 88.68 88.28 88.61 88.41 598 88.50 88.58 88.72 88.34 596 88.66 88.52 88.66 88.41 594 88.61 88.42 88.54 88.62 592 88.75 88.56 88.70 88.51 590 88.73 88.41 88.59 88.64 588 88.62 88.52 88.70 88.59 586 88.70 88.32 88.45 88.56 584 88.58 88.21 88.59 88.66 582 88.71 88.51 88.50 88.52 580 88.73 88.58 88.82 88.43 578 88.80 88.50 88.65 88.61 576 88.68 88.51 88.87 88.66 574 88.91 88.50 88.80 88.75 572 88.92 88.51 88.57 88.53 570 88.68 88.55 88.84 88.62 568 88.86 88.67 88.83 88.51 566 88.82 88.70 88.61 88.46 564 88.87 88.70 88.72 88.72 562 88.65 88.52 88.81 88.87 560 88.72 88.77 88.80 88.62 558 88.82 88.69 88.73 88.62 556 88.77 88.48 88.95 88.73 554 88.80 88.56 88.65 88.75 552 88.89 88.64 89.02 88.83 550 88.89 88.83 88.77 88.67 548 88.97 88.78 88.75 88.63 546 88.97 88.58 88.72 88.76 544 89.03 88.78 88.76 88.75 542 88.80 88.88 89.17 88.82 540 89.02 88.83 88.78 88.61 538 88.95 88.71 88.84 88.77 536 88.93 88.63 88.92 88.67 534 88.86 88.76 88.85 88.86 532 88.91 88.94 88.84 88.95 530 89.00 88.99 88.91 88.87 528 88.84 89.01 88.90 88.88 526 88.79 88.91 88.73 88.66 524 88.84 88.98 89.07 88.89 522 88.85 88.77 88.83 88.65 520 88.78 88.72 88.82 88.73 518 89.02 88.84 88.71 88.83 516 88.68 88.79 88.88 89.00 514 89.01 88.62 89.03 88.96 512 88.72 88.77 88.88 88.92 510 89.17 88.81 89.12 88.92 508 88.75 88.81 89.03 88.82 506 88.84 89.03 89.02 88.82 504 89.07 88.84 89.12 88.80 502 88.84 88.90 88.96 88.76 500 89.19 88.72 88.76 89.01 498 89.05 88.94 89.21 88.82 496 88.90 88.92 88.82 88.94 494 88.91 88.97 88.96 88.99 492 88.96 88.91 89.01 88.99 490 88.64 88.85 88.92 88.62 488 88.92 88.86 88.68 88.76 486 89.02 88.97 88.96 88.94 484 89.06 89.00 88.89 88.98 482 89.28 88.87 88.99 88.71 480 88.98 89.03 89.25 88.82 478 88.93 89.06 88.85 88.88 476 89.12 88.86 88.89 88.89 474 88.68 89.05 89.33 88.97 472 88.97 88.93 88.71 89.21 470 89.30 88.90 89.06 88.95 468 89.27 89.01 89.01 88.75 466 88.91 88.98 88.84 89.06 464 88.93 89.02 89.16 88.67 462 89.12 88.94 89.23 89.16 460 89.06 89.06 88.96 88.60 458 88.85 88.84 89.18 88.68 456 89.19 88.87 88.80 89.02 454 89.49 88.97 89.02 88.95 452 88.93 88.98 89.31 89.24 450 88.71 89.14 89.27 89.00 448 88.98 88.84 89.06 89.10 446 89.20 88.91 88.83 88.90 444 89.09 89.13 89.05 89.03 442 89.11 89.08 88.98 88.85 440 89.01 88.76 89.05 89.15 438 89.21 88.95 88.85 89.00 436 88.90 88.98 89.15 88.64 434 88.93 89.04 89.08 89.09 432 89.00 89.04 88.78 89.39 430 88.99 88.72 88.76 88.97 428 89.67 88.95 89.08 88.71 426 88.92 89.39 89.19 88.84 424 89.03 89.28 89.08 88.94 422 89.34 89.24 89.19 89.16 420 88.78 89.21 89.09 88.89 418 89.36 89.01 89.19 89.40 416 88.75 89.19 89.16 88.66 414 88.95 88.88 88.97 89.50 412 89.41 89.43 88.64 88.72 410 89.15 89.04 89.25 88.87 408 88.61 88.91 89.18 89.32 406 89.31 88.80 89.02 89.24 404 89.09 88.80 88.35 89.13 402 88.89 89.30 88.64 89.01 400 88.53 88.87 89.17 89.87 398 88.86 88.93 89.00 88.69 396 88.73 88.60 89.03 89.39 394 89.31 88.87 89.56 88.84 392 89.24 88.63 89.60 89.02 390 88.72 88.13 89.47 89.32 388 88.72 88.91 88.91 88.78 386 88.07 88.32 87.86 88.69 384 88.92 89.39 88.20 88.85 382 89.10 88.33 88.94 89.37 380 89.54 89.75 89.30 89.44 1650 95.47 95.60 95.72 95.55 1640 95.48 95.60 95.72 95.57 1630 95.48 95.60 95.73 95.58 1620 95.48 95.62 95.74 95.57 1610 95.49 95.62 95.73 95.58 1600 95.49 95.61 95.75 95.58 1590 95.49 95.62 95.74 95.57 1580 95.48 95.60 95.73 95.57 1570 95.48 95.60 95.71 95.57 1560 95.47 95.59 95.72 95.56 1550 95.46 95.57 95.70 95.55 1540 95.45 95.57 95.69 95.54 1530 95.45 95.56 95.68 95.53 1520 95.44 95.54 95.67 95.52 1510 95.42 95.54 95.67 95.51 1500 95.42 95.52 95.65 95.50 1490 95.40 95.52 95.64 95.49 1480 95.38 95.50 95.62 95.47 1470 95.37 95.47 95.62 95.46 1460 95.35 95.46 95.59 95.44 1450 95.33 95.43 95.58 95.42 1440 95.30 95.42 95.56 95.40 1430 95.30 95.40 95.54 95.38 1420 95.28 95.38 95.52 95.37 1410 95.26 95.37 95.50 95.35 1400 95.25 95.35 95.49 95.34 1390 95.23 95.33 95.47 95.31 1380 95.19 95.31 95.44 95.29 1370 95.16 95.26 95.41 95.25 1360 95.13 95.23 95.37 95.22 1350 95.09 95.20 95.34 95.18 1340 95.07 95.17 95.32 95.16 1330 95.04 95.15 95.29 95.12 1320 95.02 95.12 95.26 95.11 1310 94.99 95.09 95.24 95.08 1300 94.97 95.06 95.20 95.04 1290 94.94 95.03 95.18 95.02 1280 94.91 95.01 95.14 94.98 1270 94.87 94.96 95.10 94.96 1260 94.83 94.94 95.07 94.91 1250 94.81 94.89 95.03 94.88 1240 94.76 94.85 94.98 94.84 1230 94.73 94.81 94.94 94.79 1220 94.69 94.77 94.89 94.76 1210 94.64 94.72 94.85 94.71 1200 94.59 94.68 94.80 94.65 1190 94.53 94.62 94.74 94.60 1180 94.48 94.56 94.67 94.53 1170 94.43 94.49 94.62 94.48 1160 94.37 94.45 94.56 94.43 1150 94.32 94.39 94.50 94.36 1140 94.25 94.32 94.43 94.29 1130 94.17 94.25 94.35 94.22 1120 94.10 94.16 94.26 94.13 1110 94.00 94.07 94.18 94.05 1100 93.90 93.97 94.08 93.95 1090 93.81 93.86 93.96 93.83 1080 93.68 93.75 93.85 93.73 1070 93.57 93.62 93.72 93.61 1060 93.44 93.49 93.59 93.47 1050 93.30 93.35 93.45 93.32 1040 93.13 93.18 93.29 93.17 1030 92.96 93.00 93.12 92.99 1020 92.77 92.82 92.92 92.79 1010 92.56 92.61 92.70 92.60 1000 92.33 92.36 92.46 92.36 990 92.07 92.11 92.21 92.08 980 91.76 91.81 91.92 91.79 970 91.45 91.49 91.60 91.48 960 91.09 91.13 91.24 91.12 950 90.69 90.74 90.83 90.72