# 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 2019-06-05 (593 days after) # Measured two 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 1000 89.94 89.82 998 89.05 89.23 996 90.16 89.34 994 89.96 89.33 992 89.12 89.62 990 89.62 89.47 988 89.56 89.46 986 89.69 89.39 984 89.49 89.79 982 89.84 89.52 980 90.04 89.73 978 89.59 89.50 976 88.47 89.55 974 89.17 88.87 972 89.08 89.15 970 88.98 89.84 968 88.90 89.46 966 89.06 89.67 964 89.09 88.89 962 88.54 88.56 960 88.93 88.66 958 88.72 87.88 956 88.77 89.39 954 87.97 88.58 952 88.54 88.66 950 88.23 88.47 948 88.58 88.31 946 88.28 88.97 944 88.07 88.09 942 88.66 87.83 940 88.16 87.88 938 87.95 87.82 936 88.26 88.19 934 88.40 87.47 932 88.30 87.28 930 87.55 87.00 928 87.13 87.52 926 86.95 87.43 924 87.33 86.70 922 87.51 87.34 920 87.01 86.93 918 86.92 86.66 916 86.98 86.39 914 86.68 86.56 912 86.44 86.38 910 86.29 86.04 908 86.51 85.96 906 85.96 86.03 904 85.70 85.89 902 85.60 85.58 900 85.30 85.58 898 85.43 85.36 896 85.27 85.24 894 85.19 84.96 892 85.02 84.75 890 85.30 84.75 888 84.76 84.71 886 84.84 84.34 884 84.52 84.37 882 83.88 84.24 880 84.08 83.91 878 84.22 83.71 876 84.02 83.37 874 83.48 83.26 872 83.26 83.49 870 83.33 83.38 868 83.03 83.11 866 83.41 83.05 864 82.98 82.75 862 83.01 82.23 860 82.66 82.64 858 82.44 82.54 856 82.13 82.04 854 82.28 81.82 852 82.21 82.01 850 81.97 81.75 848 82.21 81.94 846 81.87 81.84 844 81.67 81.66 842 81.82 81.73 840 81.38 81.54 838 81.71 81.08 836 81.20 81.31 834 81.44 81.45 832 81.62 81.46 830 81.34 81.08 828 81.37 81.22 826 81.50 81.43 824 81.28 81.31 822 81.11 81.23 820 81.10 81.04 818 81.12 80.91 816 81.51 80.95 814 81.68 81.40 812 81.85 81.35 810 81.23 81.41 808 81.23 81.30 806 81.48 81.30 804 81.69 81.61 802 81.88 81.30 800 81.74 81.62 798 81.66 81.60 796 81.84 81.70 794 82.15 81.70 792 81.74 81.76 790 82.22 81.72 788 81.99 81.95 786 81.85 81.62 784 82.06 81.69 782 82.14 81.97 780 82.30 82.18 778 82.36 82.19 776 82.41 82.45 774 82.51 82.48 772 82.48 82.37 770 82.47 82.60 768 82.36 82.44 766 82.82 82.63 764 82.77 82.37 762 82.86 82.60 760 83.06 82.72 758 82.78 82.85 756 82.91 83.01 754 83.23 82.99 752 83.36 83.06 750 83.37 82.86 748 83.13 83.08 746 83.27 83.18 744 83.43 83.24 742 83.53 83.15 740 83.70 83.18 738 83.69 83.30 736 83.48 83.34 734 83.79 83.46 732 83.87 83.46 730 83.82 83.84 728 83.65 83.47 726 83.74 83.45 724 83.65 83.77 722 83.87 83.68 720 83.92 83.68 718 83.98 83.84 716 84.00 83.72 714 83.87 83.89 712 84.00 83.88 710 84.03 83.86 708 83.96 83.99 706 83.98 83.90 704 84.36 83.96 702 84.42 83.79 700 84.27 84.28 698 84.24 84.15 696 84.41 84.17 694 84.43 84.23 692 84.49 84.14 690 84.47 83.86 688 84.44 84.29 686 84.42 84.13 684 84.48 84.22 682 84.51 84.29 680 84.59 84.39 678 84.77 84.56 676 84.53 84.23 674 84.59 84.49 672 84.50 84.63 670 84.78 84.36 668 84.64 84.41 666 84.67 84.34 664 84.59 84.57 662 84.78 84.41 660 84.66 84.32 658 84.73 84.54 656 84.81 84.42 654 84.75 84.60 652 84.76 84.49 650 84.89 84.67 648 84.69 84.74 646 84.98 84.74 644 84.77 84.54 642 84.76 84.47 640 84.76 84.82 638 84.84 84.66 636 85.00 84.72 634 84.94 84.63 632 84.92 84.73 630 84.90 84.71 628 85.05 84.77 626 84.79 84.81 624 84.79 84.57 622 85.01 84.65 620 85.02 84.81 618 84.82 84.83 616 84.90 84.86 614 85.09 84.71 612 85.00 84.62 610 84.94 84.92 608 84.88 85.00 606 85.17 84.79 604 84.91 84.68 602 85.03 84.93 600 84.95 84.80 598 84.99 84.75 596 85.19 84.87 594 85.02 85.06 592 84.98 84.79 590 85.17 84.86 588 85.13 84.91 586 85.22 84.94 584 85.12 84.87 582 85.37 84.91 580 85.24 84.75 578 85.07 84.78 576 85.08 84.68 574 84.96 84.92 572 85.21 84.76 570 84.96 84.67 568 84.94 84.87 566 84.85 84.66 564 84.92 84.55 562 84.85 84.96 560 85.02 84.86 558 84.91 84.74 556 84.88 84.73 554 85.08 84.87 552 85.04 84.81 550 85.12 84.69 548 84.93 84.75 546 84.85 84.81 544 85.06 84.98 542 85.05 84.82 540 85.06 84.98 538 85.18 84.87 536 85.04 84.65 534 85.14 84.72 532 84.91 84.83 530 84.99 84.53 528 84.90 84.55 526 85.01 84.71 524 84.82 84.62 522 84.69 84.60 520 84.98 84.43 518 84.75 84.55 516 84.83 84.57 514 84.70 84.68 512 84.75 84.43 510 84.93 84.66 508 84.85 84.41 506 84.80 84.39 504 84.73 84.47 502 84.90 84.42 500 84.63 84.44 498 84.69 84.48 496 84.55 84.68 494 84.83 84.27 492 84.72 84.25 490 84.72 84.64 488 84.84 84.51 486 84.75 84.28 484 84.62 84.51 482 84.67 84.42 480 84.59 84.15 478 84.69 84.46 476 84.48 84.44 474 84.57 84.44 472 84.07 84.20 470 84.33 84.30 468 84.59 84.25 466 84.44 83.91 464 84.43 84.10 462 84.45 84.26 460 84.40 84.15 458 84.60 84.29 456 84.39 84.07 454 84.50 83.88 452 84.29 84.05 450 84.39 83.96 448 84.17 83.75 446 84.38 84.14 444 84.12 84.00 442 84.22 83.78 440 84.00 84.08 438 83.76 83.51 436 83.94 83.95 434 83.87 83.85 432 83.66 83.97 430 84.01 83.72 428 84.00 83.81 426 84.25 83.83 424 83.99 83.76 422 83.89 83.47 420 84.30 83.59 418 84.14 83.86 416 83.76 82.96 414 84.14 83.42 412 84.30 83.69 410 83.98 83.95 408 83.70 83.15 406 84.13 83.70 404 83.69 83.69 402 83.78 83.29 400 84.16 83.53 398 83.20 83.62 396 83.89 82.78 394 83.66 83.03 392 84.04 83.07 390 83.68 83.12 388 83.19 83.03 386 83.77 83.82 384 83.20 84.00 382 83.55 82.72 380 83.47 82.86 1650 94.66 94.57 1640 94.68 94.58 1630 94.68 94.58 1620 94.67 94.58 1610 94.68 94.58 1600 94.67 94.59 1590 94.67 94.57 1580 94.65 94.55 1570 94.64 94.54 1560 94.62 94.52 1550 94.61 94.51 1540 94.59 94.49 1530 94.57 94.47 1520 94.56 94.46 1510 94.53 94.43 1500 94.51 94.41 1490 94.49 94.39 1480 94.46 94.36 1470 94.44 94.33 1460 94.41 94.30 1450 94.38 94.27 1440 94.36 94.24 1430 94.33 94.22 1420 94.30 94.19 1410 94.28 94.16 1400 94.25 94.14 1390 94.23 94.11 1380 94.18 94.07 1370 94.12 94.00 1360 94.08 93.96 1350 94.03 93.92 1340 94.00 93.88 1330 93.96 93.84 1320 93.92 93.80 1310 93.88 93.77 1300 93.84 93.72 1290 93.80 93.68 1280 93.76 93.64 1270 93.70 93.59 1260 93.66 93.54 1250 93.61 93.49 1240 93.55 93.43 1230 93.49 93.38 1220 93.44 93.33 1210 93.38 93.26 1200 93.31 93.20 1190 93.24 93.12 1180 93.16 93.05 1170 93.09 92.97 1160 93.01 92.89 1150 92.95 92.81 1140 92.85 92.73 1130 92.76 92.63 1120 92.65 92.53 1110 92.55 92.42 1100 92.42 92.30 1090 92.30 92.17 1080 92.16 92.03 1070 92.01 91.88 1060 91.86 91.73 1050 91.68 91.55 1040 91.49 91.36 1030 91.29 91.16 1020 91.07 90.93 1010 90.83 90.70 1000 90.57 90.42 990 90.28 90.14 980 89.96 89.81 970 89.60 89.45 960 89.21 89.05 950 88.77 88.61