# Subaru Telescope Infrared Tertiary Mirror In-Situ Measured Reflectivity # Coated with Silver on 2014-12-17 # Opened the vacuum chamber: No information # Measured with Subaru Portable Spectrophotometer (SPS) on 2024-08-12 (3526 days after) # Measured three times # Data between 950 nm and 1650 nm are also available (SPS-XWW). # Contact: Hirofumi Okita (okita14@naoj.org) # # Wavelength (nm) #1 #2 #3 1000 89.41 88.74 88.80 998 89.96 89.06 89.77 996 89.79 89.59 88.44 994 90.36 88.60 89.77 992 89.14 89.86 89.32 990 89.31 89.42 88.72 988 90.22 89.15 90.20 986 89.66 89.75 89.75 984 89.06 88.46 88.80 982 90.04 89.49 89.18 980 89.93 88.95 89.79 978 89.35 90.15 89.43 976 90.76 89.28 89.24 974 89.42 88.57 89.75 972 89.76 89.09 89.46 970 89.74 90.04 89.44 968 89.99 89.04 89.36 966 90.02 89.14 88.60 964 89.18 89.77 89.87 962 90.28 89.37 88.44 960 89.55 88.90 89.59 958 89.48 89.25 88.92 956 89.78 89.11 89.50 954 89.91 89.11 89.42 952 89.86 88.90 89.42 950 90.09 89.19 89.07 948 89.95 89.31 89.48 946 89.17 88.95 89.00 944 90.18 89.03 89.49 942 89.61 88.82 89.31 940 89.46 89.65 89.43 938 90.46 89.33 89.36 936 90.02 89.25 89.25 934 89.37 88.78 89.36 932 90.01 89.75 89.29 930 90.05 89.52 88.95 928 89.25 89.25 88.49 926 89.65 88.98 88.73 924 88.91 89.31 89.21 922 89.05 88.95 89.44 920 89.48 89.40 88.87 918 89.48 89.34 89.44 916 89.54 88.58 89.07 914 89.55 88.85 88.57 912 89.12 89.13 88.77 910 89.27 88.92 88.84 908 89.25 88.71 89.01 906 89.37 88.59 88.60 904 89.66 89.05 89.02 902 89.04 88.62 88.37 900 89.02 88.72 88.94 898 89.54 88.45 88.70 896 88.94 88.41 88.52 894 88.94 88.49 88.73 892 89.00 88.76 88.58 890 88.71 88.42 88.44 888 89.17 88.78 88.31 886 88.83 88.31 88.34 884 89.07 88.50 88.41 882 88.65 88.86 88.23 880 88.41 88.53 88.19 878 88.92 88.34 88.61 876 88.85 88.22 88.17 874 88.69 88.39 88.12 872 88.86 88.14 88.30 870 88.56 87.74 88.53 868 88.61 88.17 88.33 866 88.54 88.20 87.92 864 88.48 88.24 88.23 862 89.08 87.72 88.02 860 88.31 87.85 87.48 858 88.36 88.01 87.86 856 87.99 87.97 87.87 854 88.02 88.11 87.23 852 88.16 88.16 87.64 850 88.08 87.96 87.74 848 88.25 87.78 87.71 846 87.90 88.02 87.36 844 88.42 87.42 87.46 842 88.28 87.75 87.62 840 88.13 87.60 87.63 838 87.62 87.65 87.37 836 87.76 87.62 87.13 834 88.01 87.50 87.11 832 87.83 87.51 87.04 830 87.62 87.25 87.34 828 87.25 87.24 87.35 826 87.63 87.66 86.93 824 88.17 86.99 86.93 822 87.76 87.39 86.46 820 87.31 87.20 86.97 818 87.40 87.24 86.86 816 87.23 86.85 86.62 814 87.01 86.92 86.58 812 87.49 86.60 86.67 810 87.09 87.34 86.79 808 86.91 86.73 86.36 806 87.18 86.68 86.10 804 87.38 87.00 86.46 802 86.91 86.96 86.39 800 86.77 86.44 86.65 798 87.04 86.45 86.63 796 87.09 86.93 86.10 794 86.91 86.33 86.36 792 86.82 86.43 85.99 790 86.59 86.41 86.10 788 86.62 86.48 85.93 786 86.33 86.48 86.00 784 86.77 86.51 85.69 782 86.29 86.10 85.97 780 86.70 86.23 85.82 778 86.32 85.89 85.62 776 86.66 86.17 85.78 774 86.03 86.08 85.65 772 86.10 85.94 85.69 770 86.30 85.84 85.18 768 86.12 85.80 85.37 766 86.01 85.61 85.28 764 86.00 85.40 85.32 762 85.99 85.55 85.33 760 85.60 85.56 84.83 758 85.89 85.30 85.01 756 85.97 85.15 84.89 754 85.55 85.23 84.88 752 85.80 85.22 84.66 750 85.26 84.88 84.47 748 85.31 84.75 84.68 746 85.30 84.95 84.52 744 85.11 84.68 84.56 742 85.10 84.80 84.36 740 85.10 84.49 84.30 738 84.77 84.58 84.04 736 85.01 84.55 84.40 734 84.61 84.41 84.03 732 84.61 84.34 84.15 730 84.54 84.15 84.03 728 84.85 83.95 83.95 726 84.21 84.14 83.92 724 84.33 84.12 83.41 722 84.50 83.86 83.52 720 84.17 83.85 83.41 718 83.89 83.89 83.34 716 84.04 83.65 83.54 714 83.86 83.38 83.37 712 83.83 83.61 83.16 710 83.78 83.13 82.95 708 83.49 83.31 82.94 706 83.41 83.25 82.80 704 83.52 83.09 82.74 702 83.34 83.25 82.57 700 83.16 83.18 82.75 698 83.28 82.85 82.48 696 83.05 82.79 82.29 694 82.91 82.62 82.32 692 82.86 82.44 82.03 690 82.75 82.49 82.07 688 82.71 82.46 81.91 686 82.77 82.20 81.78 684 82.66 82.22 81.73 682 82.49 82.20 81.64 680 82.23 81.88 81.62 678 82.33 81.87 81.53 676 82.07 81.77 81.26 674 82.14 81.67 81.19 672 81.75 81.38 80.87 670 81.95 81.32 80.96 668 81.85 81.38 81.11 666 81.68 81.22 80.86 664 81.55 81.23 80.80 662 81.28 80.84 80.45 660 80.99 80.88 80.20 658 81.12 80.55 80.26 656 80.99 80.41 80.05 654 80.56 80.29 79.93 652 80.63 80.05 79.65 650 80.23 79.87 79.48 648 79.94 79.74 79.38 646 79.94 79.59 79.13 644 79.97 79.43 79.16 642 79.81 79.26 79.01 640 79.66 79.23 78.91 638 79.68 79.17 78.86 636 79.37 78.94 78.60 634 79.38 78.93 78.50 632 79.21 78.70 78.43 630 79.19 78.75 78.29 628 79.14 78.53 78.20 626 78.95 78.33 78.02 624 78.85 78.37 77.91 622 78.67 78.13 77.81 620 78.63 78.17 77.77 618 78.51 77.97 77.74 616 78.47 77.96 77.53 614 78.40 77.75 77.44 612 78.01 77.62 77.08 610 77.99 77.53 77.17 608 77.87 77.59 76.88 606 77.63 77.34 76.72 604 77.60 77.17 77.17 602 77.43 76.95 76.89 600 77.49 76.72 76.49 598 77.16 76.57 76.36 596 77.01 76.52 76.21 594 76.94 76.41 76.16 592 76.89 76.23 76.13 590 76.74 76.15 75.58 588 76.41 75.96 75.56 586 76.15 75.80 75.50 584 76.26 75.57 75.24 582 76.26 75.15 75.14 580 75.85 75.38 74.85 578 75.79 74.97 74.77 576 75.44 74.86 74.55 574 75.51 74.77 74.44 572 75.21 74.68 74.21 570 75.04 74.45 74.12 568 74.87 74.30 74.05 566 74.54 74.02 73.66 564 74.58 73.95 73.75 562 74.40 73.67 73.33 560 74.33 73.39 73.31 558 73.93 73.30 73.11 556 73.81 73.06 72.93 554 73.72 72.99 72.68 552 73.40 72.85 72.50 550 73.10 72.52 72.18 548 72.94 72.30 71.91 546 72.84 72.26 71.91 544 72.54 72.02 71.84 542 72.58 71.79 71.40 540 72.26 71.49 71.30 538 71.99 71.13 71.02 536 71.67 70.96 70.63 534 71.44 70.87 70.35 532 71.41 70.57 70.34 530 70.98 70.37 70.05 528 70.85 70.02 69.73 526 70.60 69.80 69.53 524 70.25 69.45 69.43 522 70.29 69.38 68.92 520 69.74 69.18 68.69 518 69.55 68.93 68.63 516 69.45 68.70 68.32 514 69.09 68.00 67.89 512 68.85 68.03 67.83 510 68.40 67.48 67.72 508 68.58 67.57 67.21 506 67.96 67.35 67.09 504 67.86 66.94 66.87 502 67.61 66.63 66.32 500 67.30 66.44 65.96 498 66.62 65.80 65.62 496 66.72 65.76 65.39 494 66.25 65.46 65.21 492 66.05 65.00 64.96 490 65.61 64.79 64.71 488 65.32 64.41 64.27 486 64.87 64.24 63.82 484 64.70 63.89 63.63 482 64.25 63.38 63.46 480 63.93 62.92 62.83 478 63.72 62.74 62.71 476 63.60 62.60 62.09 474 62.88 62.16 61.87 472 62.31 61.66 61.80 470 62.44 61.18 61.16 468 61.93 60.82 60.75 466 61.65 60.52 60.45 464 61.06 60.26 60.19 462 60.46 59.58 59.91 460 60.18 59.75 59.19 458 59.81 58.99 58.90 456 59.30 58.69 58.51 454 58.68 58.13 57.99 452 58.50 57.68 57.48 450 58.25 57.40 57.02 448 57.51 56.80 56.84 446 57.20 56.48 55.98 444 56.70 56.22 55.90 442 56.38 55.53 55.14 440 55.71 54.89 54.73 438 55.03 54.37 53.86 436 54.47 53.98 53.51 434 54.16 53.43 52.76 432 53.53 52.76 52.70 430 52.64 52.23 51.94 428 52.09 52.12 51.22 426 51.85 51.42 50.60 424 50.94 50.48 50.36 422 50.77 50.05 49.31 420 50.18 49.02 49.11 418 49.71 48.90 48.60 416 49.05 48.76 47.95 414 48.00 48.19 46.72 412 47.63 47.06 47.27 410 47.08 47.07 46.17 408 47.01 46.29 46.00 406 46.23 45.94 45.00 404 45.88 45.14 44.85 402 45.30 44.94 44.54 400 44.96 44.34 44.30 398 44.79 44.65 44.42 396 43.09 42.84 42.92 394 44.06 44.11 43.27 392 43.86 43.31 42.78 390 43.66 43.53 42.58 388 43.01 42.35 42.79 386 43.11 42.89 41.74 384 42.71 42.29 41.78 382 42.28 42.22 41.69 380 42.34 41.89 41.92 1650 93.09 92.74 92.66 1640 93.09 92.73 92.64 1630 93.06 92.73 92.64 1620 93.07 92.72 92.63 1610 93.06 92.70 92.63 1600 93.05 92.70 92.59 1590 93.03 92.68 92.59 1580 93.03 92.65 92.57 1570 93.01 92.65 92.56 1560 92.99 92.64 92.55 1550 92.99 92.62 92.53 1540 92.97 92.59 92.52 1530 92.96 92.60 92.51 1520 92.94 92.58 92.50 1510 92.93 92.57 92.47 1500 92.91 92.54 92.45 1490 92.90 92.53 92.44 1480 92.87 92.51 92.41 1470 92.85 92.49 92.40 1460 92.84 92.46 92.38 1450 92.82 92.46 92.36 1440 92.80 92.43 92.33 1430 92.78 92.40 92.31 1420 92.76 92.39 92.28 1410 92.73 92.36 92.26 1400 92.71 92.35 92.24 1390 92.68 92.32 92.20 1380 92.66 92.30 92.18 1370 92.63 92.26 92.15 1360 92.61 92.24 92.11 1350 92.58 92.20 92.09 1340 92.55 92.16 92.06 1330 92.52 92.15 92.03 1320 92.49 92.10 91.99 1310 92.47 92.07 91.96 1300 92.43 92.04 91.92 1290 92.39 92.01 91.89 1280 92.36 91.96 91.85 1270 92.32 91.93 91.81 1260 92.28 91.89 91.79 1250 92.25 91.85 91.73 1240 92.20 91.81 91.69 1230 92.17 91.78 91.64 1220 92.13 91.72 91.60 1210 92.08 91.68 91.55 1200 92.04 91.63 91.50 1190 92.00 91.58 91.44 1180 91.95 91.53 91.39 1170 91.89 91.48 91.35 1160 91.84 91.43 91.29 1150 91.80 91.37 91.25 1140 91.74 91.33 91.19 1130 91.68 91.26 91.13 1120 91.62 91.21 91.07 1110 91.57 91.13 90.99 1100 91.50 91.09 90.95 1090 91.44 91.01 90.88 1080 91.36 90.94 90.81 1070 91.30 90.86 90.72 1060 91.22 90.79 90.65 1050 91.13 90.72 90.58 1040 91.03 90.63 90.49 1030 90.97 90.55 90.40 1020 90.88 90.45 90.32 1010 90.77 90.35 90.22 1000 90.68 90.27 90.11 990 90.56 90.16 90.01 980 90.47 90.05 89.89 970 90.34 89.94 89.77 960 90.22 89.84 89.66 950 90.07 89.70 89.54