# 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 2026-03-04 (4095 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 86.77 86.35 86.33 998 86.77 86.44 86.58 996 87.92 87.57 86.31 994 86.92 86.42 87.42 992 87.41 86.40 87.97 990 86.23 86.44 86.76 988 87.16 86.57 86.68 986 86.57 86.61 87.05 984 86.76 86.71 87.50 982 86.85 87.49 87.00 980 87.36 87.33 86.45 978 87.23 87.50 86.50 976 87.96 87.03 87.36 974 86.61 87.29 86.87 972 86.72 86.90 87.14 970 86.97 87.33 86.52 968 86.53 87.56 87.18 966 86.40 87.46 85.98 964 86.96 87.84 87.54 962 87.16 86.74 87.26 960 87.26 86.34 86.26 958 87.38 86.86 85.75 956 87.33 86.94 87.12 954 86.97 86.42 86.85 952 87.08 86.76 86.75 950 87.00 87.07 86.49 948 86.87 87.20 86.16 946 86.47 86.97 86.83 944 87.41 86.50 86.85 942 86.62 86.47 86.97 940 87.16 87.00 86.67 938 87.50 87.00 86.75 936 86.55 86.82 86.79 934 87.08 87.07 86.07 932 87.00 86.30 86.46 930 87.20 86.97 86.67 928 86.94 86.27 86.30 926 87.21 86.83 86.85 924 86.55 86.76 86.72 922 86.49 87.37 86.41 920 86.55 86.12 86.24 918 86.50 87.23 86.37 916 86.91 86.50 86.24 914 86.46 86.88 86.24 912 86.40 86.18 86.20 910 86.46 85.79 86.31 908 86.83 86.27 85.76 906 86.93 86.20 86.10 904 86.32 86.94 85.94 902 86.61 86.52 86.08 900 86.05 86.27 85.55 898 86.69 85.94 85.62 896 86.35 86.15 86.20 894 86.16 86.28 85.38 892 86.62 86.10 85.56 890 86.23 86.25 85.83 888 86.15 86.27 85.50 886 86.32 85.87 85.75 884 86.02 85.74 85.90 882 85.96 85.99 85.61 880 86.08 86.09 85.60 878 85.82 85.71 85.73 876 85.94 85.82 85.52 874 85.64 85.48 85.44 872 85.99 85.64 85.37 870 85.66 85.61 85.64 868 85.72 85.85 85.45 866 85.62 85.65 85.10 864 85.83 85.62 85.04 862 85.62 85.27 84.90 860 85.93 85.52 85.27 858 85.69 85.52 85.01 856 85.14 85.66 85.06 854 85.37 85.60 84.96 852 85.14 85.39 84.56 850 85.34 85.01 84.79 848 85.19 85.25 84.48 846 85.42 85.06 84.52 844 85.10 84.95 84.24 842 84.84 84.92 84.67 840 84.84 84.84 84.71 838 84.75 85.04 84.63 836 84.92 84.74 84.49 834 84.43 84.73 84.43 832 84.97 84.50 84.61 830 84.51 84.38 84.33 828 84.41 84.30 84.35 826 84.35 84.39 84.10 824 84.41 84.32 83.97 822 84.77 84.67 84.09 820 84.19 84.45 84.12 818 84.16 84.51 84.31 816 84.32 84.26 83.72 814 83.93 84.05 83.81 812 84.12 84.12 83.47 810 84.50 83.73 83.93 808 84.00 83.97 83.77 806 84.19 83.62 83.41 804 83.83 83.63 83.13 802 83.95 83.99 83.18 800 84.22 83.46 83.16 798 83.95 83.51 83.18 796 84.00 83.37 83.14 794 83.64 83.51 83.28 792 83.24 83.40 82.94 790 83.71 83.50 82.74 788 83.06 83.05 82.78 786 83.50 83.26 82.68 784 83.09 82.92 82.52 782 83.28 83.20 82.48 780 83.17 82.96 82.48 778 83.01 82.79 82.39 776 83.12 82.96 82.33 774 83.04 82.58 82.24 772 82.70 82.77 82.06 770 82.91 82.61 82.09 768 82.69 82.41 81.98 766 82.25 82.52 81.85 764 82.37 82.27 81.98 762 82.49 82.30 81.75 760 82.49 82.09 81.98 758 82.30 82.17 81.50 756 82.17 82.09 81.68 754 81.99 82.11 81.65 752 82.18 81.82 81.29 750 81.81 81.80 81.23 748 81.71 81.96 81.12 746 81.64 81.58 81.06 744 81.59 81.42 80.80 742 81.67 81.59 81.01 740 81.56 81.31 80.97 738 81.38 81.05 80.85 736 81.44 80.85 80.56 734 81.21 81.13 80.61 732 81.10 80.72 80.50 730 81.10 80.71 80.52 728 80.93 80.74 80.23 726 80.81 80.75 80.39 724 81.10 80.82 79.96 722 80.80 80.49 79.95 720 80.77 80.54 79.63 718 80.83 80.26 80.03 716 80.35 80.02 79.89 714 80.37 80.00 79.67 712 80.36 80.15 79.22 710 80.25 79.82 79.39 708 80.03 79.40 79.76 706 79.81 79.63 79.40 704 79.73 79.69 78.93 702 79.54 79.71 78.77 700 79.58 79.51 78.63 698 79.60 79.42 78.81 696 79.23 78.98 78.81 694 79.48 78.84 78.64 692 79.32 78.96 78.40 690 79.04 78.78 78.34 688 79.08 78.65 78.36 686 78.81 78.75 77.85 684 78.71 78.61 77.90 682 78.62 78.36 77.85 680 78.50 78.32 77.62 678 78.50 78.13 77.50 676 78.44 78.03 77.44 674 78.33 78.00 77.41 672 78.02 77.81 77.40 670 77.97 77.66 76.94 668 77.92 77.66 76.88 666 77.66 77.14 76.91 664 77.68 77.24 76.84 662 77.67 77.07 76.40 660 77.40 76.94 76.34 658 77.36 76.85 76.32 656 77.16 76.75 75.86 654 76.95 76.47 75.89 652 76.73 76.17 75.67 650 76.44 76.00 75.36 648 76.17 75.87 75.27 646 76.18 75.73 75.08 644 76.06 75.58 74.87 642 76.03 75.45 74.79 640 75.92 75.26 74.73 638 75.72 75.33 74.48 636 75.46 74.96 74.37 634 75.41 74.92 74.35 632 75.21 74.69 74.30 630 75.10 74.63 74.19 628 75.11 74.55 73.80 626 74.94 74.28 73.85 624 74.98 74.52 73.78 622 74.88 74.12 73.79 620 74.74 74.04 73.43 618 74.39 74.01 73.47 616 74.38 73.94 73.20 614 74.15 73.75 73.16 612 74.22 73.46 73.02 610 73.77 73.44 72.81 608 73.82 73.28 72.71 606 73.79 73.02 72.66 604 73.64 72.99 72.40 602 73.27 72.78 72.37 600 73.22 72.70 72.17 598 73.25 72.49 71.93 596 73.13 72.43 71.85 594 72.93 72.20 71.69 592 72.82 71.80 71.56 590 72.70 72.04 71.33 588 72.30 71.79 71.21 586 72.12 71.47 71.17 584 72.12 71.36 70.78 582 71.88 71.06 70.69 580 71.69 70.82 70.56 578 71.56 70.85 70.32 576 71.36 70.54 70.03 574 71.15 70.32 69.81 572 71.03 70.47 69.55 570 70.82 69.98 69.73 568 70.70 69.96 69.31 566 70.52 69.72 69.26 564 70.26 69.27 68.88 562 70.07 68.98 68.75 560 69.84 68.87 68.78 558 69.65 68.75 68.30 556 69.53 68.67 68.04 554 69.12 68.37 68.05 552 69.09 67.88 67.67 550 68.92 67.98 67.43 548 68.62 67.64 67.26 546 68.40 67.53 67.00 544 68.08 66.86 66.90 542 67.88 66.90 66.58 540 67.69 66.78 66.43 538 67.41 66.23 66.07 536 67.13 66.10 65.90 534 67.17 65.95 65.76 532 66.77 65.60 65.42 530 66.38 65.37 65.12 528 66.24 65.03 64.92 526 66.04 64.67 64.59 524 65.53 64.54 64.49 522 65.30 64.37 63.98 520 65.23 63.90 63.98 518 64.67 63.81 63.60 516 64.52 63.37 63.26 514 64.15 63.08 62.99 512 64.01 62.81 62.71 510 63.82 62.47 62.38 508 63.29 62.23 61.87 506 63.11 61.77 61.83 504 62.78 61.42 61.38 502 62.52 61.26 61.33 500 62.27 60.81 60.86 498 61.86 60.61 60.67 496 61.34 60.23 60.20 494 61.05 59.86 60.14 492 61.04 59.50 59.54 490 60.40 59.14 59.39 488 60.31 58.62 59.03 486 59.92 58.49 58.63 484 59.33 58.29 58.22 482 58.86 57.72 57.94 480 58.58 57.32 57.55 478 58.34 56.88 57.05 476 58.05 56.47 56.77 474 57.50 56.19 56.39 472 56.92 55.56 56.18 470 56.80 55.11 55.79 468 56.42 55.07 55.27 466 55.90 54.29 55.00 464 55.57 54.07 54.49 462 54.93 53.40 53.88 460 54.66 53.09 53.60 458 54.11 52.26 53.05 456 53.60 51.92 52.78 454 53.02 51.22 52.36 452 52.29 51.23 51.87 450 51.78 50.50 51.31 448 51.52 50.17 50.67 446 51.11 49.70 50.46 444 50.65 48.81 50.11 442 49.95 48.48 49.66 440 49.48 47.89 48.83 438 48.94 47.09 48.28 436 48.26 46.87 48.13 434 47.79 46.17 47.56 432 47.43 45.77 46.71 430 46.51 45.28 46.40 428 46.13 44.55 45.89 426 45.56 44.02 45.25 424 45.20 43.74 44.62 422 44.25 43.02 43.98 420 43.79 42.69 43.93 418 43.59 42.36 43.60 416 42.77 41.55 42.95 414 41.95 40.69 42.44 412 42.11 40.18 42.15 410 41.33 39.86 41.43 408 40.84 39.69 40.80 406 41.05 39.50 40.37 404 40.45 38.77 40.61 402 40.43 38.50 40.27 400 39.89 38.32 39.53 398 39.19 38.54 39.28 396 39.74 37.51 39.77 394 39.37 36.87 39.77 392 39.15 37.46 38.91 390 39.19 37.35 38.48 388 38.99 37.47 38.91 386 38.35 36.53 38.07 384 38.56 35.88 37.70 382 37.72 36.74 38.76 380 37.99 37.17 38.65 1650 91.24 91.35 91.17 1640 91.22 91.34 91.18 1630 91.22 91.32 91.16 1620 91.21 91.29 91.14 1610 91.19 91.31 91.14 1600 91.18 91.27 91.12 1590 91.16 91.26 91.11 1580 91.13 91.25 91.09 1570 91.11 91.23 91.06 1560 91.11 91.22 91.04 1550 91.09 91.19 91.02 1540 91.07 91.18 91.01 1530 91.05 91.15 90.99 1520 91.04 91.13 90.97 1510 91.01 91.10 90.93 1500 90.99 91.09 90.91 1490 90.97 91.05 90.89 1480 90.94 91.04 90.87 1470 90.92 91.01 90.84 1460 90.90 90.99 90.81 1450 90.86 90.97 90.78 1440 90.85 90.93 90.76 1430 90.81 90.90 90.72 1420 90.79 90.87 90.68 1410 90.77 90.84 90.66 1400 90.73 90.81 90.63 1390 90.70 90.77 90.60 1380 90.67 90.75 90.56 1370 90.65 90.71 90.53 1360 90.61 90.67 90.49 1350 90.56 90.63 90.45 1340 90.53 90.59 90.42 1330 90.50 90.56 90.38 1320 90.46 90.51 90.34 1310 90.43 90.45 90.28 1300 90.38 90.42 90.25 1290 90.34 90.37 90.19 1280 90.30 90.33 90.16 1270 90.25 90.29 90.12 1260 90.21 90.24 90.07 1250 90.17 90.18 90.02 1240 90.12 90.14 89.98 1230 90.06 90.08 89.92 1220 90.01 90.02 89.86 1210 89.95 89.95 89.81 1200 89.89 89.91 89.74 1190 89.84 89.85 89.67 1180 89.78 89.78 89.60 1170 89.71 89.72 89.55 1160 89.65 89.66 89.47 1150 89.59 89.59 89.41 1140 89.53 89.53 89.35 1130 89.45 89.45 89.26 1120 89.38 89.37 89.18 1110 89.30 89.30 89.10 1100 89.22 89.22 89.01 1090 89.15 89.13 88.92 1080 89.06 89.04 88.81 1070 88.96 88.95 88.72 1060 88.88 88.86 88.61 1050 88.77 88.77 88.50 1040 88.67 88.66 88.39 1030 88.57 88.55 88.27 1020 88.46 88.43 88.16 1010 88.34 88.32 88.03 1000 88.20 88.18 87.91 990 88.09 88.04 87.76 980 87.95 87.92 87.63 970 87.81 87.80 87.48 960 87.67 87.63 87.32 950 87.52 87.46 87.14