# Subaru Telescope Primary Mirror In-Situ Measured Reflectivity # Coated with Aluminum on 2022-08-04 # Opened the vacuum chamber on 2022-08-08 # Measured with Subaru Portable Spectrophotometer (SPS) on 2024-03-05 (579 days after) # Measured three 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 1000 90.86 91.10 91.43 998 91.06 91.34 90.58 996 90.23 91.06 90.87 994 90.01 91.13 90.31 992 90.75 90.91 91.20 990 91.06 91.15 91.23 988 91.03 91.13 91.26 986 90.20 90.15 91.80 984 90.36 91.23 91.18 982 90.82 90.39 91.19 980 90.80 89.75 91.55 978 91.31 90.97 90.59 976 90.41 90.60 90.58 974 90.64 90.98 90.76 972 90.47 90.97 90.32 970 90.38 90.52 90.47 968 91.07 90.41 90.64 966 90.13 89.90 91.15 964 90.32 90.59 90.76 962 90.01 90.11 89.53 960 90.65 90.25 90.90 958 90.78 90.02 90.79 956 90.01 90.21 90.26 954 89.45 90.40 90.29 952 88.93 90.23 90.53 950 89.33 90.40 90.26 948 89.64 89.42 90.15 946 89.92 89.51 90.20 944 89.53 88.71 89.33 942 89.62 88.97 89.95 940 89.20 89.22 89.62 938 88.78 89.17 89.44 936 88.98 88.85 89.22 934 89.08 89.40 89.28 932 88.98 89.31 88.97 930 88.66 88.74 89.15 928 88.38 88.61 88.91 926 88.45 88.61 89.06 924 88.74 88.26 88.36 922 88.14 88.25 88.59 920 88.30 87.75 88.72 918 87.81 88.45 88.39 916 87.51 88.11 88.55 914 88.10 87.91 88.23 912 88.08 87.70 87.81 910 87.75 87.52 88.05 908 87.40 87.62 87.31 906 87.26 87.49 87.54 904 87.33 86.88 87.42 902 87.25 86.99 87.40 900 86.84 87.19 87.49 898 86.78 86.72 87.11 896 86.91 86.74 86.59 894 86.47 86.66 86.63 892 86.26 86.61 86.66 890 86.33 86.35 86.34 888 86.44 86.33 86.28 886 86.15 85.98 86.24 884 85.55 85.83 85.92 882 85.78 85.59 85.91 880 85.37 85.63 85.33 878 85.61 85.59 85.29 876 84.95 84.96 85.57 874 85.07 85.12 84.97 872 84.70 84.90 84.75 870 84.96 84.87 85.23 868 84.59 84.91 85.00 866 84.30 84.61 84.88 864 84.48 84.53 84.60 862 84.07 83.92 84.23 860 84.36 84.03 84.11 858 84.02 83.74 84.31 856 83.81 83.79 83.80 854 83.55 83.83 84.05 852 83.36 83.47 83.81 850 83.56 83.59 83.89 848 83.67 83.30 83.37 846 83.59 83.54 83.56 844 83.41 83.34 83.70 842 83.10 82.93 83.38 840 82.79 83.25 83.23 838 82.96 83.05 83.56 836 83.37 83.03 83.54 834 83.23 83.23 83.43 832 82.95 82.86 83.38 830 82.94 83.07 83.34 828 83.37 83.11 83.21 826 82.89 83.26 82.91 824 83.07 82.47 83.24 822 82.81 82.91 83.00 820 82.92 82.82 82.92 818 83.27 82.91 82.93 816 82.52 83.25 83.29 814 83.06 83.32 83.11 812 83.03 83.05 83.41 810 83.40 83.32 83.01 808 83.40 83.12 83.19 806 83.37 83.52 83.73 804 83.40 83.31 83.28 802 83.36 83.12 83.55 800 83.48 83.20 83.95 798 83.78 83.79 83.79 796 83.54 83.56 83.61 794 83.68 83.56 83.49 792 83.67 83.55 83.81 790 83.74 84.21 83.81 788 83.99 83.75 83.97 786 83.80 84.22 84.34 784 84.02 84.11 84.27 782 84.05 84.11 84.52 780 83.92 84.32 84.61 778 84.58 84.61 84.42 776 84.76 84.30 84.49 774 84.39 84.78 84.53 772 84.56 84.68 84.69 770 84.46 84.65 85.05 768 84.76 84.87 84.93 766 84.74 84.91 85.13 764 84.96 84.88 84.97 762 85.11 84.83 85.23 760 85.03 84.82 85.07 758 85.25 85.08 85.17 756 84.91 85.27 85.30 754 85.35 85.19 85.35 752 85.19 85.64 85.51 750 85.32 85.13 85.63 748 85.48 85.33 85.40 746 85.65 85.29 85.42 744 85.71 85.47 85.59 742 85.83 85.84 85.82 740 85.79 85.73 86.21 738 85.77 85.61 86.15 736 85.72 85.80 86.01 734 86.03 85.81 85.90 732 85.90 85.73 86.20 730 85.98 86.05 86.19 728 85.98 85.95 86.25 726 86.14 86.00 86.18 724 86.10 86.12 86.25 722 86.18 86.12 86.51 720 86.18 86.42 86.31 718 86.43 86.32 86.37 716 86.14 86.15 86.56 714 86.44 86.42 86.44 712 86.71 86.67 86.43 710 86.56 86.53 86.67 708 86.65 86.46 86.64 706 86.56 86.48 86.95 704 86.73 86.38 86.68 702 86.89 86.67 86.82 700 86.82 86.80 86.86 698 86.74 86.95 86.73 696 86.82 86.75 86.97 694 86.48 86.72 86.87 692 87.08 86.99 87.19 690 86.92 86.68 87.30 688 86.74 87.08 87.15 686 86.94 86.98 87.10 684 87.01 87.03 87.12 682 87.19 87.00 87.18 680 87.25 87.08 87.30 678 87.15 87.01 87.35 676 87.35 87.14 87.07 674 87.10 87.34 87.43 672 87.18 87.29 87.38 670 87.28 87.34 87.44 668 87.39 87.24 87.30 666 87.26 87.45 87.49 664 87.45 87.27 87.60 662 87.14 87.55 87.32 660 87.37 87.41 87.46 658 87.38 87.46 87.78 656 87.38 87.38 87.64 654 87.58 87.52 87.61 652 87.44 87.45 87.58 650 87.48 87.63 87.60 648 87.64 87.50 87.71 646 87.68 87.70 87.39 644 87.64 87.78 87.63 642 87.75 87.64 87.64 640 87.61 87.62 87.91 638 87.83 87.73 88.16 636 87.73 87.83 87.88 634 87.85 87.89 87.61 632 87.81 87.76 87.95 630 87.68 87.77 87.95 628 87.76 87.95 87.78 626 87.93 87.96 88.04 624 87.80 87.75 88.27 622 87.88 87.78 87.96 620 87.88 87.87 87.93 618 87.90 88.06 88.04 616 87.92 87.86 88.04 614 88.00 88.03 88.14 612 87.87 87.97 88.01 610 88.09 88.14 88.12 608 87.94 88.07 88.08 606 88.09 88.11 88.25 604 87.96 87.98 88.10 602 88.20 88.11 88.27 600 88.03 88.04 88.15 598 88.09 88.24 88.32 596 88.26 88.13 88.40 594 88.35 88.26 88.10 592 88.33 88.29 88.23 590 88.01 88.04 88.31 588 88.05 88.06 88.22 586 88.13 88.14 88.08 584 88.33 88.01 88.13 582 88.27 88.30 88.03 580 88.18 88.35 88.32 578 88.28 88.30 88.45 576 88.26 88.15 88.26 574 88.46 88.19 88.34 572 88.36 88.19 88.33 570 88.42 88.12 88.32 568 88.06 88.18 88.51 566 88.36 88.28 88.33 564 88.34 88.21 88.47 562 88.40 88.43 88.35 560 88.42 88.41 88.48 558 88.22 88.45 88.56 556 88.42 88.32 88.54 554 88.42 88.28 88.49 552 88.60 88.50 88.39 550 88.36 88.32 88.66 548 88.37 88.58 88.48 546 88.58 88.43 88.70 544 88.41 88.40 88.67 542 88.48 88.34 88.52 540 88.46 88.43 88.58 538 88.37 88.29 88.65 536 88.49 88.50 88.54 534 88.30 88.51 88.67 532 88.28 88.72 88.54 530 88.33 88.40 88.49 528 88.57 88.63 88.58 526 88.35 88.56 88.74 524 88.54 88.52 88.57 522 88.63 88.40 88.48 520 88.59 88.46 88.65 518 88.37 88.64 88.63 516 88.43 88.42 88.62 514 88.44 88.49 88.63 512 88.57 88.44 88.70 510 88.45 88.59 88.47 508 88.25 88.35 88.73 506 88.33 88.55 88.44 504 88.84 88.69 88.43 502 88.43 88.61 88.58 500 88.48 88.53 88.61 498 88.47 88.61 88.69 496 88.82 88.49 88.91 494 88.71 88.53 88.73 492 88.64 88.50 88.67 490 88.65 88.62 88.61 488 88.77 88.45 88.71 486 88.93 88.67 88.42 484 88.74 88.41 88.87 482 88.74 88.69 88.71 480 88.67 88.67 88.93 478 88.43 88.63 88.81 476 88.64 88.53 88.70 474 88.82 88.47 88.75 472 88.47 88.71 88.82 470 88.42 89.11 88.73 468 88.49 88.48 88.77 466 88.45 88.54 88.40 464 88.56 88.63 88.52 462 88.53 88.62 88.99 460 88.64 88.48 88.61 458 88.61 88.39 88.67 456 88.41 88.18 88.47 454 88.62 88.55 88.63 452 88.58 88.67 88.75 450 88.45 88.79 88.30 448 88.65 88.51 88.53 446 88.17 88.72 88.64 444 88.50 88.32 88.48 442 88.44 88.13 88.68 440 88.74 88.59 89.00 438 88.52 88.74 88.75 436 88.77 88.69 88.68 434 88.79 88.53 88.68 432 88.44 88.48 88.65 430 88.62 88.34 89.11 428 88.90 88.50 89.26 426 89.05 88.79 88.73 424 88.83 88.70 88.61 422 88.25 88.75 88.32 420 88.39 88.65 88.84 418 88.52 88.75 89.15 416 88.43 88.34 88.84 414 88.63 89.14 88.44 412 88.72 88.22 88.91 410 88.76 88.80 88.67 408 88.09 88.75 88.91 406 88.30 89.21 89.00 404 87.93 88.76 88.82 402 87.92 88.36 88.16 400 88.85 88.42 88.63 398 88.53 88.97 88.38 396 87.32 88.51 88.77 394 88.23 88.40 88.80 392 88.71 88.58 89.03 390 88.31 87.38 88.36 388 88.64 88.51 88.52 386 88.85 88.06 88.13 384 86.82 88.02 88.63 382 87.47 87.45 88.11 380 88.72 88.61 88.57 1650 95.12 95.21 95.25 1640 95.13 95.23 95.25 1630 95.14 95.23 95.26 1620 95.15 95.24 95.26 1610 95.14 95.25 95.28 1600 95.15 95.25 95.27 1590 95.15 95.24 95.27 1580 95.14 95.23 95.26 1570 95.14 95.23 95.26 1560 95.12 95.21 95.25 1550 95.12 95.21 95.24 1540 95.11 95.19 95.23 1530 95.10 95.19 95.22 1520 95.10 95.17 95.21 1510 95.07 95.15 95.19 1500 95.06 95.15 95.18 1490 95.03 95.13 95.16 1480 95.03 95.10 95.14 1470 94.99 95.09 95.13 1460 94.98 95.06 95.11 1450 94.96 95.05 95.09 1440 94.95 95.04 95.07 1430 94.92 95.02 95.05 1420 94.90 94.99 95.03 1410 94.89 94.96 95.01 1400 94.85 94.94 94.99 1390 94.84 94.93 94.96 1380 94.82 94.89 94.94 1370 94.78 94.88 94.91 1360 94.77 94.84 94.90 1350 94.75 94.83 94.88 1340 94.72 94.79 94.84 1330 94.69 94.77 94.82 1320 94.65 94.75 94.78 1310 94.63 94.70 94.76 1300 94.60 94.69 94.73 1290 94.56 94.65 94.69 1280 94.53 94.61 94.66 1270 94.51 94.59 94.63 1260 94.47 94.55 94.59 1250 94.43 94.51 94.55 1240 94.39 94.48 94.52 1230 94.35 94.44 94.48 1220 94.31 94.38 94.43 1210 94.27 94.34 94.38 1200 94.22 94.29 94.33 1190 94.15 94.23 94.29 1180 94.10 94.18 94.22 1170 94.04 94.12 94.17 1160 93.97 94.04 94.10 1150 93.91 93.97 94.03 1140 93.83 93.92 93.96 1130 93.76 93.83 93.87 1120 93.68 93.72 93.79 1110 93.58 93.64 93.70 1100 93.49 93.56 93.60 1090 93.37 93.43 93.49 1080 93.25 93.31 93.37 1070 93.13 93.19 93.24 1060 92.99 93.04 93.11 1050 92.83 92.90 92.95 1040 92.68 92.72 92.78 1030 92.49 92.54 92.61 1020 92.29 92.34 92.40 1010 92.06 92.13 92.17 1000 91.82 91.87 91.92 990 91.54 91.60 91.65 980 91.24 91.28 91.34 970 90.91 90.93 91.00 960 90.53 90.56 90.63 950 90.10 90.14 90.19