# 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 2024-10-11 (799 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 89.26 90.12 88.73 998 88.99 89.71 88.86 996 88.58 89.84 89.73 994 88.71 88.63 89.41 992 89.81 88.79 89.87 990 89.31 89.23 90.52 988 89.90 88.70 89.37 986 88.40 88.61 89.46 984 89.02 89.61 89.23 982 88.66 88.94 88.49 980 88.28 89.45 88.67 978 89.03 88.69 88.46 976 89.05 88.30 89.25 974 87.86 88.61 89.91 972 88.15 88.88 88.68 970 89.04 88.59 89.04 968 89.23 87.97 89.29 966 88.27 88.03 88.23 964 88.29 88.82 88.63 962 88.48 88.11 88.09 960 88.41 87.38 88.36 958 87.90 88.53 88.97 956 87.84 89.26 88.27 954 87.40 87.99 88.62 952 87.63 88.07 88.02 950 88.34 88.13 87.40 948 88.11 87.36 88.15 946 87.30 87.84 87.13 944 87.87 88.11 87.85 942 87.56 87.62 87.33 940 87.39 87.27 88.03 938 86.88 87.20 87.61 936 87.18 87.49 86.57 934 86.71 86.92 87.07 932 87.11 86.97 87.00 930 87.34 86.92 87.20 928 87.08 87.25 87.15 926 86.75 86.76 86.87 924 86.68 86.85 86.57 922 86.24 86.12 86.28 920 86.15 86.57 86.95 918 85.90 86.45 85.93 916 86.43 86.62 86.06 914 85.98 85.97 85.89 912 85.27 86.29 86.06 910 85.34 86.10 85.89 908 85.61 85.50 85.52 906 85.44 85.37 85.61 904 85.16 85.87 85.46 902 85.22 85.52 85.13 900 84.62 85.25 85.04 898 84.57 84.96 85.06 896 85.01 85.08 84.94 894 84.27 84.86 84.47 892 84.47 84.47 84.19 890 84.37 84.64 84.27 888 83.87 84.72 84.08 886 83.78 84.50 84.08 884 83.41 84.33 84.20 882 83.88 83.84 83.67 880 83.38 83.58 83.78 878 83.51 83.66 83.21 876 83.52 83.30 83.38 874 82.95 83.26 83.04 872 83.23 82.82 82.87 870 82.72 83.07 82.70 868 83.00 82.78 82.63 866 82.69 82.70 82.19 864 82.34 82.91 82.28 862 82.20 82.42 82.16 860 82.54 82.20 82.14 858 82.13 82.17 81.71 856 81.99 82.16 81.84 854 81.78 81.96 81.57 852 81.58 82.00 81.94 850 81.58 81.91 81.47 848 81.71 81.85 81.51 846 81.74 81.75 81.48 844 81.43 81.61 81.31 842 81.19 81.69 81.17 840 81.00 81.39 81.27 838 81.06 81.35 80.87 836 81.30 81.33 81.08 834 81.08 81.24 80.95 832 81.30 81.16 80.98 830 81.31 81.33 80.90 828 80.97 81.06 81.16 826 81.02 81.26 81.06 824 81.31 81.27 81.29 822 81.21 81.02 81.46 820 80.93 80.86 81.07 818 81.05 80.92 81.59 816 81.08 81.37 80.93 814 81.17 81.10 81.24 812 80.98 81.19 81.49 810 81.22 80.95 81.01 808 81.42 81.23 81.39 806 81.24 81.29 81.48 804 81.25 81.51 81.20 802 81.57 81.89 81.42 800 81.72 81.79 81.69 798 81.44 81.51 81.63 796 81.77 81.91 82.07 794 81.74 81.92 81.64 792 81.61 81.78 81.61 790 81.76 81.88 81.79 788 81.94 81.84 81.86 786 81.90 82.27 81.80 784 82.14 82.25 81.99 782 82.10 82.31 81.98 780 82.18 82.53 82.16 778 81.89 82.59 82.26 776 82.28 82.47 82.50 774 82.72 82.74 82.39 772 82.42 82.80 82.72 770 82.77 82.91 82.65 768 82.47 82.92 82.73 766 82.44 83.08 82.63 764 82.78 83.28 83.11 762 82.75 83.38 83.04 760 83.05 83.32 82.99 758 83.06 83.36 83.06 756 83.13 83.14 83.12 754 83.41 83.07 83.52 752 83.62 83.52 83.24 750 83.41 83.53 83.29 748 83.64 83.42 83.30 746 83.53 83.53 83.61 744 83.71 83.59 83.53 742 83.59 83.69 83.63 740 83.69 83.72 83.37 738 83.50 83.63 83.54 736 84.06 83.95 83.70 734 83.80 83.72 83.90 732 83.55 84.07 83.65 730 83.86 83.97 83.76 728 83.85 84.16 83.92 726 83.98 84.02 83.93 724 83.92 84.16 83.96 722 84.38 84.20 84.06 720 84.20 84.19 83.95 718 84.13 84.25 84.27 716 84.19 83.99 84.02 714 84.35 84.25 84.19 712 84.32 84.29 84.06 710 84.34 84.28 84.28 708 84.19 84.31 84.39 706 84.56 84.63 84.35 704 84.40 84.59 84.59 702 84.40 84.34 84.32 700 84.40 84.82 84.46 698 84.39 85.03 84.34 696 84.50 84.68 84.65 694 84.60 84.78 84.80 692 84.68 84.86 84.62 690 84.78 84.84 84.95 688 84.79 84.93 84.53 686 84.79 85.07 84.63 684 84.92 84.94 84.67 682 84.92 85.02 84.73 680 85.02 85.02 84.70 678 85.20 85.10 84.74 676 84.98 85.06 84.86 674 84.98 84.98 84.91 672 85.19 85.00 84.65 670 85.06 85.02 84.99 668 85.00 85.00 84.93 666 84.96 85.02 84.86 664 85.21 85.16 84.83 662 84.92 85.30 84.88 660 85.00 85.23 85.14 658 85.11 85.12 85.01 656 85.42 85.31 84.98 654 85.50 85.11 85.05 652 85.28 85.17 85.09 650 85.25 85.43 85.27 648 85.32 85.34 85.20 646 85.29 85.32 85.29 644 85.34 85.41 85.23 642 85.48 85.41 85.38 640 85.46 85.48 85.31 638 85.32 85.45 85.28 636 85.43 85.54 85.02 634 85.43 85.65 85.33 632 85.48 85.56 85.48 630 85.41 85.55 85.47 628 85.35 85.60 85.38 626 85.38 85.53 85.22 624 85.20 85.54 85.32 622 85.51 85.56 85.30 620 85.39 85.64 85.45 618 85.58 85.70 85.28 616 85.44 85.61 85.39 614 85.70 85.57 85.09 612 85.60 85.50 85.47 610 85.55 85.53 85.47 608 85.59 85.69 85.53 606 85.60 85.71 85.30 604 85.46 85.68 85.83 602 85.65 85.65 85.92 600 85.53 85.55 85.54 598 85.60 85.64 85.22 596 85.89 85.74 85.43 594 85.51 85.55 85.40 592 85.63 85.80 85.65 590 85.77 85.67 85.74 588 85.77 85.59 85.55 586 85.76 85.70 85.50 584 85.83 86.02 85.57 582 85.76 85.75 85.66 580 85.55 85.66 85.65 578 85.63 85.70 85.85 576 85.43 85.56 85.72 574 85.75 85.77 85.61 572 85.89 85.80 85.59 570 85.88 85.85 85.62 568 85.61 85.97 85.68 566 85.77 85.76 85.63 564 85.81 85.88 85.73 562 85.75 85.96 85.64 560 85.80 85.78 85.71 558 85.76 86.08 85.54 556 85.72 85.72 85.68 554 85.80 85.86 85.61 552 85.83 85.88 85.46 550 85.95 85.68 85.54 548 85.78 85.75 85.66 546 85.74 85.62 85.34 544 85.65 85.89 85.68 542 85.70 86.01 85.72 540 85.69 85.56 85.70 538 86.02 85.68 85.69 536 85.98 85.77 85.60 534 85.76 85.87 85.81 532 85.88 85.93 85.65 530 85.91 85.74 85.63 528 85.77 85.67 85.72 526 85.70 85.81 85.91 524 85.83 85.64 85.58 522 85.85 85.81 85.69 520 85.77 85.62 85.53 518 85.79 85.90 85.85 516 85.68 85.79 85.53 514 85.58 85.81 85.59 512 85.88 85.63 85.63 510 85.90 85.80 85.67 508 85.84 85.77 85.72 506 85.90 85.78 85.60 504 85.78 85.77 85.43 502 85.56 85.65 85.63 500 85.61 85.60 85.66 498 85.67 85.60 85.53 496 85.88 85.72 85.78 494 85.89 85.79 85.71 492 85.73 85.90 85.41 490 85.62 85.58 85.45 488 85.64 85.69 85.56 486 85.37 85.60 85.68 484 86.03 85.42 85.67 482 85.49 85.68 85.54 480 85.52 85.57 85.45 478 85.63 85.65 85.55 476 85.79 85.67 85.47 474 85.60 85.59 85.49 472 85.59 85.53 85.63 470 85.68 85.71 85.46 468 85.52 85.69 85.63 466 85.77 85.72 85.55 464 85.33 85.28 85.50 462 85.65 85.62 85.46 460 85.53 85.39 85.69 458 85.68 85.11 85.47 456 85.61 85.07 85.67 454 85.12 85.57 85.38 452 85.86 85.48 85.33 450 85.76 85.75 85.43 448 85.13 85.57 85.64 446 85.45 85.39 85.21 444 85.61 85.22 85.02 442 85.75 85.35 85.39 440 85.17 85.12 85.60 438 85.28 85.33 85.48 436 85.43 85.25 85.27 434 85.58 84.89 85.69 432 85.20 85.21 85.27 430 85.28 84.99 85.27 428 85.18 85.05 84.98 426 85.36 85.25 85.06 424 85.20 85.15 85.20 422 85.12 85.32 85.13 420 84.97 85.21 84.69 418 85.32 85.03 84.68 416 85.25 85.16 85.32 414 85.18 85.19 85.22 412 85.05 84.93 85.04 410 84.84 84.89 85.27 408 84.81 85.21 84.61 406 84.77 84.64 85.79 404 85.01 84.79 85.37 402 84.43 84.45 84.59 400 85.12 84.74 85.20 398 84.82 84.44 84.88 396 84.00 84.88 85.44 394 84.89 84.82 85.45 392 85.29 84.73 85.38 390 84.68 84.50 84.86 388 83.95 85.43 84.85 386 85.79 84.90 84.73 384 85.15 83.58 84.65 382 84.08 83.76 84.12 380 85.11 84.14 84.94 1650 93.59 93.68 93.36 1640 93.61 93.68 93.38 1630 93.60 93.70 93.39 1620 93.61 93.69 93.38 1610 93.62 93.70 93.38 1600 93.60 93.69 93.37 1590 93.60 93.70 93.37 1580 93.59 93.67 93.36 1570 93.58 93.68 93.36 1560 93.58 93.67 93.35 1550 93.57 93.65 93.34 1540 93.54 93.64 93.31 1530 93.53 93.63 93.31 1520 93.52 93.60 93.28 1510 93.49 93.58 93.27 1500 93.48 93.58 93.25 1490 93.46 93.55 93.25 1480 93.45 93.53 93.22 1470 93.43 93.52 93.21 1460 93.40 93.50 93.17 1450 93.38 93.47 93.17 1440 93.35 93.46 93.13 1430 93.34 93.44 93.12 1420 93.31 93.42 93.10 1410 93.28 93.39 93.08 1400 93.26 93.38 93.05 1390 93.23 93.34 93.02 1380 93.21 93.32 92.99 1370 93.18 93.28 92.97 1360 93.16 93.27 92.94 1350 93.13 93.23 92.92 1340 93.11 93.21 92.89 1330 93.07 93.18 92.87 1320 93.04 93.13 92.83 1310 93.01 93.12 92.80 1300 92.98 93.08 92.77 1290 92.96 93.05 92.74 1280 92.92 93.01 92.70 1270 92.87 92.97 92.67 1260 92.84 92.93 92.64 1250 92.80 92.89 92.58 1240 92.76 92.85 92.55 1230 92.71 92.80 92.51 1220 92.66 92.76 92.45 1210 92.61 92.71 92.40 1200 92.55 92.65 92.35 1190 92.49 92.59 92.29 1180 92.43 92.53 92.22 1170 92.37 92.46 92.17 1160 92.30 92.39 92.09 1150 92.23 92.33 92.03 1140 92.14 92.24 91.95 1130 92.07 92.14 91.85 1120 91.97 92.07 91.77 1110 91.87 91.97 91.68 1100 91.76 91.86 91.57 1090 91.66 91.74 91.47 1080 91.53 91.63 91.34 1070 91.37 91.49 91.21 1060 91.25 91.34 91.06 1050 91.08 91.18 90.90 1040 90.90 91.00 90.73 1030 90.72 90.83 90.54 1020 90.50 90.61 90.34 1010 90.27 90.38 90.11 1000 90.01 90.12 89.86 990 89.73 89.84 89.58 980 89.43 89.53 89.24 970 89.08 89.17 88.92 960 88.69 88.79 88.53 950 88.25 88.34 88.09