*** QSO 0957+561A,B photometry by Jan-Erik Ovaldsen *** The table below contains the brightnesses in the R-band of the twin images of the double quasar QSO 0957+561A,B derived using our aperture photometry program. Light contamination between the quasar components as well as from the lensing galaxy is corrected for. The observations were made with the 1.2 meter reflector telescope at F. L. Whipple Observatory atop Mt. Hopkins, Arizona, USA, during a five year period from June 1992 to April 1997. The table lists Julian dates and the magnitudes and errors of the A and B quasar images. The errors are the formal 1-sigma measurement errors, including Poisson noise from the source, background and lens galaxy, as well as formal uncertainties from the field star calibration. For further details about the photometry scheme, the data set, and the results, see my Master's thesis (notably Chapters 5 and 6) or the paper "New aperture photometry of QSO 0957+561; application to time delay and microlensing" (Astronomy & Astrophysics, vol. 402, pp. 891-904). More information: http://www.himmelkalenderen.com/jeo-facts/ Julian Day A mag A err B mag B err 2448776.47 16.713 0.022 16.611 0.021 2448777.36 16.702 0.026 16.606 0.024 2448779.37 16.683 0.020 16.608 0.020 2448780.36 16.689 0.021 16.603 0.020 2448781.36 16.694 0.022 16.612 0.020 2448782.36 16.686 0.025 16.614 0.023 2448783.36 16.692 0.028 16.627 0.027 2448784.38 16.693 0.024 16.598 0.023 2448785.36 16.680 0.022 16.605 0.021 2448786.37 16.686 0.023 16.619 0.022 2448787.37 16.711 0.027 16.613 0.025 2448788.36 16.687 0.028 16.597 0.026 2448789.37 16.700 0.024 16.619 0.023 2448790.37 16.685 0.025 16.606 0.023 2448798.36 16.689 0.023 16.621 0.023 2448799.37 16.691 0.019 16.618 0.018 2448800.37 16.698 0.023 16.614 0.022 2448807.41 16.732 0.078 16.520 0.065 2448808.39 16.693 0.021 16.590 0.020 2448809.41 16.688 0.027 16.578 0.025 2448810.38 16.715 0.027 16.584 0.024 2448813.37 16.779 0.039 16.664 0.036 2448814.37 16.742 0.036 16.620 0.032 2448901.73 16.691 0.028 16.542 0.024 2448902.71 16.666 0.014 16.521 0.013 2448903.70 16.674 0.013 16.515 0.012 2448904.73 16.686 0.023 16.503 0.019 2448905.72 16.669 0.019 16.522 0.017 2448906.73 16.704 0.034 16.506 0.029 2448907.72 16.647 0.028 16.504 0.025 2448908.72 16.650 0.034 16.514 0.030 2448909.70 16.661 0.026 16.508 0.023 2448910.72 16.679 0.028 16.561 0.025 2448911.70 16.666 0.028 16.548 0.025 2448913.70 16.564 0.066 16.507 0.061 2448954.74 16.636 0.015 16.601 0.014 2448957.73 16.646 0.013 16.595 0.013 2448958.73 16.635 0.014 16.605 0.014 2448962.74 16.630 0.013 16.612 0.013 2448963.72 16.634 0.012 16.637 0.013 2448965.71 16.644 0.025 16.605 0.024 2448966.73 16.656 0.030 16.634 0.030 2448967.72 16.628 0.026 16.603 0.025 2448977.65 16.630 0.028 16.625 0.028 2448978.60 16.639 0.050 16.594 0.048 2448979.73 16.629 0.011 16.611 0.011 2448980.61 16.624 0.013 16.617 0.013 2448991.55 16.561 0.019 16.573 0.019 2449007.66 16.613 0.012 16.608 0.013 2449008.57 16.620 0.011 16.592 0.011 2449009.62 16.606 0.011 16.587 0.011 2449010.62 16.615 0.010 16.593 0.010 2449011.63 16.618 0.011 16.583 0.011 2449012.65 16.616 0.014 16.572 0.014 2449016.60 16.611 0.010 16.563 0.010 2449018.54 16.603 0.013 16.538 0.013 2449020.47 16.608 0.014 16.563 0.014 2449035.61 16.611 0.012 16.596 0.012 2449044.65 16.622 0.015 16.621 0.015 2449045.47 16.617 0.011 16.612 0.011 2449046.40 16.619 0.028 16.604 0.028 2449049.55 16.624 0.016 16.640 0.016 2449050.51 16.637 0.022 16.636 0.022 2449058.52 16.607 0.014 16.637 0.015 2449059.50 16.622 0.011 16.648 0.011 2449060.49 16.616 0.011 16.650 0.011 2449062.50 16.620 0.011 16.641 0.011 2449064.42 16.627 0.019 16.653 0.021 2449065.49 16.575 0.064 16.621 0.068 2449066.44 16.620 0.011 16.637 0.011 2449067.45 16.617 0.011 16.652 0.011 2449068.52 16.620 0.012 16.658 0.012 2449070.43 16.613 0.013 16.651 0.014 2449071.42 16.618 0.011 16.654 0.012 2449072.35 16.614 0.012 16.656 0.012 2449073.34 16.599 0.011 16.656 0.012 2449075.34 16.600 0.013 16.638 0.013 2449077.40 16.622 0.013 16.655 0.014 2449078.33 16.610 0.018 16.643 0.019 2449091.43 16.620 0.027 16.640 0.028 2449092.36 16.624 0.012 16.651 0.012 2449093.34 16.611 0.012 16.656 0.012 2449094.39 16.624 0.030 16.662 0.031 2449095.39 16.620 0.011 16.655 0.012 2449096.37 16.609 0.011 16.644 0.012 2449097.34 16.624 0.012 16.641 0.012 2449098.34 16.637 0.012 16.652 0.013 2449104.50 16.583 0.022 16.638 0.023 2449105.49 16.585 0.029 16.647 0.031 2449106.48 16.599 0.016 16.605 0.017 2449107.43 16.624 0.020 16.649 0.021 2449113.41 16.619 0.027 16.602 0.027 2449117.52 16.611 0.021 16.565 0.021 2449120.51 16.585 0.017 16.570 0.017 2449122.38 16.597 0.012 16.590 0.013 2449125.34 16.607 0.022 16.595 0.022 2449126.37 16.613 0.010 16.585 0.010 2449131.37 16.616 0.016 16.568 0.015 2449133.40 16.622 0.015 16.598 0.015 2449142.48 16.622 0.049 16.639 0.050 2449144.40 16.605 0.030 16.553 0.029 2449145.42 16.625 0.025 16.588 0.024 2449146.40 16.635 0.029 16.568 0.027 2449147.37 16.623 0.013 16.585 0.013 2449148.37 16.613 0.015 16.583 0.014 2449149.36 16.624 0.020 16.582 0.020 2449150.38 16.601 0.013 16.579 0.013 2449151.38 16.601 0.013 16.577 0.013 2449152.37 16.610 0.019 16.589 0.019 2449153.41 16.599 0.017 16.589 0.017 2449158.37 16.588 0.019 16.565 0.018 2449159.38 16.595 0.014 16.568 0.014 2449161.38 16.595 0.014 16.574 0.014 2449164.38 16.590 0.018 16.588 0.018 2449167.37 16.610 0.034 16.605 0.034 2449169.37 16.578 0.033 16.595 0.034 2449263.71 16.570 0.026 16.600 0.026 2449268.71 16.559 0.017 16.578 0.018 2449270.70 16.545 0.034 16.595 0.036 2449272.73 16.528 0.020 16.587 0.021 2449273.72 16.555 0.012 16.588 0.013 2449274.73 16.563 0.027 16.589 0.027 2449275.69 16.543 0.062 16.529 0.060 2449276.70 16.545 0.013 16.591 0.014 2449279.72 16.564 0.013 16.585 0.014 2449281.73 16.556 0.011 16.584 0.012 2449282.73 16.566 0.036 16.590 0.036 2449295.67 16.550 0.031 16.586 0.032 2449297.74 16.556 0.019 16.594 0.020 2449298.70 16.557 0.032 16.594 0.033 2449299.72 16.552 0.014 16.587 0.014 2449300.72 16.559 0.013 16.595 0.013 2449301.70 16.569 0.013 16.598 0.014 2449307.74 16.547 0.014 16.578 0.015 2449312.75 16.553 0.020 16.598 0.021 2449314.72 16.566 0.015 16.601 0.016 2449315.75 16.570 0.018 16.600 0.019 2449316.67 16.563 0.012 16.594 0.012 2449329.42 16.553 0.037 16.569 0.037 2449331.47 16.543 0.016 16.569 0.017 2449332.47 16.567 0.060 16.647 0.065 2449335.71 16.545 0.010 16.590 0.011 2449340.57 16.511 0.031 16.599 0.033 2449344.72 16.542 0.012 16.588 0.012 2449356.66 16.556 0.012 16.590 0.013 2449357.64 16.562 0.012 16.595 0.013 2449358.67 16.555 0.025 16.586 0.026 2449364.65 16.541 0.016 16.563 0.016 2449366.63 16.558 0.016 16.578 0.016 2449369.55 16.565 0.014 16.573 0.014 2449370.66 16.564 0.012 16.577 0.012 2449373.57 16.567 0.012 16.568 0.012 2449374.60 16.571 0.014 16.562 0.014 2449383.56 16.594 0.016 16.573 0.016 2449385.58 16.577 0.016 16.558 0.016 2449387.46 16.562 0.013 16.547 0.013 2449388.50 16.561 0.013 16.536 0.013 2449389.51 16.562 0.012 16.540 0.012 2449393.52 16.563 0.012 16.542 0.012 2449395.51 16.558 0.021 16.528 0.020 2449398.60 16.542 0.012 16.519 0.012 2449399.53 16.553 0.011 16.518 0.011 2449403.53 16.556 0.015 16.524 0.015 2449406.52 16.535 0.020 16.505 0.020 2449407.53 16.541 0.027 16.507 0.026 2449414.49 16.551 0.021 16.500 0.020 2449415.51 16.531 0.025 16.515 0.027 2449416.50 16.530 0.010 16.511 0.011 2449419.49 16.535 0.012 16.520 0.012 2449421.41 16.533 0.012 16.516 0.012 2449422.53 16.536 0.012 16.517 0.012 2449425.42 16.542 0.013 16.507 0.013 2449428.34 16.539 0.013 16.512 0.013 2449429.34 16.541 0.016 16.530 0.016 2449430.35 16.546 0.012 16.515 0.012 2449434.38 16.561 0.020 16.524 0.020 2449437.42 16.554 0.025 16.536 0.025 2449445.44 16.558 0.011 16.527 0.011 2449446.41 16.555 0.011 16.525 0.011 2449448.38 16.565 0.012 16.523 0.012 2449449.41 16.562 0.011 16.530 0.011 2449451.38 16.551 0.012 16.532 0.012 2449452.37 16.546 0.027 16.526 0.026 2449455.36 16.559 0.012 16.555 0.012 2449456.33 16.565 0.021 16.539 0.021 2449457.48 16.552 0.017 16.529 0.017 2449459.34 16.556 0.013 16.541 0.013 2449461.51 16.560 0.018 16.524 0.018 2449462.56 16.579 0.025 16.539 0.024 2449475.45 16.565 0.011 16.534 0.011 2449476.34 16.552 0.012 16.524 0.012 2449477.46 16.583 0.010 16.524 0.010 2449480.41 16.569 0.011 16.529 0.011 2449481.35 16.588 0.013 16.527 0.013 2449482.35 16.569 0.010 16.523 0.010 2449483.34 16.577 0.012 16.530 0.012 2449484.38 16.591 0.011 16.528 0.010 2449485.49 16.572 0.012 16.510 0.012 2449488.39 16.579 0.011 16.528 0.011 2449489.34 16.573 0.023 16.526 0.023 2449490.36 16.574 0.013 16.524 0.013 2449491.35 16.569 0.045 16.525 0.044 2449492.35 16.574 0.014 16.532 0.013 2449494.39 16.604 0.017 16.533 0.016 2449495.37 16.582 0.017 16.516 0.016 2449496.37 16.582 0.018 16.527 0.018 2449497.38 16.592 0.023 16.532 0.022 2449498.42 16.565 0.035 16.526 0.034 2449500.36 16.600 0.011 16.521 0.011 2449501.45 16.611 0.026 16.532 0.025 2449503.39 16.605 0.012 16.521 0.011 2449504.36 16.602 0.013 16.525 0.012 2449505.39 16.606 0.011 16.524 0.010 2449506.37 16.602 0.012 16.520 0.011 2449507.38 16.603 0.012 16.536 0.012 2449508.36 16.600 0.017 16.526 0.016 2449509.35 16.605 0.022 16.521 0.021 2449510.47 16.606 0.012 16.523 0.012 2449511.39 16.607 0.011 16.533 0.011 2449512.49 16.606 0.015 16.531 0.014 2449514.46 16.593 0.014 16.527 0.013 2449515.38 16.599 0.014 16.541 0.013 2449516.40 16.614 0.013 16.550 0.012 2449517.36 16.606 0.016 16.543 0.016 2449518.36 16.618 0.022 16.517 0.020 2449519.36 16.600 0.024 16.542 0.023 2449521.36 16.588 0.022 16.532 0.021 2449633.73 16.623 0.017 16.472 0.016 2449635.69 16.605 0.013 16.456 0.011 2449636.68 16.614 0.012 16.451 0.011 2449637.71 16.597 0.011 16.465 0.011 2449638.72 16.605 0.012 16.472 0.011 2449651.72 16.597 0.017 16.462 0.015 2449652.72 16.601 0.014 16.476 0.013 2449653.73 16.589 0.014 16.455 0.013 2449654.73 16.589 0.013 16.447 0.012 2449661.72 16.592 0.013 16.467 0.012 2449662.74 16.558 0.026 16.457 0.024 2449663.70 16.601 0.014 16.452 0.013 2449666.74 16.590 0.013 16.468 0.012 2449670.74 16.582 0.013 16.486 0.012 2449671.69 16.574 0.012 16.471 0.011 2449672.66 16.579 0.029 16.471 0.027 2449674.64 16.565 0.025 16.463 0.023 2449677.69 16.563 0.016 16.471 0.015 2449684.72 16.543 0.011 16.474 0.010 2449685.68 16.545 0.010 16.477 0.010 2449687.69 16.549 0.010 16.471 0.010 2449688.75 16.557 0.012 16.480 0.012 2449689.72 16.549 0.012 16.490 0.011 2449693.74 16.514 0.013 16.443 0.012 2449695.67 16.550 0.015 16.467 0.014 2449696.66 16.534 0.013 16.467 0.012 2449699.70 16.552 0.013 16.473 0.013 2449700.72 16.507 0.016 16.420 0.015 2449701.74 16.558 0.011 16.478 0.010 2449702.68 16.549 0.017 16.479 0.016 2449703.70 16.560 0.017 16.477 0.016 2449704.61 16.545 0.022 16.475 0.020 2449705.65 16.560 0.019 16.480 0.018 2449706.63 16.563 0.018 16.475 0.017 2449708.52 16.580 0.018 16.478 0.017 2449714.73 16.579 0.016 16.469 0.014 2449717.77 16.633 0.024 16.499 0.021 2449720.73 16.586 0.013 16.500 0.013 2449725.71 16.610 0.011 16.471 0.010 2449728.66 16.591 0.018 16.464 0.016 2449740.55 16.538 0.028 16.473 0.026 2449744.63 16.595 0.010 16.459 0.009 2449745.61 16.586 0.011 16.469 0.010 2449749.59 16.584 0.010 16.458 0.009 2449750.66 16.596 0.010 16.467 0.009 2449751.68 16.601 0.011 16.467 0.010 2449752.50 16.586 0.011 16.458 0.010 2449753.57 16.597 0.009 16.470 0.009 2449754.52 16.584 0.009 16.454 0.009 2449755.54 16.568 0.005 16.457 0.005 2449756.66 16.567 0.006 16.453 0.005 2449758.46 16.569 0.007 16.451 0.007 2449759.58 16.561 0.010 16.450 0.009 2449765.63 16.581 0.041 16.424 0.036 2449773.52 16.573 0.010 16.446 0.009 2449778.43 16.568 0.012 16.443 0.011 2449780.51 16.574 0.014 16.459 0.013 2449782.37 16.602 0.014 16.478 0.013 2449783.53 16.617 0.027 16.476 0.024 2449788.42 16.598 0.013 16.482 0.012 2449796.47 16.628 0.018 16.473 0.016 2449797.47 16.602 0.016 16.492 0.014 2449798.54 16.609 0.007 16.493 0.007 2449800.40 16.610 0.006 16.489 0.006 2449801.48 16.587 0.009 16.479 0.008 2449804.43 16.608 0.006 16.494 0.006 2449805.47 16.606 0.009 16.486 0.009 2449806.61 16.591 0.034 16.518 0.032 2449808.32 16.622 0.028 16.444 0.024 2449809.53 16.628 0.011 16.476 0.010 2449812.40 16.618 0.011 16.476 0.010 2449813.39 16.613 0.011 16.481 0.010 2449814.36 16.626 0.012 16.476 0.011 2449815.36 16.613 0.012 16.486 0.011 2449816.35 16.611 0.013 16.485 0.012 2449817.32 16.613 0.040 16.472 0.035 2449820.55 16.599 0.024 16.468 0.021 2449822.49 16.611 0.023 16.482 0.021 2449826.37 16.590 0.011 16.460 0.010 2449828.46 16.610 0.011 16.451 0.010 2449830.39 16.604 0.012 16.443 0.011 2449831.42 16.591 0.010 16.442 0.010 2449832.36 16.586 0.011 16.437 0.010 2449834.33 16.603 0.015 16.442 0.013 2449835.35 16.602 0.012 16.439 0.011 2449836.33 16.578 0.013 16.440 0.012 2449837.34 16.588 0.021 16.454 0.019 2449838.34 16.582 0.022 16.450 0.020 2449839.33 16.579 0.016 16.456 0.014 2449844.39 16.580 0.017 16.439 0.015 2449846.44 16.592 0.016 16.450 0.014 2449847.38 16.585 0.015 16.434 0.014 2449848.40 16.588 0.017 16.436 0.015 2449849.34 16.597 0.024 16.464 0.021 2449850.36 16.583 0.026 16.451 0.023 2449851.39 16.585 0.019 16.440 0.017 2449852.38 16.597 0.020 16.439 0.018 2449853.35 16.593 0.018 16.465 0.017 2449856.39 16.594 0.011 16.468 0.010 2449857.41 16.602 0.013 16.464 0.012 2449859.39 16.603 0.011 16.485 0.010 2449860.42 16.599 0.018 16.473 0.016 2449861.36 16.599 0.012 16.474 0.011 2449862.35 16.587 0.016 16.460 0.014 2449863.39 16.601 0.012 16.479 0.011 2449865.42 16.604 0.012 16.477 0.011 2449866.44 16.601 0.014 16.463 0.013 2449867.50 16.597 0.014 16.473 0.013 2449868.39 16.604 0.011 16.468 0.011 2449869.39 16.599 0.011 16.477 0.010 2449870.38 16.595 0.011 16.467 0.011 2449872.37 16.603 0.013 16.485 0.012 2449873.36 16.593 0.015 16.470 0.014 2449874.35 16.586 0.022 16.483 0.021 2449875.36 16.610 0.017 16.471 0.015 2449876.36 16.612 0.019 16.487 0.017 2449877.36 16.608 0.018 16.474 0.017 2449884.41 16.619 0.024 16.499 0.022 2449885.36 16.592 0.014 16.484 0.013 2449888.38 16.599 0.013 16.468 0.012 2449978.97 16.586 0.012 16.557 0.012 2450004.98 16.591 0.015 16.600 0.015 2450019.00 16.573 0.015 16.592 0.016 2450030.99 16.621 0.015 16.661 0.015 2450039.01 16.637 0.010 16.683 0.011 2450047.94 16.642 0.026 16.671 0.027 2450051.48 16.595 0.009 16.645 0.009 2450053.95 16.604 0.010 16.646 0.011 2450054.95 16.592 0.010 16.637 0.011 2450056.03 16.586 0.009 16.640 0.010 2450067.82 16.502 0.033 16.517 0.034 2450069.91 16.532 0.014 16.535 0.014 2450070.87 16.518 0.013 16.543 0.013 2450072.04 16.543 0.012 16.583 0.013 2450077.99 16.505 0.011 16.559 0.012 2450079.80 16.499 0.013 16.512 0.014 2450086.97 16.510 0.021 16.497 0.021 2450089.92 16.518 0.020 16.499 0.020 2450091.46 16.505 0.017 16.496 0.017 2450095.02 16.500 0.014 16.505 0.015 2450098.93 16.514 0.023 16.482 0.023 2450101.77 16.494 0.014 16.474 0.014 2450102.80 16.508 0.012 16.494 0.012 2450103.80 16.512 0.012 16.489 0.012 2450106.82 16.511 0.013 16.496 0.013 2450109.71 16.530 0.011 16.475 0.010 2450112.69 16.544 0.020 16.466 0.018 2450117.90 16.530 0.011 16.494 0.011 2450118.76 16.526 0.011 16.486 0.011 2450119.83 16.522 0.010 16.487 0.010 2450120.92 16.529 0.008 16.497 0.008 2450121.88 16.528 0.007 16.485 0.007 2450122.82 16.532 0.006 16.497 0.006 2450124.82 16.546 0.046 16.504 0.043 2450131.82 16.526 0.012 16.532 0.012 2450132.76 16.531 0.014 16.538 0.014 2450133.82 16.516 0.015 16.540 0.015 2450134.84 16.498 0.054 16.544 0.057 2450135.67 16.505 0.037 16.535 0.038 2450136.79 16.522 0.016 16.547 0.017 2450149.65 16.517 0.014 16.561 0.015 2450163.60 16.527 0.014 16.549 0.014 2450167.65 16.538 0.028 16.557 0.028 2450170.72 16.538 0.012 16.549 0.013 2450172.73 16.533 0.012 16.532 0.013 2450184.63 16.567 0.009 16.527 0.009 2450186.64 16.544 0.009 16.560 0.009 2450195.63 16.555 0.009 16.549 0.009 2450198.65 16.554 0.021 16.576 0.022 2450199.64 16.570 0.022 16.550 0.022 2450200.77 16.571 0.012 16.537 0.012 2450239.68 16.576 0.010 16.564 0.010 2450242.67 16.574 0.011 16.546 0.011 2450244.64 16.547 0.021 16.536 0.021 2450247.68 16.587 0.040 16.525 0.038 2450252.65 16.568 0.019 16.554 0.019 2450255.68 16.559 0.014 16.543 0.014 2450259.68 16.581 0.019 16.533 0.018 2450260.69 16.562 0.017 16.544 0.017 2450372.02 16.588 0.011 16.503 0.011 2450374.02 16.590 0.015 16.512 0.014 2450375.00 16.597 0.010 16.507 0.009 2450379.99 16.584 0.010 16.515 0.009 2450396.02 16.558 0.011 16.517 0.011 2450402.00 16.526 0.046 16.543 0.046 2450408.03 16.555 0.015 16.478 0.015 2450430.89 16.508 0.009 16.478 0.009 2450450.90 16.481 0.013 16.470 0.013 2450457.99 16.471 0.008 16.487 0.008 2450487.80 16.512 0.065 16.525 0.066 2450515.90 16.487 0.010 16.460 0.010 2450522.67 16.511 0.009 16.452 0.008 2450523.68 16.499 0.017 16.445 0.017 2450524.65 16.491 0.019 16.449 0.019 2450546.71 16.534 0.009 16.481 0.009