JODRELL BANK CRAB PULSAR TIMING RESULTS - MONTHLY EPHEMERIS Date MJD t_MIT t_JPL t_acc nu sigma_nu nudot sigma_nudot DM tau_408 sec sec usec Hz 10-15sec-2 pccm-3 musec 15 FEB 82 45015 0.028682 0.021592 100 30.0592241133 3 -381008.75 0.92 56.834 100 15 MAR 82 45043 0.025779 0.018609 100 30.0583024378 2 -380959.78 0.55 56.837 100 15 APR 82 45074 0.033204 0.026111 50 30.0572820848 9 -380937.40 1.57 56.830 100 15 MAY 82 45104 0.014496 0.007626 50 30.0562947468 5 -380908.68 0.96 56.818 100 15 JUN 82 45135 0.027443 0.020887 600 30.0552745757 19 -380834.54 5.26 56.836 100 15 JUL 82 45165 0.015563 0.009312 60 30.0542874354 2 -380820.20 0.57 56.823 100 15 AUG 82 45196 0.030831 0.024812 50 30.0532674840 4 -380800.04 1.26 56.820 100 15 SEP 82 45227 0.005138 0.032439 200 30.0522475829 2 -380788.69 0.89 56.822 100 15 OCT 82 45257 0.013639 0.007598 200 30.0512606980 1 -380754.71 0.29 56.821 100 15 NOV 82 45288 0.014998 0.008680 50 30.0502409438 5 -380712.11 0.59 56.825 100 15 DEC 82 45318 0.026893 0.020227 20 30.0492541745 4 -380683.27 0.66 56.800 100 15 JAN 83 45349 0.029096 0.022071 50 30.0482345947 2 -380657.31 0.65 56.813 100 15 FEB 83 45380 0.023077 0.015796 100 30.0472150945 4 -380610.26 1.65 56.807 100 15 MAR 83 45408 0.023342 0.015975 60 30.0462943458 5 -380577.96 0.73 56.814 100 15 APR 83 45439 0.033161 0.025873 50 30.0452750347 4 -380551.86 1.37 56.818 100 15 MAY 83 45469 0.015156 0.008093 60 30.0442886606 2 -380522.14 0.65 56.812 100 15 JUN 83 45500 0.018478 0.011735 100 30.0432695205 2 -380484.56 0.45 56.817 100 15 JUL 83 45530 0.001393 0.028248 50 30.0422833491 1 -380459.86 0.32 56.823 100 15 AUG 83 45561 0.013893 0.025698 50 30.0412643626 1 -380429.25 0.39 (56.823) 100 15 SEP 83 45592 0.000738 0.027913 50 30.0402454624 2 -380397.52 0.40 56.812 100 15 OCT 83 45622 0.019433 0.013213 70 30.0392595241 2 -380361.91 0.52 56.821 100 15 NOV 83 45653 0.006468 0.033262 70 30.0382407889 2 -380324.03 0.27 56.830 100 15 DEC 83 45683 0.021719 0.014858 100 30.0372550137 5 -380310.46 1.10 56.823 100 15 JAN 84 45714 0.031340 0.024108 50 30.0362364410 2 -380260.60 0.43 56.813 100 15 FEB 84 45745 0.006795 0.032593 70 30.0352179804 1 -380231.81 0.34 56.819 100 15 MAR 84 45774 0.018425 0.010692 100 30.0342653163 2 -380196.81 0.46 56.827 100 15 APR 84 45805 0.001555 0.027365 70 30.0332470097 2 -380176.42 0.63 (56.827) 100 15 MAY 84 45835 0.028105 0.020850 70 30.0322616516 2 -380134.80 0.41 (56.827) 100 15 JUN 84 45866 0.022997 0.016052 100 30.0312435533 2 -380096.83 0.63 56.829 100 15 JUL 84 45896 0.007324 0.000422 100 30.0302583586 2 -380075.98 0.61 56.829 100 15 AUG 84 45927 0.015489 0.008911 100 30.0292404199 3 -380047.61 1.04 56.826 720 15 SEP 84 45958 0.002836 0.029886 100 30.0282225241 12 -379994.01 1.99 56.834 1100 15 OCT 84 45988 0.023219 0.016791 200 30.0272376263 8 -379985.96 1.95 56.845 1600 15 NOV 84 46019 0.011806 0.005088 400 30.0262199366 6 -379949.31 0.67 56.853 1500 15 DEC 84 46049 0.020226 0.013133 200 30.0252351486 8 -379919.13 2.27 56.834 130 15 JAN 85 46080 0.016794 0.009406 70 30.0242176120 1 -379884.34 0.47 56.827 200 15 FEB 85 46111 0.021412 0.013753 50 30.0232001654 2 -379856.71 0.62 56.827 200 15 MAR 85 46139 0.011123 0.003288 40 30.0222812604 2 -379819.74 0.46 56.830 200 15 APR 85 46170 0.018725 0.010972 30 30.0212639792 1 -379793.40 0.27 56.827 100 15 MAY 85 46200 0.003745 0.029538 30 30.0202795791 2 -379772.73 0.70 56.825 100 15 JUN 85 46231 0.014525 0.007340 60 30.0192624576 2 -379731.45 0.58 56.829 100 15 JUL 85 46261 0.023125 0.016264 70 30.0182782469 3 -379701.04 0.74 56.830 100 15 AUG 85 46292 0.005172 0.031870 100 30.0172612933 5 -379661.39 1.58 56.846 100 15 SEP 85 46323 0.009010 0.002472 100 30.0162444816 97 -379614.74 11.21 (56.846) 100 15 OCT 85 46353 0.027119 0.020464 100 30.0152605112 3 -379602.74 0.74 56.819 100 15 NOV 85 46384 0.020715 0.013764 40 30.0142438399 1 -379561.18 0.25 56.825 100 15 DEC 85 46414 0.020101 0.012764 75 30.0132600572 3 -379529.09 0.85 (56.825) 100 15 JAN 86 46445 0.006803 0.032394 60 30.0122435595 1 -379495.02 0.39 56.800 100 15 FEB 86 46476 0.008738 0.000728 50 30.0112271413 1 -379471.99 0.34 56.800 100 15 MAR 86 46504 0.031838 0.023731 70 30.0103091692 2 -379442.96 0.47 56.804 100 15 APR 86 46535 0.028741 0.020717 50 30.0092929149 1 -379412.23 0.32 56.802 100 15 MAY 86 46565 0.004327 0.029865 150 30.0083095195 4 -379363.72 1.26 56.805 100 15 JUN 86 46596 0.021669 0.014223 100 30.0072934397 5 -379334.98 2.16 (56.805) 100 15 JUL 86 46626 0.009945 0.002830 50 30.0063102270 2 -379317.91 0.50 (56.805) 100 15 AUG 86 46657 0.018160 0.011296 60 30.0052942862 2 -379287.21 0.64 (56.805) 100 (note 8) 15 SEP 86 46688 0.021567 0.014785 700 30.0042784593 3 -379280.46 0.45 56.843 100 (note 8) 15 OCT 86 46718 0.029655 0.022756 120 30.0032954585 1 -379228.80 0.26 56.832 100 15 NOV 86 46749 0.018796 0.011603 80 30.0022797859 6 -379181.06 1.40 56.842 100 15 DEC 86 46779 0.003997 0.029731 50 30.0012969626 2 -379158.70 0.53 56.845 100 15 JAN 87 46810 0.010355 0.002354 60 30.0002814735 2 -379130.04 0.39 56.845 100 15 FEB 87 46841 0.009196 0.000907 60 29.9992660671 2 -379097.49 0.64 56.844 100 15 MAR 87 46869 0.003713 0.028659 100 29.9983490021 6 -379058.70 2.38 56.851 100 15 APR 87 46900 0.025318 0.017012 80 29.9973337716 3 -379031.90 0.55 (56.851) 100 15 MAY 87 46930 0.028256 0.020192 70 29.9963513479 2 -379014.26 0.61 56.851 100 15 JUN 87 46961 0.027152 0.019436 130 29.9953362620 5 -378972.42 1.38 56.858 100 15 JUL 87 46991 0.007015 0.032978 150 29.9943540266 3 -378932.50 1.12 (56.858) 1500 15 AUG 87 47022 0.019054 0.011936 100 29.9933391231 3 -378892.87 0.78 (56.858) 750 15 SEP 87 47053 0.002800 0.029110 120 29.9923243313 3 -378879.27 0.95 56.861 750 15 OCT 87 47083 0.004590 0.030782 50 29.9913423139 2 -378848.25 0.45 56.853 1000 15 NOV 87 47114 0.024528 0.017070 75 29.9903276661 4 -378808.96 1.15 56.859 1350 15 DEC 87 47144 0.031676 0.023815 100 29.9893458047 5 -378792.52 1.37 56.852 1500 15 JAN 88 47175 0.026876 0.018603 75 29.9883313042 2 -378744.58 0.71 56.856 1000 15 FEB 88 47206 0.024222 0.015654 100 29.9873169279 4 -378708.57 1.11 56.859 850 15 MAR 88 47235 0.006479 0.031156 25 29.9863680534 3 -378689.56 0.82 (56.859) 1000 15 APR 88 47266 0.009717 0.001135 100 29.9853538033 2 -378674.11 0.57 (56.859) 500