GRB19990831 
12:59:22.258 
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     18.1200000   7522.9162864
     20.6200000   7707.2912799
     23.1200000   7122.9163022
     25.6200000   5618.7497150
     28.1200000   4955.2080786
     30.6200000   4232.2914492
     33.1200000   3888.5414686
     35.6200000   3346.8748282
     38.1200000   3142.1873372
     40.6200000   2652.0831985
     43.1200000   2363.0207108
     45.6200000   2096.3540581
     48.1200000   2015.1040630
     50.6200000   1598.4374190
     53.1200000   1396.6145124
     55.6200000   1105.7291103
     60.6200000    840.8853728
     65.6200000    646.2239256
     70.6200000    470.9635180
     75.6200000    367.3176893
     80.6200000    287.6301938
     85.6200000    233.4635302
     90.6200000    195.8333238
     95.6200000    118.8802022
    100.6200000    116.8402720
    108.1200000     88.1076348
    115.6200000     60.4166638
    123.1200000     51.5624976
    130.6200000     42.5347203
    138.1200000     35.9374985
    145.6200000     25.0868046
    153.1200000     19.8784713
    160.6200000     15.6249992
    170.6200000     12.4999994
    180.6200000      9.1145828
    190.6200000     11.3932287
    200.6200000      6.9444441
    215.6200000      6.4670136
    230.6200000      5.1215275
    245.6200000      5.7291664
    260.6200000     17.9687493
    265.6200000      2.1354165
    290.6200000      5.4687497
    310.6200000      4.9153644
    330.6200000      3.8085935
    350.6200000      5.4036456
    370.6200000      2.4739582
    390.6200000      5.4166665
    415.6200000      5.5468748
    440.6200000      3.9843748
    465.6200000      2.3697915
    490.6200000      3.9062499
    515.6200000      3.2031249
    540.6200000      3.1770832
    565.6200000      1.1197916
    590.6200000      1.6406249
    615.6200000      1.0416666
    640.6200000      2.5390624
    670.6200000      2.5824652
    700.6200000      1.9748263
    730.6200000      1.3020833