Документ взят из кэша поисковой машины. Адрес оригинального документа : http://xmm.vilspa.esa.es/sas/7.1.0/doc/lcplot/node10.html
Дата изменения: Mon Jul 9 02:03:57 2007
Дата индексирования: Sat Dec 22 08:43:04 2007
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XMM-Newton Science Analysis System


lcplot (lcplot-1.19.1) [xmmsas_20070708_1801-7.1.0]

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Comments

• lcplot only produces plots of light curves measured by EPIC or OM. We note that no RGS Source Time Series FITS file is specified in [1].
• Error rates are rebinned following a quadratic scheme (Central limit theorem).
• Time intervals all have the same length, the first one is $[$TSTART , TSTART + Binsize*TIMEDEL$]$ where TIMEDEL is the bin width read from the file [1].
• We note in [1] that the keyword TIMEDEL is specified in MJD. We have assumed it to be given in seconds.
• Time on the X-axis is given as T-TSTART in seconds.
• The mean, variance, Chi Square, etc are provided with six significant digits.
• A Chi Square statistic close to the bin number and a small Kolmogorov-Smirnov statistic with probabilities higher than 0.01 indicate that the source is not variable.
• The output devices are those of the PGPLOT library. The device list is governed by the drivers available to PGPLOT.