We recommend filtering out data where the elevation angle is less than 10 degrees. Here, zero is defined as pointing at the horizon, negative is looking at Earth, and positive is looking at the source. Were there any Earth occultations? Plot the column ELV.At these times, all PCU are turned off, so NUM_PCU_ON goes to zero. Periods where the number of PCUs on is different should be reduced separately and combined later - see the recipe Combining 3-PCU, 4-PCU and 5-PCU Spectra for details.Īnother thing you can determine from the number of PCU on is when the SAA passages occur. How many PCUs were on? Plot the columns:.For the y-axes, it depends what in particular we want to see: To plot it, type "fplot offset=yes" followed by the name of the filter file. Examine the filter file and create a GTI file: The filter file tells you the status of the satellite and its instruments during your observation and can be used to identify periods of good data.If you don't have a filter file, then generate one following the recipe Creating XTE Filter Files.For more information, type "fhelp fmerge".
![how to add new pca column back to how to add new pca column back to](https://i.stack.imgur.com/XdSog.png)
Sure the input files are in increasing time order and adding lastkey=TSTOP to the command line. If the data you want to examine span more than one ObsId, then it's a good idea to merge the corresponding filter files.We recommend naming the XDF output file something like filter.xdf. Use XDF to find the filter file: select the Standard Products subsystem, and at the bottom of the AppId window, select Filter_File.We recommend naming the XDF output file something like std2.xdf. Use XDF to find your Standard-2 datafiles: Instructions can be found in the Getting Started Guide.To avoid confusing generalities, this example assumes that your observation is of a flaring AGN. Here we sketch all the steps involved in producing the files needed by xspec, namely, source and background spectra and a response.
![how to add new pca column back to how to add new pca column back to](https://rpkgs.datanovia.com/factoextra/tools/README-pca-variable-contributions-1.png)
This recipe, therefore, uses Standard-2 data throughout, but includes a section on other configurations like Good Xenon and Binned Burst Catcher.
![how to add new pca column back to how to add new pca column back to](https://scikit-learn.org/stable/_images/sphx_glr_plot_incremental_pca_001.png)
Given these obvious advantages, the only good reason to use a configuration other than Standard-2 for spectral analysis is to obtain temporal resolution better than the 16 seconds of Standard-2.
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HOW TO ADD NEW PCA COLUMN BACK TO GENERATOR
Moreover, the background generator pcabackest creates synthetic datafiles that look just like Standard-2, so that reducing them in parallel with the real thing is straightforward.