Lightcurves, Colour-Colour Ratio and CuSum plots for HD 179949 Chandra Observations - Acharya et al. (2022)

Plots made for the paper "X-ray Activity on SPI Candidate HD 179949" Anshuman Acharya et al. (2022). This includes:
1. All Light curves for the 7 passbands considered (4 physically motivated + 3 default Chandra passbands) + Broad band (0.5 - 7.0 keV) for the 5 datasets. The filename format is: "dataset ObsID"_"passband name"_lightcurve.pdf.
2. Colour-colour ratios for the passbands (9 combinations) for the 5 datasets. The filename format is: "dataset ObsID"+ColourRatio_"soft passband name"+"hard passband name".pdf.
3. Cumulative Sum of residuals plot for Model 1 (referred to as model 2m in the paper: chosen model for 6121, not chosen for 5427 and 6119) and Model 2 (referred to as model 2v in the paper: chosen model for 5427, 6119, 6121 and 6122). Note that Model 1 plots for ObsIDs 6120 and 6122 are not made as \(\Delta\)Cstat > 2 \(\sigma\) for them. The filename format is: Model1/Model2_"dataset ObsID"_residuals_for_CuSum.pdf.
4. p-value calculated for the Cumulative Sums for all the above cases. The filename format is: Model1/Model2_"dataset ObsID"_p-value_for_CuSum.pdf.

Dataset ObsIDs are: 5427, 6119, 6120, 6121 and 6122.
Passbands used:
    Physically motivated: Oxy (0.5-0.7 keV), Fe (0.7-0.9 keV), Ne (0.9-1.2 keV), Mg (1.2-3.0 keV).
    Default Chandra passbands: ultrasoft (0.2-0.5 keV), soft (0.5-1.2 keV), medium + hard (1.2-8.0 keV), broad (0.5-7.0 keV).