NASA NTRS · 20110007123
Timing Analysis with INTEGRAL: Comparing Different Reconstruction Algorithms
Abstract
INTEGRAL is one of the few instruments capable of detecting X-rays above 20keV. It is therefore in principle well suited for studying X-ray variability in this regime. Because INTEGRAL uses coded mask instruments for imaging, the reconstruction of light curves of X-ray sources is highly non-trivial. We present results from the comparison of two commonly employed algorithms, which primarily measure flux from mask deconvolution (ii-lc-extract) and from calculating the pixel illuminated fraction (ii-light). Both methods agree well for timescales above about 10 s, the highest time resolution for which image reconstruction is possible. For higher time resolution, ii-light produces meaningful results, although the overall variance of the lightcurves is not preserved.
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Grinberg, V., Kreykenboehm, I., Fuerst, F., Wilms, J., Pottschmidt, K., Bel, M. Cadolle, Rodriquez, J., Marcu, D. M., Suchy, S., Markowitz, A., Nowak, M. A.. 2010-04-14. Timing Analysis with INTEGRAL: Comparing Different Reconstruction Algorithms. https://ntrs.nasa.gov/citations/20110007123
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