TIMING ANALYSIS WITH INTEGRAL: COMPARING DIFFERENT RECONSTRUCTION ALGORITHMS

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https://ojs.cvut.cz/ojs/index.php/ap/article/view/1312

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https://doi.org/10.14311/1312
 http://hdl.handle.net/11603/29878

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UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
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UMBC Physics Department
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https://orcid.org/0000-0002-4656-6881

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2011-01-01

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journal articles
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Citation of Original Publication

Grinberg, V., I. Kreykenbohm, F. Fürst, J. Wilms, K. Pottschmidt, M. Cadolle Bel, J. Rodriguez, et al. “Timing Analysis with INTEGRAL: Comparing Different Reconstruction Algorithms.” Acta Polytechnica 51, no. 1 (January 1, 2011). https://doi.org/10.14311/1312.

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Abstract

INTEGRAL is one of the few instruments capable of detecting X-rays above 20 keV. 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 a 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.