The Goodness of Simultaneous Fits in ISIS
arXiv:1605.02088 · doi:10.14311/APP.2016.56.0041
Abstract
In a previous work, we introduced a tool for analyzing multiple datasets simultaneously, which has been implemented into ISIS. This tool was used to fit many spectra of X-ray binaries. However, the large number of degrees of freedom and individual datasets raise an issue about a good measure for a simultaneous fit quality. We present three ways to check the goodness of these fits: we investigate the goodness of each fit in all datasets, we define a combined goodness exploiting the logical structure of a simultaneous fit, and we stack the fit residuals of all datasets to detect weak features. These tools are applied to all RXTE-spectra from GRO 1008-57, revealing calibration features that are not detected significantly in any single spectrum. Stacking the residuals from the best-fit model for the Vela X-1 and XTE J1859+083 data evidences fluorescent emission lines that would have gone undetected otherwise.
arXiv comment6 pages, 6 figures
References in corpus (7)
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Cited by in corpus (8)
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- Spectro-timing study of GX 339-4 in a hard intermediate state
- Studying the accretion geometry of EXO 2030+375 at luminosities close to the propeller regime
- Evidence for different accretion regimes in GRO J1008-57
- A Study of the 20 Day Superorbital Modulation in the High-Mass X-ray Binary IGR J16493-4348
- The giant outburst of 4U 0115+634 in 2011 with Suzaku and RXTE
- A possible phase dependent absorption feature in the transient X-ray pulsar SAX J2103.5+4545
- On the nature of the X-ray pulsar XTE J1859+083 and its broadband properties