The IBIS / ISGRI Source Location Accuracy
A. Gros (1,2), A. Goldwurm (1,3), S. Soldi (1,2), D. Gotz (1,2), I., Caballero (1,2), F. Mattana (3), J. A. Zurita Heras (3), ((1) SAp/IRFU/CEA, Saclay, France, (2) AIM/CEA Saclay, France, (3) APC Paris, France)

TL;DR
This paper evaluates the source location accuracy of the INTEGRAL IBIS/ISGRI telescope using ten years of data and improved analysis techniques, providing updated error estimates and future prospects.
Contribution
It introduces new data analysis procedures and fitting methods that improve the accuracy estimation of source localization for the IBIS/ISGRI instrument.
Findings
Typical 90% confidence error at S/N=10 is 1.5 arcmin.
Updated parameters for source location error based on new analysis.
Future plans include refining the PSF fitting and bias correction techniques.
Abstract
We present here results on the source location accuracy of the INTEGRAL IBIS/ISGRI coded mask telescope, based on ten years of INTEGRAL data and on recent developments in the data analysis procedures. Data were selected and processed with the new Off-line Scientific Analysis pipeline (OSA10.0) that benefits from the most accurate background corrections, the most performing coding noise cleaning and sky reconstruction algorithms available. We obtained updated parameters for the evaluation of the point source location error from the source signal to noise ratio. These results are compared to previous estimates and to theoretical expectations. Also thanks to a new fitting procedure the typical error at 90% confidence level for a source at a signal to noise of 10 is now estimated to be 1.5 arcmin. Prospects for future analysis on the Point Spread Function fitting procedure and on the…
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Taxonomy
TopicsAdaptive optics and wavefront sensing · Advanced optical system design · Calibration and Measurement Techniques
