Observing the WHIM with Athena

T. Brand; J. Wilms; T. Dauser; P. Peille; B. Cobo; M. Ceballos; R. A. den Hartog; J. S. Kaastra; P. O'Brien; X. Barcons; L. Piro; J.-W. A. den Herder; D. Barret

doi:10.1117/12.2234442

18 July 2016 Observing the WHIM with Athena

T. Brand, J. Wilms, T. Dauser, P. Peille, B. Cobo, M. Ceballos, R. A. den Hartog, J. S. Kaastra, P. O'Brien, X. Barcons, L. Piro, J.-W. A. den Herder, D. Barret

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Proceedings Volume 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray; 99055F (2016) https://doi.org/10.1117/12.2234442
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

We present simulations of the detection probability for absorption lines from ions in the warm and hot ionized medium (WHIM) with Athena in the spectra of Gamma-ray burst afterglows. The simulations are based on Swift XRT lightcurves of these afterglows and are performed using the end-to-end simulation framework SIXTE. We simulate both the case of single and multiple absorption lines, as well as results for line searches in absorption structures from a more complex medium. We show that the Athena X-IFU can detect WHIM lines with strong Ovii lines (equivalent widths larger than 0.14 eV) in spectra containing 3 x 10⁶ counts.

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T. Brand, J. Wilms, T. Dauser, P. Peille, B. Cobo, M. Ceballos, R. A. den Hartog, J. S. Kaastra, P. O'Brien, X. Barcons, L. Piro, J.-W. A. den Herder, and D. Barret "Observing the WHIM with Athena", Proc. SPIE 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray, 99055F (18 July 2016); https://doi.org/10.1117/12.2234442

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