Fourth time’s a XARM

Arguably, no mission changed X-ray astronomy in as short a time as did Hitomi. The planned X-ray Astronomy Recovery Mission, XARM, will carry its legacy forward.

Access options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.

Fig. 1: The Hitomi spectrum of the Perseus cluster around the strongest emission transitions of ionized iron (Fe xxv).
Fig. 2: The parameter space opened up by the microcalorimeters on XARM and Hitomi.


  1. 1.

    Cen, R. & Ostriker, J. P. Astrophys. J. 514, 1–6 (1999).

    ADS  Article  Google Scholar 

  2. 2.

    Takahashi, T. et al. Preprint at (2014).

  3. 3.

    Kilbourne, C. et al. J. Astron. Telesc. Instrum. Syst. 4, 011214 (2018).

    ADS  Google Scholar 

  4. 4.

    Hitomi Experience Report: Investigation of Anomalies Affecting the X-ray Astronomy Satellite ‘Hitomi’ (ASTRO-H) (JAXA, 2016);

  5. 5.

    Hitomi Collaboration. Nature 535, 117–121 (2016).

    ADS  Article  Google Scholar 

  6. 6.

    Aharonian, F. et al. Astrophys. J. Lett. 837, L15 (2017).

    ADS  Article  Google Scholar 

  7. 7.

    Hitomi Collaboration. Nature 551, 478–480 (2017).

    ADS  Google Scholar 

  8. 8.

    Tashiro, M. & Kelley, R. in Proc. Conf. ‘The X-ray Universe’ 2017 (eds Ness, J.-U. & Migliari, S.) (ESA, 2017);

  9. 9.

    Nandra, K. et al. Preprint at (2013).

  10. 10.

    Gandhi, P., Degenaar, N., Done, C. & Watson, M. G. Astron. Geophys. 58, 6.24–6.28 (2017).

    Article  Google Scholar 

Download references

Author information



Corresponding author

Correspondence to Poshak Gandhi.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Gandhi, P. Fourth time’s a XARM. Nat Astron 2, 434–436 (2018).

Download citation


Sign up for the Nature Briefing newsletter for a daily update on COVID-19 science.
Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing