Table 1.
X-ray wide-field instruments (table built with inputs from Krimm et al. 2013).
| Mission | Period of | Energy range | Source localisation | 20 min sensitivity |
|---|---|---|---|---|
| instrument | operation | (keV) | accuracy | (3σ; mCrab) (a) |
| CGRO/BATSE | 1991–2000 | 20–1800 | >0.2° | 637 |
| RXTE/ASM | 1995–2012 | 2–12 | 5 arcmin | 127 |
| Swift/BAT | 2004–… | 14–195 | 2.5 arcmin (1σ) | 136 |
| Fermi/GBM | 2008–… | 8–500 | ≈0.5° (b) | 1274 |
| MAXI/GSC | 2009–… | 2–20 | 1.5° | 76 |
Notes. (a)Assuming the sensitivity is proportional to 
, where t is the observing time.
(b)The Fermi/GBM localisation accuracy of ≈0.5° corresponds to the one achieved for the monitoring of a catalogue of bright sources with the Earth occultation technique (Wilson-Hodge et al. 2012). The localisation accuracy is larger for the GRB detection: 3.7° for 90% of the bursts extending up to ≈14° (Connaughton et al. 2015).
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