The table below summarizes the level of accuracy of instrumental calibrations for the Ver.2 data. Note that all the quoted values are preliminary. Further information (notes, related links etc.) can be found by clicking on each calibration item.
Instrument
|
Calibration Item
|
Present Uncertainties (July 2007)
|
Requirement
|
Goal
|
XRT/XIS | On-axis effective area |
2%
|
5%
|
5%
|
Vignetting |
10%
|
5%
|
2%
|
|
On-axis EEF |
20%
|
5%
|
1%
|
|
Off-axis EEF |
20%
|
20%
|
2%
|
|
Energy scale |
0.2% @6 keV, 5 eV @ <1keV/10~30 eV @ 6 keV
|
0.1%
|
0.1%
|
|
Energy resolution |
5%
|
1%
|
1%
|
|
Contamination thickness |
1018 cm-2
|
N/A
|
N/A
|
|
OBF integrity |
unbroken
|
broken/unbroken
|
broken/unbroken
|
|
HXD | Absolute effective area |
20%
|
20%
|
5%
|
Relative effective area |
15%
|
10%
|
5%
|
|
Angular response |
5%
|
10%
|
5%
|
|
Background modeling (PIN) |
5~10%
|
10%
|
5%
|
|
Background modeling (GSO) |
3%
|
10%
|
3%
|
|
Energy scale |
1% (PIN)
|
**%
|
**%
|
|
Absolute timing |
360 mu s
|
300 mu s
|
100 mu s
|
|
Relative timing |
1.9x10-9
|
10-8
|
10-10
|
|
HXD-WAM | GRB absolute timing |
2 ms
|
1 ms
|
1 ms
|
Absolute effective area |
10~40%, depending on the incident angle
|
20%
|
20%
|