Overhead Times Table: Overhead times of available instrument modes in seconds for an observation containing only one (n=1) exposure. For more exposures the overheads increase according to the formula, substituting n with the number of exposures. Note, that these times may change throughout the mission.
Instrument Mode1 Obs.start Obs.end Exposure Total Overhead
MOS 1 Full Frame 680 92 570 x n 1342
MOS 1 Large Window 680 92 570 x n 1342
MOS 1 Small Window 680 92 570 x n 1342
MOS 1 Timing 680 92 809 x n 1581
MOS 1 Refresh Frame Store 680 92 610 x n 1382
MOS 2 Full Frame 680 87 605 x n 1372
MOS 2 Large Window 680 87 600 x n 1367
MOS 2 Small Window 680 87 615 x n 1382
MOS 2 Timing 680 87 870 x n 1637
MOS 2 Refresh Frame Store 680 87 610 x n 1377
pn Full Frame 13 72 2874 x n 2959
pn Large Window 13 72 3233 x n 3318
pn Small Window 13 72 1438 x n 1523
pn Timing 13 72 3175 x n 3260
pn Burst 13 72 2615 x n 2700
pn Extended Full Frame 13 72 5169 x n 5254
pn Mosaic 13 72 3826 x n 3911
RGS 1 Spectroscopy 997 17 80 x n 1094
RGS 1 Spectroscopy (HCR) 997 17 57 x n 1071
RGS 1 Small Window 997 17 57 x n 1071
RGS 2 Spectroscopy 1002 17 83 x n 1102
RGS 2 Spectroscopy (HCR) 1002 17 84 x n 1103
RGS 2 Small Window 1002 17 118 x n 1137
OM Full Frame High Resolution 1051 34 8280 x n 9365
OM Full Frame Low Resolution 1051 34 2909 x n 3994
OM Science User Defined 1338 34 307 x n 1679
OM EPIC Image 1338 34 1608 x n 2980
OM EPIC Image Fast 1338 34 1608 x n 2980
OM RGS Image 1338 34 1608 x n 2980
OM RGS Image Fast 1338 34 1608 x n 2980
Note to Table:
1) For a detailed description of the different instrument modes see § 5.2 or the UHB.