1.5.1 Performance Synopsis

Table 1.1 lists many characteristics relevant to the ACIS/AXAF performance. Those not discussed there will be addressed in the following sections.

 

$$\gt 80\%$$ @ 4 keV

$$\gt 30\%$$ 0.8-8 keV

$$\gt 5\%$$ 0.35-0.8 keV

Detector projected area 16.9 by 16.9 arc-min imaging 8.3 by 50.6 arc-min spectroscopic

$$\mathrel{\hbox{\rlap{\hbox{\lower4pt\hbox{$\sim$}}}\hbox{$<$}}}2$$ System noise

$$3.65 \rm eV/e^-$$ Electron production energy

Fano factor 0.12

Max readout-rate per channel 100,000 pixels/sec

Number of parallel signal channels 4

Pulse-height encoding 12 bits/pixel

$$100,000\times4\times16\times 6$$ Max internal data-rate

Output data-rate 24 kb per sec

CCD frame repetition times 3.3 sec (nominal full array) 0.18 sec (fastest-single CCD)

Minimum line readout time 100 ms (full line)

$$100.0 \mu \rm s$$ Minimum pixel readout time

Nominal exposure time 0.2 to 10.0 s

$$4\times10^{-15}\rm ergs\,cm^{-2}\,s^{-1}\ in \ 10^4\, s$$ Point-source sensitivity

$$-120^\circ$$ Detector operating temperature