Instrument-Specific Reference Information

More detail on instrument performance may be found at the following Instrument Handbook links & in the table below:

 

Instrument Characteristics
Detector Pixel Format (Pixels) Plate Scale (arcsec/pixel) Field of View (arcsec) Full Well Default Drizzled Output Units DQ Flag Definitions
             
ACS/WFC 2 × 2048×4096 (50-pixel gap) ~0.05 202×202 84,700 e– e–/sec ACS DHB Table 3.4
ACS/HRC 1024×1024 ~0.028×0.025 29×26 155,000 e– e–/sec  
ACS/SBC 1024×1024 ~0.034×0.030 34.6×30.8 (Total) detector linearity limit: 200,000 counts/sec; 
Pixel linearity limit: ~22 counts/sec/pixel
e–/sec  
WFC3/UVIS 2 x 2051×4096 (31-pixel gap) 0.04 162×162 63,000–72,000×e– e–/sec WFC3 DHB (Table 2.6)
WFC3/IR 1024×1024 (1014×1014 active) 0.13 136×123 77,900 e– (mean) e–/sec  
WFPC2 
(PC1)
800×800 0.0455 36×36 ~90,000 e– 
Digital Saturation: ~27,000 e– (Gain=7); ~53,000 e– (Gain=14)
DN/sec WFPC2 DHB Table 3.3
WFPC2/WF2,3,4, 800×800 (each chip) 0.0996 80×80 (each chip) ~90,000 e– ; 
Digital Saturation: ~27,000 e– (Gain=7); ~53,000 e– (Gain=14)
DN/sec  
STIS/CCD 1024×1024 0.05078 52×52 144,000 e– (inner); 
120,000 e– (outer);
Saturation: 33,000 e− at GAIN=1; 144,000 e− at GAIN=4
e–/sec STIS DHB Table 2.8
NICMOS/NIC1 256×256 0.043 11×11 26,900 ADU; 
saturation 21,500 ADU (Gain = 5.4 e–/ADU)
DN/sec NICMOS DHB Table 2.3
NICMOS/NIC2 256×256 0.075 19.2×19.2 28,200 ADU; 
saturation 20,500 ADU (Gain = 5.4 e–/ADU)
DN/sec  
NICMOS/NIC3 256×256 0.2 51.2×51.2 32,800 ADU; 
saturation 27,400 ADU (Gain = 5.4 e–/ADU)
DN/sec