Instrument-Specific Reference Information
More detail on instrument performance may be found at the following Instrument Handbook links & in the table below:
- Table 3.1, ACS IHB
- Table 5.1, WFC3 IHB
- Table 1.3, WFPC2 IHB
- Table 7.1, STIS IHB
- Table 2.1 and Table 7.1, NICMOS IHB
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 2.9) |
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 |