|
WFC |
HRC |
SBC |
---|---|---|---|
Field-of-View |
202"× 202" |
29"× 26" |
34.6"× 30.8" |
Plate Scale |
~0.05"/pixel |
~0.028 × 0.025"/pixel |
~0.034 × 0.030"/pixel |
Pixel Size |
15 × 15 µm |
21 × 21 µm |
25 × 25 µm |
Image Format |
2 × 2048 × 4096 pixels |
1024 × 1024 pixel |
1024 × 1024 pixel |
Spectral Response |
~3500 Å to 11,000 Å |
~1700 Å to 11,000 Å |
~1150 Å to 1700 Å |
Detector |
SITe CCDs |
SITe CCD |
CsI MCP with MAMA readout |
Detector Efficiency |
~77% at 4000 Å ~83% at 6000 Å ~67% at 8000 Å |
~33% at 2500 Å ~69% at 6000 Å ~53% at 8000 Å |
~19.2% @ 1216 Å |
Peak Efficiency |
48% at ~7000 Å |
29% at ~6500 Å |
7.5% at ~1250 Å |
Read Noise |
5.0 e- |
4.7 e- |
0 counts |
Dark Current |
0.0032 e-/s/pixel |
0.0036 e-/s/pixel |
1.241 × 10-5e-/s/pixel |
Full Well |
84,700 e- |
155,000 e- |
1Detector count rate linearity limit: 200,000 counts/second Pixel count-rate linearity limit: ~22 counts/second/pixel |
Gain |
1,2,4 and 8 e-/DN (Max 65,535 DN) |
1,2,4 and 8 e-/DN (Max 65,535 DN) |
n/a |
1Loss of linearity occurs at count rates larger than these values. For more information, please see Section 4.5.6. |
Attribute |
WFC |
HRC |
SBC |
Limiting factor |
---|---|---|---|---|
Distortion Solution Accuracy |
0.1 pixel |
0.1 pixel |
0.25 pixel |
Calibration & stability of geometric distortion1 |
Absolute Astrometry |
0.5" to 1" |
1" |
1" |
Guide Star Catalog uncertainties2 |
Absolute Photometry |
3% |
2% |
5% |
Absolute calibration, standards |
Relative Photometry within an Image |
1% |
1% |
2% |
Flat-field characterization or characterization of geometric distortion. |
Repeated Photometry of Same Star |
0.3% |
0.3% |
1% |
Stability of flat field |
Transformation to Standard Magnitude Systems |
0.02 mag SDSS 0.025 mag WFPC2 0.03 mag BVRI |
0.02 mag SDSS 0.025 mag WFPC2 0.03 mag BVRI |
n/a |
DQE curve determination Color terms |
Polarimetry |
1% |
1% |
n/a |
|
Wavelength Calibration |
20 Å grism |
12 Å grism |
1 pixel prisms |
Accuracy of dispersion solution |
Spectrophotometry |
6% (Grism) |
10% (Grism) |
20% (Prism) |
|
1Anderson & King, ISR 04-15 (http://www.stsci.edu/hst/acs/documents/isrs/isr0415.pdf )2Koekemoe, et. al., ISR 05-06 ( http://www.stsci.edu/hst/acs/documents/isrs/isr0506.pdf ) |
Filter type |
Filter description |
Camera |
---|---|---|
Broadband |
Sloan Digital Sky Survey (SDSS): F475W, F625W, F775W, F850LP |
WFC/HRC |
|
B, V, Medium V, Wide V, I: F435W, F555W, F550M, F606W, F814W |
WFC/HRC |
|
Near-UV: F220W, F250W, F330W |
HRC |
|
No Filter: CLEAR |
WFC/HRC |
Narrowband |
H ![]() |
WFC/HRC |
|
NeV (3440 Å): F344N |
HRC |
|
Methane (8920 Å): F892N |
HRC/[WFC 1] |
Ramp filters |
2% bandpass (3700-10,700 Å): FR388N, FR505N, FR656N |
WFC/HRC |
|
2% bandpass (3700-10,700 Å): FR423N, FR462N, FR716N, FR782N, FR853N, FR931N, FR1016N, FR551N, FR601N |
WFC |
|
9% bandpass (3700-10,700 Å): FR459M, FR914M |
WFC/HRC |
|
9% bandpass (3700-10,700 Å): FR647M |
WFC |
Spectroscopic |
Grism: G800L |
WFC/HRC |
|
Prism: PR200L |
HRC |
Polarizers |
Visible (0º, 60º,120º): POL0V, POL60V, POL120V |
HRC/[WFC1] |
|
Near-UV (0º, 60º, 120º): POL0UV, POL60UV, POL120UV |
HRC/[WFC 1] |
Medium Band |
Lyman-Alpha: F122M |
SBC |
Long Pass |
MgF2, CaF2, BaF2, Quartz, Fused Silica: F115LP, F125LP, F140LP, F150LP, F165LP |
SBC |
Prisms |
LiF, CaF2: PR110L, PR130L |
SBC |
1Limited field of view (72" x 72") for these filters using WFC |
Space Telescope Science Institute http://www.stsci.edu Voice: (410) 338-1082 help@stsci.edu |