Space Telescope Science Institute
2010 WFPC2 Data Handbook
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WFPC2 Data Handbook > Chapter 1: WFPC2 Instrument Overview > 1.2 WFPC2 Quick Reference

1.2 WFPC2 Quick Reference
Table 1.3: Main WFPC2 Parameters
One 34" x 34" chip (PC1).
0.1 arcsec/pixel for wide field chips: WF2, WF3, and WF4.
0.046 arcsec/ pixel for the planetary camera (PC1).
4 x 800 x 800 pixels.
15 μm.
Spectral Response
1,150 Å - 11,000 Å.
Thick front side illuminated silicon sensor, multi-pinned phase (MPP) operation to eliminate quantum efficiency hysteresis, lumogen phosphor coating for UV sensitivity. Made by Loral Aerospace.
~5 e for gain 7 (for details, see Table 4.2 of the WFPC2 Instrument Handbook).
0.002 e/sec/pix [WF2] to 0.006 e/sec/pix [PC1].
7  e/DN, saturates at about 27,000 e.
14 e/DN saturates at about 53,000 e .
Operating Temperature
-88 °C since Apr. 24, 1994. (Prior to that, -76 °C.)
Mean Wavelength
Peak Transmission (%)
~20 - 50
Segments of the UV and CH4 quads are labeled here by their usual physical designations (A, B, C, and D). The quad polarizer is represented for both parallel and perpendicular polarization to its polarization direction, which is different in each quadrant. Additional information is available at the WFPC2 Instrument Handbook,
Chapter 3.

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