The following pages contain information on the performance of Wide Field Camera 3 and its components.

Performance Information

 

Flight Detectors

UVIS 

  • Components: 2x2Kx4K thinned, backside illuminated, UV optimized e2v CCDs
  • Wavelength Range: 200 to 1000 nm
  • Total Field of View: 162 x 162 arcsec (rhomboidal)
  • Pixel format: 2 butted 2051x4096, 31-pixel gap (1.2").
  • Pixel Size: 15x15 microns
  • Plate Scale: 0.04 arcsec/pixel
  • Nominal Operating Temperature: -83C
  • Dark Current: ~9 e-/hr/pix (median) [Revised May 2019. See WFC3 IHB, Table 5.1]
  • Readnoise: 3.1 e-
  • Full Well: 63,000 -- 72,000 e- [See WFC3 IHB, Table 5.1]
  • Gain: 1.52 - 1.56 e-/ADU
  • Instrument Throughput: UVIS filters

IR 

  • Components: 1Kx1K Teledyne HgCdTe FPA, MBE grown, substrate removed
  • Wavelength Range: 800 to 1700 nm
  • Total Field of View: 123 x 136 arcsec (rectangular)
  • Pixel format: 1024x1024 (1014x1014 active)
  • Pixel Size: 18 microns
  • Plate Scale: 0.13 arcsec/pixel
  • Nominal Operating Temperature: 145 K
  • Dark Current: 0.048 e-/sec/pix (median) [See WFC3 IHB, Table 5.1]
  • Readnoise: 21 e- (CDS), 12 e- (16-read linear fit) [See WFC3 IHB, Table 5.1]
  • Full Well: 77,900 e- [See WFC3 IHB, Table 5.1]
  • Gain: 2.5 e-/ADU
  • Instrument Throughput: IR filters

Image Quality

Image quality analysis of the UVIS channel during ground testing show 90-92% of the flux from a 250nm point source falling within a diameter of 0.35 arcsec. This decreases with increasing source wavelength, to 85-86% for a 810nm point source.

UVIS Flight Detector

  • ISR 2005-10: WFC3 UVIS PSF Evaluation in Thermal-Vacuum Test #1
    G. Harting 03 Mar 2005

  • ISR 2004-08: Preliminary WFC3 UVIS PSF Evaluation
    G. Hartig 24 May 2004
LAST UPDATED: 07/31/2020

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