Overview of the advanced camera for surveys on-orbit performance

Holland Ford, Mark Clampin, George Hartig, Garth Illingworth, Marco Sirianni, Andre Martel, Gerhardt Meurer, Wm Jon McCann, Pam Sullivan, Frank Bartko, Narciso Benitez, John Blakeslee, Rychard Bouwens, Tom Broadhurst, Robert Brown, Chris Burrows, Doug Campbell, Ed Cheng, Paul Feldman, Marijn FranxDavid Golimowski, Caryl Gronwall, Randy Kimble, John Krist, Michael Lesser, Dan Magee, George Miley, Marc Postman, Marc Rafal, Piero Rosati, William Sparks, Hien Tran, Zlatan Tsvetanov, Paul Volmer, Rick White, Robert Woodruff

Research output: Contribution to journalArticle

65 Citations (Scopus)

Abstract

We present an overview of the ACS on-orbit performance based on the calibration observations taken during the first three months of ACS operations. The ACS meets or exceeds all of its important performance specifications. The WFC and HRC FWHM and 50% encircled energy diameters at 555 nm are 0.088 inches and 0.14 inches, and 0.050 inches and 0.10 inches. The average rms WFC and HRC read noises are 5.0 e- and 4.7 e-. The WFC and HRC average dark currents are ∼ 7.5 and ∼ 9.1 e-/pixel/hour at their operating temperatures of - 76°C and - 80°C. The SBC + HST throughput is 0.0476 and 0.0292 through the F125LP and F150LP filters. The lower than expected SBC operating temperature of 15 to 27°C gives a dark current of 0.038 e-/pix/hour. The SBC just misses its image specification with an observed 50% encircled energy diameter of 0.24 inches at 121.6 nm. The ACS HRC coronagraph provides a 6 to 16 direct reduction of a stellar PSF, and a ∼1000 to ∼9000 PSF-subtracted reduction, depending on the size of the coronagraphic spot and the wavelength. The ACS grism has a position dependent dispersion with an average value of 3.95 nm/pixel. The average resolution λ/Δλ for stellar sources is 65, 87, and 78 at wavelength of 594 nm, 802 nm, and 978 nm.

Original languageEnglish
Pages (from-to)81-94
Number of pages14
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4854
DOIs
Publication statusPublished - 2002
Externally publishedYes

Fingerprint

Dark currents
Orbits
Pixels
Camera
Orbit
Cameras
cameras
orbits
Specifications
Wavelength
Dark Current
Full width at half maximum
dark current
operating temperature
specifications
Pixel
pixels
Throughput
Calibration
Specification

Keywords

  • ACS
  • CCDs
  • Coronagraph
  • Grism
  • HRC
  • HST
  • SBC
  • WFC

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Ford, H., Clampin, M., Hartig, G., Illingworth, G., Sirianni, M., Martel, A., ... Woodruff, R. (2002). Overview of the advanced camera for surveys on-orbit performance. Proceedings of SPIE - The International Society for Optical Engineering, 4854, 81-94. https://doi.org/10.1117/12.460040

Overview of the advanced camera for surveys on-orbit performance. / Ford, Holland; Clampin, Mark; Hartig, George; Illingworth, Garth; Sirianni, Marco; Martel, Andre; Meurer, Gerhardt; McCann, Wm Jon; Sullivan, Pam; Bartko, Frank; Benitez, Narciso; Blakeslee, John; Bouwens, Rychard; Broadhurst, Tom; Brown, Robert; Burrows, Chris; Campbell, Doug; Cheng, Ed; Feldman, Paul; Franx, Marijn; Golimowski, David; Gronwall, Caryl; Kimble, Randy; Krist, John; Lesser, Michael; Magee, Dan; Miley, George; Postman, Marc; Rafal, Marc; Rosati, Piero; Sparks, William; Tran, Hien; Tsvetanov, Zlatan; Volmer, Paul; White, Rick; Woodruff, Robert.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 4854, 2002, p. 81-94.

Research output: Contribution to journalArticle

Ford, H, Clampin, M, Hartig, G, Illingworth, G, Sirianni, M, Martel, A, Meurer, G, McCann, WJ, Sullivan, P, Bartko, F, Benitez, N, Blakeslee, J, Bouwens, R, Broadhurst, T, Brown, R, Burrows, C, Campbell, D, Cheng, E, Feldman, P, Franx, M, Golimowski, D, Gronwall, C, Kimble, R, Krist, J, Lesser, M, Magee, D, Miley, G, Postman, M, Rafal, M, Rosati, P, Sparks, W, Tran, H, Tsvetanov, Z, Volmer, P, White, R & Woodruff, R 2002, 'Overview of the advanced camera for surveys on-orbit performance', Proceedings of SPIE - The International Society for Optical Engineering, vol. 4854, pp. 81-94. https://doi.org/10.1117/12.460040
Ford, Holland ; Clampin, Mark ; Hartig, George ; Illingworth, Garth ; Sirianni, Marco ; Martel, Andre ; Meurer, Gerhardt ; McCann, Wm Jon ; Sullivan, Pam ; Bartko, Frank ; Benitez, Narciso ; Blakeslee, John ; Bouwens, Rychard ; Broadhurst, Tom ; Brown, Robert ; Burrows, Chris ; Campbell, Doug ; Cheng, Ed ; Feldman, Paul ; Franx, Marijn ; Golimowski, David ; Gronwall, Caryl ; Kimble, Randy ; Krist, John ; Lesser, Michael ; Magee, Dan ; Miley, George ; Postman, Marc ; Rafal, Marc ; Rosati, Piero ; Sparks, William ; Tran, Hien ; Tsvetanov, Zlatan ; Volmer, Paul ; White, Rick ; Woodruff, Robert. / Overview of the advanced camera for surveys on-orbit performance. In: Proceedings of SPIE - The International Society for Optical Engineering. 2002 ; Vol. 4854. pp. 81-94.
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AU - Martel, Andre

AU - Meurer, Gerhardt

AU - McCann, Wm Jon

AU - Sullivan, Pam

AU - Bartko, Frank

AU - Benitez, Narciso

AU - Blakeslee, John

AU - Bouwens, Rychard

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AU - Brown, Robert

AU - Burrows, Chris

AU - Campbell, Doug

AU - Cheng, Ed

AU - Feldman, Paul

AU - Franx, Marijn

AU - Golimowski, David

AU - Gronwall, Caryl

AU - Kimble, Randy

AU - Krist, John

AU - Lesser, Michael

AU - Magee, Dan

AU - Miley, George

AU - Postman, Marc

AU - Rafal, Marc

AU - Rosati, Piero

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AU - White, Rick

AU - Woodruff, Robert

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N2 - We present an overview of the ACS on-orbit performance based on the calibration observations taken during the first three months of ACS operations. The ACS meets or exceeds all of its important performance specifications. The WFC and HRC FWHM and 50% encircled energy diameters at 555 nm are 0.088 inches and 0.14 inches, and 0.050 inches and 0.10 inches. The average rms WFC and HRC read noises are 5.0 e- and 4.7 e-. The WFC and HRC average dark currents are ∼ 7.5 and ∼ 9.1 e-/pixel/hour at their operating temperatures of - 76°C and - 80°C. The SBC + HST throughput is 0.0476 and 0.0292 through the F125LP and F150LP filters. The lower than expected SBC operating temperature of 15 to 27°C gives a dark current of 0.038 e-/pix/hour. The SBC just misses its image specification with an observed 50% encircled energy diameter of 0.24 inches at 121.6 nm. The ACS HRC coronagraph provides a 6 to 16 direct reduction of a stellar PSF, and a ∼1000 to ∼9000 PSF-subtracted reduction, depending on the size of the coronagraphic spot and the wavelength. The ACS grism has a position dependent dispersion with an average value of 3.95 nm/pixel. The average resolution λ/Δλ for stellar sources is 65, 87, and 78 at wavelength of 594 nm, 802 nm, and 978 nm.

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