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Proceedings Article

Overview of the Advanced Camera for Surveys on-orbit performance

[+] Author Affiliations
Holland C. Ford, Marco Sirianni, Andre R. Martel, Gerhardt R. Meurer, William J. McCann, Narcisco Benitez, John Blakeslee, Paul D. Feldman, David A. Golimowski, Caryl Gronwall, Hien D. Tran, Zlatan I. Tsvetanov

Johns Hopkins Univ. (USA)

Mark Clampin, George F. Hartig, Robert A. Brown, John E. Krist, Marc Postman, William B. Sparks, Richard L. White

Space Telescope Science Institute (USA)

Garth D. Illingworth

Univ. of California/Santa Cruz/Lick Observatory (USA)

Pamela C. Sullivan, Douglas Campbell, Edward S. Cheng, Randy A. Kimble

NASA Goddard Space Flight Ctr. (USA)

Frank Bartko

Bartko Science and Technology (USA)

Rychard Bouwens, Dan Magee

Univ. of California/Santa Cruz (USA)

Tom Broadhurst

Racah Institute of Physics/Hebrew Univ. (Israel)

Christopher J. Burrows

Consultant (USA)

Marijn Franx

Leiden Univ. (Netherlands)

Michael P. Lesser

Univ. of Arizona (USA)

George Miley

Leiden Univ. (USA)

Marc D. Rafal

National Radio Astronomy Observatory (USA)

Piero Rosati

European Southern Observatory (Germany)

Paul Volmer

Ball Aerospace & Technologies Corp. (USA)

Robert A. Woodruff

Boeing-SVS Inc. (USA)

Proc. SPIE 4854, Future EUV/UV and Visible Space Astrophysics Missions and Instrumentation, 81 (February 26, 2003); doi:10.1117/12.460040
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From Conference Volume 4854

  • Future EUV/UV and Visible Space Astrophysics Missions and Instrumentation
  • J. Chris Blades; Oswald H. W. Siegmund
  • Waikoloa, Hawai'i, United States | August 22, 2002

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" and 0.14", and 0.050" and 0.10". 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" 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 wavelengths of 594 nm, 802 nm, and 978 nm.

© (2003) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Holland C. Ford ; Mark Clampin ; George F. Hartig ; Garth D. Illingworth ; Marco Sirianni, et al.
"Overview of the Advanced Camera for Surveys on-orbit performance", Proc. SPIE 4854, Future EUV/UV and Visible Space Astrophysics Missions and Instrumentation, 81 (February 26, 2003); doi:10.1117/12.460040; http://dx.doi.org/10.1117/12.460040


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