24 February 2003 Overview of the Advanced Camera for Surveys on-orbit performance
Author Affiliations +
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 Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Holland C. Ford, Mark Clampin, George F. Hartig, Garth D. Illingworth, Marco Sirianni, Andre R. Martel, Gerhardt R. Meurer, William Jon McCann, Pamela C. Sullivan, Frank Bartko, Narcisco Benitez, John Blakeslee, Rychard Bouwens, Tom Broadhurst, Robert A. Brown, Christopher J. Burrows, Douglas Campbell, Edward S. Cheng, Paul D. Feldman, Marijn Franx, David A. Golimowski, Caryl Gronwall, Randy A. Kimble, John E. Krist, Michael P. Lesser, Dan Magee, George Miley, Marc Postman, Marc D. Rafal, Piero Rosati, William Brian Sparks, Hien D. Tran, Zlatan I. Tsvetanov, Paul Volmer, Richard L. White, Robert A. Woodruff, "Overview of the Advanced Camera for Surveys on-orbit performance", Proc. SPIE 4854, Future EUV/UV and Visible Space Astrophysics Missions and Instrumentation, (24 February 2003); doi: 10.1117/12.460040; https://doi.org/10.1117/12.460040


NGST NIRCam scientific program and design concept
Proceedings of SPIE (March 05 2003)
Analysis of the comparative responses of SMEI and LASCO
Proceedings of SPIE (September 20 2007)
MICADO: the E-ELT adaptive optics imaging camera
Proceedings of SPIE (July 15 2010)
A silicon and KRS 5 grism suite for FORCAST on...
Proceedings of SPIE (July 09 2008)

Back to Top