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ACS Website
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Hubble Space Telescope
Advanced Camera for Surveys

The Advanced Camera for Surveys (ACS) is a third-generation Hubble Space Telescope (HST) instrument. ACS was installed during HST servicing mission 3B. During servicing mission 4, the ACS WFC was repaired after an electronics malfunction in 2007.

Release of CALACS 2012.2 and new CTE-corrected data products

Late Breaking News

25 Mar 2016 ISR 16-02 by R.J. Avila "SBC Internal Lamp P-flat Monitoring" is now posted.

16 Mar 2016 The new distortion solution has been integrated into the OPUS pipeline and is now available. More details are available on the Distortion Page.

19 Jan 2016 The ACS Instrument Handbook for Cycle 24 (Avila et al.) is now available.

06 Jan 2016 ISR 16-01 by D. Borncamp and P. Lim "Satellite Detection in Advanced Camera for Surveys/Wide Field Channel Images" is now posted.

22 Aug 2015 ISR 15-07 by R. C. Bohlin "Flat Field Determinations Using an Isolated Point Source" is now posted.

26 Jun 2015 ISR 15-06 by V. Kozhurina-Platais "ACS/WFC Revised Geometric Distortion for DrizzlePac" is now posted.

23 Jun 2015 ISR 15-03 by S. Ogaz "Post-Flash Calibration Darks for the Advanced Camera for Surveys Wide Field Channel (ACS/WFC)" is now posted.

12 May 2015 Updated coefficients for the CTE photometric correction formula were derived based on data obtained during Cycle 18 through 22. The updated coefficients are now implemented in the correction calculator web-tool. The new version includes the option of correcting photometry obtained with 3 or 5-pixel aperture radius.

07 Apr 2015 New and improved post-flashed superdark files for ACS/WFC are available in the archive. Hot and warm pixel flag definitions have also been modified. Information about these changes can be found on the new Post-Flash page.

12 Mar 2015 ISR 15-02 by D. Borncamp "Results of the Updated ACS/WFC Distortion Correction" is now posted.

27 Feb 2015 New alignment and artifact correction routines, as well as a cookbook and test data, are available on the new Selfcal page.

02 Feb 2015 ISR 15-01 by R. Avila "Optimizing pixfrac in Astrodrizzle: An example from the Hubble Frontier Fields" is now posted.

15 Dec 2014 The ACS stand alone de-stripe tool has now been updated to include CTE correction and object masking. Now available in ACSTOOLS.

11 Dec 2014 ISR 14-04 by J. Anderson "Local Pixel Bundles: Bringing the Pixels to the People" is now posted.

24 Nov 2014 An improved geometric distortion solution for ACS/WFC, as well as instructions for its usage, are available on the new Distortion Page, pending integration into the OPUS pipeline in later 2015.

19 Nov 2014 ISR 14-03 by J. Anderson & S. Ogaz "hst2galign: an Automated Galaxy-based Alignment Routine" is now posted.

22 Jul 2014 ISR 14-02 by D. Coe et al. "Readout Dark: Dark Current Accumulation During ACS/WFC Readout" is now posted.

07 Jul 2014 The ACS Data Handbook has now been updated to Version 7.2.

15 Apr 2014 ISR 14-01 by S. Ogaz, et al. "Post-Flash Capabilities of the Advanced Camera for Surveys Wide Field Channel (ACS/WFC) " is now posted.

29 Jan 2014 A new version of the ACS Instrument Handbook is now available for cycle 22.

01 Oct 2013 WFC/ACS Post-Flash capability now available for cycle 21.

26 Aug 2013 ISR 13-03 by зbeda, L. &, Kozhurina-Platais, V. "ACS/WFC Geometric Distortion: a time dependency study" is now posted.

03 Jul 2013 ISR 13-02 by Ogaz, S. & Anderson, J. "Column Dependency in Charge Transfer Efficiency Correction" is now posted.

12 Feb 2013 A CTE-correcting online calculator has been released. This script will correct an uploaded file of ACS/WFC photometry.

28 Jan 2013 ISR 13-01 by Ubeda, L. & Anderson, J. "Study of the Evolution of the ACS/WFC Sensitivity Loss" is now posted.

03 Oct 2012 ISR 12-05 by Chiaberge, M. "A new accurate CTE photometric correction formula for ACS/WFC" is now posted.

07 Aug 2012 TIR 12-02 by Ogaz, S. et al. "Charge Transfer Efficiency Correction: WFC Dark Files" is now posted.

31 July 2012 ISR 12-04 by Sokol, J., Anderson, J., & Smith, L. "Assessing ACS/WFC Sky Backgrounds" is now posted.

11 July 2012 AstroDrizzle Replaces MultiDrizzle in the MAST Pipeline.

AstroDrizzle has replaced MultiDrizzle as the software package used by the on-the-fly reprocessing pipeline to combine dithered observations and generate drizzled images.

More information about AstroDrizzle can be found here:

News Archive

Current ACS Status

SBC is operating nominally.

HRC is not operational.

WFC is operating nominally.