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Tools and Status


Abell 370
Abell 370 is a massive galaxy cluster in the middle of a field of almost 8,000 galaxies

The Advanced Camera for Surveys (ACS) is a third-generation Hubble Space Telescope (HST) instrument installed in March 2002 during HST Servicing Mission 3B. The ACS CCD Electronics Box and Low Voltage Power Supply incrementally failed in June 2006 and January 2007, causing the loss of the ACS Wide Field Channel (WFC) and High Resolution Channel (HRC). 

The replacement components (CEB-R and LVPS-R) installed on 16 May 2009 during HST Servicing Mission 4 (SM4), successfully restored the function of the WFC but not that of the HRC. Consequently, only the WFC and the Solar Blind Channel (SBC) are available to observers. 

Current Status

HRC is not operational.

SBC is operating nominally.

WFC is operating nominally.

Improved Absolute Astrometry for WFC3 and ACS

Program Information

ACS Instrument Resources

Recent News

Recently Published ISRs

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Most Recent ISRs

Listing Results

Results: 203
Showing 5 matching items
  • (ACS ISR 2023-05) HSTaXe - ACS & WFC3 Cookbook Tutorials

    September 19, 2023B. Kuhn et al.
  • (ACS ISR 2023-04) Dithering for ACS and WFC3 Primes and Parallels

    September 05, 2023J. Anderson and N. A. Grogin
  • (ACS ISR 2023-03) Measuring the Column Dependence of Read Noise in ACS/WFC Bias Frames

    June 22, 2023A. M. Guzman and M. C. McDonald
  • (ACS ISR 2023-02) Systematic Effects in ACS/WFC Absolute Gain Measurements

    March 27, 2023G. S. Anand et al.
  • (ACS ISR 2023-01) Corrections to Commanding Overheads for ACS/WFC Exposures

    February 17, 2023J. E. Ryon and N. A. Grogin

Recently Published STANs

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Filter ACS STANs

Listing Results

Results: 6
Showing 1 matching item

ACS Software Updates


  • Released May 23, 2023
  • Update to the skimage.morphology.remove_small_objects() function in
  • Documentation updates
  • Released May 8, 2023
  • Update ISR name and link for CTE model for acsphotcte
  • Incorporate findsat_mrt into acstools
  • Documentation updates

HSTCAL v2.7.4

  • Released on February 08, 2022
  • CALACS updated to Version 10.3.5

Last Updated: 06/02/2023


Please Contact the HST Help Desk with any Questions