Advanced Camera for Surveys

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

Recently Published ISRs

View all ISRs

Recently Published STANs

View all STANs

ACS Software Updates

ACSTOOLS

v3.7.2

• Released September 11, 2024
• Updated index.rst
• Added ADS link to CITATION.md
• Replace interp2d in utils_findsat_mrt

v3.7.1

• Released May 15, 2024
• Fixed satdet.detsat for scipy.stats.mode
• Improvement of update_dq  in findsat_mrt
• Miscellaneous maintenance

HSTCAL v3.1.0

• Released on December 13, 2024

• CALACS updated to Version 10.4.0

  • Implementation of the "Parallel and Serial CTE correction" for ACS WFC data