ACS Anneal Dates

Anneal Dates

ACS Annealing

This page contains a listing of all past and future anneal dates for the ACS/WFC detector. As part of the CCD Hot Pixel Annealing calibration program, the ACS detector is periodically annealed in an attempt to slow the growth of hot pixels that arise from radiation damage. For each anneal, the thermoelectric coolers are shutdown and the heaters are powered on to warm the detector up to about 19ºC over the span of ~12 hours. Before and after each anneal, four 1040 second darks frames and 4 bias frames are taken for monitoring purposes to determine the efficiacy of the annealing process as the detector continues to degrade from radiation damage. 

timeline

Upcoming Anneal Windows for Cycle 28

Dec 07, 2020 - Dec 14, 2020
Jan 04, 2021 - Jan 11, 2021
Feb 01, 2021 - Feb 08, 2021
Mar 01, 2021 - Mar 08, 2021
Mar 29, 2021 - Apr 05, 2021
Apr 26, 2021 - May 03, 2021
May 24, 2021 - May 31, 2021
Jun 21, 2021 - Jun 28, 2021
Jul 19, 2021 - Jul 26, 2021
Aug 16, 2021 - Aug 23, 2021
Sep 13, 2021 - Sep 20, 2021
Oct 11, 2021 - Oct 18, 2021

Completed Anneals

Completed Anneals 

Note, this list of completed anneals only contains anneals occuring after Servicing Mission 4 (SM4) which occurred in May of 2009.

LAST UPDATED: 11/11/2020

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