High-Level Trigger path information HLT_DoubleMu4_Acoplanarity03 (DoubleMu, DoubleMuParked datasets).
first seen online on run 190456 (/cdaq/physics/Run2012/5e33/v4.4/HLT/V5)
last seen online on run 209151 (/cdaq/special/25ns/v1.1/HLT/V2)
V3: (runs 190456 - 196531) seeded by: L1_DoubleMu0
V4: (runs 198022 - 199608) seeded by: L1_DoubleMu0
V5: (runs 199698 - 209151) seeded by: L1_DoubleMu0
See also the full list of triggers for CMS 2012 open data:Trigger information for 2012 CMS open data