RELICS Observations

188-orbit Hubble Treasury Program (PI Coe)

  • GO 14096 in HST Cycle 23
  • Oct. 9, 2015 - April 2017 (click for full schedule)
  • 168 orbits for clusters + 20 orbits for supernova follow-up
    (8 non-disruptive targets of opportunity)
  • 46 fields lensed by 41 clusters: 5 orbits each
      – 3 orbits ACS (minus archival) in F435W, F606W, F814W
      – 2 orbits WFC3/IR in F105W, F125W, F140W, F160W
      – same 7 filters as the Frontier Fields (0.4 – 1.7 µm)
  • 18 parallel blank fields: 3 orbits each with WFC3/IR + UVIS F350LP
  • 2 epochs separated by 25 – 60 days enabling a supernova search

945 hours of Spitzer Programs
(PIs Bradač, Soifer)

  • All 41 clusters to required depths minus archival time in each of IRAC ch1 (3.2 – 3.9 µm) and ch2 (4.0 – 5.0 µm):
    • GO 12005 (PI Bradač; 100 hours, 26 clusters, 1.2-hour depth)
    • DDT 12123 (PI Soifer; 290 hours, 38 clusters, 5-hour depth)
  • Deeper imaging of ten clusters yieding most high-redshift candidates:
    • DDT 13165 (PI Bradač; 167 hours, 3 clusters, 30-hour depth)
    • DDT 13210 (PI Bradač; 55 hours, 1 cluster, 30-hour depth)
    • GO 14017 (PI Bradač; 333 hours, 6 clusters, 30-hour depth)

See detailed orbit / time allocations in our cluster spreadsheet