Deep Drilling Fields

The Deep Drilling Field program includes 5 DDF fields, chosen to maximize multi-wavelength coverage with pre-existing surveys. One of the pointings, the Euclid Deep Field South (EDFS) pointing, is a larger field and so is split between an ‘a’ and ‘b’ pointing which share the DDF visits.

The DDFs use a total of about 6.5% of the total survey time. Each DDF receives on the order of 23,000 visits, except COSMOS which receives approximately double that. The COSMOS field has been selected to receive additional coverage, in order to reach 10-year DDF depth within the first 3 years of the survey as a pathfinder for Data Management processing and science opportunities.

The cadence for DDF visits is still under development, but will retain sequences of 10-20 visits per filter within a night, offering the opportunity for fainter per-night measurements as well as sub-minute time sampling.

	ELAISS1	XMM_LSS	ECDFS	COSMOS	EDFS_a	EDFS_b
RA	9.45	35.57	52.98	150.11	58.9	63.6
Dec	-44.02	-4.82	-28.12	2.23	-49.32	-47.6
Gal l	311.29	171.1	224.07	236.78	257.9	254.48
Gal b	-72.88	-58.91	-54.6	42.13	-48.46	-45.77
Eclip l	346.66	31.59	40.81	151.39	32	40.97
Eclip b	-43.2	-17.92	-45.44	-9.34	-66.61	-66.6