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Table 1

Characteristics of the OBs used in UltraVISTA season 1.

OB description Filter DIT [s] NDIT Jitter parameters Nesting Npawprints Total exp. [s] NOBs
Pattern Amplitude [′′] Njit

Y Y 30 4 Random 60 30 FPJME 1 3600 36
J J 30 4 Random 60 30 FPJME 1 3600 37
H H 6 10 Random 60 60 FPJME 1 3600 36
Ks long OB Ks 10 6 Random 60 60 FPJME 1 3600 18
Ks short OB Ks 10 6 Random 60 30 FPJME 1 1800 27
NB118 single paw NB118 300 1 Random 61 11 FPJME 1 3300 6
NB118 three paws NB118 280 1 Random 61 4 FJPME 3 3360 4

Notes. The “Amplitude” column gives the Maximum Jitter Amplitude, where a value of 60′′ corresponds to jitter positions being drawn from a random, uniform distribution over a box of side length 120′′, centered on the nominal centre coordinates of the given pawprint. The “Nesting” column indicates the order in which different operations are done, see text. The “Npawprints” column gives the number of pawprints done by the given OB. To cover the contiguous UltraVISTA field in an approximately uniform manner, a set of 6 OBs of type Npawprints = 1 are needed, each centered on the pawprint in question. The “Total exp.” column gives the total exposure time contained in the OB; this number is DIT  ×  NDIT  ×  Njit  ×  Npawprints. The “NOBs” column gives the number of OBs of the given type that are associated with the data covered by this paper.

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