Table 2
Total exposure time for the VVVX observations.
Filter | DIT (s) | NDIT | Njitter | Exposure time per pixel (s) |
---|---|---|---|---|
J | 10 | 3 | 2 | 120 |
H | 6 | 2 | 2 | 48 |
Ks | 4 | 1 | 2 | 16 |
Notes. For each OB the DIT is the detector integration time, NDIT is the number of the detector integration time, and Njitter is the number of offsets executed at each of the six pawprint positions. Njitter=2 applies for most of the tile area. Due to the tiling process, for a small fraction of ~8% of the tiles, the Njitter varies from Njitter=1 (at the edges) to Njitter=3, 4 or 6 (in the regions where the pawprints overlap). For details about the tile areas covered for each Njitter value, see Fig. 20 in VISTA/VIRCAM user manual (Ivanov et al. 2021).
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