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Table 1.

SOFI observation of W51: Log of observations.

Field HII region α (J2000) δ (J2000) Observing date Exposure time (s) Seeing (″)

(h m s) (° ′ ″) (YYYY-MM-DD) J H Ks J H Ks
I G49.58–00.38 19:23:52.4 14:35:27 2007-08-30 288 288 288 1.05 1.16 1.29
II G49.5–0.4 19:23:43.5 14:31:10 2007-09-28 288 288 288 1.07 1.04 0.95
III G49.2–0.3 19:23:01.9 14:16:17 2007-09-30 288 288 288 1.00 0.88 1.08
IV G48.9–0.3 19:22:13.7 14:02:09 2007-08-27 288 288 230 1.00 1.26 1.13

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