Astrometry with the MCAO instrument MAD - An analysis of single-epoch data obtained in the layer-oriented mode

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Volume 532 (August 2011)

A&A, 532 (2011) A16

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Table 1

Summary of the observations of the clusters NGC 6388 and 47 Tuc.

	NGC 6388			47 Tuc

Frame	ExpT	Seeing	FWHM	ExpT	Seeing	FWHM
	[s]	V []	K_s []	[s]	V []	Brγ []

1	240	0.43	0.098	30	1.09	0.178
2	240	0.41	0.094	30	1.15	0.186
3	240	0.49	0.099	30	1.13	0.206
4	240	0.55	0.094	30	1.08	0.169
5	240	0.51	0.090	30	1.09	0.178
6	240	0.41	0.095	30	1.08	0.147
7	240	0.38	0.097	30	1.15	0.157
8	240	0.37	0.098	30	1.17	0.193
9	240	0.39	0.103	30	1.17	0.173
10	240	0.40	0.106	30	1.15	0.178
11	120	0.45	0.126	30	1.14	0.145
12	120	0.43	0.117	30	1.15	0.148
13	120	0.45	0.130	30	1.11	0.144
14	120	0.50	0.158	30	1.15	0.166
15	120	0.51	0.130	30	1.14	0.183
16	120	0.49	0.155	30	1.15	0.183
17	120	0.48	0.170	30	1.19	0.187
18	120	0.49	0.140	30	1.13	0.200
19	120	0.45	0.119	30	1.11	0.174
20	120	0.41	0.133
21	120	0.42	0.120
22	120	0.44	0.131
23	120	0.54	0.139
24	120	0.56	0.158
25	120	0.43	0.176
26	120	0.50	0.153
27	120	0.46	0.143
28	120	0.48	0.135
29	120	0.47	0.120
30	120	0.47	0.134

Notes. The seeing values are measured by the DIMM seeing monitor in the V band and the FWHM value corresponds to the one measured in the extracted PSF, used to fit the positions of the stars. In the case of the NGC 6388 data, the first five frames are taking using only ground-layer correction and frames 6–30 are in full MCAO mode. In the case of the 47 Tuc data, all frames were taken using ground-layer correction.

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