Observations and data reduction

The journal of observations, given in Table , summarizes the spectroscopic and imaging observations carried out with different telescopes and instrumental setups, and those retrieved from the HST archives.

 

Table: Journal of observations

tabular lccrlr telescope - PA () & samplingtex2html_wrap_inline$^a$ & wavelength (Å) & ttex2html_wrap_inline$_exp$ (s) & airmass
WHT - 138 & 0.36 & 4757-5141 & 1800 & 1.32
WHT - 138 & 0.36 & 6493-6881 & 1800 & 1.36
WHT - 138 & 0.36 & 8506-8882 & 3600 & 1.34
WHT - 84 & 0.36 & 4757-5141 & 1800 & 1.27
WHT - 84 & 0.36 & 6493-6881 & 1800 & 1.26
WHT - 84 & 0.36 & 8506-8882 & 3600 & 1.26
WHT - 38 & 0.36 & 4757-5141 & 1800 & 1.27
WHT - 38 & 0.36 & 6493-6881 & 1800 & 1.26
WHT - 38 & 0.36 & 8506-8882 & 3600 & 1.26
NOT & 0.18 & B & 3000 & 1.36
NOT & 0.18 & I & 660 & 1.51
NOT+ARNICA & 0.51 & J & 1760 (440) & 1.25
NOT+ARNICA & 0.51 & Ks & 3520 (880) & 1.5
3.5m CAHA & 0.32 & K & 300 & 1.22
HST - WFPC2 & 0.046 & V (547M) & 300 &
HST - NICMOS2 & 0.075 & J (110W) & 128 &
HST - NICMOS2 & 0.075 & H (160W) & 128 &
footnotesize tex2html_wrap_inline$^a$ Spatial sampling in arcsec per pixel. The linear dispersion is 0.39 Å pixeltex2html_wrap_inline$^-1$ for all the spectroscopic observations.    

Table: Journal of observations

telescope - PA ()	sampling3#3	wavelength (Å)	t4#4 (s)	airmass
WHT - 138	0.36	4757-5141	1800	1.32
WHT - 138	0.36	6493-6881	1800	1.36
WHT - 138	0.36	8506-8882	3600	1.34
WHT - 84	0.36	4757-5141	1800	1.27
WHT - 84	0.36	6493-6881	1800	1.26
WHT - 84	0.36	8506-8882	3600	1.26
WHT - 38	0.36	4757-5141	1800	1.27
WHT - 38	0.36	6493-6881	1800	1.26
WHT - 38	0.36	8506-8882	3600	1.26
NOT	0.18	B	3000	1.36
NOT	0.18	I	660	1.51
NOT+ARNICA	0.51	J	1760 (440)	1.25
NOT+ARNICA	0.51	Ks	3520 (880)	1.5
3.5m CAHA	0.32	K	300	1.22
HST - WFPC2	0.046	V (547M)	300
HST - NICMOS2	0.075	J (110W)	128
HST - NICMOS2	0.075	H (160W)	128

3#3 Spatial sampling in arcsec per pixel. The linear dispersion is 0.39 Å pixel^-1 for all the spectroscopic observations.