Table 1: Telescope and Instrument configurations used to collect our GJ 406 dataset.

Start	End	Instrument (configuration)	Telescope	Date
m	m
0.35	0.56	ISIS (blue arm)	WHT	2001 Jan. 29
0.55	0.80	ISIS (red arm)	WHT	2001 Jan. 29
0.79	1.20	NICMOS (G096)	HST	1998 June 19
1.05	1.95	NICMOS (G141)	HST	1998 June 19
1.3	2.59	NICMOS (G206)	HST	1998 June 19
2.48	2.60	SWS (06 1A)	ISO	1996 June 26
2.60	2.75	SWS (06 1A)	ISO	1996 June 26
2.74	2.90	SWS (06 1A)	ISO	1996 June 26
2.88	3.02	SWS (06 1B)	ISO	1996 June 26
3.03	3.23	CGS4 (150 l/mm)	UKIRT	1993 April 20
3.21	3.40	CGS4 (150 l/mm)	UKIRT	1993 April 20
3.36	3.75	CGS4 (75 l/mm)	UKIRT	1992 May 7
3.76	4.15	CGS4 (75 l/mm)	UKIRT	1992 May 7
4.51	4.90	CGS4 (75 l/mm)	UKIRT	1992 October 26