**Table 2:** Chromospheric index compilation for the EH stars: a sample page.
Name	S	Log R' $_{\rm HK}$	Data type	Ref.
HD 10697	0.1279		1 obs in 1 day (01/09/78 to 01/09/78)	R19
	0.1423		2 obs in 10 days (15/11/79 to 24/11/79)	R19
		-5.02	35 obs in 3 years	R34
	0.149	-5.08	57 obs in 25 month bins	R52
HD 12661		-5.00	1 obs 1998-99	R33
	0.14	-5.12	30 obs in 2 years	R38
	0.150	-5.08	52 obs in 16 month bins	R52
HD 16141	0.145		1979 individual	R05
	0.145		R1; R6; R5; R10; R3	R17
	0.1452		1 obs in 1 day (15/11/79 to 15/11/79)	R19
		-5.05	46 obs in 4 years	R37
	0.145	-5.11	70 obs in 23 month bins	R52
	0.085		individual	CASLEO
HD 17051	0.225	-4.65	1992 individual	R28
		-4.65		R66
	0.2074		individual	CASLEO
HD 19994	0.173	-4.88	12 obs in 4 month bins	R52
		-4.77	45 obs in 6 years	R53
	0.1018		individual	CASLEO
HD 20367	0.282	-4.50	2 obs in 1 month bins	R52
HD 23079	0.164	-4.94	1992 individual	R28
		-4.96	individual	R41
	0.1196		individual	CASLEO
HD 23596	0.150	-5.06	1 obs in 1 month bins	R52
HD 27442	0.062		individual	CASLEO
HD 28185		-5.00	1 obs 1998-99	R33
	0.143		individual	CASLEO
HD 30177		-5.08	individual	R41
	0.1205		individual	CASLEO
HD 33636		-4.81	21 obs in 3 years	R45
	0.180	-4.85	25 obs in 13 month bins	R52
	0.135		individual	CASLEO

References:

CASLEO: this paper R23: Montes et al. (1997) R46: Tinney et al. (2002b)

R01: Vaughan & Preston (1980) R24: Montes & Martin (1998) R47: Marcy et al. (2002)

R02: Duncan (1981) R25: Montes et al. (1999) R48: King et al. (2003)

R03: Soderblom (1985) R26: Donahue et al. (1996) R49: Butler et al. (2003)

R04: Soderblom et al. (1993) R27: Baliunas et al. (1996) R50: Mayor et al. (2003)

R05: Middelkoop (1982) R28: Henry et al. (1996) R51: Hatzes et al. (2003)

R06: Vaughan et al. (1981) R29: Saar & Osten (1997) R52: Wright et al. (2004)

R07: Middelkoop et al. (1981) R30: Marcy et al. (1998) R53: Mayor et al. (2004)

R08: Durney et al. (1981) R31: Marcy et al. (1999) R54: Butler et al. (2004)

R09: Baliunas et al. (1983) R32: Fischer et al. (1999) R55: Fischer et al. (2005)

R10: Noyes et al. (1984) R33: Strassmeier et al. (2000) R56: Lovis et al. (2005)

R11: Montesinos et al. (1987) R34: Vogt et al. (2000) R57: Sozzetti et al. (2004)

R12: Marcy et al. (1997) R35: Udry et al. (2000) R58: Fischer et al. (2002b)

R13: Lachaume et al. (1999) R36: Charbonneau et al. (2000) R59: Butler et al. (2000)

R14: Herbig (1985) R37: Marcy et al. (2000b) R60: Santos et al. (2004a)

R15: Soderblom & Clements (1987) R38: Fischer et al. (2001) R61: Santos et al. (2000b)

R16: Houvelin et al. (1988) R39: Naef et al. (2001) R62: Henry et al. (2000b)

R17: Young et al. (1989) R40: Pepe et al. (2002) R63: Butler et al. (1998)

R18: Strassmeier et al. (1990) R41: Tinney et al. (2002a) R64: Jones et al. (2003)

R19: Duncan et al. (1991) R42: Fischer et al. (2002a) R65: Marcy et al. (2001)

R20: Soderblom et al. (1991) R43: Butler et al. (2002) R66: Rocha-Pinto & Maciel (1998)

R21: Soderblom & Mayor (1993) R44: Udry et al. (2002)

R22: Baliunas et al. (1995a) R45: Vogt et al. (2002)

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