Individual Methods Used in SSPP - SSPP

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As Lee et al. (2008a) describe, the SSPP applies a number of different methods for determining stellar parameters. The following table shows the range of g-r color, signal-to-noise ratio (S/N) , and wavelength range used for each method. As T9, T10, and T11 are estimated by the g-r color, there is no S/N limit. The meanings of the names of all of these methods are described in that paper.

`T`_eff			log g			[Fe/H]
Name	Method	g-r	Name	Method	g-r	Name	Method	g-r	S/N	Wavelength range (Å)	Method
T1	ki13	0.0 - 0.8	G1	ki13	0.0 -0.8	M1	ki13	0.0 - 0.8	≥15	4400 - 5500	Spectral matching
T2	k24	0.0 - 0.8	G2	k24	0.0 - 0.8	M2	k24	0.0 - 0.8	≥15	4400 - 5500	Spectral matching
T3	WBG	-0.3 - 0.3	G3	WBG	-0.3 - 0.3	M3	WBG	-0.3 - 0.3	≥10	3900 - 6000	Spectral Matching
T4	ANNSR	-0.3 - 0.8	G4	ANNSR	-0.3 - 0.8	M4	ANNSR	-0.3 - 0.8	≥20	3850 - 9000	Spectral Matching
T5	ANNRR	-0.3 - 1.2	G5	ANNRR	-0.3 - 1.2	M5	ANNRR	-0.3 - 1.2	≥10	3850 - 9000	Spectral Matching
T6	NGS1	-0.3 - 1.3	G6	NGS1	-0.3 - 1.3	M6	NGS1	-0.3 - 1.3	≥10	4500 - 5500	Spectral Matching
			G7	NGS2	0.0 - 1.3	M7	NGS2	0.0 - 1.3	≥20	4500 - 5500	Spectral Matching
			G8	CaI1	0.3 - 1.2	M8	CaIIK1	-0.3 - 0.8	≥10	3850 - 4250	Spectral Matching
						M9	CaIIK2	0.1 - 0.8	≥10	~ 3933	Line index
						M10	CaIIK3	0.1 - 0.8	≥10	~ 3933	Line index
						M11	ACF	0.1 - 0.9	≥15	~ 4000 - 4500	Line index
						M12	CaIIT	0.1 - 0.7	≥20	~ 8480 - 8580	Line index
			G9	CaI2	0.3 - 1.2				≥10	~ 4227	Line index
			G10	MgH	0.3 - 1.2				≥10	~ 5170	Line index
T7	HA24	0.1 - 0.8							≥10	~ 6563	Line index
T8	HD24	0.1 - 0.6							≥10	~ 4102	Line index
T9	T_K	-0.3 - 1.3							N/A	N/A	N/A
T10	T_G	-0.3 - 1.3							N/A	N/A	N/A
T11	T_I	-0.3 - 1.3							N/A	N/A	N/A

HA24 and HD24 are the temperature estimates from the Hα and Hδ line indices in 24 Å widths, respectively. The temperature estimated from Kurucz models is referred to as T_K; T_G is for the Girardi et al. (2004) isochrones. T_I is the temperature determined from Equation 8 in Lee et al. (2008a). The S/N cut is not applied to these temperature estimates because they are computed based on the g-r color. The ki13, k24, NGS1, and NGS2 are grid-matching based methods. WBG is the method from Wilhelm, Beers, & Gray (1999). ANNSR and ANNRR are the neural network approaches. CaIIK1 and CaI1 are determined from the 3850 - 4250 Å region. CaI2 and MgH are methods based on Morrison et al. (2003). CaIIK2 and CaIIK3 are [Fe/H] estimates based on the Ca II K line. ACF is the Autocorrelation Function method, and CaIIT is based on the Ca II triplet line index. S/N is the average signal to noise ratio per pixel over the spectral region 4000 - 8000 Å. See Section 4 in Lee et al. (2008a) for detailed descriptions of individual methods. Normally, the estimator which satisfies the criteria is considered in averaging the estimates.