Discrepancies between spectroscopy and HST photometry in tagging multiple stellar populations in 22 globular clusters

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Table 2.

Number of stars identified from spectroscopy in each GC.

GC	PCM	Fe	Na	Na–Δcol3	Fe	Na	Na–Δcol3	Ref. spectroscopy
	M19	M19	M19	M19	us	us	us
NGC 104	10	10	10	10	17	17	17	Carretta et al. (2009a)
NGC 288	18	18	18	18	25	24	24	Carretta et al. (2009a)
NGC 362	9	9	9	9	15	15	15	Carretta et al. (2013)
NGC 1851	10	10	10	10	26	26	26	Carretta et al. (2011b)
NGC 2808	39	39	39	38	50	50	50	Carretta (2015)
NGC 3201	22	22	22	22	28	28	28	Carretta et al. (2009a)
NGC 4590	19	22	17	17	30	23	23	Carretta et al. (2009a)
NGC 4833	14	14	11	11	18	14	14	Carretta et al. (2014)
NGC 5904	10	10	10	10	16	16	16	Carretta et al. (2009a)
NGC 6093	9	9	8	8	31	29	29	Carretta et al. (2015)
NGC 6121	11	11	11	11	27	27	27	Marino et al. (2008)
NGC 6205	23	23	23	23	26	26	26	Johnson & Pilachowski (2012)
NGC 6254	21	21	18	18	32	25	25	Carretta et al. (2009a,b)
NGC 6388					35	35	35	Carretta & Bragaglia (2023)
NGC 6397	19	19	13	13	28	18	18	Carretta et al. (2009a,b)
NGC 6535	13	13	11	11	19	16	16	Bragaglia et al. (2017)
NGC 6715	18	18	18	18	34	34	34	Carretta et al. (2010b)
NGC 6752	22	22	20	20	27	25	25	Carretta et al. (2007, 2009b)
NGC 6809	11	11	7	7	27	21	21	Carretta et al. (2009a)
NGC 6838	14	14	14	14	23	23	23	Carretta et al. (2009a,b)
NGC 7078	12	12	8	8	28	21	21	Carretta et al. (2009a)
NGC 7099	17	17	7	7	27	16	16	Carretta et al. (2009a,b)

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