Chemical composition of extremely metal-poor stars in the Sextans dwarf spheroidal galaxy

W. Aoki; N. Arimoto; K. Sadakane; E. Tolstoy; G. Battaglia; P. Jablonka; M. Shetrone; B. Letarte; M. Irwin; V. Hill; P. Francois; K. Venn; F. Primas; A. Helmi; A. Kaufer; M. Tafelmeyer; T. Szeifert; C. Babusiaux

doi:10.1051/0004-6361/200911959

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Volume 502 / No 2 (August I 2009)

A&A, 502 2 (2009) 569-578

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Table 1:

Objects and observation details.
Star	RA(2000)	Dec(2000)	Observation	Exposure^a	S/N^b	$V_{\rm H}$ (km s^-1)	HJD
S 10-14	10 13 34.70	-02 07 57.9	Jan. 2007	330 (11)	36	$233.86 \pm 0.08$	2 454 126
S 11-13	10 11 42.96	-02 03 50.4	Jan. 2007	60 (2)	21	$224.71 \pm 0.08$	2 454 128
S 11-37	10 13 45.48	-01 56 16.3	Jan. 2007	240 (8)	32	$221.79 \pm 0.08$	2 454 128
S 12-28	10 11 17.15	-02 00 24.0	Jan. 2007	240 (8)	39	$201.96 \pm 0.05$	2 454 126
S 14-98	10 13 24.48	-02 12 03.5	Jan. 2007	85 (3)	17	$220.7 \pm 0.13$	2 454 128
S 15-19	10 11 26.92	-02 05 41.7	May 2005	390 (13)	46	$226.05 \pm 0.11$	2 453 511
HD 88609	10 14 28.98	+53 33 39.4	Jan. 2007	10.5 (4)	440	$-37.58 \pm 0.02$	2 454 126
S 10-12^c	10 13 52.1	-02 02 55.1	Jan. 2007	30 (1)	11	...	2 454 126
S 11-36^c	10 13 45.5	-01 56 16.3	Jan. 2007	240 (8)	8	...	2 454 126

^a Total exposure time (minutes) and the number of exposures; ^b S/N ratio per 1.8 km s^-1 pixel at 5180 Å;
^c these stars were observed, but are not included in the present work (see text).

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