A census of very-low-mass stars and brown dwarfs in the σ Orionis cluster

N. Lodieu; M. R. Zapatero Osorio; R. Rebolo; E. L. Martín; N. C. Hambly

doi:10.1051/0004-6361/200911966

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Volume 505 / No 3 (October III 2009)

A&A, 505 3 (2009) 1115-1127

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Table C.1:

Near-infrared photometry and its associated errors from the fourth data release of the GCS for previously known members of $\sigma$ Orionis.
RA^a	Dec.^a	Z	Y	J	H	K	$\mu_{\alpha}\cos{\delta}$	$\mu_{\delta}$	Comments^b
h:m:s	d: $^\prime$ : $^{\prime\prime}$	mag	mag	mag	mag	mas/yr	mas/yr
05:36:46.91	-02:33:28.3	14.636 $\pm$ 0.003	14.086 $\pm$ 0.002	13.474 $\pm$ 0.002	12.927 $\pm$ 0.002	12.644 $\pm$ 0.002	8.1	-5.5	M1773275
05:36:58.07	-02:35:19.4	16.457 $\pm$ 0.009	15.691 $\pm$ 0.006	15.043 $\pm$ 0.006	14.540 $\pm$ 0.005	14.174 $\pm$ 0.006	-7.3	-3.0	M1599271
...	...	...	...	...	...	...	...	...	...
05:40:09.32	-02:26:32.6	19.484 $\pm$ 0.085	18.304 $\pm$ 0.039	17.392 $\pm$ 0.027	16.878 $\pm$ 0.039	16.209 $\pm$ 0.032	-	-	SOri 52
05:40:13.96	-02:31:27.4	16.295 $\pm$ 0.008	15.272 $\pm$ 0.005	14.492 $\pm$ 0.004	14.034 $\pm$ 0.004	13.560 $\pm$ 0.003	5.9	-4.1	KJN63
05:40:34.40	-02:44:09.5	14.951 $\pm$ 0.004	14.291 $\pm$ 0.003	13.681 $\pm$ 0.003	13.155 $\pm$ 0.002	12.777 $\pm$ 0.002	-5.9	8.3	BNLJ63

^a Coordinates in J2000 from the UKIDSS GCS DR4. ^b Names in the last column are as follows: M stands for the Mayrit catalogue (Caballero 2008c), KJN for members in Kenyon et al. (2005), BNLJ for objects in Table 3 of Burningham et al. (2005), and SOri nomenclature comes from the work by Béjar et al. (1999), Zapatero Osorio et al. (2000), and Béjar et al. (2001a). Four sources are spectroscopic binaries (M258337, M459224, M873229, M1493050; Maxted et al. 2008) and three (S36, S42, S97) are classified as non-members by Sacco et al. (2008).

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