HRC-I/Chandra X-ray observations towards σ Orionis

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Volume 521 (October 2010)

A&A, 521 (2010) A45

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Table A.2:

Optical/near-infrared counterparts of EPIC/ *XMM-Newton* sources in Franciosini et al. (2006) not listed in Tables 4 or C.1.
NX	$\alpha$	$\delta$	CR	Name	Class
(Fr06)	(J2000)	(J2000)	[ks^-1]
4	05 38 00.56	-02 45 09.7	$9.7\pm1.0$	Mayrit 861230	Possible young star
6	05 38 06.50	-02 28 49.4	$0.67\pm0.18$	Mayrit 717307	Young star
7	05 38 06.74	-02 30 22.8	$19.0\pm0.9$	Mayrit 662301	Young star
11	05 38 13.20	-02 26 08.8	$1.6\pm0.3$	Mayrit 757321	Young star
14	05 38 15.53	-02 42 05.1	$2.7\pm0.4$	[FPS2006] NX 14	Possible galaxy
17	05 38 17.78	-02 40 50.1	$0.97\pm0.17$	Mayrit 498234	Young star
25	05 38 23.32	-02 44 14.2	$0.85\pm0.17$	Mayrit 589213	Young star
26	05 38 23.55	-02 41 31.8	$0.96\pm0.19$	Mayrit 459224	Young star
33	05 38 27.51	-02 35 04.2	$1.5\pm0.4$	Mayrit 265282	Young star
42	05 38 30.98	-02 34 03.8	$0.64\pm0.13$	[FPS2006] NX 42	Possible field star
47	05 38 32.68	-02 31 15.6	$0.57\pm0.13$	[KJN2005] 3.01 325	Field star
50	05 38 33.02	-02 39 27.9	$0.53\pm0.11$	[FPS2006] NX 50	Possible field star?
67	05 38 39.13	-02 28 00.4	$1.3\pm0.2$	Mayrit 487350	Young brown dwarf
82	05 38 45.98	-02 45 23.2	$0.73\pm0.18$	Mayrit 563178	Possible young star
89	05 38 47.66	-02 30 37.4	$2.2\pm0.5$	Mayrit 326008	Young star
97^a	05 38 49.93	-02 41 22.8	$1.08\pm0.15$	Mayrit 332167	Young star
100	05 38 50.39	-02 26 47.7	$1.0\pm0.2$	Mayrit 559009	Young star
101	05 38 51.01	-02 27 45.7	$0.70\pm0.17$	[KJN2005] 1.02 156 AB	Field star
111	05 38 54.92	-02 28 58.3	$0.69\pm0.16$	Mayrit 449020	Young star
114	05 38 56.99	-02 31 25.6	$0.65\pm0.13$	SO110979	Field star
116	05 38 58.84	-02 34 13.2	$0.63\pm0.13$	[D90] 3	Radiogalaxy
118	05 38 59.23	-02 33 51.4	$0.25\pm0.07$	Mayrit 252059	Young star
147	05 39 12.32	-02 30 06.4	$2.1\pm0.4$	Mayrit 544049	Possible young star
149	05 39 14.47	-02 28 33.4	$10.9\pm0.6$	Mayrit 631045	Possible young star
157	05 39 18.97	-02 30 55.6	$3.0\pm0.4$	Mayrit 596059	Young star?
160	05 39 20.97	-02 30 33.5	$5.8\pm0.5$	Mayrit 633059	Young star
167	05 39 26.73	-02 26 17.4	$2.9\pm0.6$	Mayrit 856047	Young star
169	05 39 50.56	-02 38 27.0	$1.8\pm0.3$	[SWW2004] 222 AB	Field star
174	05 39 39.83	-02 33 16.0	$19.8\pm1.0$	Mayrit 841079	Young star
175	05 39 39.99	-02 43 09.7	$1.9\pm0.5$	Mayrit 931117	Young star

Notes. ^(a) Star NX 97 (Mayrit 332167, [SWW2004] 200) has colours, lithium, radial velocity, and H $\alpha$ emission consistent with membership in cluster (Sacco et al. 2008). Its Mayrit number is first given here.

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