BINARY X-RAY PULSARS IN THE SMC

The major discovery that the pulsar period distribution in the SMC appears to be bimodal and that this may have major evolutionary consequences is presented in our Nature paper and the supplementary material.

The figure below shows the location of the pulsars systems against a backdrop of an HI map (Stanimirovic et al., 1999) of the SMC. The pulse periods in seconds are shown.

$Description: Description: Description: Description: Y:\public_html\smc\index_files\image001.jpg$

TABLE OF PULSARS

A list of all known X-ray pulsars may be found in this Table. To minimise confusion arising from long, similar source names we advocate using the SXP names in the future. This identity is created simply from the acronym SXP (Small magellanic cloud X-ray Pulsar) followed by the pulse period in seconds to three significant figures.

Table 1: List of known X-ray pulsars in the SMC. The [MA93] object numbers come from Meyssonnier & Azzopardi, 1993.

Short ID	RA (2000)	Dec (2000)	Full or alternative name

SXP0.72	01:17:05.2	-73:26:36.0	SMC X-1
SXP0.92	00:45:35.0	-73:19:02.0	PSR J0045-7319
SXP2.16	01:19	-73:12	XTE SMC2165 unknown position
SXP2.37	00:54:34.0	-73:40:43.0	SMC X-2
SXP2.76	00:59:12.8	-71:38:44.0	RX J0059.2-7138
SXP3.34	01:05:02.6	-72:10:55.6	AX J0105-722, RX J0105.1-7211, [MA93]1506
SXP4.78	00:52	-72:19	XTE J0052-723 unknown position
SXP6.85	01 02 53.1	-72 44 33	XTE J0103-728
SXP6.88	00 54 46.2	-72 25 21	INTEGRAL Source 2 = [MA93]798 = [M2002]SMC 31155
SXP7.78	00:52:07.7	-72:25:43.7	SMC X-3
SXP7.92	01:01:56	-72:32:36.0	XTE SMC pulsar
SXP8.02	01:00:42.8	-72:11:32.0	CXOU J010042.8-721132 = AXP?
SXP8.88	00:51:52.0	-72:31:51.7	RX J0051.8-7231,1E0050.1-7247, [MA93]506
SXP9.13	00:49:13.6	-73:11:37.0	AX J0049-732, RX J00492-7311
SXP11.5	01 04 41.4	-72 54 04.6	IGR J01054-7253, [M2002] smc 59977
SXP11.87	00 48 14.0	-73 22 04	XMMUJ004814.0-732204
SXP15.3	00:52:15.3	-73:19:14.0	RX J0052.1-7319, [MA93]552
SXP16.6	00:50	-73:16	XTE J0050-732 (= SXP8.8 ??) unknown position
SXP18.3	00:49:11.4	-72:49:39.0	XTE SMC pulsar XTE J0055-727, XMMU J004911.4-724939
SXP22.1	01:17:40.5	-73:30:52.0	RX J0117.6-7330,X Nova92, [MA93]1845
SXP25.5	00 48 14.1	-73 10 04.0	XMMU J004814.1-731003
SXP31.0	01:11:09.0	-73:16:46.0	XTE J0111.2-7317
SXP34.1	00:55:27.9	-72:10:58.0	Probably not a BeX system after all.
SXP46.6	00:53:53.8	-72:26:35.0	1WGA 0053.8-7226,XTE J0053-724
SXP51.0			XTE SMC pulsar with unknown position? May be SXP25.5??
SXP59.0	00:54:57.4	-72:26:40.3	RX J0054.9-7226,XTE J0055-724, [MA93]810
SXP65.8	01:07:12.6	-72:35:33.8	CXOU J010712.6-723533
SXP74.7	00:49:04.6	-72:50:53.0	RX J0049.1-7250, AX J0049-729
SXP82.4	00:52:09	-72:38:03	XTE J0052-725, MACS J0052-726#004
SXP89.0			XTE SMC pulsar unknown position
SXP91.1	00:50:55.8	-72:13:38.0	AX J0051-722 ,RX J0051.3-7216, [MA93]413, ATel 3396
SXP95.2	00:52	-72:45	XTE SMC95 pulsar unknown position
SXP101	00:57	-73:25	AX J0057.4-7325, RX J0057.3-7325 unknown position
SXP138	00:53:23.8	-72:27:15.0	CXOU J005323.8-722715, [MA93]667
SXP140	00:56:05.2	-72:22:00.0	XMMU J005605.2-722200,2E0054.4-7237, [MA93]904
SXP144			XTE SMC pulsar unknown position
SXP152	00:57:50.3	-72:07:56.0	CXOU J005750.3-720756, [MA93]1038
SXP153	01:07:43	-71:59:53	XMMUJ010743.1-715953 (Coe et al 2012) [MA 93] 1640
SXP169	00:52:54.0	-71:58:08.0	XTE J0054-720, AX J0052.9-7158, [MA93]623
SXP172	00:51:50.0	-73:10:40.0	AX J0051.6-7311, RX J0051.9-7311, [MA93]504
SXP175	01:01:52.5	-72:23:35	RX J0101.8-7223 [MA93]1288 ATel 3311
SXP202A	00:59:21	-72:23:16.0	1XMMU J005921.0-722317
SXP202B	00:59:29.0	-72:37:03	XMMU J005929.0-723703
SXP214	00:50:11.0	-73:00:25	XMMU J005011.2-730026 (Coe et al 2011)
SXP264	00:47:23.7	-73:12:27.0	XMMUJ004723.7-731226, RXJ0047.3-7312,[MA93]172
SXP280	00:58:08.0	-72:03:30.0	AX J0058-72.0, [MA93]1036
SXP293	00:58:12.6	-72:30:48	RX J0058.2-7231, XTE J0051-727
SXP304	01:01:02.7	-72:06:58.0	CXOU J010102.7-720658, [MA93]1240,RXJ0101.0-7206
SXP323	00:50:44.8	-73:16:06.0	AX J0051-73.3,RXJ0050.7-7316, [MA93]387
SXP327	00:52:52.5	-72:17:14.9	[SHP 2000] SMC_45
SXP342	00:54:03.8	-72:26:32	XMMU J005403.8-722632
SXP348	01:03:14.2	-72:09:14.3	SAX J0103.2-7209, RX J0103-722, [MA93]1367
SXP455	01:01:20.5	-72:11:18.0	RX J0101.3-7211, [MA93]1257
SXP504	00:54:55.6	-72:45:10.0	CXOU J005455.6-724510,RXJ0054.9-7245,AXJ0054.8-7244, [MA93]809
SXP565	00:57:36.2	-72:19:34.0	CXOU J005736.2-721934, [MA93]1020
SXP645	00:55:35.2	-72:29:06	XMMU J005535.2-722906
SXP701	00:55:17.9	-72:38:53.0	XMMU J005517.9-723853
SXP726	01:05:55.3	-72:03:50.2	RXJ0105.9-7203
SXP756	00:49:42.1	-73:23:14.1	AX J0049.4-7323, RX J0049.7-7323, [MA93]315
SXP893	00:49:29.8	-73:10:58.0	CXO J004929.7-731058 Laycock et al 2010 ApJ 716, 1217.
SXP967	01:02:06.7	-71:41:15.8	CXOU J010206.6-714115
SXP1062	01:27:46	-73:32:56.4	2dFS 3831 Haberl et al 2012 A&A 537, L1
SXP1323	01:03:37.5	-72:01:33	RX J0103.6-7201, [MA93] 1393
SXP4693	00:54:46.3	-72:25:23	CXOU J005446.3-722523 Laycock et al 2010 ApJ 716, 1217.

FINDING CHARTS

A list of finding charts for many of the optically identified SXP objects may be found here.

IMPORTANT PUBLICATIONS ON THE SMC

A list of random papers that I think are of value to people trying to understand the history of the SMC may be found here – apologies for omissions!

Malcolm Coe
26 Apr 2012