2013MNRAS.431..252S

Query : 2013MNRAS.431..252S

2013MNRAS.431..252S - Mon. Not. R. Astron. Soc., 431, 252-278 (2013/May-1)

An analysis of optical periods in individual Small Magellanic Cloud Be/X-ray pulsars.

SCHMIDTKE P.C., COWLEY A.P. and UDALSKI A.

Abstract (from CDS):

A detailed analysis of optical photometry for 51 Small Magellanic Cloud Be/X-ray pulsars has been undertaken with the goal of better understanding their modes of variability. Because two pulsars are tentatively associated with the same optical counterpart, the photometric behaviour of 50 unique sources is discussed. We find that 22 systems show signatures consistent with orbital periods, and 29 systems exhibit non-radial pulsations (6 of these sources show both types of variation). No clear photometric period could be identified for five systems. There is a slight tendency for optical pulsations to be found in redder and/or fainter systems, while the orbital periods do not depend on system colour or magnitude. The period analysis of some sources is complicated by the presence of a changing pulsation period or by a period that is shorter than the daily sampling interval in the photometric surveys. We use synthetic data sets to illustrate the difficulty in solving these problems. Consequently, for a few systems, we find that previously determined `orbital' periods are most likely aliases of non-radial pulsation periods.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): stars: emission-line, Be - pulsars: general - stars: variables: general - X-rays: binaries

Nomenclature: SXP SSSA (Nos 202A-B).

Simbad objects: 60

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Number of rows : 60
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 AX J0043-737 X 00 42 39.9 -73 40 25           ~ 14 0
2 PSR J0045-7319 Psr 00 45 35.2606875816 -73 19 03.269105220   15.97 16.18   16.30 B0.5-B2IV-V 183 0
3 [MA93] 172 HXB 00 47 23.3388222768 -73 12 27.370134648   15.85 15.85   15.872 B1-B1.5V 52 0
4 SXP 11.87 HXB 00 48 13.47 -73 22 03.1   14.54 14.66     ~ 13 0
5 SXP 25.5 HXB 00 48 14.1209478096 -73 10 03.933642936 15.06 15.56 15.847   15.693 B1.5e 28 1
6 RX J0049.0-7250 HXB 00 49 03.35 -72 50 52.4   17.01 16.898   16.686 B3:V 51 0
7 SXP 18.3 HXB 00 49 11.4583157496 -72 49 37.499240568 15.16 15.80 15.608 15.42 15.384 ~ 40 0
8 RX J0049.2-7311 HXB 00 49 13.6255324536 -73 11 37.869710892   16.52 16.555   16.320 B1e 46 1
9 [MA93] 300 HXB 00 49 29.848 -73 10 58.33 15.36 15.85 16.249 15.38 15.950 B1e 23 1
10 LIN 139 HXB 00 49 42.0078068952 -73 23 14.676382752 14.09 15.00 14.98   14.70 O9.5-B0.5III-V 73 0
11 SXP 214 HXB 00 50 11.2696971720 -73 00 25.972319016   15.22 15.33 15.47 15.207 B9(II) 17 0
12 V* DZ Tuc HXB 00 50 44.7079466208 -73 16 05.430164196 14.46 15.37 15.396   15.225 B0-B0.5V 76 0
13 [MA93] 413 HXB 00 50 56.9992401408 -72 13 34.582439136   14.97 15.05     B0.5III-V 59 0
14 LIN 193 HXB 00 51 52.0250520000 -73 10 34.140066780 13.39 14.38 14.459 14.24 14.28 O9.5-B0V 72 0
15 AzV 102 HXB 00 51 53.1358981896 -72 31 48.721904580 13.66 14.79 14.38   14.40 B0-5(II) 71 0
16 LIN 198 HXB 00 52 05.6251611744 -72 26 04.228773036 13.86 14.91 14.927 14.91 14.794 B0-5(II)e 165 0
17 SXP 82.4 HXB 00 52 08.9591015832 -72 38 03.307691544 14.33 15.15 15.23   14.83 B1-5(II)e 37 0
18 LIN 203 HXB 00 52 13.9956976512 -73 19 18.812945496   14.66 14.67   14.534 O9.5IIIe/B0Ve 87 0
19 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11152 1
20 SXP 327 HXB 00 52 52.2273385944 -72 17 15.106259724 15.83 16.41 16.62 16.43 16.82 ~ 25 0
21 LIN 221 HXB 00 52 55.2656173752 -71 58 06.287817144 14.37 15.47 15.53   15.34 B0-B1III-V 48 0
22 RX J0053.4-7227 HXB 00 53 23.8589408040 -72 27 15.445929456 15.06 16.11 16.202   16.125 B1-B2IV-V 31 0
23 RX J0053.9-7226 HXB 00 53 55.181 -72 26 44.88   14.65 14.72   14.757 B1III 93 0
24 SXP 342 HXB 00 54 03.8561131320 -72 26 32.965087524 13.82 14.95 14.94 14.80 14.79 ~ 19 0
25 X SMC X-2 HXB 00 54 33.43 -73 41 01.3 13.77 16.40 16.38   14.67 O9.5III-V 131 0
26 [MA93] 798 HXB 00 54 46.3702539288 -72 25 22.795778784 14.39 15.50 15.569   15.346 B1e 26 0
27 LIN 268 HXB 00 54 55.8845128080 -72 45 10.958407380 13.83 14.73 15.003 14.73 14.784 B1e 49 0
28 [MA93] 810 HXB 00 54 56.1754603176 -72 26 47.859057060 14.17 15.24 15.28   15.327 O9V 72 0
29 RX J0055.2-7238 HXB 00 55 18.4407888192 -72 38 52.029653424   16.02 16.022   15.711 O9.5V 36 0
30 SXP 645 HXB 00 55 35.1438131544 -72 29 06.635018364 13.60 14.65 14.69 14.21 14.67 ~ 20 0
31 [MA93] 904 HXB 00 56 05.5347974352 -72 21 59.452153740   15.84 15.88   15.494 B1V 33 0
32 NGC 330 Cl* 00 56 18.55 -72 27 45.1 9.37 9.76 9.55   8.89 ~ 410 0
33 RX J0057.4-7325 HXB 00 57 27.000 -73 25 19.55 14.56 15.62 15.67 15.43 15.67 B3-B5Ib-II? 34 0
34 [MA93] 1020 HXB 00 57 36.0162576624 -72 19 34.056483744 14.89 15.95 16.008 15.79 15.806 B0/4e 42 0
35 [MA93] 1036 HXB 00 57 49.5745148088 -72 02 35.873596896   15.52 15.64     B0-B2III-V 54 0
36 [MA93] 1038 HXB 00 57 50.3868809664 -72 07 56.130650112 14.63 15.64 15.69   15.420 B1-2(Be-Fe) 42 0
37 SXP 7.92 HXB 00 57 58.5236957520 -72 22 28.983943560     15.788   15.846 ~ 21 0
38 RX J0058.2-7231 HXB 00 58 12.5869662000 -72 30 48.759613812 13.91 14.98 14.87   14.62 B0IIIe 60 0
39 RX J0059.2-7138 HXB 00 59 12.7444006824 -71 38 44.962383408   14.07 14.01 14.36   B1-B1.5II-III 84 0
40 SXP 202 HXB 00 59 21.0398312736 -72 23 17.305459368 13.81 14.96 14.97   15.07 B0-B1V 42 0
41 [MA93] 1147 HXB 00 59 28.6840366080 -72 37 04.202082408 14.55   15.31     B0-5(III)e 16 0
42 [MA93] 1240 HXB 01 01 02.8880678424 -72 06 58.964665824   15.68 15.757 15.52 15.576 B0-B2III-V 48 0
43 [MA93] 1257 HXB 01 01 20.6635900032 -72 11 18.965108724 14.41 15.36 15.49   15.53 B0.5-B2IV-V 47 0
44 LIN 389 HXB 01 01 52.2957451944 -72 23 34.045082376 13.84 14.57 14.94 15.48 14.85 O9-B0III 39 0
45 AzV 285 HXB 01 01 55.8081003144 -72 32 36.404929536 12.72 13.93 14.02   14.01 O6.5-7.5Ve 16 0
46 AzV 294 HXB 01 02 06.6797731272 -71 41 16.119360960 13.54 14.52 14.60 15.20 14.42 B0-B0.5III-V 31 0
47 SXP 6.85 HXB 01 02 53.3180253744 -72 44 35.166214716   14.51 14.59     O9.5-B0IV-V 59 0
48 [MA93] 1367 HXB 01 03 13.9173060552 -72 09 14.258500452   14.70 14.79 15.0   B0.5IV-V 92 2
49 [MA93] 1393 HXB 01 03 37.5349856136 -72 01 33.204096336   14.54 14.65     B0III-V 73 0
50 [M2002] SMC 59367 HXB 01 04 29.419 -72 31 36.54 14.52 15.38 15.45 15.51   B1V 11 0
51 SXP 11.5 HXB 01 04 42.28 -72 54 03.7   14.81 14.81     O8.5-9.5IIIe 31 1
52 [MA93] 1506 Em* 01 05 02.5419373680 -72 10 56.214484680 14.57 15.57 15.64   15.65 B1-5(II)e 13 0
53 [MA93] 1507 Em* 01 05 03.1595327784 -72 11 02.958191160     15.1     ~ 3 0
54 [MA93] 1517 Em* 01 05 07.6763630472 -72 11 49.381956276     15.7     ~ 7 0
55 RX J0105.1-7211 HXB 01 05 09.941 -72 11 47.00   15.62 15.63 18.3   B1-B2III-V 53 1
56 [MA93] 1557 HXB 01 05 55.4 -72 03 49 14.63 15.61 15.63 15.54   ~ 25 0
57 SXP 65.8 HXB 01 07 12.6098206008 -72 35 33.884245680 14.72 15.52 15.64 15.5 15.73 B1-B1.5II-III 24 0
58 RX J0111.2-7317 HXB 01 11 08.5770101712 -73 16 46.308129384 14.40 15.42 15.52   15.29 B0.5-1Ve 71 0
59 [MA93] 1845 HXB 01 17 40.1630558064 -73 30 50.523690888 13.30 14.14 14.18   14.09 B1-3(II)e 55 0
60 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17438 0

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