1997A&A...323..853M


Query : 1997A&A...323..853M

1997A&A...323..853M - Astronomy and Astrophysics, volume 323, 853-875 (1997/7-3)

New massive X-ray binary candidates from the ROSAT Galactic Plane Survey. I. Results from a cross-correlation with OB star catalogues.

MOTCH C., HABERL F., DENNERL K., PAKULL M. and JANOT-PACHECO E.

Abstract (from CDS):

We report the discovery of several new OB/X-ray accreting binary candidates. These massive systems were found by cross-correlating in position SIMBAD OB star catalogues with the part of the ROSAT all-sky survey located at low galactic latitudes (|b|≤20°) and selecting the early type stars which apparently displayed the most significant excess of X-ray emission over the `normal' stellar level. The present search is restricted to stars earlier than B6 and X-ray luminosities ≥1031erg/cm2/s. Follow-up optical and X-ray observations allowed to remove misidentified OB stars and spurious matches with interloper X-ray emitters (mostly active coronae) leaving five very likely new massive X-ray binaries: the O7 star LS 5039 and the Be stars BSD 24- 491, LS 992, LS 1698 and LS I +61 235. This latter source was already mentioned in an earlier paper. LS 1698 is the probable optical counterpart of the hard X-ray transient 4U 1036-56. These new candidates have 0.1-2.4keV un-absorbed luminosities ≥2x1033erg/cm2/s indicating an accreting neutron star or black hole. On the average their soft X-ray luminosities are comparable to those observed from hard X-ray transients in quiescence or from persistent low luminosity Be/X-ray sources. The four Be stars have Balmer emission slightly less intense than previously known systems showing strong outbursts. This suggests that the relative weakness of the circumstellar envelope may explain the low luminosities to some extent. Two additional X-ray binary candidates, HD 161103 and SAO 49725 require further confirmation of their X-ray excess. Their lower soft X-ray luminosities (1-5x1032erg/cm2/s) could qualify them as Be + accreting white dwarf systems. Four other B stars in the Orion and Canis Major OB associations, HD 38087, HD 38023, HD 36262 and HD 53339 exhibit X-ray flux excesses in the range 2-7x1031erg/cm2/s whose origin is unclear. Finally very soft X-ray emission was detected from HR 2875 suggesting the presence of a non-accreting white dwarf companion to the B5 star.

Abstract Copyright:

Journal keyword(s): X-ray: stars - stars: early-type - stars: emission-line, Be, neutron stars, white dwarfs

Simbad objects: 78

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Number of rows : 78
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* V662 Cas HXB 01 18 02.6976641952 +65 17 29.829200388 12.27 11.99 11.14 10.33 9.58 B1Iae 245 0
2 V* V909 Cas bC* 01 36 38.5546114968 +61 25 53.896585116 10.57 10.93 10.54     B1III 16 0
3 EM* GGA 104 HXB 01 47 00.2124077208 +61 21 23.663788056 11.76 12.09 11.366 11.00 10.52 B1IIIe 176 0
4 LS I +61 298 Y*O 02 34 32.4297049536 +61 47 15.138539124 11.24 11.61 11.01     O9.5-B0.5IV-V 16 0
5 LS I +61 303 HXB 02 40 31.6644419688 +61 13 45.593918580 11.27 11.61 10.75 10.19 9.55 B0Ve 800 2
6 HD 281159 Y*O 03 44 34.1873929 +32 09 46.137563 9.19 9.21 8.53 8.85 7.850 B5V 211 0
7 RX J0344.5+3208 X 03 44 34.3 +32 08 51           ~ 3 0
8 EM* LkHA 95 Or* 03 44 37.8759632496 +32 08 04.185597552   19.05 17.14 15.72 14.049 K7 51 0
9 EM* LkHA 329 TT* 03 45 36.8520630960 +32 25 56.857598832     14.9     K5.0 18 0
10 RX J0345.6+3226 X 03 45 37.3 +32 26 42           ~ 1 0
11 HD 281157 * 03 45 39.1600557240 +32 26 24.160284672   9.83 9.14 9.17   B5 26 0
12 V* X Per HXB 03 55 23.0777456088 +31 02 45.039836148 6.090 6.840 6.720     O9.5III 934 0
13 LS V +44 17 HXB 04 40 59.3296237272 +44 31 49.258049376 11.02 11.42 10.73 10.28 9.76 B0.2Ve 105 0
14 V* HP Aur EB* 05 10 21.7819906416 +35 47 46.620438936   11.85 11.17     G0 88 2
15 RX J0510.3+3547 X 05 10 21.8 +35 47 55           ~ 2 0
16 HD 36262 * 05 31 01.5715376568 +12 05 48.367037616   7.52 7.63     B3V 32 0
17 HD 37131 Y*O 05 35 59.2216280064 -06 16 30.077481720 7.86 8.30 8.32     B7/8V 33 0
18 V* V1178 Ori Or* 05 35 59.7518657712 -06 16 06.685482828     13.426   11.788 K7 35 0
19 HD 245770 HXB 05 38 54.5748918624 +26 18 56.836952784 9.30 9.84 9.39 8.77 8.30 O9/B0III/Ve 920 0
20 HD 38023 Y*O 05 42 21.3019719792 -08 08 00.178794456   9.18 8.87     B5III 46 1
21 HD 38087 ** 05 43 00.5754723576 -02 18 45.389406240 7.96 8.40 8.29 8.06 7.89 B3II 157 1
22 LS V +29 14 * 05 53 04.4487508968 +29 39 41.639755896   11.29 11.01     B 6 0
23 HD 53339 Y*O 07 04 15.8826037346 -11 24 05.691819183   9.55 9.41 10.56 9.30 B3V 22 0
24 HD 59364 * 07 28 36.5280715200 -26 29 06.274238352   8.95 9.06     B5V 17 0
25 V* V441 Pup HXB 07 28 53.5788273168 -26 06 28.897118208 11.27 12.29 11.83 11.53   O5Ve 74 0
26 * y Pup XB* 07 29 05.6951953008 -38 48 43.442359164   5.243 5.395     B3V 78 0
27 HD 67785 * 08 07 13.4112729360 -50 53 39.731788068   10.14 9.74     B2II 8 0
28 V* V572 Pup HXB 08 12 28.3575205680 -31 14 52.138451400 12.14 13.03 12.74 12.44   B0.2IVe 63 0
29 V* GP Vel HXB 09 02 06.8608812864 -40 33 16.899168060 6.85 7.37 6.87 6.31 6.05 B0.5Ia 1422 0
30 HD 90074 PM* 10 22 10.4207538048 -58 15 56.049824700   7.23 6.35     G6III 14 0
31 RX J1022.2-5816 X 10 22 11.8 -58 16 07           ~ 1 0
32 HD 302780 Em* 10 22 18.6371540352 -58 16 38.853093900   9.74 9.58     B9 12 0
33 LS 1698 HXB 10 37 35.3145142200 -56 47 55.869594756   12.00 11.48 11.38   B0III/V:e 98 0
34 CPD-59 2854 s*b 10 55 55.3806894360 -60 14 20.206985676 10.42 10.84 10.47 10.52   B3Iab 26 0
35 WRAY 15-793 HXB 11 20 57.1736884968 -61 55 00.166078020 12.81 13.06 12.12     O9.5III/Ve 182 0
36 V* V779 Cen HXB 11 21 15.0920532528 -60 37 25.630264596   14.4 12.27     O9III/Veq 1024 0
37 1E 1145.1-6141 HXB 11 47 28.5598257552 -61 57 13.426997544   13.08       B2Iae 129 0
38 RX J1158.3-5759 X 11 58 21.3 -57 59 20           ~ 1 0
39 HD 103996 * 11 58 22.2523769328 -57 59 15.524173248   9.02 9.03     B3/5V 8 0
40 HD 104010 PM* 11 58 27.5952127320 -57 59 33.150065208   10.45 9.58     K0 13 0
41 TYC 8995-1548-1 * 13 35 26.7436335792 -62 11 13.967685600 12.55 12.80 11.95 11.68   OB+pec 12 0
42 RX J1520.2-3822 X 15 20 12.2 -38 21 59           ~ 3 0
43 UCAC3 104-176842 Y*? 15 20 12.5391811872 -38 21 58.051893888       10.70   K2V(e) 4 0
44 TYC 7835-2210-1 Y*? 15 20 13.2418476792 -38 21 58.281014700   12.71 11.52     K5Ve 4 0
45 CPD-37 6455 * 15 20 13.7114130792 -38 22 13.937065104   11.40 10.18     ~ 1 0
46 HD 136125 * 15 20 14.1177113064 -38 22 43.383159804   9.60 9.60     B9V 4 0
47 HD 140285B * 15 44 22.5531699696 -41 49 05.237029164   8.16 7.91     ~ 3 0
48 HD 140285A * 15 44 22.6740748920 -41 49 08.715688680   6.06 6.11     ~ 10 0
49 HD 140285 ** 15 44 22.67415 -41 49 08.7181   5.93 5.93     A0V+B 28 0
50 WRAY 15-1400 TT* 15 59 16.4717314824 -41 57 10.300018176   13.5 12.0     K7IVe 78 0
51 * 12 Sco ** 16 12 16.03911 -28 25 02.3122           B9V 71 0
52 * 12 Sco B * 16 12 16.2999999552 -28 25 01.027179156           F3V 3 0
53 HD 153919 HXB 17 03 56.7725629224 -37 50 38.913331452 6.06 6.78 6.51 6.08 5.90 O6Iafcp 781 1
54 NGC 6396 19 * 17 37 31.4207995272 -35 02 06.039413484 12.31 12.32 11.40 11.17   OB 11 0
55 HD 161103 Be* 17 44 45.7656635952 -27 13 44.478959340 8.44 9.23 9.13 9.12   B0.5III/IVe 76 0
56 HD 165424 * 18 06 55.7702900880 -26 06 31.516557228   9.01 8.98     B3/5II 9 0
57 SNR G011.2-00.3 SNR 18 11 28.9 -19 25 29           ~ 270 1
58 LS 4738 * 18 11 29.2028391816 -19 25 39.684890748   13.1 12.90 12.65   OB 5 0
59 RX J1811.5-1925 X 18 11 30.8 -19 25 36           ~ 2 0
60 LS IV -13 45 * 18 26 08.3897800896 -13 21 52.244592444 11.64 11.74 11.03 11.33   OB- 7 0
61 V* V479 Sct HXB 18 26 15.0561548880 -14 50 54.247274304 12.02 12.23 11.27 11.04   ON6V((f))z 530 2
62 HD 313343 * 18 28 34.6356078144 -18 22 17.541775236 9.72 10.30 9.74 9.96   B0 9 0
63 LS IV -12 70 * 18 30 46.0254864984 -12 31 33.543120576   12.16 11.51     B 6 0
64 LS IV -05 35 * 19 00 45.7348273488 -05 04 20.398512216   11.58 11.23     B 6 0
65 4U 1907+09 HXB 19 09 37.1382681824 +09 49 55.279554289   19.41 16.35 14.40 12.53 O8.5Iab 321 1
66 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4090 0
67 BD+47 3129 HXB 20 30 30.8452150680 +47 51 50.717123784 8.95 9.594 9.273 9.273   B0.5III/IVe 35 0
68 V* V2246 Cyg HXB 20 32 15.2749858128 +37 38 14.843024844   22.16 19.41 17.32 15.18 B0Ve 397 0
69 LS III +46 11 s*b 20 35 12.6369328512 +46 51 12.108461292 12.46 12.295 10.926 10.005   O3.5If*+O3.5If* 30 0
70 V* PW Cep Or* 21 01 36.0644460360 +68 08 22.501066560   17.00 15.95 15.04 13.93 ~ 13 0
71 HD 200775 Ae* 21 01 36.9205762896 +68 09 47.789578836 7.34 7.754 7.427 8.13   B2Ve 531 0
72 RX J2101.6+6809 X 21 01 39.7 +68 09 36           ~ 2 0
73 GSC 04267-01568 * 22 10 55.2738620616 +63 23 53.274315408   12.23 11.91 11.92   ~ 2 0
74 V* V447 Cep bC* 22 10 59.55689 +63 23 58.4970 6.88   8.58 8.39   B5 26 0
75 LS III +58 47 Em* 22 39 20.7462863160 +59 08 04.748784000   12.47 11.85     B 8 0
76 HD 221237 ** 23 29 52.2802 +58 32 54.458       8.15   B9V 22 0
77 RX J2329.8+5833 X 23 29 58.8 +58 33 48           ~ 2 0
78 UCAC4 743-089698 * 23 30 00.1109736816 +58 34 01.502123448       11.03   B3 4 0

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2022.05.19-23:11:41

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