2019A&A...621A..53I

Query : 2019A&A...621A..53I

2019A&A...621A..53I - Astronomy and Astrophysics, volume 621A, 53-53 (2019/1-1)

Searching for the most powerful thermonuclear X-ray bursts with the Neil Gehrels Swift Observatory.

IN'T ZAND J.J.M., KRIES M.J.W., PALMER D.M. and DEGENAAR N.

Abstract (from CDS):

We searched for thermonuclear X-ray bursts from Galactic neutron stars in all event mode data of the Neil Gehrels Swift Observatory collected until March 31, 2018. In particular, we are interested in the intermediate-duration bursts (shell flashes fueled by thick helium piles) with the ill-understood phenomenon of strong flux fluctuations. Nine such bursts have been discussed in the literature to date. Swift is particularly suitable for finding additional examples. We find and list a total of 134 X-ray bursts; 44 are detected with BAT only, 41 with XRT only, and 49 with both. Twenty-eight bursts involve automatic slews. We find 12 intermediate-duration bursts, all detected in observations involving automatic slews. Five show remarkably long Eddington-limited phases in excess of 200 s. Five show fluctuations during the decay phase; four of which are first discussed in the present study. We discuss the general properties of the fluctuations, considering also 7 additional literature cases. In general two types of fluctuations are observed: fast ones, with a typical timescale of 1 s and up and downward fluctuations of up to 70%, and slow ones, with a typical timescale of 1 min and only downward fluctuations of up to 90%. The latter look like partial eclipses because the burst decay remains visible in the residual emission. We revisit the interpretation of this phenomenon in the context of the new data set and find that it has not changed fundamentally despite the expanded data set. It is thought to be due to a disturbance of the accretion disk by outflowing matter and photons, causing obscuration and reflection due to Thompson scattering in an orbiting highly ionized cloud or structure above or below the disk. We discuss in detail the most pronounced burster SAX J1712.6-3739. One of the bursts from this source is unusual in that it lasts longer than 5600s, but does not appear to be a superburst.

Abstract Copyright: © ESO 2019

Journal keyword(s): X-rays: binaries - X-rays: bursts - accretion - accretion disks - X-rays: individuals: SAX J1712.6-3739 - X-rays: individuals: 4U 1850-087 - X-rays: individuals: Swift J1734.5-3027

Simbad objects: 119

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Number of rows : 119
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 V* V1037 Cas LXB 00 29 03.06 +59 34 19.0           ~ 267 1
2 4U 0513-40 LXB 05 14 06.59 -40 02 37.0           ~ 166 1
3 M 1 SNR 05 34 30.9 +22 00 53           ~ 6193 1
4 V* V1055 Ori LXB 06 17 07.3565603963 +09 08 13.515857360   18.80 18.5     ~ 560 1
5 V* UY Vol LXB 07 48 33.71 -67 45 07.7 16.10 17.00 16.9 16.7 17.05 ~ 618 0
6 4U 0836-42 LXB 08 37 23.6 -42 54 02           ~ 67 0
7 4U 0919-54 LXB 09 20 26.4818170056 -55 12 24.512806404 20.40 21.30 21.0     ~ 164 0
8 1E 1145.1-6141 HXB 11 47 28.5598257552 -61 57 13.426997544   13.08       B2Iae 149 0
9 4U 1246-58 LXB 12 49 39.364 -59 05 14.68   19.24 18.99     ~ 96 0
10 V* GR Mus LXB 12 57 37.1833002949 -69 17 18.996899563   19.40 19.1     ~ 260 0
11 Fermi bn140818229 gB 13 18 15.08 +06 55 22.6           ~ 14 0
12 SAX J1324.5-6313 X 13 24 27 -63 13.4           ~ 19 0
13 4U 1323-62 LXB 13 26 37.0 -62 08 09           ~ 181 0
14 MAXI J1421-613 X 14 21 -61.3           ~ 20 0
15 V* V822 Cen LXB 14 58 21.9347842080 -31 40 07.515432768 11.95 12.85 12.8     K3-K7V 544 0
16 V* BR Cir HXB 15 20 40.8532547060 -57 10 00.206639033   21.4 21.4     ~ 781 1
17 V* QU TrA LXB 15 47 54.6 -62 34 06           ~ 156 0
18 V* UW CrB LXB 16 05 45.8746697208 +25 51 45.246497976     19.7     ~ 69 0
19 V* QX Nor LXB 16 12 43.0 -52 25 23           ~ 905 1
20 MAXI J1621-501 X 16 20 22.01 -50 01 11.6           ~ 18 0
21 V* V801 Ara LXB 16 40 55.5976953528 -53 45 04.948107156 17.50 18.20 17.5   17.07 ~ 869 1
22 MAXI J1647-227 XB* 16 48 12.32 -23 00 55.2           ~ 12 0
23 [KRL2007b] 214 LXB 17 00 58.46 -46 11 08.6           ~ 251 0
24 4U 1701-407 LXB 17 01 44.30 -40 51 29.9           ~ 42 0
25 MXB 1658-298 LXB 17 02 06.54 -29 56 44.1 18.35 18.75 18.3     ~ 361 0
26 X Ara X-1 LXB 17 06 15.314 -43 02 08.69           ~ 268 1
27 IGR J17062-6143 LXB 17 06 16.2820758768 -61 42 40.593758076           ~ 87 0
28 X Oph X-2 X 17 08 23 -22 48.2           ~ 28 1
29 4U 1705-32 LXB 17 08 54.40 -32 18 57.5           ~ 59 0
30 4U 1705-44 LXB 17 08 54.470 -44 06 07.35           ~ 389 0
31 RX J1709.5-2639 LXB 17 09 34 -26 39.9           ~ 122 0
32 [KRL2007b] 225 LXB 17 10 12.3 -28 07 54           ~ 88 0
33 4U 1708-40 LXB 17 12 23.83 -40 50 34.0           ~ 65 0
34 [KRL2007b] 228 LXB 17 12 35 -37 39.0     12.25     ~ 73 0
35 4U 1711-34 LXB 17 14 19.78 -34 02 47.3           ~ 45 0
36 RX J1718.4-4029 LXB 17 18 24.13 -40 29 30.4           ~ 43 0
37 1H 1715-321 LXB 17 18 47.40 -32 10 40.0           ~ 77 0
38 IGR J17191-2821 XB* 17 19 15 -28 17.9           ~ 49 0
39 INTREF 776 LXB 17 23 38.7 -37 39 42           ~ 29 0
40 [KRL2007b] 238 LXB 17 25 25.50 -32 57 17.5     14.50     ~ 47 0
41 4U 1722-30 LXB 17 27 33.25 -30 48 07.4     12.50     ~ 265 1
42 NAME Slow Burster LXB 17 31 57.73 -33 50 02.5     15.50     ~ 823 1
43 NAME Rapid Burster LXB 17 33 24.61 -33 23 19.8           ~ 414 2
44 KS 1731-260 LXB 17 34 13.46 -26 05 18.6       22.8 20.9 ~ 417 0
45 SWIFT J1734.5-3027 gam 17 34 24 -30 23.9           ~ 15 0
46 RX J1735.3-3540 LX? 17 35 23.0 -35 40 13           ~ 25 0
47 1RXS J173546.9-302859 LXB 17 35 46.88 -30 29 00.4           ~ 78 1
48 XTE J1737-376 HX? 17 37 59 -37 46.3           ~ 49 1
49 1ES 1735-26.9 LXB 17 38 17.12 -26 59 38.6           ~ 167 0
50 V* V926 Sco LXB 17 38 58.2384053021 -44 27 00.699118812 16.90 17.70 17.5     ~ 456 0
51 [KRL2007b] 258 LXB 17 39 53.95 -28 29 46.8           ~ 98 0
52 2E 1737.5-2817 LXB 17 40 42.84 -28 18 08.5           ~ 79 0
53 IGR J17445-2747 XB? 17 44 30.4173333552 -27 46 00.509377908           ~ 30 0
54 KS 1741-293 LXB 17 44 51.63 -29 20 42.8           ~ 102 0
55 CXOGC J174457.4-285021 X 17 44 57.34 -28 50 20.3           ~ 37 0
56 2XMM J174502.1-285450 LXB 17 45 02.33 -28 54 49.7           ~ 133 0
57 AX J1745.6-2901 LXB 17 45 35.6400 -29 01 33.888           ~ 172 1
58 1A 1742-289 X 17 45 37.1832 -29 01 04.656           ~ 92 1
59 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14415 0
60 2E 3943 LXB 17 46 05.20 -29 30 53.3           ~ 209 1
61 [KRL2007b] 275 LXB 17 47 02.60 -28 52 58.9     14.20     ~ 177 0
62 2XMM J174716.1-281047 LXB 17 47 16.17 -28 10 48.2           ~ 50 0
63 [KRL2007b] 277 LXB 17 47 18.06 -27 20 38.9           ~ 78 0
64 1RXS J174725.6-300241 LXB 17 47 25.4 -30 02 41           ~ 63 0
65 AX J1747.4-3000 LXB 17 47 25.90 -30 00 02.0           ~ 108 0
66 X Sgr X-1 LXB 17 47 56.0 -26 33 49           ~ 375 0
67 IGR J17480-2446 LXB 17 48 04.831 -24 46 48.87           ~ 180 0
68 NAME TER 5 X-1 LXB 17 48 05.225 -24 46 47.66           ~ 217 1
69 MAXI J1747-249 LXB 17 48 05.3 -24 46 37           ~ 43 0
70 [KRL2007b] 281 LXB 17 48 13.148 -36 07 57.02     20.9     ~ 102 0
71 [PLV2002] CX1 LXB 17 48 52.163 -20 21 32.40           ~ 195 1
72 2XMM J174931.6-280805 LXB 17 49 31.940 -28 08 05.80           ~ 98 0
73 IGR J17498-2921 LXB 17 49 55.35 -29 19 19.6           ~ 57 0
74 4U 1746-371 LXB 17 50 12.66 -37 03 08.2     8.43     ~ 195 1
75 SAX J1750.8-2900 LXB 17 50 24.42 -29 02 15.4           ~ 139 0
76 EXO 1747-214 LXB 17 50 24.52 -21 25 19.9           ~ 47 0
77 Granat 1747-312 LXB 17 50 46.862 -31 16 28.86           ~ 118 1
78 IGR J17511-3057 LXB 17 51 08.55 -30 57 41.7           ~ 99 1
79 SAX J1752.3-3138 LXB 17 52 24.00 -31 37 42.0           ~ 21 0
80 [OKM2018] SWIFT J1753.7-2382 LXB 17 53 31.896 -23 49 14.86           ~ 33 0
81 [KRL2007b] 294 LXB 17 54 14.60 -27 54 34.3           ~ 33 0
82 [KRL2007b] 297 LXB 17 59 45.7 -22 01 39           ~ 64 1
83 1RXS J180408.9-342058 LXB 18 04 08.9 -34 20 58           ~ 61 0
84 [OKM2018] SWIFT J1806.5-2223 LXB 18 06 34 -22 15.1           ~ 52 0
85 2S 1803-245 LXB 18 06 50.72 -24 35 28.6           ~ 76 0
86 V* V4580 Sgr LXB 18 08 27.54 -36 58 44.3   16.81 16.51     ~ 984 0
87 XTE J1810-189 LXB 18 10 20.86 -19 04 11.2           ~ 56 0
88 V* V4722 Sgr LXB 18 10 44.47 -26 09 01.2   21.5     18.449 ~ 91 0
89 XMMU J181227.8-181234 X 18 12 27.8 -18 12 34           ~ 15 0
90 V* V5511 Sgr LXB 18 13 39.03 -33 46 22.3   18.61 18.33 18.05   ~ 190 0
91 V* V5512 Sgr LXB 18 14 31.55 -17 09 26.7     12.73     K5III 392 0
92 4U 1812-12 LXB 18 15 06.15 -12 05 46.7           ~ 113 2
93 V* NP Ser LXB 18 16 01.389 -14 02 10.62   18.8       K 642 2
94 SWIFT J181723.1-164300 X 18 17 23.1 -16 43 00           ~ 6 0
95 SAX J1818.7+1424 X 18 18 44 +14 24.2           ~ 13 0
96 X Sgr X-4 LXB 18 23 40.57 -30 21 40.6   19.06 18.81     ~ 992 1
97 IGR J18245-2452 LXB 18 24 32.50 -24 52 07.8           ~ 224 0
98 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 770 0
99 4U 1823-00 LXB 18 25 22.02 -00 00 43.0   23.00 22     ~ 90 0
100 2XMM J182833.7-103700 LXB 18 28 33.7753501392 -10 37 03.710934228           ~ 35 0
101 V* V4634 Sgr LXB 18 29 28.2 -23 47 49 18.90 19.40 19     ~ 350 0
102 Cl* NGC 6652 SAW V10 LXB 18 35 43.649 -32 59 26.77     18.9     ~ 98 0
103 V* MM Ser LXB 18 39 57.56 +05 02 09.6   19.2 19.2     ~ 349 0
104 SWIFT J185003.2-005627 X 18 50 03.2 -00 56 27           ~ 20 0
105 NGC 6712 GlC 18 53 04.32 -08 42 21.5           ~ 519 0
106 4U 1850-086 LXB 18 53 04.89 -08 42 19.7 20.40 21.20 21.0     ~ 252 1
107 2MAXI J1900-248 LXB 19 00 08.65 -24 55 13.7     18.09     ~ 210 0
108 4U 1857+01 LXB 19 08 26.97 +00 10 07.7 20.50 21.00 20.5     ~ 129 0
109 X Aql X-1 LXB 19 11 16.0571313336 +00 35 05.868232692           ~ 1136 1
110 V* V1405 Aql LXB 19 18 47.871 -05 14 17.09 20.90 21.40 21.0     ~ 474 0
111 2MAXI J1922-171 LXB 19 22 37.0 -17 17 03           ~ 36 0
112 INTREF 989 LXB 19 42 38.00 -03 54 00.0           ~ 15 0
113 V* LZ Aqr LXB 21 23 14.54 -05 47 52.9 15.90 16.78 16.8     ~ 147 0
114 CXOU J212958.1+121002 XB* 21 29 58.06 +12 10 02.6     16.6     ~ 78 1
115 4U 2129+12 LXB 21 29 58.3124 +12 10 02.670 14.50 15.70 15.8     ~ 317 1
116 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3140 0
117 V* V1727 Cyg LXB 21 31 26.2133156448 +47 17 24.512055396 16.75 17.05 16.4     ~ 240 0
118 V* V1341 Cyg LXB 21 44 41.1544345272 +38 19 17.066570988 15.00 15.13 14.68 15.00   A9III 1155 1
119 SAX J2224.9+5421 X 22 24 52 +54 21.9           ~ 18 1

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