2007A&A...466..595K

Query : 2007A&A...466..595K

2007A&A...466..595K - Astronomy and Astrophysics, volume 466595-618 (2007/5-1)

The INTEGRAL Galactic bulge monitoring program: the first 1.5 years.

KUULKERS E., SHAW S.E., PAIZIS A., CHENEVEZ J., BRANDT S., COURVOISIER T.J.-L., DOMINGO A., EBISAWA K., KRETSCHMAR P., MARKWARDT C.B., MOWLAVI N., OOSTERBROEK T., ORR A., RISQUEZ D., SANCHEZ-FERNANDEZ C. and WIJNANDS R.

Abstract (from CDS):

The Galactic bulge region is a rich host of variable high-energy point sources. Since 2005, February 17 we are monitoring the source activity in the Galactic bulge region regularly and frequently, i.e., about every three days, with the instruments onboard INTEGRAL. Thanks to the large field of view, the imaging capabilities and the sensitivity at hard X-rays, we are able to present for the first time a detailed homogeneous (hard) X-ray view of a sample of 76 sources in the Galactic bulge region. We describe the successful monitoring program and show the first results from the start of the monitoring up to 2006, April 21, i.e., for a period of about one and a half year, during three visibility seasons. We focus on the short (hour), medium (month) and long-term (year) variability in the hard X-ray bands, i.e., 20-60keV and 60-150keV. When available, we discuss the simultaneous observations in the soft X-ray, 3-10keV and 10-25keV, bands. Almost all the sources in the Galactic bulge region we detect in the 20-60keV and 60-150keV bands are variable. During the last two and a half weeks of the third visibility season most of the known persistent (hard) X-ray sources in the Galactic Center region were not detected. Of our sample of sources, per visibility season we detect 32/33 sources in the 20-60keV band and 8/9 sources in the 60-150keV band above a signal to noise of 7. On average, we find per visibility season one active bright (>100mCrab, 20-60keV) black-hole candidate X-ray transient and three active weaker (≲25mCrab, 20-60keV) neutron star X-ray transients. Most of the time a clear anti-correlation can be seen between the soft and hard X-ray emission in some of the X-ray bursters. Hard X-ray flares or outbursts in X-ray bursters, which have a duration of the order of weeks are accompanied by soft X-ray drops. On the other hand, hard X-ray drops can be accompanied by soft X-ray flares/outbursts. During the course of our program we found a number of new sources, IGRJ17354-3255, IGR17453-2853, IGRJ17454-2703, IGRJ17456-2901b, IGRJ17536-2339, and IGRJ17541-2252. We report here on some of the high-energy properties of these sources. The high-energy light curves of all the sources in the field of view, and the high-energy images of the region, are made available through the WWW, as soon as possible after the observations have been performed, at http://isdc.unige.ch/Science/BULGE/ .

Abstract Copyright: ∼

Journal keyword(s): accretion, accretion disks - binaries: close - binaries: general - stars: neutron - Galaxy: bulge - X-rays: binaries

CDS comments: Table 1: H1 732-322 is a probable misprint for H 1743-322. SLX 1744-229 is a probable misprint for SLX 1744-299.

Simbad objects: 107

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Number of rows : 107
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [OMK96] 17 PoC 04 15.5 +24 58           ~ 3 0
2 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
3 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5476 0
4 V* V1055 Ori LXB 06 17 07.3565603963 +09 08 13.515857360   18.80 18.5     ~ 594 1
5 V* V818 Sco LXB 16 19 55.0692669024 -15 38 25.017666540 11.60 12.40 11.1     Oev 1730 0
6 V* V1033 Sco HXB 16 54 00.1423963019 -39 50 44.761701340       16.14   F3-6IV 1980 0
7 2MASS J17004888-4139214 HXB 17 00 48.884 -41 39 21.46           Ofpe/WN9 272 0
8 HD 153919 HXB 17 03 56.7725629224 -37 50 38.913331452 6.06 6.78 6.51 6.08 5.90 O6Iafcp 851 0
9 V* V1101 Sco LXB 17 05 44.4916006152 -36 25 23.049324480   20.10 18.6     ~ 473 0
10 4U 1705-32 LXB 17 08 55.1 -32 18 49           ~ 66 0
11 IGR J17091-3624 LXB 17 09 07.61 -36 24 25.7           ~ 320 1
12 [KRL2007b] 224 HX? 17 09 46.124 -36 27 57.31   21.16       ~ 52 0
13 [KRL2007b] 225 LXB 17 10 12.8 -28 07 52           ~ 104 0
14 BAX 258.1082-23.3759 ClG 17 12 26.3 -23 21 38           ~ 303 0
15 1RXS J171227.5-232140 X 17 12 31 -23 21.2           ~ 5 0
16 V* V2400 Oph CV* 17 12 36.4233668016 -24 14 44.773987164     14.5     ~ 169 0
17 [KRL2007b] 228 LXB 17 12 37.0 -37 38 42     12.25     ~ 81 0
18 V* V1228 Sco LXB 17 19 58.990 -31 45 01.11           ~ 122 1
19 2MASS J17200591-3116596 HXB 17 20 05.91 -31 16 59.6           ~ 41 0
20 2MASS J17251139-3616575 HXB 17 25 11.392 -36 16 57.53     14.30     B0-1Ia 140 2
21 [KRL2007b] 238 LXB 17 25 25.9 -32 57 13     14.50     ~ 54 0
22 ESO 454-29 GlC 17 27 33.24 -30 48 07.8           ~ 278 0
23 4U 1722-30 LXB 17 27 33.25 -30 48 07.4     12.50     ~ 278 1
24 [KRL2007b] 241 LX? 17 28 38.97 -29 21 44.9           ~ 43 0
25 V* V2216 Oph LXB 17 31 44.17 -16 57 40.9 16.40 17.10 16.8     ~ 329 1
26 NAME Slow Burster LXB 17 31 58.0 -33 49 58     15.50     ~ 865 1
27 V* V2116 Oph Sy* 17 32 02.1532435416 -24 44 44.129169096   20.78 18.4     M6IIIe 719 1
28 [KRL2007b] 247 BH? 17 33 13 -24 09.4           ~ 17 0
29 NAME Rapid Burster LXB 17 33 24.0 -33 23 19           ~ 429 2
30 Liller 1 Cl* 17 33 24.50 -33 23 20.0           ~ 311 0
31 IGR J17354-3255 HXB 17 35 27.6058982616 -32 55 54.425912052           O9Iab 58 1
32 Granat 1734-292 Sy2 17 37 28.3811310912 -29 08 02.119558272           ~ 160 1
33 1ES 1735-26.9 LXB 17 38 17.6 -26 59 39           ~ 177 0
34 AX J1739.1-3020 HXB 17 39 11.5515537336 -30 20 37.787917704     14.40 13.91   O8.5Iab(f) 166 1
35 SRGA J173953.4-282943 LXB 17 39 53.4 -28 29 43           ~ 106 0
36 2RXP J174040.9-280852 HXB 17 40 41.2 -28 08 50           ~ 31 1
37 2E 1737.5-2817 LXB 17 40 42.84 -28 18 08.5           ~ 87 0
38 [KRL2007b] 262 gam 17 41 56.0 -28 01 55           ~ 17 0
39 SWIFT J1743.1-3620 HXB 17 43 01.3294550646 -36 22 22.218956366       16.8   OI 51 0
40 2E 3938 HXB 17 43 54.7 -29 44 44           ~ 693 1
41 SAX J1744.7-2916 X 17 44 42 -29 16.9           ~ 4 0
42 KS 1741-293 LXB 17 44 51.63 -29 20 42.8           ~ 106 0
43 2XMM J174502.1-285450 LXB 17 45 02.4 -28 54 41           ~ 139 0
44 NAME Sgr A Region reg 17 45 12 -28 48.3           ~ 955 0
45 IGR J17453-2853 gam 17 45.3 -28 53           ~ 5 0
46 IGR J17454-2703 gam 17 45 19 -27 02.3           ~ 1 0
47 CXOU J174535.5-290124 X 17 45 35.58 -29 01 24.1           ~ 20 0
48 AX J1745.6-2901 LXB 17 45 35.6400 -29 01 33.888           ~ 191 1
49 1A 1742-289 X 17 45 37.1832 -29 01 04.656           ~ 93 1
50 CXOGC J174538.0-290022 X 17 45 38.07 -29 00 22.3           ~ 23 0
51 [KRL2007b] 270 gam 17 45 38.5 -29 01 15           ~ 27 0
52 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
53 CXOGC J174540.0-290005 X 17 45 40.0 -29 00 05           ~ 24 1
54 CXOGC J174540.0-290031 LXB 17 45 40.03 -29 00 31.0           ~ 42 0
55 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4970 3
56 CXOGC J174541.0-290014 X 17 45 41.00 -29 00 14.4           ~ 9 0
57 2E 3943 LXB 17 46 05.3 -29 30 52           ~ 217 1
58 1RXS J174607.8-213333 X 17 46 07.8 -21 33 33   16.5   14.7   ~ 5 0
59 NAME XTE J17464-3213 LXB 17 46 15.59637 -32 14 00.8600           ~ 805 0
60 IGR J17460-3047 gam 17 46 19 -30 47.5           ~ 5 0
61 2E 3944 LXB 17 46 21.1 -28 43 39     12.50     ~ 126 0
62 [KRL2007b] 275 LXB 17 47 02.60 -28 52 58.9     14.20     ~ 182 0
63 AX J1747.4-3000 LXB 17 47 26.0 -30 00 02           ~ 119 0
64 1RXS J174725.6-300241 LXB 17 47 26.2 -30 02 45           ~ 69 0
65 CXOGCS J174742.4-282228 MoC 17 47 42.41 -28 22 28.1           ~ 49 1
66 X Sgr X-1 LXB 17 47 56.3 -26 33 47           ~ 402 0
67 AX J1748.0-2829 LXB 17 48 05.060 -28 28 25.80     13.60     ~ 189 0
68 [KRL2007b] 281 LXB 17 48 13.148 -36 07 57.02     20.9     ~ 115 0
69 NGC 6440 GlC 17 48 52.67 -20 21 34.5           ~ 592 0
70 4U 1745-203 LXB 17 48 53.40 -20 21 43.0           ~ 86 1
71 2MASS J17485512-3254521 Sy2 17 48 55.13 -32 54 52.1           ~ 61 0
72 AX J1749.1-2733 HXB 17 49 06.79 -27 32 32.4           B1-3V 55 0
73 AX J1749.2-2725 HXB 17 49 12.28 -27 25 37.4           B3V 39 0
74 RX J1749.8-3312 LXB 17 49 48.940 -33 12 11.60           ~ 64 0
75 4U 1746-371 LXB 17 50 12.66 -37 03 08.2     8.43     ~ 206 1
76 NGC 6441 GlC 17 50 13.06 -37 03 05.2           ~ 940 0
77 [KRL2007b] 289 gam 17 50 46 -28 56.9           ~ 20 0
78 Granat 1747-312 LXB 17 50 46.862 -31 16 28.86           ~ 135 0
79 Cl Terzan 6 GlC 17 50 47.02873 -31 16 29.6900           ~ 214 0
80 2MASS J17511362-2012145 Sy1 17 51 13.6203430728 -20 12 14.580679392           ~ 36 0
81 IGR J17536-2339 gam 17 53 30 -23 38.5           ~ 5 0
82 [OKM2018] SWIFT J1753.7-2382 LXB 17 53 31.896 -23 49 14.86           ~ 37 0
83 IGR J17541-2252 gam 17 54.1 -22 52           ~ 4 0
84 IGR J17544-2619 HXB 17 54 25.2722906112 -26 19 52.576928292   14.71 12.94 12.10 10.38 O9Ib 207 0
85 [KRL2007b] 297 LXB 17 59 45.7 -22 01 39           ~ 68 1
86 4U 1758-25 LXB 18 01 09.7308060816 -25 04 44.120221284     11.08     ~ 705 1
87 2CXO J180112.3-254436 HXB 18 01 12.4783119670 -25 44 35.694663099           AV 417 1
88 X Sgr X-3 LXB 18 01 32.6 -20 31 45           ~ 254 1
89 SAX J1802.7-2017 HXB 18 02 41.9407199832 -20 17 17.312648064   17.4 16.4     B1Ib 100 0
90 SAX J1805.5-2031 X 18 05 34 -20 30.8           ~ 15 0
91 [KRL2007b] 304 LXB 18 06 59.8 -29 24 30           ~ 228 0
92 PSR J1808-2024 Psr 18 08 39.32 -20 24 40.1           ~ 1316 2
93 V* V5512 Sgr LXB 18 14 31.3 -17 09 23     12.73     K5III 449 0
94 V* NP Ser LXB 18 16 01.7 -14 02 09   18.8       K 683 2
95 [KRL2007b] 312 LXB 18 17 43.537 -33 01 07.80           ~ 177 0
96 XTE J1818-245 LXB 18 18 24.430 -24 32 17.96           ~ 43 0
97 SAX J1818.6-1703 HXB 18 18 37.8984077808 -17 02 47.967846180           B0Iab 112 0
98 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 939 1
99 X Sgr X-4 LXB 18 23 40.57 -30 21 40.6   19.06 18.81     ~ 1056 1
100 V* V691 CrA LXB 18 25 46.8185061768 -37 06 18.529336656 14.30 15.20 15.1     ~ 461 0
101 V* V4634 Sgr LXB 18 29 28.8 -23 47 48 18.90 19.40 19     ~ 399 0
102 QSO B1830-211 Bla 18 33 39.9399138048 -21 03 39.368838780     18.70 21   ~ 724 1
103 Cl* NGC 6652 SAW V10 LXB 18 35 43.9 -32 59 18     18.9     ~ 104 0
104 NGC 6652 GlC 18 35 45.63 -32 59 26.6           ~ 474 0
105 V* V1223 Sgr CV* 18 55 02.3108012664 -31 09 49.584656268           ~ 347 0
106 X Aql X-1 LXB 19 11 16.0571313336 +00 35 05.868232692           ~ 1186 1
107 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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