Swift-XRT Survey of Fermi Unassociated Sources

These results are part of the Swift program to follow-up Fermi unassociated sources in an attempt to find X-ray counterparts to the unidentified gamma-ray sources. As new observations are performed, these pages will be updated in nearly real time. Please use these results as a guide and proceed with caution when using them in a publication since they are the result of an automated analysis.

When using these data and results in publications, please reference M.C. Stroh & A.D. Falcone 2013, ApJS, 207, 28; arXiv: 1305.4949 for a description of many of the analysis techniques used to reduce these data (note: a more detailed paper describing the complete data set and analysis is forthcoming). Please contact Abe Falcone and Michael Stroh at unassociated@swift.psu.edu if you have any questions about the program or the analysis, or to simply to let us know that you've made use of these data.
Caution: For completeness, sources are listed if the "detection" exceeds 3 sigma. The significances and images are shown so you can make more stringent significance cuts, if desired.

1FGL J2039.4-5621

Field

Detected Excesses
Swift-XRT image of the field for 1FGL J2039.4-5621 Swift-XRT detections in the field for 1FGL J2039.4-5621

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 20 39 57.48 -56 07 42.23 3.67 (5.7 ± 0.3) x 10-3 420 19.460 18.590
2 20 40 02.84 -56 27 42.52 3.70 (4.3 ± 0.3) x 10-3 328 15.000 15.280
3 20 39 34.59 -56 17 08.15 3.80 (2.4 ± 0.2) x 10-3 207 10.290 10.800
4 20 39 21.93 -56 19 49.68 3.81 (1.3 ± 0.2) x 10-3 180 7.546 7.374
5 20 39 48.39 -56 10 26.10 3.92 (8.9 ± 1.4) x 10-4 87 6.283 6.368
6 20 40 31.85 -56 19 58.86 3.91 (8.3 ± 1.4) x 10-4 102 6.337 6.123
7 20 39 04.59 -56 12 23.13 3.91 (8.1 ± 1.4) x 10-4 96 6.227 5.960
8 20 39 15.61 -56 17 19.80 3.86 (7.9 ± 1.4) x 10-4 146 5.588 5.611
9 20 39 26.36 -56 24 06.14 3.88 (7.2 ± 1.4) x 10-4 140 4.994 5.296
10 20 40 09.40 -56 21 45.14 4.00 (6.6 ± 1.2) x 10-4 95 5.012 5.283
11 20 40 27.95 -56 22 03.37 3.97 (6.6 ± 1.3) x 10-4 95 5.215 5.192
12 20 39 11.83 -56 11 47.41 3.91 (6.6 ± 1.3) x 10-4 86 5.433 5.034
13 20 40 45.06 -56 14 41.51 4.01 (5.0 ± 1.1) x 10-4 66 5.334 4.558
14 20 40 26.64 -56 08 16.54 4.22 (4.2 ± 1.0) x 10-4 48 4.346 4.352
15 20 39 45.46 -56 09 27.26 3.93 (4.8 ± 1.1) x 10-4 68 4.247 4.344
16 20 39 51.83 -56 17 47.70 3.91 (5.3 ± 1.2) x 10-4 106 4.270 4.289
17 20 38 26.54 -56 14 43.72 3.72 (6.0 ± 1.4) x 10-4 178 6.844 4.223
18 20 38 22.02 -56 16 54.87 3.96 (3.9 ± 1.0) x 10-4 77 3.914 3.698
19 20 39 51.61 -56 12 09.90 3.96 (3.3 ± 1.0) x 10-4 94 3.372 3.204
20 20 40 51.28 -56 21 25.21 3.99 (3.2 ± 1.0) x 10-4 67 3.440 3.198

Rejected Excesses (Due to Overlaps or SNR(Sosta) < 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 20 39 24.92 -56 19 53.63 3.80 (8 ± 2) x 10-4 227 5.645 5.371
2 20 39 15.74 -56 17 19.67 3.86 (5.7 ± 1.3) x 10-4 150 4.581 4.392
3 20 39 21.72 -56 19 39.75 3.81 (5.4 ± 1.4) x 10-4 171 4.657 3.797
4 20 39 27.30 -56 23 49.16 3.87 (4.0 ± 1.2) x 10-4 165 3.397 3.215
5 20 38 42.30 -56 21 43.73 3.85 (3.2 ± 1.1) x 10-4 111 4.044 2.904
6 20 40 48.55 -56 15 34.68 3.99 (2.7 ± 0.9) x 10-4 49 3.095 2.850
7 20 38 56.76 -56 27 02.67 3.83 (3.1 ± 1.1) x 10-4 102 3.280 2.744
8 20 39 44.31 -56 28 25.00 3.85 (2.9 ± 1.1) x 10-4 105 3.495 2.741
9 20 39 08.98 -56 07 50.21 4.02 (2.4 ± 0.9) x 10-4 45 3.185 2.718
10 20 39 34.16 -56 28 51.71 3.85 (3.0 ± 1.1) x 10-4 106 3.275 2.712
11 20 40 46.76 -56 25 42.32 4.19 (2.4 ± 1.0) x 10-4 34 3.252 2.523
12 20 40 57.57 -56 21 55.95 4.07 (2.2 ± 0.9) x 10-4 42 2.764 2.491
13 20 38 48.81 -56 25 06.70 3.84 (3.1 ± 1.3) x 10-4 103 3.089 2.476
14 20 38 57.36 -56 27 04.41 3.83 (2.6 ± 1.1) x 10-4 102 3.280 2.450
15 20 39 22.81 -56 28 35.90 3.84 (2.6 ± 1.1) x 10-4 120 3.357 2.440
16 20 39 21.70 -56 28 30.55 3.83 (2.6 ± 1.1) x 10-4 126 3.010 2.406
17 20 39 20.39 -56 28 22.71 3.84 (2.5 ± 1.1) x 10-4 119 3.116 2.384
18 20 38 26.31 -56 14 49.80 3.72 (2.9 ± 1.2) x 10-4 179 5.130 2.362
19 20 39 33.46 -56 28 49.82 3.84 (2.4 ± 1.0) x 10-4 114 2.958 2.351
20 20 39 40.64 -56 28 10.80 3.84 (2.4 ± 1.0) x 10-4 112 2.861 2.322
21 20 38 31.14 -56 22 28.41 3.89 (2.2 ± 1.0) x 10-4 90 3.234 2.304
22 20 38 26.55 -56 14 43.55 3.72 (2.9 ± 1.2) x 10-4 171 6.538 2.293
23 20 39 44.31 -56 28 25.00 3.85 (2.8 ± 1.2) x 10-4 105 3.137 2.266
24 20 38 54.32 -56 26 22.20 3.80 (2.3 ± 1.0) x 10-4 118 2.897 2.250
25 20 38 55.14 -56 26 05.47 3.79 (2.7 ± 1.2) x 10-4 120 3.517 2.228
26 20 38 56.54 -56 27 03.34 3.83 (2.6 ± 1.2) x 10-4 98 2.981 2.168
27 20 38 26.38 -56 14 47.47 3.72 (2.5 ± 1.2) x 10-4 176 2.871 2.164
28 20 39 11.26 -56 27 42.89 3.83 (2.1 ± 1.1) x 10-4 125 2.965 1.883
29 20 39 33.59 -56 28 47.20 3.84 (2.0 ± 1.1) x 10-4 117 3.548 1.852
30 20 38 26.51 -56 14 40.97 3.72 (1.9 ± 1.1) x 10-4 170 2.919 1.699
31 20 39 41.73 -56 29 26.54 3.91 (1.7 ± 1.0) x 10-4 74 3.269 1.692
32 20 39 03.11 -56 27 10.05 3.83 (1.8 ± 1.1) x 10-4 112 3.115 1.648
33 20 39 01.50 -56 26 44.07 3.79 (1.6 ± 1.1) x 10-4 117 3.105 1.543
34 20 38 41.72 -56 23 53.17 3.83 (1.1 ± 0.9) x 10-4 107 3.008 1.160
35 20 38 26.56 -56 14 41.53 3.72 (1.2 ± 1.0) x 10-4 177 3.032 1.153
36 20 38 26.54 -56 14 43.63 3.72 (1.1 ± 1.0) x 10-4 171 2.988 1.109
37 20 38 26.56 -56 14 43.54 3.72 (7 ± 14) x 10-5 178 4.090 0.509

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 1FGL J2039.4-5621 Swift-XRT image with known radio, optical and UV sources for 1FGL J2039.4-5621

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 3XMM J203929.7-562021 20 39 29.76 -56 20 21.12 0.86 XMM-NEWTON
2 3XMM J203922.1-562114 20 39 22.13 -56 21 14.76 1.01 XMM-NEWTON
3XMM J203929.1-561955 20 39 29.14 -56 19 55.56 1.29 XMM-NEWTON
3 3XMM J203939.8-562131 20 39 39.86 -56 21 31.68 1.48 XMM-NEWTON
4 3XMM J203922.4-561946 20 39 22.49 -56 19 46.56 1.73 XMM-NEWTON
5 3XMM J203915.9-562105 20 39 15.96 -56 21 05.04 1.87 XMM-NEWTON
6 3XMM J203931.5-562316 20 39 31.58 -56 23 16.08 2.08 XMM-NEWTON
7 3XMM J203922.1-561855 20 39 22.10 -56 18 55.44 2.51 XMM-NEWTON
8 3XMM J203926.3-562412 20 39 26.40 -56 24 12.60 3.02 XMM-NEWTON
9 3XMM J203905.4-562040 20 39 05.50 -56 20 40.56 3.36 XMM-NEWTON
10 3XMM J203914.5-562355 20 39 14.50 -56 23 55.68 3.41 XMM-NEWTON
11 3XMM J203948.8-561902 20 39 48.89 -56 19 02.64 3.47 XMM-NEWTON
12 3XMM J203946.8-561835 20 39 46.90 -56 18 36.00 3.57 XMM-NEWTON
13 3XMM J203916.2-561741 20 39 16.27 -56 17 41.28 3.97 XMM-NEWTON
14 3XMM J203957.6-562029 20 39 57.70 -56 20 29.04 3.99 XMM-NEWTON
15 1RXS J203900.1-562138 20 39 00.10 -56 21 38.16 4.08 ROSAT
16 3XMM J203910.5-562421 20 39 10.51 -56 24 21.96 4.09 XMM-NEWTON
17 3XMM J203944.0-562446 20 39 44.21 -56 24 46.44 4.09 XMM-NEWTON
18 3XMM J203935.0-561710 20 39 34.99 -56 17 09.96 4.12 XMM-NEWTON
3XMM J203959.9-562009 20 39 59.95 -56 20 09.60 4.36 XMM-NEWTON
19 3XMM J203950.9-561756 20 39 50.90 -56 17 56.04 4.43 XMM-NEWTON
2RXS J203856.8-562130 20 38 56.83 -56 21 30.60 4.52 ROSAT
2RXS J203856.8-562130 20 38 56.83 -56 21 30.60 4.52 ROSAT
20 3XMM J203906.0-561759 20 39 06.70 -56 17 59.28 4.57 XMM-NEWTON
21 3XMM J203916.0-561701 20 39 16.49 -56 17 01.32 4.59 XMM-NEWTON
22 3XMM J203958.6-561834 20 39 58.63 -56 18 34.92 4.83 XMM-NEWTON
23 3XMM J203944.3-561635 20 39 44.40 -56 16 35.76 5.07 XMM-NEWTON
24 3XMM J204000.4-561806 20 40 00.46 -56 18 06.48 5.31 XMM-NEWTON
25 3XMM J203921.8-562631 20 39 21.84 -56 26 31.92 5.42 XMM-NEWTON
26 3XMM J204008.9-562144 20 40 08.98 -56 21 44.64 5.51 XMM-NEWTON
27 3XMM J203927.6-561542 20 39 27.62 -56 15 42.48 5.51 XMM-NEWTON
28 3XMM J203900.1-561722 20 39 00.14 -56 17 22.92 5.58 XMM-NEWTON
29 3XMM J204010.4-561937 20 40 10.44 -56 19 37.56 5.90 XMM-NEWTON
30 3XMM J203913.8-561531 20 39 13.90 -56 15 31.32 6.09 XMM-NEWTON
31 3XMM J203922.1-562715 20 39 22.15 -56 27 15.84 6.13 XMM-NEWTON
32 3XMM J204011.5-561905 20 40 11.54 -56 19 05.88 6.21 XMM-NEWTON
33 3XMM J203902.2-562630 20 39 02.21 -56 26 30.48 6.49 XMM-NEWTON
34 3XMM J203842.0-562138 20 38 42.91 -56 21 38.88 6.57 XMM-NEWTON
35 3XMM J203843.3-561920 20 38 43.39 -56 19 20.64 6.65 XMM-NEWTON
36 3XMM J203935.5-562748 20 39 35.59 -56 27 48.60 6.65 XMM-NEWTON
37 3XMM J203848.6-561740 20 38 48.65 -56 17 40.92 6.66 XMM-NEWTON
38 3XMM J203951.6-561509 20 39 51.70 -56 15 09.72 6.80 XMM-NEWTON
39 3XMM J203918.8-561427 20 39 18.84 -56 14 27.24 6.92 XMM-NEWTON
40 3XMM J203955.0-562723 20 39 55.10 -56 27 23.76 7.13 XMM-NEWTON
41 3XMM J204016.4-562422 20 40 16.42 -56 24 22.32 7.23 XMM-NEWTON
42 3XMM J203916.9-561354 20 39 16.99 -56 13 54.84 7.50 XMM-NEWTON
43 3XMM J203954.5-562759 20 39 54.58 -56 27 59.04 7.61 XMM-NEWTON
44 3XMM J203947.6-562824 20 39 47.59 -56 28 24.96 7.62 XMM-NEWTON
45 3XMM J204023.1-562253 20 40 23.11 -56 22 53.76 7.63 XMM-NEWTON
46 3XMM J203942.7-562845 20 39 42.77 -56 28 45.48 7.76 XMM-NEWTON
47 3XMM J203958.8-561426 20 39 58.87 -56 14 26.52 7.91 XMM-NEWTON
SWIFT J204002.5-562742 20 40 02.54 -56 27 42.84 7.95 SWIFT
48 3XMM J204002.8-562743 20 40 02.86 -56 27 43.92 7.99 XMM-NEWTON
49 3XMM J204016.5-561626 20 40 16.58 -56 16 27.12 8.09 XMM-NEWTON
50 3XMM J204015.8-562611 20 40 15.89 -56 26 11.76 8.14 XMM-NEWTON
51 3XMM J203905.5-562843 20 39 05.57 -56 28 43.32 8.20 XMM-NEWTON
52 3XMM J203933.8-562924 20 39 33.86 -56 29 24.72 8.22 XMM-NEWTON
53 3XMM J204028.3-562208 20 40 28.39 -56 22 08.76 8.22 XMM-NEWTON
54 3XMM J203828.8-562225 20 38 28.85 -56 22 24.96 8.47 XMM-NEWTON
55 3XMM J203939.2-562937 20 39 39.24 -56 29 36.96 8.51 XMM-NEWTON
56 3XMM J204031.0-562036 20 40 31.80 -56 20 36.96 8.57 XMM-NEWTON
57 3XMM J203827.7-562020 20 38 27.72 -56 20 20.76 8.59 XMM-NEWTON
58 3XMM J203940.0-561236 20 39 40.20 -56 12 36.72 8.73 XMM-NEWTON
59 3XMM J204031.9-561956 20 40 31.94 -56 19 56.28 8.76 XMM-NEWTON
60 3XMM J203900.8-562926 20 39 00.86 -56 29 26.88 9.13 XMM-NEWTON
61 3XMM J203831.8-561644 20 38 31.82 -56 16 44.76 9.15 XMM-NEWTON
62 3XMM J203948.4-561220 20 39 48.43 -56 12 20.88 9.26 XMM-NEWTON
63 3XMM J203931.2-563030 20 39 31.25 -56 30 30.96 9.30 XMM-NEWTON
64 3XMM J203953.4-563006 20 39 53.47 -56 30 06.12 9.49 XMM-NEWTON
65 3XMM J204036.9-562253 20 40 37.01 -56 22 53.76 9.51 XMM-NEWTON
66 3XMM J203904.1-561221 20 39 04.18 -56 12 21.24 9.53 XMM-NEWTON
67 3XMM J204017.4-561424 20 40 17.47 -56 14 24.00 9.54 XMM-NEWTON
68 3XMM J204036.6-562337 20 40 36.67 -56 23 37.32 9.62 XMM-NEWTON
69 3XMM J203924.7-561131 20 39 24.74 -56 11 31.92 9.71 XMM-NEWTON
70 3XMM J203912.5-561147 20 39 12.50 -56 11 47.76 9.71 XMM-NEWTON
71 3XMM J203951.1-561148 20 39 51.19 -56 11 48.12 9.89 XMM-NEWTON
72 3XMM J203828.4-562635 20 38 28.44 -56 26 35.88 10.00 XMM-NEWTON
73 3XMM J203817.0-562231 20 38 17.90 -56 22 31.44 10.10 XMM-NEWTON
74 3XMM J204038.3-561753 20 40 38.35 -56 17 53.16 10.12 XMM-NEWTON
75 3XMM J203955.9-563046 20 39 55.90 -56 30 46.44 10.24 XMM-NEWTON
76 3XMM J204034.2-561616 20 40 34.25 -56 16 15.96 10.26 XMM-NEWTON
77 3XMM J203822.0-561653 20 38 22.10 -56 16 53.04 10.30 XMM-NEWTON
78 3XMM J203921.6-563134 20 39 21.65 -56 31 33.96 10.41 XMM-NEWTON
79 3XMM J204024.9-562814 20 40 25.01 -56 28 14.52 10.41 XMM-NEWTON
80 3XMM J203840.1-561316 20 38 40.13 -56 13 16.68 10.48 XMM-NEWTON
81 3XMM J203819.7-562523 20 38 19.75 -56 25 23.16 10.50 XMM-NEWTON
82 3XMM J203957.5-561112 20 39 57.50 -56 11 12.84 10.74 XMM-NEWTON
83 3XMM J203827.3-561444 20 38 27.31 -56 14 44.88 10.77 XMM-NEWTON
84 3XMM J204010.6-563040 20 40 10.63 -56 30 39.96 11.04 XMM-NEWTON
85 3XMM J204039.4-562635 20 40 39.50 -56 26 35.16 11.09 XMM-NEWTON
86 3XMM J203948.4-561026 20 39 48.41 -56 10 26.40 11.09 XMM-NEWTON
87 3XMM J204024.5-561307 20 40 24.55 -56 13 06.96 11.14 XMM-NEWTON
88 3XMM J203849.9-563058 20 38 49.92 -56 30 57.96 11.18 XMM-NEWTON
89 3XMM J203828.9-561346 20 38 28.97 -56 13 46.20 11.21 XMM-NEWTON
90 3XMM J204050.9-562135 20 40 50.90 -56 21 35.28 11.29 XMM-NEWTON
91 3XMM J204018.7-561212 20 40 18.77 -56 12 12.96 11.31 XMM-NEWTON
92 3XMM J204049.8-562335 20 40 49.87 -56 23 35.52 11.39 XMM-NEWTON
93 3XMM J203837.0-563001 20 38 37.20 -56 30 01.08 11.40 XMM-NEWTON
94 3XMM J204050.9-562252 20 40 50.93 -56 22 52.68 11.41 XMM-NEWTON
95 3XMM J203955.2-561011 20 39 55.27 -56 10 11.64 11.59 XMM-NEWTON
96 3XMM J204046.5-562545 20 40 46.58 -56 25 45.12 11.60 XMM-NEWTON
97 3XMM J204053.2-562054 20 40 53.26 -56 20 54.24 11.62 XMM-NEWTON
98 3XMM J204044.8-562622 20 40 44.88 -56 26 22.56 11.65 XMM-NEWTON
99 3XMM J204045.6-561604 20 40 45.67 -56 16 04.08 11.76 XMM-NEWTON
100 3XMM J203921.6-563257 20 39 21.65 -56 32 57.84 11.80 XMM-NEWTON
101 3XMM J204042.7-561506 20 40 42.72 -56 15 06.12 11.87 XMM-NEWTON
102 3XMM J203939.0-560923 20 39 39.10 -56 09 23.76 11.90 XMM-NEWTON
103 3XMM J204019.2-561131 20 40 19.30 -56 11 31.92 11.91 XMM-NEWTON
104 3XMM J203944.1-563259 20 39 44.16 -56 32 60.00 11.96 XMM-NEWTON
105 3XMM J203945.2-560925 20 39 45.24 -56 09 25.56 11.99 XMM-NEWTON
106 3XMM J204053.7-562406 20 40 53.74 -56 24 06.12 12.03 XMM-NEWTON
107 3XMM J203855.6-561007 20 38 55.63 -56 10 08.04 12.04 XMM-NEWTON
108 3XMM J203951.0-563253 20 39 51.60 -56 32 53.16 12.05 XMM-NEWTON
3XMM J204045.0-561446 20 40 45.19 -56 14 46.68 12.31 XMM-NEWTON
109 3XMM J204048.8-561530 20 40 48.89 -56 15 30.24 12.42 XMM-NEWTON
110 3XMM J204052.2-561542 20 40 52.27 -56 15 42.48 12.74 XMM-NEWTON
111 3XMM J204010.5-563246 20 40 10.56 -56 32 46.68 12.89 XMM-NEWTON
112 3XMM J204027.2-561102 20 40 27.29 -56 11 02.76 12.96 XMM-NEWTON
113 3XMM J204045.0-561328 20 40 45.10 -56 13 28.20 13.05 XMM-NEWTON
114 3XMM J204046.2-561259 20 40 46.27 -56 12 59.76 13.47 XMM-NEWTON
115 3XMM J204054.6-561401 20 40 54.62 -56 14 02.04 13.83 XMM-NEWTON
116 3XMM J204051.0-563033 20 40 51.60 -56 30 33.48 14.65 XMM-NEWTON

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 SUMSS J203946-561133 20 39 46.80 -56 11 33.00 9.96 SUMSS
2 SUMSS J203911-561058 20 39 11.40 -56 10 58.08 10.55 SUMSS
3 SUMSS J203825-561515 20 38 25.30 -56 15 15.84 10.70 SUMSS
4 SUMSS J204048-561956 20 40 48.50 -56 19 57.00 11.03 SUMSS
5 SUMSS J204050-562133 20 40 50.81 -56 21 33.84 11.28 SUMSS
GLEAM J204051-562127 20 40 51.00 -56 21 28.08 11.31 GLEAMEGCAT
6 SUMSS J203956-563218 20 39 56.90 -56 32 17.88 11.72 SUMSS
7 SUMSS J203857-560926 20 38 57.79 -56 09 25.92 12.57 SUMSS
8 SUMSS J203825-561059 20 38 25.61 -56 10 59.16 13.53 SUMSS
GLEAM J203824-561055 20 38 24.91 -56 10 55.92 13.64 GLEAMEGCAT
9 SPASS J203806-561108 20 38 07.01 -56 11 08.88 15.24 SPASS2P3GH

Penn State University Goddard Space Flight Center Swift