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.

3FGL J0856.4+6429

Field

Detected Excesses
Swift-XRT image of the field for 3FGL J0856.4+6429 Swift-XRT detections in the field for 3FGL J0856.4+6429

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 08 55 12.61 +64 23 44.13 3.52 (2.15 ± 0.04) x 10-2 3859 60.880 56.590
2 08 55 40.09 +64 23 04.42 3.61 (1.96 ± 0.13) x 10-3 485 15.520 15.370
3 08 55 13.41 +64 17 47.48 3.62 (1.68 ± 0.12) x 10-3 376 15.280 14.370
4 08 55 50.05 +64 30 04.20 3.61 (1.60 ± 0.12) x 10-3 520 14.110 12.860
5 08 55 12.20 +64 28 45.74 3.62 (1.28 ± 0.11) x 10-3 389 13.180 11.710
6 08 54 00.02 +64 25 32.58 3.65 (8.4 ± 0.9) x 10-4 234 10.240 9.481
7 08 54 37.33 +64 21 18.59 3.65 (8.5 ± 0.9) x 10-4 255 9.736 9.441
8 08 55 24.95 +64 19 16.22 3.62 (9.1 ± 1.0) x 10-4 319 11.560 9.356
9 08 54 18.07 +64 25 11.20 3.66 (8.0 ± 0.9) x 10-4 225 10.010 9.114
10 08 56 15.26 +64 20 20.71 3.64 (8.2 ± 0.9) x 10-4 311 10.540 8.873
11 08 54 44.84 +64 29 11.62 3.63 (7.9 ± 0.9) x 10-4 287 9.912 8.691
12 08 56 11.34 +64 25 47.97 3.64 (8.4 ± 1.0) x 10-4 367 10.430 8.464
13 08 54 17.19 +64 27 27.05 3.67 (6.8 ± 0.8) x 10-4 232 8.606 8.434
14 08 54 52.50 +64 31 08.15 3.63 (7.0 ± 0.9) x 10-4 288 10.050 8.007
15 08 55 43.31 +64 21 19.33 3.64 (6.8 ± 0.9) x 10-4 318 9.237 7.918
16 08 55 47.68 +64 29 06.86 3.62 (8.0 ± 1.1) x 10-4 394 9.352 7.552
17 08 55 28.65 +64 24 47.52 3.64 (6.2 ± 0.9) x 10-4 277 8.138 6.772
18 08 55 41.60 +64 25 47.12 3.64 (5.5 ± 0.8) x 10-4 315 7.721 6.720
19 08 55 05.16 +64 20 23.62 3.65 (5.2 ± 0.8) x 10-4 200 7.451 6.480
20 08 54 02.82 +64 14 19.80 3.73 (4.6 ± 0.7) x 10-4 105 6.581 6.442
21 08 56 46.63 +64 29 56.47 3.77 (4.7 ± 0.8) x 10-4 228 6.056 6.307
22 08 55 41.29 +64 18 38.07 3.65 (4.7 ± 0.8) x 10-4 211 7.959 6.010
23 08 54 12.28 +64 18 38.89 3.68 (3.4 ± 0.7) x 10-4 145 5.645 5.298
24 08 55 27.15 +64 30 12.10 3.65 (3.9 ± 0.8) x 10-4 263 6.902 5.103
25 08 55 43.43 +64 32 15.53 3.67 (3.7 ± 0.8) x 10-4 221 5.791 4.967
26 08 53 53.00 +64 19 46.36 3.68 (3.0 ± 0.6) x 10-4 121 5.356 4.922
27 08 54 25.60 +64 29 32.82 3.67 (3.1 ± 0.7) x 10-4 171 4.898 4.833
28 08 53 43.03 +64 28 38.27 3.72 (2.8 ± 0.6) x 10-4 109 4.650 4.775
29 08 53 50.51 +64 15 48.13 3.75 (2.6 ± 0.5) x 10-4 80 4.540 4.744
30 08 53 53.78 +64 28 08.92 3.69 (2.9 ± 0.6) x 10-4 101 5.011 4.666
31 08 54 40.65 +64 26 00.87 3.64 (3.0 ± 0.7) x 10-4 199 5.574 4.446
32 08 53 33.43 +64 24 12.06 3.71 (2.5 ± 0.6) x 10-4 102 4.739 4.417
33 08 55 44.68 +64 15 00.27 3.69 (2.6 ± 0.6) x 10-4 143 6.098 4.413
34 08 56 32.00 +64 20 21.63 3.68 (2.8 ± 0.7) x 10-4 195 5.888 4.257
35 08 56 30.05 +64 17 02.46 3.69 (2.6 ± 0.6) x 10-4 168 5.916 4.252
36 08 55 24.69 +64 33 43.32 3.71 (2.6 ± 0.6) x 10-4 169 4.076 4.216
37 08 57 05.17 +64 19 06.10 3.85 (2.1 ± 0.5) x 10-4 105 3.591 4.180
38 08 56 08.00 +64 24 05.36 3.66 (2.8 ± 0.7) x 10-4 263 4.290 4.158
39 08 53 45.60 +64 23 56.84 3.69 (2.7 ± 0.7) x 10-4 121 4.918 4.049
40 08 56 03.01 +64 19 02.99 3.65 (2.6 ± 0.7) x 10-4 194 5.905 3.981
41 08 54 31.00 +64 26 28.08 3.65 (2.8 ± 0.7) x 10-4 168 5.410 3.905
42 08 54 27.95 +64 19 43.37 3.69 (2.2 ± 0.6) x 10-4 144 4.756 3.879
43 08 54 37.37 +64 30 07.18 3.64 (2.8 ± 0.7) x 10-4 173 4.898 3.802
44 08 55 48.30 +64 16 55.86 3.67 (2.6 ± 0.7) x 10-4 144 4.634 3.771
45 08 54 55.61 +64 21 27.64 3.66 (2.3 ± 0.6) x 10-4 193 4.942 3.741
46 08 55 23.83 +64 18 30.37 3.62 (2.8 ± 0.7) x 10-4 196 6.150 3.730
47 08 54 06.88 +64 19 45.33 3.68 (2.3 ± 0.6) x 10-4 122 3.668 3.692
48 08 55 25.29 +64 22 55.21 3.62 (3.0 ± 0.8) x 10-4 244 5.088 3.688
49 08 55 30.08 +64 28 11.43 3.65 (2.5 ± 0.7) x 10-4 281 4.990 3.679
50 08 53 33.23 +64 27 48.31 3.74 (1.8 ± 0.5) x 10-4 99 3.741 3.536
51 08 56 58.89 +64 26 15.41 3.78 (2.0 ± 0.6) x 10-4 164 3.588 3.461
52 08 54 33.37 +64 27 35.70 3.65 (2.4 ± 0.7) x 10-4 166 4.622 3.423
53 08 55 33.09 +64 14 20.10 3.71 (2.0 ± 0.6) x 10-4 103 3.107 3.397
54 08 55 00.43 +64 28 00.39 3.65 (2.4 ± 0.7) x 10-4 201 5.149 3.369
55 08 55 42.52 +64 24 40.55 3.65 (2.5 ± 0.8) x 10-4 264 4.276 3.328
56 08 54 59.04 +64 32 13.89 3.67 (2.3 ± 0.7) x 10-4 170 4.574 3.269
57 08 56 39.20 +64 23 04.80 3.67 (2.0 ± 0.6) x 10-4 238 4.575 3.229
58 08 54 03.03 +64 21 36.99 3.70 (1.8 ± 0.6) x 10-4 99 3.893 3.117
59 08 55 37.55 +64 27 39.19 3.64 (2.3 ± 0.8) x 10-4 275 4.439 3.036
60 08 54 40.69 +64 33 48.05 3.69 (1.9 ± 0.6) x 10-4 125 3.300 3.003
61 08 53 59.68 +64 27 27.95 3.68 (1.8 ± 0.6) x 10-4 97 3.200 3.003

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 08 54 37.47 +64 21 21.86 3.65 (3.3 ± 0.8) x 10-4 278 4.772 4.242
2 08 54 37.31 +64 21 18.91 3.65 (2.7 ± 0.7) x 10-4 255 4.948 3.707
3 08 55 12.20 +64 28 45.74 3.62 (2.6 ± 0.8) x 10-4 389 4.971 3.482
4 08 56 15.06 +64 20 19.84 3.64 (2.2 ± 0.7) x 10-4 318 5.126 3.012
5 08 54 12.31 +64 18 39.30 3.68 (1.6 ± 0.6) x 10-4 146 3.072 2.921
6 08 55 00.32 +64 12 37.31 3.73 (1.5 ± 0.5) x 10-4 102 2.975 2.895
7 08 54 25.60 +64 29 32.82 3.67 (1.7 ± 0.6) x 10-4 167 3.398 2.780
8 08 54 41.63 +64 33 32.26 3.68 (1.7 ± 0.6) x 10-4 141 3.300 2.765
9 08 54 47.54 +64 13 26.15 3.73 (1.4 ± 0.5) x 10-4 81 3.012 2.753
10 08 54 52.61 +64 31 08.33 3.63 (1.8 ± 0.6) x 10-4 287 5.297 2.741
11 08 53 48.53 +64 19 28.91 3.68 (1.5 ± 0.6) x 10-4 98 3.060 2.655
12 08 55 28.17 +64 31 52.46 3.66 (1.7 ± 0.7) x 10-4 220 3.300 2.569
13 08 56 29.92 +64 23 41.00 3.66 (1.7 ± 0.7) x 10-4 242 3.523 2.555
14 08 54 49.55 +64 26 07.03 3.64 (1.6 ± 0.6) x 10-4 225 4.738 2.541
15 08 56 11.15 +64 25 49.32 3.64 (1.9 ± 0.7) x 10-4 383 3.145 2.535
16 08 55 43.31 +64 21 19.32 3.64 (1.6 ± 0.6) x 10-4 315 3.880 2.527
17 08 54 42.01 +64 31 36.62 3.66 (1.5 ± 0.6) x 10-4 172 4.223 2.512
18 08 56 27.27 +64 23 18.00 3.67 (1.6 ± 0.7) x 10-4 259 3.308 2.487
19 08 56 27.85 +64 21 50.81 3.67 (1.6 ± 0.6) x 10-4 180 3.178 2.480
20 08 56 43.56 +64 26 38.90 3.72 (1.4 ± 0.6) x 10-4 223 3.030 2.462
21 08 55 19.81 +64 32 24.36 3.68 (1.5 ± 0.6) x 10-4 178 3.843 2.461
22 08 55 03.02 +64 25 46.69 3.64 (1.5 ± 0.6) x 10-4 227 3.996 2.370
23 08 55 28.17 +64 31 52.46 3.66 (1.5 ± 0.6) x 10-4 220 3.418 2.340
24 08 56 27.08 +64 25 32.46 3.66 (1.5 ± 0.7) x 10-4 323 3.369 2.335
25 08 55 47.37 +64 28 48.73 3.63 (1.6 ± 0.7) x 10-4 376 4.548 2.284
26 08 55 51.31 +64 32 04.68 3.69 (1.4 ± 0.6) x 10-4 225 3.222 2.255
27 08 54 29.89 +64 16 14.04 3.70 (1.1 ± 0.5) x 10-4 99 3.030 2.253
28 08 56 27.11 +64 19 45.94 3.66 (1.3 ± 0.6) x 10-4 178 4.118 2.250
29 08 55 12.20 +64 28 45.74 3.62 (1.4 ± 0.6) x 10-4 409 3.184 2.238
30 08 56 30.30 +64 23 18.56 3.66 (1.4 ± 0.6) x 10-4 251 3.178 2.235
31 08 55 43.31 +64 21 19.32 3.64 (1.4 ± 0.6) x 10-4 326 3.564 2.226
32 08 55 50.18 +64 30 04.30 3.61 (1.5 ± 0.7) x 10-4 520 3.756 2.176
33 08 55 48.29 +64 16 55.99 3.67 (1.2 ± 0.5) x 10-4 144 2.989 2.156
34 08 56 16.16 +64 29 57.18 3.68 (1.4 ± 0.7) x 10-4 321 3.933 2.142
35 08 56 11.57 +64 19 13.31 3.65 (1.3 ± 0.6) x 10-4 176 3.684 2.132
36 08 56 45.28 +64 21 19.98 3.69 (1.2 ± 0.6) x 10-4 189 3.834 2.114
37 08 56 38.34 +64 21 52.19 3.68 (1.3 ± 0.6) x 10-4 195 4.026 2.113
38 08 55 41.59 +64 25 47.05 3.64 (1.3 ± 0.6) x 10-4 315 3.032 2.109
39 08 56 06.09 +64 27 18.49 3.65 (1.4 ± 0.7) x 10-4 368 4.771 2.056
40 08 55 11.51 +64 29 57.63 3.66 (1.2 ± 0.6) x 10-4 211 3.610 2.016
41 08 55 50.15 +64 30 04.37 3.61 (1.4 ± 0.7) x 10-4 489 3.966 2.005
42 08 54 53.32 +64 29 54.59 3.63 (1.2 ± 0.6) x 10-4 208 3.006 1.993
43 08 56 24.28 +64 25 24.53 3.66 (1.2 ± 0.6) x 10-4 316 3.369 1.984
44 08 56 05.78 +64 27 16.74 3.66 (1.3 ± 0.7) x 10-4 356 4.652 1.976
45 08 56 11.20 +64 25 46.49 3.64 (1.3 ± 0.7) x 10-4 357 3.896 1.926
46 08 55 42.51 +64 24 40.59 3.65 (1.2 ± 0.6) x 10-4 264 3.541 1.912
47 08 55 33.60 +64 27 43.24 3.64 (1.2 ± 0.7) x 10-4 286 3.032 1.896
48 08 56 29.09 +64 17 02.10 3.69 (10 ± 5) x 10-5 158 3.020 1.890
49 08 55 18.45 +64 31 17.95 3.66 (1.1 ± 0.6) x 10-4 222 3.239 1.875
50 08 56 18.47 +64 21 42.94 3.67 (1.1 ± 0.6) x 10-4 217 3.639 1.869
51 08 56 02.74 +64 20 43.17 3.66 (1.1 ± 0.6) x 10-4 189 3.016 1.862
52 08 56 02.26 +64 20 26.20 3.66 (1.1 ± 0.6) x 10-4 199 4.756 1.847
53 08 56 14.89 +64 17 30.69 3.67 (9 ± 5) x 10-5 160 4.804 1.831
54 08 56 27.83 +64 23 35.52 3.67 (1.1 ± 0.6) x 10-4 255 3.268 1.814
55 08 55 41.29 +64 18 38.07 3.65 (10 ± 5) x 10-5 204 3.250 1.808
56 08 56 26.59 +64 27 43.32 3.67 (1.2 ± 0.7) x 10-4 356 4.100 1.787
57 08 55 12.61 +64 23 44.12 3.52 (1.2 ± 0.7) x 10-4 3919 4.349 1.773
58 08 55 51.05 +64 20 28.89 3.63 (1.1 ± 0.6) x 10-4 186 3.435 1.748
59 08 54 03.13 +64 26 12.29 3.65 (1.4 ± 0.8) x 10-4 122 3.168 1.728
60 08 55 43.43 +64 32 15.66 3.67 (1.0 ± 0.6) x 10-4 225 3.089 1.710
61 08 56 13.15 +64 20 33.54 3.63 (1.1 ± 0.6) x 10-4 308 3.793 1.706
62 08 54 44.84 +64 29 11.62 3.63 (9 ± 6) x 10-5 287 5.055 1.679
63 08 55 50.18 +64 30 04.30 3.61 (1.1 ± 0.7) x 10-4 506 4.569 1.658
64 08 54 49.55 +64 26 07.03 3.64 (1.4 ± 0.9) x 10-4 225 3.347 1.646
65 08 56 06.18 +64 26 48.93 3.64 (1.1 ± 0.6) x 10-4 353 3.990 1.630
66 08 56 22.81 +64 21 42.63 3.68 (9 ± 6) x 10-5 222 3.308 1.622
67 08 56 16.84 +64 20 16.23 3.64 (1.4 ± 0.9) x 10-4 309 3.449 1.617
68 08 54 53.46 +64 31 07.73 3.63 (1.4 ± 0.9) x 10-4 293 3.610 1.596
69 08 54 50.43 +64 26 11.71 3.64 (9 ± 6) x 10-5 232 3.056 1.576
70 08 55 13.05 +64 30 01.16 3.66 (9 ± 6) x 10-5 203 3.365 1.546
71 08 55 41.24 +64 19 29.11 3.66 (9 ± 6) x 10-5 151 3.187 1.499
72 08 56 11.06 +64 25 46.71 3.64 (9 ± 6) x 10-5 353 3.090 1.458
73 08 55 58.82 +64 20 04.57 3.66 (8 ± 6) x 10-5 184 3.276 1.419
74 08 55 43.08 +64 32 07.96 3.67 (8 ± 6) x 10-5 239 3.104 1.383
75 08 55 27.33 +64 30 00.38 3.65 (8 ± 6) x 10-5 273 2.974 1.352
76 08 55 26.71 +64 30 22.50 3.65 (7 ± 6) x 10-5 246 2.974 1.298
77 08 55 12.61 +64 23 44.08 3.52 (9 ± 7) x 10-5 3879 3.820 1.277
78 08 55 24.49 +64 26 09.30 3.66 (7 ± 5) x 10-5 198 3.237 1.250
79 08 56 23.66 +64 25 34.22 3.65 (8 ± 6) x 10-5 328 4.002 1.236
80 08 56 03.29 +64 30 05.35 3.67 (8 ± 7) x 10-5 309 4.548 1.198
81 08 56 11.52 +64 19 17.83 3.64 (7 ± 6) x 10-5 185 3.927 1.188
82 08 56 01.48 +64 24 57.71 3.65 (6 ± 6) x 10-5 257 3.363 1.108
83 08 54 40.84 +64 26 01.61 3.64 (6 ± 6) x 10-5 205 3.303 1.003
84 08 54 49.55 +64 26 07.04 3.64 (5 ± 5) x 10-5 225 3.539 0.900
85 08 56 15.06 +64 20 19.84 3.64 (6 ± 7) x 10-5 318 3.148 0.854
86 08 54 44.84 +64 29 11.62 3.63 (5 ± 5) x 10-5 278 4.019 0.851
87 08 55 12.26 +64 28 45.57 3.62 (5 ± 6) x 10-5 389 3.184 0.839
88 08 55 27.24 +64 26 45.95 3.66 (4 ± 6) x 10-5 231 3.330 0.801
89 08 55 28.72 +64 28 08.98 3.65 (3 ± 6) x 10-5 253 4.021 0.588
90 08 55 59.33 +64 19 37.51 3.65 (2 ± 5) x 10-5 186 3.060 0.442
91 08 56 11.15 +64 25 49.32 3.64 (2 ± 5) x 10-5 379 3.081 0.304
92 08 54 53.67 +64 30 20.46 3.63 N/A 198 3.239 N/A
93 08 54 54.51 +64 29 59.05 3.65 N/A 206 2.974 N/A
94 08 55 12.61 +64 23 44.13 3.52 N/A 3899 7.716 N/A
95 08 55 12.61 +64 23 44.12 3.52 N/A 3919 3.499 N/A
96 08 55 12.62 +64 23 44.10 3.52 N/A 3838 4.691 N/A
97 08 55 12.61 +64 23 44.08 3.52 N/A 3899 3.738 N/A
98 08 55 12.61 +64 23 44.13 3.52 N/A 3899 4.534 N/A
99 08 55 12.61 +64 23 44.08 3.52 N/A 3899 5.509 N/A
100 08 55 12.61 +64 23 44.13 3.52 N/A 3859 5.038 N/A
101 08 55 12.61 +64 23 44.13 3.52 N/A 3859 3.496 N/A
102 08 55 12.61 +64 23 44.13 3.52 N/A 3859 7.103 N/A

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 3FGL J0856.4+6429 Swift-XRT image with known radio, optical and UV sources for 3FGL J0856.4+6429

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 MCG+11-11-032 08 55 15.65 +64 24 22.68 8.96 SWIFT
2 IGR J08557+6420 08 55 46.80 +64 20 56.40 9.23 INTEGRAL
3 IGR J08557+6420 08 55 32.88 +64 21 39.60 9.40 INTEGRAL
4 IGR J08557+6420 08 55 12.50 +64 23 45.96 9.58 INTEGRAL
IGR J08557+6420 08 55 12.55 +64 23 45.60 9.58 INTEGRAL

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
TGSSADR J085630.6+642311 08 56 30.70 +64 23 11.04 5.90 GMRTAS150M
1 NVSS J085630+642306 08 56 31.01 +64 23 07.08 5.98 NVSS
WN 0852.2+6434 08 56 30.19 +64 23 06.00 5.99 WENSS
2 FIRST J085603.0+641952 08 56 03.00 +64 19 53.04 9.54 FIRST
3 NVSS J085620+641855 08 56 20.21 +64 18 55.08 10.17 NVSS
TGSSADR J085620.1+641855 08 56 20.21 +64 18 55.08 10.18 GMRTAS150M
FIRST J085620.2+641854 08 56 20.30 +64 18 55.08 10.19 FIRST
TXS 0852+645 08 56 20.11 +64 18 54.00 10.19 TEXAS
WN 0852.0+6430 08 56 20.30 +64 18 54.00 10.19 WENSS
7C 085205.5+643024 08 56 20.30 +64 18 54.00 10.20 UC7C151MHZ
8C 0852+645 08 56 16.90 +64 18 51.84 10.27 RRS8C38MHZ
WN 0850.6+6437 08 54 52.90 +64 26 08.88 10.50 WENSS
4 NVSS J085532+642018 08 55 32.40 +64 20 17.88 10.53 NVSS
FIRST J085650.2+641850 08 56 50.30 +64 18 51.12 10.55 FIRST
5 NVSS J085649+641848 08 56 49.51 +64 18 48.96 10.57 NVSS
FIRST J085532.1+642015 08 55 32.11 +64 20 16.08 10.59 FIRST
6 NVSS J085449+642606 08 54 49.70 +64 26 06.00 10.84 NVSS
FIRST J085449.5+642605 08 54 49.61 +64 26 06.00 10.86 FIRST
7 NVSS J085440+642027 08 54 40.01 +64 20 26.88 14.37 NVSS
FIRST J085440.3+642024 08 54 40.30 +64 20 24.00 14.37 FIRST

Penn State University Goddard Space Flight Center Swift