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 12.67 +64 23 44.03 3.53 (2.48 ± 0.05) x 10-2 2596 49.390 46.810
2 08 55 13.27 +64 17 47.04 3.74 (1.46 ± 0.14) x 10-3 185 10.010 10.350
3 08 55 50.16 +64 30 04.50 3.68 (1.6 ± 0.2) x 10-3 311 10.110 9.894
4 08 55 40.26 +64 23 03.88 3.70 (1.5 ± 0.2) x 10-3 240 9.728 9.820
5 08 55 12.44 +64 28 44.16 3.69 (1.4 ± 0.2) x 10-3 248 9.502 9.518
6 08 54 00.27 +64 25 32.80 3.73 (1.01 ± 0.13) x 10-3 155 8.678 8.015
7 08 56 15.15 +64 20 22.52 3.72 (1.05 ± 0.13) x 10-3 205 7.722 7.848
8 08 54 37.77 +64 21 17.55 3.75 (9.1 ± 1.2) x 10-4 156 7.821 7.546
9 08 55 24.82 +64 19 17.49 3.71 (9.8 ± 1.3) x 10-4 193 8.475 7.501
10 08 54 18.02 +64 25 10.45 3.79 (7.7 ± 1.1) x 10-4 127 6.615 6.843
11 08 55 43.09 +64 21 20.15 3.73 (8.4 ± 1.2) x 10-4 190 6.844 6.812
12 08 55 41.80 +64 25 45.82 3.74 (8.4 ± 1.2) x 10-4 190 6.316 6.699
13 08 54 52.96 +64 31 08.63 3.73 (7.7 ± 1.2) x 10-4 168 6.761 6.548
14 08 54 16.71 +64 27 26.41 3.81 (6.6 ± 1.0) x 10-4 118 5.967 6.399
15 08 56 11.34 +64 25 47.79 3.73 (7.6 ± 1.2) x 10-4 205 6.206 6.137
16 08 55 06.46 +64 20 26.94 3.74 (6.6 ± 1.1) x 10-4 123 6.164 5.996
17 08 55 28.29 +64 24 49.60 3.72 (7.2 ± 1.2) x 10-4 167 5.938 5.975
18 08 55 47.99 +64 29 14.09 3.67 (7.3 ± 1.3) x 10-4 249 6.583 5.780
19 08 56 47.58 +64 29 57.95 3.86 (5.2 ± 1.0) x 10-4 162 4.956 5.148
20 08 54 03.09 +64 14 20.98 4.00 (3.8 ± 0.8) x 10-4 49 5.038 4.823
21 08 56 07.92 +64 24 10.64 3.75 (4.9 ± 1.1) x 10-4 175 3.659 4.537
22 08 55 45.19 +64 14 59.37 3.83 (4.0 ± 0.9) x 10-4 81 4.468 4.527
23 08 54 44.04 +64 29 16.63 3.72 (4.5 ± 1.0) x 10-4 147 5.111 4.435
24 08 55 41.44 +64 18 38.65 3.74 (4.4 ± 1.0) x 10-4 124 5.286 4.387
25 08 56 30.03 +64 16 59.61 3.78 (4.1 ± 1.0) x 10-4 115 4.684 4.315
26 08 55 28.47 +64 30 17.81 3.76 (4.0 ± 1.0) x 10-4 145 3.898 4.032
27 08 54 41.07 +64 25 59.85 3.73 (3.8 ± 1.0) x 10-4 118 3.978 3.989
28 08 56 35.38 +64 13 55.52 4.18 (2.7 ± 0.7) x 10-4 42 3.326 3.923
29 08 53 53.41 +64 19 44.61 3.92 (2.9 ± 0.7) x 10-4 60 3.324 3.881
30 08 54 31.73 +64 26 23.34 3.75 (3.4 ± 0.9) x 10-4 99 3.926 3.839
31 08 54 27.86 +64 19 43.81 3.86 (3.0 ± 0.8) x 10-4 89 4.564 3.776
32 08 54 25.50 +64 29 33.86 3.79 (3.1 ± 0.8) x 10-4 108 3.080 3.662
33 08 57 05.23 +64 19 06.95 3.86 (3.0 ± 0.8) x 10-4 99 4.510 3.563
34 08 56 03.66 +64 19 09.77 3.75 (3.1 ± 0.9) x 10-4 113 3.170 3.422
35 08 55 43.02 +64 32 05.18 3.79 (3.2 ± 0.9) x 10-4 144 3.218 3.384
36 08 56 59.23 +64 26 17.83 3.84 (3.0 ± 0.9) x 10-4 135 3.478 3.301
37 08 54 12.92 +64 18 41.63 3.84 (2.4 ± 0.7) x 10-4 77 3.408 3.296
38 08 53 50.67 +64 15 46.86 4.02 (2.1 ± 0.7) x 10-4 39 3.090 3.263
39 08 54 07.07 +64 19 47.63 3.83 (2.5 ± 0.8) x 10-4 66 3.122 3.039

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 37.72 +64 21 18.45 3.76 (3.5 ± 1.0) x 10-4 156 3.385 3.371
2 08 54 37.77 +64 21 17.55 3.75 (2.9 ± 1.0) x 10-4 156 3.029 3.034
3 08 55 24.93 +64 19 17.74 3.71 (3.0 ± 1.0) x 10-4 187 3.519 3.001
4 08 54 25.50 +64 29 33.84 3.79 (2.2 ± 0.8) x 10-4 108 2.912 2.929
5 08 56 33.56 +64 20 34.02 3.75 (2.5 ± 0.9) x 10-4 132 3.873 2.916
6 08 54 55.85 +64 21 29.42 3.76 (2.3 ± 0.8) x 10-4 101 3.404 2.874
7 08 56 43.52 +64 20 10.45 3.76 (1.3 ± 0.8) x 10-4 112 3.035 1.650
8 08 55 12.67 +64 23 44.03 3.53 N/A 2584 5.617 N/A
9 08 55 12.68 +64 23 43.92 3.53 N/A 2596 3.324 N/A
10 08 55 12.67 +64 23 44.03 3.53 N/A 2632 3.634 N/A
11 08 55 12.67 +64 23 44.03 3.53 N/A 2632 4.126 N/A
12 08 55 12.67 +64 23 44.03 3.53 N/A 2584 4.184 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