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 J1656.2-3257

Field

Detected Excesses

Swift-XRT image of the field for 1FGL J1656.2-3257 Swift-XRT detections in the field for 1FGL J1656.2-3257

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 16 56 16.85 -33 02 11.19 3.59 (9.2 ± 0.3) x 10-2 951 28.280 29.220
2 16 55 57.65 -32 59 47.23 4.00 (1.39 ± 0.13) x 10-2 153 10.940 11.030
3 16 56 28.39 -33 05 28.86 4.47 (4.9 ± 0.8) x 10-3 58 6.569 6.452
4 16 55 43.17 -32 54 27.47 5.49 (1.8 ± 0.5) x 10-3 26 3.748 3.845
5 16 56 33.99 -32 55 35.98 5.11 (1.8 ± 0.5) x 10-3 29 3.785 3.601
6 16 56 43.63 -33 01 49.88 4.67 (1.8 ± 0.5) x 10-3 33 4.151 3.526

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 16 55 28.86 -32 56 40.38 5.02 (1.2 ± 0.4) x 10-3 24 3.397 2.841
2 16 55 59.34 -33 05 47.47 5.40 (1.1 ± 0.4) x 10-3 20 2.927 2.670
3 16 55 41.95 -32 57 45.43 5.02 (1.1 ± 0.4) x 10-3 25 2.884 2.552
4 16 55 48.45 -33 08 03.94 5.31 (7 ± 3) x 10-4 13 2.448 2.002

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 1FGL J1656.2-3257 Swift-XRT image with known radio, optical and UV sources for 1FGL J1656.2-3257

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 3XMM J165609.0-325934 16 56 09.60 -32 59 34.80 2.65 XMM-NEWTON
2 1RXS J165559.6-325628 16 55 59.59 -32 56 27.96 2.92 ROSAT
3 3XMM J165557.4-325706 16 55 57.48 -32 57 06.48 3.29 XMM-NEWTON
4 3XMM J165616.5-330030 16 56 16.58 -33 00 30.60 3.51 XMM-NEWTON
5 3XMM J165632.7-325702 16 56 32.78 -32 57 02.52 4.11 XMM-NEWTON
6 3XMM J165557.6-325946 16 55 57.67 -32 59 46.32 4.23 XMM-NEWTON
7 3XMM J165629.7-325938 16 56 29.78 -32 59 38.04 4.32 XMM-NEWTON
8 3XMM J165616.5-330123 16 56 16.56 -33 01 23.88 4.38 XMM-NEWTON
9 3XMM J165633.7-325532 16 56 33.74 -32 55 32.88 4.57 XMM-NEWTON
1RXS J165616.6-330150 16 56 16.61 -33 01 50.52 4.82 ROSAT
2RXS J165616.6-330150 16 56 16.61 -33 01 50.88 4.83 ROSAT
10 3XMM J165602.1-330133 16 56 02.14 -33 01 33.24 5.04 XMM-NEWTON
11 XMMSL2 J165616.8-330205 16 56 16.92 -33 02 04.56 5.06 XMM-NEWTON
12 3XMM J165558.4-330105 16 55 58.44 -33 01 05.52 5.07 XMM-NEWTON
3XMM J165616.8-330210 16 56 16.85 -33 02 10.68 5.16 XMM-NEWTON
SWIFT J1656.3-3302 16 56 16.85 -33 02 11.04 5.16 INTEGRAL
[MML2015] 5BZQ J1656-3302 16 56 16.85 -33 02 11.04 5.16 null
SWIFT J165616.5-3302 16 56 16.80 -33 02 12.12 5.18 INTEGRAL
XMMSL2 J165616.8-330205 16 56 17.42 -33 02 11.04 5.18 XMM-NEWTON
IGR J16562-3301 16 56 16.82 -33 02 12.48 5.19 INTEGRAL
SWIFT J1656.3-3302 16 56 16.80 -33 02 13.20 5.20 INTEGRAL
13 3XMM J165636.7-325850 16 56 36.79 -32 58 50.52 5.25 XMM-NEWTON
14 IGR J16562-3301 16 56 21.36 -33 02 16.80 5.48 INTEGRAL
IGR J16562-3301 16 56 21.60 -33 02 24.00 5.61 INTEGRAL
IGR J16562-3301 16 56 20.40 -33 02 31.20 5.65 INTEGRAL
15 3XMM J165639.1-325505 16 56 39.17 -32 55 05.52 5.80 XMM-NEWTON
16 3XMM J165616.5-330253 16 56 16.58 -33 02 53.16 5.85 XMM-NEWTON
17 3XMM J165641.0-325629 16 56 41.11 -32 56 29.76 5.86 XMM-NEWTON
18 3XMM J165600.5-325127 16 56 00.50 -32 51 27.36 6.22 XMM-NEWTON
19 3XMM J165555.3-330206 16 55 55.37 -33 02 06.36 6.27 XMM-NEWTON
20 3XMM J165604.0-325102 16 56 04.20 -32 51 02.88 6.33 XMM-NEWTON
21 3XMM J165642.9-325845 16 56 42.98 -32 58 45.84 6.47 XMM-NEWTON
22 3XMM J165542.8-325555 16 55 42.79 -32 55 55.20 6.48 XMM-NEWTON
23 3XMM J165541.9-325751 16 55 42.00 -32 57 51.84 6.59 XMM-NEWTON
24 3XMM J165642.5-325932 16 56 42.55 -32 59 32.28 6.63 XMM-NEWTON
3XMM J165555.1-330235 16 55 55.18 -33 02 35.16 6.68 XMM-NEWTON
25 3XMM J165542.5-325432 16 55 42.58 -32 54 32.40 6.91 XMM-NEWTON
26 3XMM J165602.9-325026 16 56 02.90 -32 50 26.88 6.97 XMM-NEWTON
27 3XMM J165539.9-325639 16 55 39.94 -32 56 39.84 6.99 XMM-NEWTON
28 3XMM J165618.6-330358 16 56 18.67 -33 03 58.68 6.99 XMM-NEWTON
29 3XMM J165558.5-325042 16 55 58.54 -32 50 42.72 7.07 XMM-NEWTON
30 3XMM J165539.5-325542 16 55 39.60 -32 55 41.88 7.18 XMM-NEWTON
31 3XMM J165647.0-325529 16 56 47.71 -32 55 30.00 7.28 XMM-NEWTON
32 3XMM J165648.4-325743 16 56 48.41 -32 57 43.56 7.42 XMM-NEWTON
33 3XMM J165550.6-325101 16 55 50.64 -32 51 01.80 7.68 XMM-NEWTON
34 3XMM J165543.0-330133 16 55 43.70 -33 01 33.96 7.75 XMM-NEWTON
35 3XMM J165643.7-330155 16 56 43.73 -33 01 55.56 8.03 XMM-NEWTON
36 3XMM J165632.4-325007 16 56 32.40 -32 50 07.80 8.03 XMM-NEWTON
37 3XMM J165535.0-325846 16 55 35.71 -32 58 46.56 8.18 XMM-NEWTON
38 3XMM J165651.9-325819 16 56 51.94 -32 58 19.20 8.22 XMM-NEWTON
39 3XMM J165535.4-325957 16 55 35.50 -32 59 57.12 8.41 XMM-NEWTON
40 3XMM J165621.1-324840 16 56 21.10 -32 48 39.96 8.57 XMM-NEWTON
41 3XMM J165641.7-330323 16 56 41.71 -33 03 23.04 8.69 XMM-NEWTON
42 3XMM J165651.7-330026 16 56 51.72 -33 00 27.00 8.75 XMM-NEWTON
43 3XMM J165649.9-330126 16 56 49.92 -33 01 26.04 8.85 XMM-NEWTON
2RXS J165641.9-330333 16 56 41.93 -33 03 33.84 8.85 ROSAT
1RXS J165641.9-330336 16 56 41.90 -33 03 36.00 8.87 ROSAT
44 3XMM J165628.2-330528 16 56 28.25 -33 05 29.04 8.98 XMM-NEWTON
45 3XMM J165559.7-330554 16 55 59.78 -33 05 54.60 9.27 XMM-NEWTON
46 3XMM J165528.6-325635 16 55 28.68 -32 56 35.52 9.35 XMM-NEWTON
47 3XMM J165530.4-325953 16 55 30.43 -32 59 53.52 9.40 XMM-NEWTON
3XMM J165558.1-330614 16 55 58.18 -33 06 14.76 9.69 XMM-NEWTON
48 3XMM J165655.1-325233 16 56 55.15 -32 52 33.96 9.89 XMM-NEWTON
49 3XMM J165536.7-330321 16 55 36.72 -33 03 21.24 9.89 XMM-NEWTON
50 3XMM J165635.7-330554 16 56 35.78 -33 05 54.96 10.02 XMM-NEWTON
51 3XMM J165705.4-325828 16 57 05.40 -32 58 28.20 11.04 XMM-NEWTON
52 3XMM J165658.5-330259 16 56 58.56 -33 02 59.28 11.20 XMM-NEWTON
53 3XMM J165624.1-330841 16 56 24.12 -33 08 41.64 11.84 XMM-NEWTON
3XMM J165622.2-330847 16 56 22.27 -33 08 47.04 11.86 XMM-NEWTON
54 3XMM J165548.4-330801 16 55 48.48 -33 08 01.68 12.12 XMM-NEWTON
55 3XMM J165707.1-325236 16 57 07.18 -32 52 36.84 12.18 XMM-NEWTON
56 3XMM J165526.8-330425 16 55 26.83 -33 04 25.68 12.19 XMM-NEWTON
57 3XMM J165552.6-330835 16 55 52.63 -33 08 35.52 12.29 XMM-NEWTON
58 3XMM J165544.8-330802 16 55 44.81 -33 08 02.04 12.47 XMM-NEWTON
59 3XMM J165652.3-330715 16 56 52.32 -33 07 15.24 13.07 XMM-NEWTON
60 3XMM J165516.1-330231 16 55 16.10 -33 02 31.20 13.15 XMM-NEWTON
61 3XMM J165707.6-330430 16 57 07.68 -33 04 30.36 13.63 XMM-NEWTON
62 3XMM J165656.6-330750 16 56 56.62 -33 07 50.88 14.10 XMM-NEWTON
63 3XMM J165704.6-330720 16 57 04.68 -33 07 20.28 14.89 XMM-NEWTON
64 3XMM J165519.4-330748 16 55 19.44 -33 07 49.08 15.56 XMM-NEWTON

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 OS-389 16 56 32.30 -32 56 40.92 4.02 DIXON
AT20G J165616-330207 16 56 16.80 -33 02 08.16 5.11 AT20G
MGPS J165616-330210 16 56 16.80 -33 02 09.96 5.15 MGPS2
TGSSADR J165616.9-330210 16 56 16.90 -33 02 11.04 5.16 GMRTAS150M
[MML2015] 5BZQ J1656-3302 16 56 16.80 -33 02 11.04 5.16 ROMABZCAT
2 NVSS J165616-330211 16 56 16.80 -33 02 12.12 5.17 NVSS
3 NVSS J165649-325928 16 56 49.51 -32 59 29.04 7.98 NVSS
MGPS J165649-325929 16 56 49.61 -32 59 29.04 8.01 MGPS2
TGSSADR J165649.8-325930 16 56 49.90 -32 59 30.84 8.06 GMRTAS150M
TGSSADR J165529.6-330010 16 55 29.59 -33 00 11.16 9.65 GMRTAS150M
MGPS J165529-330011 16 55 29.30 -33 00 11.16 9.72 MGPS2
4 NVSS J165528-330006 16 55 28.80 -33 00 06.84 9.78 NVSS
5 NVSS J165522-325904 16 55 22.90 -32 59 04.92 10.74 NVSS
6 NVSS J165523-325406 16 55 23.30 -32 54 06.84 10.88 NVSS
7 NVSS J165535-324805 16 55 35.71 -32 48 05.04 11.94 NVSS

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