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 J2356.9+6812

Field

Detected Excesses

Swift-XRT image of the field for 3FGL J2356.9+6812 Swift-XRT detections in the field for 3FGL J2356.9+6812


No detected excesses found.

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 23 57 31.71 +68 06 38.14 5.64 (2.6 ± 1.0) x 10-3 15 2.567 2.506
2 23 57 00.72 +68 22 53.51 6.78 (1.5 ± 0.7) x 10-3 10 2.175 2.060

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 3FGL J2356.9+6812 Swift-XRT image with known radio, optical and UV sources for 3FGL J2356.9+6812

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 3XMM J235646.4+681357 23 56 46.49 +68 13 58.08 1.47 XMM-NEWTON
2 3XMM J235658.5+681124 23 56 58.54 +68 11 24.36 1.49 XMM-NEWTON
3 3XMM J235641.4+681335 23 56 41.40 +68 13 35.76 1.64 XMM-NEWTON
4 3XMM J235550.9+681140 23 55 50.95 +68 11 40.56 6.28 XMM-NEWTON
5 3XMM J235627.7+680641 23 56 27.72 +68 06 41.04 6.79 XMM-NEWTON
6 3XMM J235542.9+681400 23 55 42.96 +68 14 00.96 6.99 XMM-NEWTON
7 3XMM J235730.9+680632 23 57 30.94 +68 06 32.40 7.08 XMM-NEWTON
8 3XMM J235620.6+680637 23 56 20.59 +68 06 37.08 7.14 XMM-NEWTON
9 3XMM J235721.1+680554 23 57 21.17 +68 05 53.88 7.33 XMM-NEWTON
10 3XMM J235546.7+680928 23 55 46.73 +68 09 28.44 7.39 XMM-NEWTON
11 3XMM J235605.1+680711 23 56 05.14 +68 07 11.28 7.49 XMM-NEWTON
3XMM J235723.5+680529 23 57 23.54 +68 05 29.76 7.79 XMM-NEWTON
12 3XMM J235725.0+680503 23 57 25.70 +68 05 03.48 8.24 XMM-NEWTON
13 3XMM J235541.0+680833 23 55 41.40 +68 08 33.72 8.30 XMM-NEWTON
14 3XMM J235555.0+680640 23 55 55.10 +68 06 41.04 8.49 XMM-NEWTON
15 3XMM J235639.3+680430 23 56 39.34 +68 04 30.36 8.55 XMM-NEWTON
16 3XMM J235541.7+680758 23 55 41.76 +68 07 58.80 8.57 XMM-NEWTON
1WGA J2355.6+6807 23 55 39.50 +68 07 45.12 8.87 ROSAT
17 3XMM J235629.4+680414 23 56 29.50 +68 04 14.52 9.03 XMM-NEWTON
18 3XMM J235754.5+680533 23 57 54.50 +68 05 33.00 9.06 XMM-NEWTON
3XMM J235757.0+680535 23 57 57.50 +68 05 35.88 9.17 XMM-NEWTON
19 3XMM J235610.6+680438 23 56 10.68 +68 04 38.64 9.32 XMM-NEWTON
20 3XMM J235845.2+681335 23 58 45.29 +68 13 35.40 10.04 XMM-NEWTON
21 3XMM J235635.1+680258 23 56 35.16 +68 02 58.56 10.13 XMM-NEWTON
22 3XMM J235732.2+680316 23 57 32.26 +68 03 16.20 10.15 XMM-NEWTON
23 3XMM J235720.7+680242 23 57 20.71 +68 02 42.72 10.41 XMM-NEWTON
24 3XMM J235636.2+680222 23 56 36.19 +68 02 22.20 10.70 XMM-NEWTON
25 3XMM J235732.4+680226 23 57 32.40 +68 02 26.88 10.94 XMM-NEWTON
26 3XMM J235709.3+680149 23 57 09.41 +68 01 49.80 11.11 XMM-NEWTON
27 3XMM J235627.2+680206 23 56 27.22 +68 02 06.36 11.14 XMM-NEWTON
28 3XMM J235620.3+680211 23 56 20.35 +68 02 11.40 11.24 XMM-NEWTON
29 3XMM J235743.6+680152 23 57 43.66 +68 01 52.68 11.83 XMM-NEWTON
30 3XMM J235902.1+680931 23 59 02.16 +68 09 31.32 12.08 XMM-NEWTON
31 3XMM J235550.1+680227 23 55 50.18 +68 02 27.60 12.16 XMM-NEWTON
32 3XMM J235521.3+680354 23 55 21.34 +68 03 54.36 12.67 XMM-NEWTON
33 3XMM J235905.5+680731 23 59 05.50 +68 07 31.08 13.07 XMM-NEWTON
34 3XMM J235548.1+680129 23 55 48.12 +68 01 29.64 13.09 XMM-NEWTON
35 3XMM J235537.2+680149 23 55 37.25 +68 01 49.44 13.34 XMM-NEWTON
36 3XMM J235550.3+680058 23 55 50.35 +68 00 58.68 13.45 XMM-NEWTON
37 3XMM J235850.4+680417 23 58 50.47 +68 04 17.76 13.59 XMM-NEWTON
38 3XMM J235840.4+680304 23 58 40.39 +68 03 04.32 13.73 XMM-NEWTON
39 3XMM J235503.3+680128 23 55 03.36 +68 01 28.20 15.59 XMM-NEWTON

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J235637+681915 23 56 37.99 +68 19 14.88 6.62 NVSS
2 NVSS J235729+681916 23 57 29.50 +68 19 15.96 7.04 NVSS
WN 2354.9+6802 23 57 29.59 +68 19 15.96 7.04 WENSS
3 NVSS J235634+682026 23 56 34.80 +68 20 26.16 7.83 NVSS
WN 2355.1+6749 23 57 39.91 +68 05 49.92 8.08 WENSS
TGSSADR J235740.0+680548 23 57 40.10 +68 05 48.84 8.12 GMRTAS150M
4 NVSS J235740+680548 23 57 40.39 +68 05 48.84 8.13 NVSS
5 NVSS J235611+680432 23 56 11.71 +68 04 32.16 9.36 NVSS
6 NVSS J235817+680646 23 58 17.40 +68 06 47.16 9.63 NVSS
7 NVSS J235635+680254 23 56 35.50 +68 02 53.88 10.19 NVSS
8 NVSS J235654+682317 23 56 54.70 +68 23 17.16 10.41 NVSS
9 NVSS J235522+681834 23 55 22.99 +68 18 33.84 10.42 NVSS
WN 2352.8+6801 23 55 21.41 +68 18 36.00 10.56 WENSS
10 NVSS J235853+681027 23 58 53.90 +68 10 27.84 11.09 NVSS
WN 2356.3+6752 23 58 53.81 +68 09 11.16 11.44 WENSS
TGSSADR J235854.2+680909 23 58 54.19 +68 09 09.00 11.48 GMRTAS150M
11 NVSS J235854+680907 23 58 54.41 +68 09 06.84 11.52 NVSS
12 NVSS J235755+682420 23 57 55.80 +68 24 20.16 12.66 NVSS
13 NVSS J235822+682357 23 58 22.10 +68 23 57.12 13.56 NVSS
14 NVSS J235515+680111 23 55 15.31 +68 01 12.00 15.07 NVSS

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