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.

4FGL J1811.9-2336

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1811.9-2336 Swift-XRT detections in the field for 4FGL J1811.9-2336

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 12 11.70 -23 49 05.63 5.53 (1.1 ± 0.2) x 10-2 26 4.700 4.740
2 18 11 43.20 -23 42 00.30 4.95 (8 ± 2) x 10-3 42 5.367 3.644

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1811.9-2336 Swift-XRT image with known radio, optical and UV sources for 4FGL J1811.9-2336

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2EG J1811-2339 18 11 54.00 -23 38 60.00 2.31 MGGAMMACAT
2 1BMW 181143.1-232650 18 11 43.08 -23 26 49.56 10.56 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 HD 314025 18 12 00.94 -23 34 28.20 2.41 HDEC
2 NVSS J181140-233717 18 11 40.61 -23 37 18.12 4.05 NVSS
3 PGC 205698 18 12 03.79 -23 41 34.08 4.94 PGC2003
4 WDS J18119-2331 18 11 54.00 -23 31 00.12 5.88 WDS
5 SAO 186437 18 11 43.37 -23 42 03.60 6.26 SAO
HR 6801 18 11 43.39 -23 42 03.96 6.26 BSC5P
HD 166464 18 11 43.34 -23 42 03.60 6.26 HIC
HIP 89153 18 11 43.32 -23 42 04.32 6.27 HIPPARCOS
PPM 268021 18 11 43.37 -23 42 04.68 6.28 PPM
CD-2314047 18 11 43.34 -23 42 04.68 6.28 ACRS
WDS J18117-2342 18 11 42.00 -23 41 60.00 6.39 WDS
6 HD 314036 18 11 35.28 -23 42 57.60 8.09 HDEC
7 HD 314188 18 12 28.51 -23 31 10.92 8.94 HDEC
8 HD 314187 18 12 23.02 -23 29 54.24 8.94 HDEC
9 NVSS J181125-233132 18 11 25.90 -23 31 32.88 9.08 NVSS
10 NVSS J181118-233653 18 11 18.10 -23 36 52.92 9.18 NVSS
11 PMN J1811-2331 18 11 20.50 -23 31 14.16 10.27 PMN
12 HD 314026 18 11 12.74 -23 38 53.16 10.61 HDEC
13 NVSS J181220-234647 18 12 21.00 -23 46 46.92 11.27 NVSS
14 SAO 186470 18 12 46.80 -23 34 07.68 11.45 SAO
CD-2314066 18 12 46.97 -23 34 06.60 11.50 ACRS
PPM 268055 18 12 46.99 -23 34 06.24 11.50 PPM
15 NVSS J181246-234038 18 12 46.61 -23 40 39.00 11.75 NVSS
16 HD 314037 18 11 48.24 -23 48 24.84 11.84 HDEC
17 NVSS J181119-234459 18 11 19.49 -23 44 58.92 12.07 NVSS
18 NVSS J181113-232957 18 11 13.80 -23 29 57.12 12.26 NVSS
19 NVSS J181227-234844 18 12 27.19 -23 48 45.00 13.66 NVSS
20 NVSS J181118-234740 18 11 18.70 -23 47 40.92 14.14 NVSS
S 31 18 11 18.24 -23 47 49.20 14.32 HIIREGION
21 HD 314024 18 11 09.89 -23 27 33.48 14.42 HDEC

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