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 J1838.0-0516

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1838.0-0516 Swift-XRT detections in the field for 4FGL J1838.0-0516


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 18 37 26.81 -05 17 23.94 5.96 (3.5 ± 1.2) x 10-3 14 3.113 2.820
2 18 37 41.95 -05 10 23.12 5.82 (2.8 ± 1.1) x 10-3 14 2.971 2.474
3 18 38 11.56 -05 26 34.77 7.09 (2.3 ± 1.0) x 10-3 12 2.429 2.470
4 18 38 22.03 -05 10 51.31 6.78 (2.4 ± 1.0) x 10-3 12 2.529 2.427
5 18 37 25.22 -05 18 05.29 5.76 (2.7 ± 1.2) x 10-3 15 2.536 2.303

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1838.0-0516 Swift-XRT image with known radio, optical and UV sources for 4FGL J1838.0-0516

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 4XMMs J183831.8-052457 18 38 31.80 -05 24 57.96 10.99 XMM-NEWTON
4XMM J183831.8-052500 18 38 31.80 -05 25 00.12 11.02 XMM-NEWTON
2 4XMMs J183823.6-052709 18 38 23.66 -05 27 09.36 11.71 XMM-NEWTON
4XMM J183823.6-052709 18 38 23.66 -05 27 10.08 11.72 XMM-NEWTON
3 4XMMs J183837.2-052601 18 38 37.30 -05 26 02.04 12.69 XMM-NEWTON
4XMM J183837.3-052601 18 38 37.37 -05 26 01.32 12.70 XMM-NEWTON

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 PPM 201968 18 38 10.44 -05 19 09.48 3.13 PPM
2 NVSS J183803-052015 18 38 03.79 -05 20 16.08 3.65 NVSS
3 NVSS J183816-051822 18 38 16.39 -05 18 23.04 3.76 NVSS
4 MAGPIS Discrete G26.65028+0.52 18 38 04.80 -05 20 56.04 4.33 MAGPIS
5 PMN J1838-0517 18 38 20.21 -05 17 48.84 4.43 PMN
6 MAGPIS Discrete G26.64415+0.61 18 37 44.59 -05 18 45.00 5.06 MAGPIS
7 MAGPIS Discrete G26.64323+0.62 18 37 42.19 -05 18 30.96 5.52 MAGPIS
8 NVSS J183824-051217 18 38 24.00 -05 12 18.00 6.77 NVSS
MAGPIS Discrete G26.81487+0.51 18 38 24.19 -05 12 19.08 6.80 MAGPIS
9 MAGPIS Discrete G26.78256+0.68 18 37 45.10 -05 09 28.08 8.43 MAGPIS
10 MAGPIS Discrete G26.61529+0.44 18 38 17.40 -05 24 55.08 9.04 MAGPIS
11 MAGPIS Discrete G26.63806+0.70 18 37 25.30 -05 16 41.16 9.40 MAGPIS
12 MAGPIS Discrete G26.60740+0.43 18 38 17.81 -05 25 30.00 9.61 MAGPIS
13 MAGPIS Discrete G26.78463+0.41 18 38 41.90 -05 16 37.92 9.67 MAGPIS
14 PPM 201946 18 37 33.77 -05 23 09.96 9.80 PPM
15 MAGPIS Discrete G26.54980+0.52 18 37 52.70 -05 26 08.88 9.88 MAGPIS
16 V437 Sct 18 37 32.52 -05 23 59.28 10.59 GCVS
17 NVSS J183729-050930 18 37 29.81 -05 09 29.88 10.92 NVSS
18 NVSS J183841-052152 18 38 41.71 -05 21 51.84 10.96 NVSS
19 PPM 707175 18 38 46.58 -05 18 38.16 11.02 PPM
20 NVSS J183723-051039 18 37 23.11 -05 10 40.08 11.60 NVSS
21 NVSS J183847-051243 18 38 47.59 -05 12 42.84 11.74 NVSS
MAGPIS Discrete G26.84925+0.42 18 38 48.19 -05 13 05.16 11.78 MAGPIS
22 NVSS J183846-052144 18 38 46.70 -05 21 43.92 12.01 NVSS
23 MAGPIS Discrete G26.72872+0.76 18 37 22.01 -05 10 08.04 12.12 MAGPIS
24 PMN J1837-0509 18 37 23.50 -05 09 15.84 12.29 PMN
25 NVSS J183848-052259 18 38 48.00 -05 22 59.16 12.87 NVSS
26 NVSS J183734-052721 18 37 34.10 -05 27 20.88 12.92 NVSS
27 MAGPIS Discrete G26.78665+0.76 18 37 28.10 -05 07 00.12 12.97 MAGPIS
28 NVSS J183846-050907 18 38 46.01 -05 09 06.84 13.06 NVSS
29 NVSS J183722-050802 18 37 22.01 -05 08 02.04 13.35 NVSS
30 NVSS J183848-050941 18 38 48.91 -05 09 41.04 13.36 NVSS
31 NVSS J183729-050607 18 37 29.21 -05 06 07.92 13.46 NVSS
32 NVSS J183845-050804 18 38 45.70 -05 08 04.92 13.63 NVSS
33 MAGPIS Discrete G26.73587+0.79 18 37 15.79 -05 08 51.00 14.11 MAGPIS
34 NVSS J183845-052705 18 38 45.19 -05 27 05.04 14.81 NVSS

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