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 J1831.7-0230

Field

Detected Excesses

Swift-XRT image of the field for 3FGL J1831.7-0230 Swift-XRT detections in the field for 3FGL J1831.7-0230


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 31 46.46 -02 25 08.77 6.78 (2.3 ± 1.0) x 10-3 12 2.462 2.358
2 18 32 17.66 -02 29 58.70 7.09 (2.3 ± 1.0) x 10-3 10 2.521 2.356
3 18 32 06.81 -02 32 15.15 5.96 (2.2 ± 1.0) x 10-3 13 2.434 2.158

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 3FGL J1831.7-0230 Swift-XRT image with known radio, optical and UV sources for 3FGL J1831.7-0230


No known X-ray or gamma ray sources found.

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 LHE448 18 31 36.79 -02 33 47.88 4.42 DIXON
2 NVSS J183131-022719 18 31 31.80 -02 27 19.08 4.50 NVSS
3 NVSS J183145-023606 18 31 45.50 -02 36 06.84 6.07 NVSS
4 NVSS J183213-022728 18 32 13.30 -02 27 29.16 7.25 NVSS
5 NVSS J183128-023617 18 31 28.70 -02 36 16.92 7.61 NVSS
6 NVSS J183208-022325 18 32 09.00 -02 23 25.08 8.74 NVSS
7 NVSS J183224-022956 18 32 24.41 -02 29 56.04 9.58 NVSS
8 NVSS J183222-023323 18 32 22.30 -02 33 23.04 9.63 NVSS
9 NVSS J183114-023536 18 31 14.40 -02 35 35.88 9.67 NVSS
TGSSADR J183222.4-023321 18 32 22.51 -02 33 21.96 9.68 GMRTAS150M
TGSSADR J183114.2-023535 18 31 14.30 -02 35 35.16 9.69 GMRTAS150M
10 NVSS J183226-022809 18 32 26.50 -02 28 09.12 10.26 NVSS
11 NVSS J183223-022432 18 32 23.50 -02 24 33.12 10.83 NVSS
12 NVSS J183208-022048 18 32 08.81 -02 20 48.12 10.84 NVSS
13 NVSS J183102-023402 18 31 02.30 -02 34 03.00 11.66 NVSS
14 NVSS J183059-022803 18 30 58.99 -02 28 04.08 11.92 NVSS
15 NVSS J183134-021820 18 31 34.39 -02 18 20.16 12.07 NVSS
VLSSr J183102.1-022453 18 31 02.21 -02 24 54.00 12.12 VLSSR
16 NVSS J183101-022504 18 31 01.70 -02 25 04.08 12.15 NVSS
TGSSADR J183101.7-022503 18 31 01.70 -02 25 04.08 12.15 GMRTAS150M
17 NVSS J183220-022125 18 32 20.50 -02 21 25.92 12.16 NVSS
TXS 1828-024 18 31 01.61 -02 25 00.84 12.19 TEXAS
1828-024 18 31 01.39 -02 24 55.08 12.28 MRC
18 NVSS J183101-023516 18 31 01.49 -02 35 17.16 12.31 NVSS
PMN J1831-0224 18 31 01.70 -02 24 36.00 12.35 PMN
19 NVSS J183125-021844 18 31 25.70 -02 18 45.00 12.39 NVSS
20 NVSS J183100-023644 18 31 00.29 -02 36 43.92 13.24 NVSS
21 NVSS J183229-021903 18 32 29.50 -02 19 03.00 15.44 NVSS
TGSSADR J183230.3-021915 18 32 30.41 -02 19 14.88 15.45 GMRTAS150M

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