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 J1813.6-6845

Field

Detected Excesses

Swift-XRT image of the field for 3FGL J1813.6-6845 Swift-XRT detections in the field for 3FGL J1813.6-6845

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 13 07.62 -68 47 13.25 4.48 (2.7 ± 0.6) x 10-3 53 4.938 4.555
2 18 12 37.88 -68 44 02.31 4.78 (2.0 ± 0.5) x 10-3 39 3.820 3.763
3 18 13 15.31 -68 44 55.45 4.76 (1.4 ± 0.5) x 10-3 43 3.392 3.047

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 13 23.89 -68 40 54.13 5.20 (1.2 ± 0.4) x 10-3 26 2.893 2.805
2 18 14 57.00 -68 38 18.09 5.00 (1.0 ± 0.4) x 10-3 21 2.780 2.559
3 18 14 18.30 -68 39 29.61 5.00 (1.0 ± 0.4) x 10-3 18 2.544 2.545
4 18 13 24.36 -68 32 49.16 4.81 (1.0 ± 0.4) x 10-3 21 2.694 2.308

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 3FGL J1813.6-6845 Swift-XRT image with known radio, optical and UV sources for 3FGL J1813.6-6845


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 SUMSS J181332-684450 18 13 32.69 -68 44 51.00 1.12 SUMSS
2 SUMSS J181348-684459 18 13 48.31 -68 45 00.00 1.15 SUMSS
3 SUMSS J181246-684212 18 12 46.61 -68 42 12.96 5.97 SUMSS
4 SUMSS J181229-684105 18 12 29.81 -68 41 04.92 7.87 SUMSS
5 SUMSS J181439-685146 18 14 39.60 -68 51 46.08 8.09 SUMSS
6 SUMSS J181207-685430 18 12 07.99 -68 54 29.88 11.98 SUMSS
7 SUMSS J181409-685735 18 14 09.41 -68 57 36.00 12.10 SUMSS

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