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 J1813.7-6846

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1813.7-6846 Swift-XRT detections in the field for 4FGL J1813.7-6846

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 13 07.56 -68 47 13.16 4.48 (2.7 ± 0.6) x 10-3 53 4.931 4.538
2 18 12 37.92 -68 44 02.14 4.76 (2.0 ± 0.5) x 10-3 38 3.671 3.835
3 18 13 14.92 -68 45 00.22 4.76 (1.4 ± 0.5) x 10-3 39 3.286 3.016

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 23.80 -68 40 53.22 5.24 (1.2 ± 0.4) x 10-3 25 2.856 2.781
2 18 14 58.58 -68 37 34.32 4.86 (1.0 ± 0.4) x 10-3 13 2.814 2.569
3 18 13 25.21 -68 32 51.56 4.83 (1.0 ± 0.4) x 10-3 18 2.668 2.439
4 18 13 45.98 -68 49 03.24 4.95 (8 ± 4) x 10-4 27 2.529 1.952

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1813.7-6846 Swift-XRT image with known radio, optical and UV sources for 4FGL J1813.7-6846


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 J181348-684459 18 13 48.31 -68 45 00.00 1.72 SUMSS
2 SUMSS J181332-684450 18 13 32.69 -68 44 51.00 2.30 SUMSS
3 WDS J18129-6843 18 12 54.00 -68 43 00.12 6.11 WDS
PPM 363199 18 12 51.50 -68 43 06.24 6.23 PPM
4 SUMSS J181439-685146 18 14 39.60 -68 51 46.08 6.91 SUMSS
QORG J181440.4-685152 18 14 40.39 -68 51 51.84 7.03 QORGCAT
5 SUMSS J181246-684212 18 12 46.61 -68 42 12.96 7.13 SUMSS
6 SUMSS J181229-684105 18 12 29.81 -68 41 04.92 9.02 SUMSS
7 PPM 781914 18 12 57.55 -68 36 37.44 11.06 PPM
CD-68 1942 18 12 57.50 -68 36 37.44 11.06 ACRS
8 SUMSS J181409-685735 18 14 09.41 -68 57 36.00 11.07 SUMSS
9 PGC 283342 18 11 44.90 -68 48 15.12 11.20 PGC2003
QORG J181208.6-685431 18 12 08.59 -68 54 30.96 11.86 QORGCAT
10 SUMSS J181207-685430 18 12 07.99 -68 54 29.88 11.90 SUMSS

Penn State University Goddard Space Flight Center Swift