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 J1556.4-6911

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1556.4-6911 Swift-XRT detections in the field for 4FGL J1556.4-6911


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 15 56 10.60 -69 03 51.25 6.41 (2.4 ± 0.9) x 10-3 11 2.608 2.601
2 15 57 25.88 -69 19 21.74 5.64 (2.5 ± 1.0) x 10-3 17 2.843 2.482
3 15 55 58.02 -69 08 17.41 6.41 (1.8 ± 0.8) x 10-3 11 2.265 2.089

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1556.4-6911 Swift-XRT image with known radio, optical and UV sources for 4FGL J1556.4-6911

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J155533.6-691822 15 55 33.60 -69 18 22.32 8.33 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 HD 142021 15 57 10.27 -69 12 38.16 4.09 HIC
HIP 78127 15 57 10.32 -69 12 38.52 4.09 HIPPARCOS
2 SUMSS J155554-690822 15 55 54.79 -69 08 22.92 4.16 SUMSS
WDS J15572-6913 15 57 12.00 -69 13 00.12 4.35 WDS
3 GLEAM J155617-691635 15 56 17.50 -69 16 36.12 5.18 GLEAMEGCAT
MC4 1551-691 15 56 16.20 -69 16 36.12 5.21 DIXON
SUMSS J155617-691640 15 56 17.90 -69 16 41.16 5.27 SUMSS
ATPMN J155617.9-691641 15 56 18.00 -69 16 41.16 5.28 ATPMNCAT
4 SPASS J155622-691648 15 56 22.99 -69 16 48.00 5.34 SPASS2P3GH
PMN J1556-6916 15 56 16.90 -69 16 49.08 5.41 PMN
5 SUMSS J155509-691511 15 55 09.19 -69 15 11.16 7.78 SUMSS
6 SUMSS J155716-691844 15 57 16.70 -69 18 43.92 8.54 SUMSS
7 SUMSS J155730-691751 15 57 30.60 -69 17 51.00 8.57 SUMSS
8 SUMSS J155756-690817 15 57 56.40 -69 08 17.16 8.63 SUMSS
GLEAM J155720-691848 15 57 20.50 -69 18 47.88 8.77 GLEAMEGCAT
9 SUMSS J155506-691646 15 55 06.29 -69 16 46.92 8.85 SUMSS
10 PMN J1557-6918 15 57 36.89 -69 18 06.12 9.13 PMN
11 WDS J15571-6902 15 57 06.00 -69 01 59.88 10.11 WDS
12 GZ TrA 15 54 26.71 -69 10 56.64 10.62 GCVS
13 SUMSS J155509-691943 15 55 09.79 -69 19 42.96 10.67 SUMSS
14 SUMSS J155739-690243 15 57 39.91 -69 02 43.08 10.94 SUMSS
15 SUMSS J155827-690448 15 58 27.19 -69 04 49.08 12.66 SUMSS

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