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 J2022.2-7220

Field

Detected Excesses

Swift-XRT image of the field for 3FGL J2022.2-7220 Swift-XRT detections in the field for 3FGL J2022.2-7220

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 20 21 43.77 -72 26 11.77 4.33 (4.6 ± 0.5) x 10-2 88 9.033 9.026
2 20 24 28.75 -72 14 20.05 7.48 (6 ± 2) x 10-3 11 2.922 3.186

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 20 23 36.09 -72 10 07.79 6.78 (4 ± 2) x 10-3 8 2.334 2.328

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 3FGL J2022.2-7220 Swift-XRT image with known radio, optical and UV sources for 3FGL J2022.2-7220

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J202205.7-722538 20 22 05.78 -72 25 37.92 5.31 ROSAT
2RXS J202205.7-722538 20 22 05.78 -72 25 37.92 5.31 ROSAT
1RXS J202204.8-722538 20 22 04.80 -72 25 38.64 5.33 ROSAT
2 2RXS J202115.3-722659 20 21 15.31 -72 26 59.64 8.04 ROSAT
2RXS J202115.3-722659 20 21 15.31 -72 26 59.64 8.04 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 SPASS J202242-722330 20 22 42.50 -72 23 30.12 3.73 SPASS2P3GH
2 PMN J2022-7223 20 22 55.61 -72 23 49.92 4.60 PMN
SUMSS J202258-722342 20 22 58.70 -72 23 42.00 4.66 SUMSS
3 SUMSS J202143-722609 20 21 43.20 -72 26 08.88 6.28 SUMSS
4 GLEAM J202053-721739 20 20 53.81 -72 17 39.12 6.79 GLEAMEGCAT
SUMSS J202052-721742 20 20 52.99 -72 17 43.08 6.82 SUMSS
5 SUMSS J202406-720922 20 24 06.70 -72 09 23.04 13.88 SUMSS
GLEAM J202409-720926 20 24 09.50 -72 09 27.00 13.95 GLEAMEGCAT

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