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 J2220.6-6833

Field

Detected Excesses

Swift-XRT image of the field for 3FGL J2220.6-6833 Swift-XRT detections in the field for 3FGL J2220.6-6833

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 22 19 22.78 -68 27 36.53 5.24 (8 ± 2) x 10-3 24 4.562 4.042

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 22 19 24.55 -68 34 09.00 6.41 (2.2 ± 1.2) x 10-3 10 2.470 1.805

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 3FGL J2220.6-6833 Swift-XRT image with known radio, optical and UV sources for 3FGL J2220.6-6833


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 J221950-682943 22 19 50.21 -68 29 44.16 5.49 SUMSS
GLEAM J221947-682918 22 19 47.90 -68 29 17.88 5.94 GLEAMEGCAT
2 SUMSS J221942-682816 22 19 42.19 -68 28 17.04 7.02 SUMSS
3 SUMSS J222138-683754 22 21 38.59 -68 37 54.12 7.35 SUMSS
4 SUMSS J222210-683146 22 22 10.99 -68 31 45.84 8.80 SUMSS
5 SUMSS J222131-682236 22 21 31.20 -68 22 36.84 11.80 SUMSS
GLEAM J222129-682222 22 21 29.81 -68 22 23.16 11.95 GLEAMEGCAT
6 SUMSS J222129-684451 22 21 29.50 -68 44 52.08 12.57 SUMSS

Penn State University Goddard Space Flight Center Swift