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 J1639.4-5146

Field

Detected Excesses

Swift-XRT image of the field for 3FGL J1639.4-5146 Swift-XRT detections in the field for 3FGL J1639.4-5146

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 16 39 47.33 -51 59 45.38 4.23 (8.9 ± 1.3) x 10-3 81 8.408 7.080
2 16 39 26.30 -51 49 32.85 4.48 (8.0 ± 1.3) x 10-3 66 6.456 6.422

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 16 39 08.64 -51 46 23.38 4.95 (2.1 ± 0.7) x 10-3 31 2.570 2.851
2 16 38 41.20 -51 48 53.72 5.02 (1.8 ± 0.7) x 10-3 20 2.606 2.655

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 3FGL J1639.4-5146 Swift-XRT image with known radio, optical and UV sources for 3FGL J1639.4-5146

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2EG J1648-5042 16 39 00.00 -51 53 60.00 8.52 INTEGRAL

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 TGSSADR J163923.8-514634 16 39 23.81 -51 46 33.96 0.77 GMRTAS150M
2 TGSSADR J163906.9-514853 16 39 07.01 -51 48 54.00 4.00 GMRTAS150M
MGPS J163906-514857 16 39 06.89 -51 48 56.88 4.03 MGPS2
3 PMN J1639-5150 16 39 10.90 -51 50 24.00 4.59 PMN
4 MGPS J163922-513851 16 39 22.39 -51 38 52.08 7.93 MGPS2
5 MGPS J164020-514153 16 40 20.90 -51 41 53.16 9.43 MGPS2
6 MGPS J163921-515833 16 39 21.70 -51 58 33.96 11.88 MGPS2
7 TGSSADR J164017.6-513651 16 40 17.71 -51 36 51.12 12.45 GMRTAS150M
MGPS J164017-513651 16 40 17.71 -51 36 51.12 12.46 MGPS2

Penn State University Goddard Space Flight Center Swift