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.

2FGL J1639.8-5145

Field

Detected Excesses

Swift-XRT image of the field for 2FGL J1639.8-5145 Swift-XRT detections in the field for 2FGL J1639.8-5145

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 16 39 26.15 -51 49 32.62 4.48 (8.9 ± 1.3) x 10-3 64 6.461 6.787
2 16 39 47.48 -51 59 47.42 4.30 (7.8 ± 1.2) x 10-3 72 7.742 6.278

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 10.40 -51 37 02.93 5.89 (1.5 ± 0.6) x 10-3 11 2.550 2.531
2 16 39 19.76 -51 56 51.83 5.05 (1.8 ± 0.7) x 10-3 16 2.760 2.524
3 16 39 14.05 -51 47 24.36 5.02 (1.7 ± 0.7) x 10-3 23 2.713 2.258

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 2FGL J1639.8-5145 Swift-XRT image with known radio, optical and UV sources for 2FGL J1639.8-5145

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 11.00 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 3.83 GMRTAS150M
2 MGPS J164020-514153 16 40 20.90 -51 41 53.16 6.46 MGPS2
3 TGSSADR J163906.9-514853 16 39 07.01 -51 48 54.00 7.05 GMRTAS150M
MGPS J163906-514857 16 39 06.89 -51 48 56.88 7.07 MGPS2
4 PMN J1639-5150 16 39 10.90 -51 50 24.00 7.32 PMN
5 MGPS J163922-513851 16 39 22.39 -51 38 52.08 8.10 MGPS2
6 TGSSADR J164017.6-513651 16 40 17.71 -51 36 51.12 10.13 GMRTAS150M
MGPS J164017-513651 16 40 17.71 -51 36 51.12 10.14 MGPS2
7 MGPS J164050-513407 16 40 50.11 -51 34 08.04 15.18 MGPS2
TGSSADR J164050.0-513402 16 40 50.11 -51 34 03.00 15.25 GMRTAS150M

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