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 J1639.3-5146

Field

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

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 16 39 47.39 -51 59 46.14 4.23 (9.4 ± 1.3) x 10-3 81 8.379 7.320
2 16 39 26.27 -51 49 32.98 4.48 (8.2 ± 1.2) x 10-3 65 6.454 6.617

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 19.17 -51 56 40.62 5.14 (1.7 ± 0.7) x 10-3 12 2.763 2.533
2 16 39 10.38 -51 37 03.26 5.96 (1.3 ± 0.5) x 10-3 12 2.450 2.458

X-Ray and Gamma Ray Catalogs

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

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 8.65 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 0.43 GMRTAS150M
2 SAO 244035 16 39 26.35 -51 49 34.32 3.45 SAO
PPM 345272 16 39 26.40 -51 49 34.32 3.46 PPM
CD-5110385 16 39 26.40 -51 49 34.68 3.46 ACRS
3 TGSSADR J163906.9-514853 16 39 07.01 -51 48 54.00 3.76 GMRTAS150M
MGPS J163906-514857 16 39 06.89 -51 48 56.88 3.80 MGPS2
4 PMN J1639-5150 16 39 10.90 -51 50 24.00 4.68 PMN
5 MGPS J163922-513851 16 39 22.39 -51 38 52.08 7.29 MGPS2
6 SAO 244034 16 39 26.64 -51 54 49.32 8.69 SAO
Rns 42370 16 39 26.59 -51 54 49.68 8.69 CPSTARS
PPM 345273 16 39 26.57 -51 54 50.04 8.70 PPM
7 SAO 244016 16 38 29.81 -51 50 35.52 9.42 SAO
PPM 345254 16 38 29.76 -51 50 35.52 9.42 PPM
8 MGPS J164020-514153 16 40 20.90 -51 41 53.16 9.86 MGPS2
9 PPM 772484 16 38 42.46 -51 36 07.56 11.87 PPM
10 TGSSADR J164017.6-513651 16 40 17.71 -51 36 51.12 12.52 GMRTAS150M
MGPS J164017-513651 16 40 17.71 -51 36 51.12 12.53 MGPS2
11 CD-5110366 16 38 14.28 -51 53 21.48 12.90 ACRS
PPM 345248 16 38 14.28 -51 53 22.20 12.91 PPM
SAO 244012 16 38 14.16 -51 53 21.12 12.91 SAO

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