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 J1757.8-3126

Field

Detected Excesses
Swift-XRT image of the field for 3FGL J1757.8-3126 Swift-XRT detections in the field for 3FGL J1757.8-3126

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 17 57 31.63 -31 34 40.90 5.44 (9 ± 2) x 10-3 27 4.601 4.418

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 17 57 32.98 -31 36 21.44 6.93 (3.6 ± 1.4) x 10-3 11 2.304 2.451
2 17 58 00.97 -31 29 11.61 6.31 (3.1 ± 1.4) x 10-3 15 2.550 2.230

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 3FGL J1757.8-3126 Swift-XRT image with known radio, optical and UV sources for 3FGL J1757.8-3126

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J175736.4-312225 17 57 36.43 -31 22 25.68 5.55 ROSAT
1RXS J175736.4-312225 17 57 36.41 -31 22 24.96 5.56 ROSAT
2 2RXS J175716.5-312901 17 57 16.54 -31 29 01.32 8.04 ROSAT
3 1RXS J175847.7-313834 17 58 47.69 -31 38 34.44 16.65 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J175803-313101 17 58 03.89 -31 31 00.84 4.89 NVSS
2 NVSS J175808-313056 17 58 08.69 -31 30 56.16 5.40 NVSS
TGSSADR J175801.7-313343 17 58 01.70 -31 33 43.92 7.24 GMRTAS150M
3 NVSS J175801-313346 17 58 01.70 -31 33 46.08 7.28 NVSS
4 NVSS J175827-312533 17 58 27.31 -31 25 32.88 7.48 NVSS
MGPS J175827-312532 17 58 27.50 -31 25 32.88 7.51 MGPS2
TGSSADR J175827.4-312528 17 58 27.50 -31 25 27.84 7.52 GMRTAS150M
5 W27 17 57 56.90 -31 36 15.84 9.56 DIXON
6 TXS 1754-312 17 57 51.19 -31 16 54.12 9.85 TEXAS
7 NVSS J175721-313457 17 57 21.10 -31 34 58.08 10.63 NVSS
8 NVSS J175754-311501 17 57 54.79 -31 15 02.16 11.73 NVSS
TGSSADR J175754.8-311500 17 57 54.91 -31 15 01.08 11.74 GMRTAS150M
MGPS J175754-311459 17 57 54.70 -31 15 00.00 11.76 MGPS2
9 NVSS J175720-311541 17 57 20.59 -31 15 41.04 13.02 NVSS

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