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 J1740.8-1933


Detected Excesses

Swift-XRT image of the field for 3FGL J1740.8-1933 Swift-XRT detections in the field for 3FGL J1740.8-1933

No detected excesses found.

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 40 11.79 -19 31 34.67 5.76 (3.1 ± 1.2) x 10-3 16 2.662 2.496
2 17 40 05.71 -19 36 36.06 5.76 (1.9 ± 1.1) x 10-3 12 2.675 1.756

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 3FGL J1740.8-1933 Swift-XRT image with known radio, optical and UV sources for 3FGL J1740.8-1933

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 NVSS J174051-193011 17 40 51.79 -19 30 11.88 3.72 NVSS
2 NVSS J174105-193006 17 41 05.81 -19 30 06.12 5.16 NVSS
TGSSADR J174120.3-192741 17 41 20.40 -19 27 42.12 9.30 GMRTAS150M
3 NVSS J174120-192741 17 41 20.40 -19 27 41.04 9.32 NVSS

Penn State University Goddard Space Flight Center Swift