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 J1957.9-0712

Field

Detected Excesses
Swift-XRT image of the field for 3FGL J1957.9-0712 Swift-XRT detections in the field for 3FGL J1957.9-0712

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 19 58 01.82 -07 13 41.21 6.12 (6 ± 2) x 10-3 20 3.523 3.566

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 19 58 12.58 -07 10 40.53 6.31 (3.2 ± 1.2) x 10-3 12 2.762 2.640
2 19 58 28.77 -07 15 11.80 6.12 (2.7 ± 1.3) x 10-3 12 2.304 2.163

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 3FGL J1957.9-0712 Swift-XRT image with known radio, optical and UV sources for 3FGL J1957.9-0712


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 J195801-071348 19 58 01.90 -07 13 48.00 1.85 NVSS
2 NVSS J195751-070906 19 57 51.19 -07 09 06.84 3.74 NVSS
3 NVSS J195739-071048 19 57 39.79 -07 10 48.00 4.45 NVSS
4 NVSS J195734-071020 19 57 34.90 -07 10 19.92 5.75 NVSS
5 NVSS J195807-071752 19 58 07.20 -07 17 52.08 5.90 NVSS
6 NVSS J195812-071815 19 58 12.60 -07 18 15.12 6.93 NVSS
TGSSADR J195733.8-071651 19 57 33.91 -07 16 50.88 6.94 GMRTAS150M
7 NVSS J195745-070610 19 57 45.41 -07 06 10.08 7.00 NVSS
8 NVSS J195733-071657 19 57 33.60 -07 16 57.00 7.05 NVSS
9 NVSS J195722-071540 19 57 22.51 -07 15 39.96 8.86 NVSS
10 NVSS J195724-071723 19 57 24.50 -07 17 22.92 9.17 NVSS
11 NVSS J195814-070313 19 58 14.40 -07 03 12.96 10.47 NVSS
12 NVSS J195714-070707 19 57 14.40 -07 07 06.96 11.73 NVSS
13 NVSS J195839-070637 19 58 40.01 -07 06 37.08 12.44 NVSS
TGSSADR J195840.1-070635 19 58 40.20 -07 06 34.92 12.49 GMRTAS150M
GLEAM J195840-070639 19 58 40.80 -07 06 38.88 12.60 GLEAMEGCAT

Penn State University Goddard Space Flight Center Swift