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 J0637.5+0418

Field

Detected Excesses
Swift-XRT image of the field for 3FGL J0637.5+0418 Swift-XRT detections in the field for 3FGL J0637.5+0418

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 06 37 58.12 +04 15 30.30 4.95 (2.2 ± 0.5) x 10-3 33 4.498 4.384
2 06 38 09.72 +04 11 27.05 6.65 (1.5 ± 0.5) x 10-3 13 3.184 3.339
3 06 37 45.83 +04 18 47.28 5.31 (1.4 ± 0.4) x 10-3 30 3.321 3.129

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 06 37 24.47 +04 25 16.27 5.70 (8 ± 3) x 10-4 18 2.780 2.439

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 3FGL J0637.5+0418 Swift-XRT image with known radio, optical and UV sources for 3FGL J0637.5+0418

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1WGA J0637.2+0418 06 37 16.61 +04 18 16.92 3.90 ROSAT
2 2RXP J063756.2+041531 06 37 56.18 +04 15 30.96 6.91 ROSAT
3 1WGA J0637.9+0415 06 37 58.39 +04 15 24.84 7.44 ROSAT
4 2RXP J063655.4+040912 06 36 55.39 +04 09 11.88 13.33 ROSAT
1WGA J0636.9+0409 06 36 55.01 +04 09 12.96 13.38 ROSAT
5 1WGA J0636.8+0409 06 36 53.21 +04 09 23.04 13.58 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 PMN J0637+0416 06 37 19.70 +04 16 27.84 3.92 PMN
2 NVSS J063708+041502 06 37 08.81 +04 15 02.88 6.97 NVSS
TGSSADR J063708.5+041502 06 37 08.50 +04 15 02.88 7.02 GMRTAS150M
[PME2013] J0637+0414 06 37 08.59 +04 14 58.92 7.03 AT2FGLUS
[SPT2015] VLA J0637+0414 06 37 07.99 +04 14 57.12 7.18 FER2FUSRID
3 NVSS J063711+041324 06 37 11.71 +04 13 23.88 7.47 NVSS
4 NVSS J063731+042635 06 37 31.20 +04 26 35.16 7.69 NVSS
5 PMN J0637+0414 06 37 05.40 +04 14 45.96 7.82 PMN
6 NVSS J063806+041719 06 38 06.10 +04 17 20.04 8.64 NVSS
7 NVSS J063746+042730 06 37 46.20 +04 27 29.88 9.30 NVSS
8 PMN J0636+0419 06 36 48.10 +04 19 41.16 10.98 PMN
9 NVSS J063646+041548 06 36 46.39 +04 15 47.88 11.80 NVSS
TGSSADR J063809.5+041131 06 38 09.50 +04 11 31.92 11.90 GMRTAS150M
10 NVSS J063809+041129 06 38 09.41 +04 11 29.04 11.90 NVSS
11 GB6 J0638+0410 06 38 07.01 +04 10 27.84 12.13 GB6
12 NVSS J063756+040810 06 37 56.59 +04 08 09.96 12.36 NVSS

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