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.

2FGL J0418.9+6636

Field

Detected Excesses

Swift-XRT image of the field for 2FGL J0418.9+6636 Swift-XRT detections in the field for 2FGL J0418.9+6636

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 04 20 48.74 +66 33 41.62 6.31 (4.0 ± 1.2) x 10-3 16 3.453 3.453

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 04 20 41.07 +66 38 50.19 6.93 (2.3 ± 0.9) x 10-3 11 2.513 2.537
2 04 19 15.61 +66 49 27.38 6.93 (1.8 ± 0.9) x 10-3 7 2.167 2.121

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 2FGL J0418.9+6636 Swift-XRT image with known radio, optical and UV sources for 2FGL J0418.9+6636

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J041914.4+664100 04 19 14.40 +66 40 59.88 5.02 ROSAT
2 1RXS J042049.0+663353 04 20 49.01 +66 33 52.92 11.14 ROSAT
2RXS J042049.1+663352 04 20 49.18 +66 33 52.56 11.15 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J041903+663454 04 19 03.91 +66 34 54.84 1.37 NVSS
[SPT2015] VLA J0419+6634 04 19 02.09 +66 34 37.92 1.60 FER2FUSRID
2 [SPT2015] VLA J0418+663A 04 18 54.41 +66 39 36.00 3.43 FER2FUSRID
3 [SPT2015] VLA J0418+6636 04 18 21.50 +66 36 57.96 3.83 FER2FUSRID
4 NVSS J041935+663759 04 19 35.90 +66 37 59.88 4.04 NVSS
5 [SPT2015] VLA J0418+6639 04 18 30.70 +66 39 30.96 4.36 FER2FUSRID
6 NVSS J041915+664100 04 19 15.10 +66 41 00.96 5.05 NVSS
WN 0414.8+6632 04 19 43.99 +66 39 38.16 5.59 WENSS
7 NVSS J041946+663934 04 19 46.61 +66 39 33.84 5.77 NVSS
8 NVSS J041959+663754 04 19 59.81 +66 37 54.12 6.23 NVSS
9 NVSS J041733+663258 04 17 33.00 +66 32 57.84 9.17 NVSS
10 NVSS J042030+662950 04 20 30.91 +66 29 49.92 11.11 NVSS

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