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.

4FGL J2357.8+6839

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J2357.8+6839 Swift-XRT detections in the field for 4FGL J2357.8+6839


No detected excesses found.

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J2357.8+6839 Swift-XRT image with known radio, optical and UV sources for 4FGL J2357.8+6839


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 J235813+683559 23 58 13.01 +68 35 58.92 4.11 NVSS
QORG J235847.4+683602 23 58 47.40 +68 36 02.16 6.10 QORGCAT
2 NVSS J235847+683601 23 58 47.50 +68 36 01.08 6.12 NVSS
WN 2356.3+6819 23 58 52.10 +68 36 14.04 6.34 WENSS
3 NVSS J235900+683628 23 59 00.91 +68 36 28.08 6.91 NVSS
4 NVSS J235734+684809 23 57 34.30 +68 48 09.00 8.63 NVSS
5 NVSS J235720+683037 23 57 20.59 +68 30 38.16 9.57 NVSS
WN 2354.7+6813B 23 57 19.39 +68 30 38.16 9.61 WENSS
6 WN 2354.7+6813 23 57 14.30 +68 30 23.04 10.00 WENSS
7 NVSS J235859+684804 23 58 59.40 +68 48 03.96 10.26 NVSS
QORG J235900.4+684804 23 59 00.41 +68 48 03.96 10.31 QORGCAT
8 NVSS J235616+684550 23 56 16.20 +68 45 51.12 10.79 NVSS
WN 2353.7+6829 23 56 16.10 +68 45 55.08 10.83 WENSS
WN 2354.7+6813A 23 57 01.01 +68 29 48.12 11.02 WENSS
9 NVSS J235700+682936 23 57 00.60 +68 29 35.88 11.21 NVSS
10 HIP 118142 23 57 49.75 +68 28 28.56 11.23 HIPPARCOS
BD +67 1581 23 57 49.80 +68 28 28.56 11.24 HIC
11 NVSS J235719+682744 23 57 19.61 +68 27 43.92 12.36 NVSS
WN 2354.8+6811 23 57 19.10 +68 27 42.84 12.41 WENSS

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