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 J0257.8+7044

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J0257.8+7044 Swift-XRT detections in the field for 4FGL J0257.8+7044


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 J0257.8+7044 Swift-XRT image with known radio, optical and UV sources for 4FGL J0257.8+7044


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 J025659+704532 02 56 59.81 +70 45 32.04 4.34 NVSS
2 NVSS J025633+704516 02 56 33.31 +70 45 16.92 6.45 NVSS
3 PPM 5143 02 58 13.94 +70 36 46.08 8.01 PPM
BD+70 216 02 58 13.80 +70 36 45.72 8.01 ACRS
SAO 4785 02 58 13.90 +70 36 43.92 8.05 SAO
4 NVSS J025748+705436 02 57 49.01 +70 54 36.00 10.06 NVSS
GB6 J0257+7054 02 57 48.41 +70 54 47.16 10.24 GB6
WN 0254.7+7025 02 59 28.10 +70 37 33.96 10.64 WENSS
TGSSADR J025929.8+703743 02 59 29.90 +70 37 44.04 10.64 GMRTAS150M
5 NVSS J025929+703737 02 59 29.21 +70 37 36.84 10.67 NVSS
WN 0252.1+7023 02 56 49.90 +70 35 07.08 10.71 WENSS
TGSSADR J025650.4+703505 02 56 50.50 +70 35 04.92 10.71 GMRTAS150M
6 NVSS J025650+703504 02 56 50.50 +70 35 03.84 10.72 NVSS
7 NVSS J025547+704951 02 55 47.11 +70 49 50.88 11.49 NVSS
8 30-321 03 00 12.31 +70 48 19.44 12.22 NLTT
QORG J025532.4+703442 02 55 32.40 +70 34 41.88 15.13 QORGCAT
9 NVSS J025532+703441 02 55 32.21 +70 34 41.16 15.15 NVSS
10 NVSS J025529+703333 02 55 29.50 +70 33 33.84 16.07 NVSS
TGSSADR J025530.1+703321 02 55 30.10 +70 33 21.96 16.17 GMRTAS150M

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