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 J0226.9+7744

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J0226.9+7744 Swift-XRT detections in the field for 4FGL J0226.9+7744

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 02 26 03.13 +77 53 34.63 6.12 (3.9 ± 1.2) x 10-3 16 3.333 3.342

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 02 29 50.24 +77 52 34.48 5.96 (1.8 ± 0.8) x 10-3 14 2.438 2.230
2 02 28 58.23 +77 55 50.07 5.40 (1.5 ± 0.9) x 10-3 11 2.396 1.736

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J0226.9+7744 Swift-XRT image with known radio, optical and UV sources for 4FGL J0226.9+7744

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J022558.1+775419 02 25 58.15 +77 54 19.08 10.41 ROSAT
2RXS J022558.1+775419 02 25 58.15 +77 54 19.08 10.41 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J022624+774445 02 26 24.79 +77 44 45.96 1.84 NVSS
WN 0221.7+7728 02 27 15.91 +77 41 48.84 2.76 WENSS
2 NVSS J022717+774125 02 27 17.71 +77 41 25.08 3.15 NVSS
3 NVSS J022723+774831 02 27 23.40 +77 48 30.96 4.31 NVSS
WN 0221.8+7735 02 27 27.00 +77 48 33.84 4.41 WENSS
0223+7729L 02 29 11.21 +77 43 10.92 7.13 NORTH20CM
VLSSr J022911.9+774319 02 29 12.00 +77 43 19.92 7.15 VLSSR
4 NB77.03 02 29 05.59 +77 41 48.84 7.22 DIXON
QORG J022913.6+774320 02 29 13.61 +77 43 19.92 7.24 QORGCAT
5 NVSS J022914+774316 02 29 14.71 +77 43 17.04 7.30 NVSS
WN 0223.6+7729 02 29 14.71 +77 43 15.96 7.31 WENSS
TGSSADR J022914.8+774317 02 29 14.81 +77 43 17.04 7.31 GMRTAS150M
8C 0223+774 02 29 17.21 +77 43 21.00 7.42 RRS8C38MHZ
6 4C+77.03 02 29 13.90 +77 41 30.12 7.75 DIXON
QORG J022603.3+775333 02 26 03.31 +77 53 33.00 9.60 QORGCAT
7 NVSS J022603+775334 02 26 03.19 +77 53 35.16 9.63 NVSS
WN 0220.4+7740 02 26 02.21 +77 53 38.04 9.69 WENSS
8 NVSS J022936+774950 02 29 36.60 +77 49 50.88 9.96 NVSS
PGC 2774865 02 29 36.60 +77 49 58.08 10.02 PGC2003
9 NVSS J022337+774744 02 23 37.10 +77 47 44.16 11.20 NVSS
WN 0223.7+7722 02 29 18.50 +77 36 02.16 11.21 WENSS
QORG J022336.6+774746 02 23 36.60 +77 47 45.96 11.23 QORGCAT
10 NVSS J022919+773601 02 29 19.20 +77 36 02.16 11.24 NVSS
WN 0218.0+7734B 02 23 34.61 +77 47 48.12 11.34 WENSS
WN 0218.0+7734 02 23 32.50 +77 48 10.08 11.55 WENSS
11 NVSS J022356+773800 02 23 56.59 +77 37 59.88 11.64 NVSS
WN 0218.0+7734A 02 23 26.40 +77 49 17.04 12.25 WENSS
12 NVSS J022326+774922 02 23 26.81 +77 49 22.08 12.27 NVSS
13 NVSS J022920+773332 02 29 20.11 +77 33 33.12 13.24 NVSS
TGSSADR J022921.9+773332 02 29 21.91 +77 33 33.12 13.29 GMRTAS150M
WN 0223.8+7720 02 29 21.79 +77 33 32.04 13.30 WENSS

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