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 J2250.5+3305

Field

Detected Excesses

Swift-XRT image of the field for 4FGL J2250.5+3305 Swift-XRT detections in the field for 4FGL J2250.5+3305

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 22 51 04.16 +32 59 14.15 5.70 (8 ± 2) x 10-3 22 4.279 4.112
2 22 50 45.52 +33 05 16.02 6.78 (6 ± 2) x 10-3 14 3.291 3.350

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 22 51 25.36 +33 04 25.21 7.48 (3.4 ± 1.3) x 10-3 10 2.594 2.591

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 4FGL J2250.5+3305 Swift-XRT image with known radio, optical and UV sources for 4FGL J2250.5+3305

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1RXS J225105.1+325918 22 51 05.11 +32 59 18.60 9.34 ROSAT
2RXS J225105.1+325916 22 51 05.11 +32 59 16.80 9.36 ROSAT
2RXS J225105.1+325916 22 51 05.11 +32 59 16.80 9.36 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J225020+330432 22 50 21.00 +33 04 32.16 3.02 NVSS
2 NVSS J225036+325835 22 50 36.60 +32 58 36.12 7.37 NVSS
3 WDS J22505+3258 22 50 30.00 +32 58 00.12 7.97 WDS
4 NVSS J225027+331513 22 50 27.60 +33 15 14.04 9.38 NVSS
5 PGC 2027459 22 50 16.20 +33 14 49.92 9.62 PGC2003
6 NVSS J225124+330739 22 51 24.60 +33 07 40.08 10.79 NVSS
7 NVSS J225117+331211 22 51 17.81 +33 12 11.16 11.15 NVSS
TGSSADR J225130.9+331239 22 51 30.91 +33 12 39.96 13.74 GMRTAS150M
8 NVSS J224944+325628 22 49 44.90 +32 56 29.04 13.93 NVSS
WN 2247.3+3240 22 49 44.50 +32 56 26.16 14.01 WENSS
9 NVSS J224937+331445 22 49 37.70 +33 14 44.88 14.67 NVSS

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