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.

3FGL J2250.6+3308

Field

Detected Excesses
Swift-XRT image of the field for 3FGL J2250.6+3308 Swift-XRT detections in the field for 3FGL J2250.6+3308

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 22 51 04.03 +32 59 15.93 5.49 (7 ± 2) x 10-3 26 4.510 4.455
2 22 50 45.65 +33 05 14.88 6.21 (6 ± 2) x 10-3 19 3.726 4.038

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 25.99 +33 04 23.19 6.65 (3.2 ± 1.1) x 10-3 14 2.901 2.896
2 22 50 41.85 +33 10 44.39 7.48 (3.2 ± 1.1) x 10-3 11 2.674 2.878
3 22 51 08.50 +33 04 54.38 6.93 (2.6 ± 1.0) x 10-3 11 2.503 2.560
4 22 50 29.93 +33 10 32.33 6.93 (2.6 ± 1.0) x 10-3 15 2.472 2.520

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 3FGL J2250.6+3308 Swift-XRT image with known radio, optical and UV sources for 3FGL J2250.6+3308

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 10.45 ROSAT
2RXS J225105.1+325916 22 51 05.11 +32 59 16.80 10.48 ROSAT
2RXS J225105.1+325916 22 51 05.11 +32 59 16.80 10.48 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 5.88 NVSS
2 NVSS J225027+331513 22 50 27.60 +33 15 14.04 7.32 NVSS
3 NVSS J225117+331211 22 51 17.81 +33 12 11.16 8.42 NVSS
4 NVSS J225124+330739 22 51 24.60 +33 07 40.08 9.04 NVSS
5 NVSS J225036+325835 22 50 36.60 +32 58 36.12 9.98 NVSS
6 NVSS J225132+330953 22 51 32.30 +33 09 54.00 10.71 NVSS
TGSSADR J225130.9+331239 22 51 30.91 +33 12 39.96 11.13 GMRTAS150M
7 NVSS J225131+331242 22 51 31.01 +33 12 42.12 11.17 NVSS
WN 2249.1+3257 22 51 31.51 +33 12 57.96 11.35 WENSS
8 NVSS J225110+331817 22 51 10.61 +33 18 16.92 11.50 NVSS
9 NVSS J225037+332019 22 50 37.61 +33 20 18.96 11.83 NVSS
TGSSADR J225132.8+331333 22 51 32.81 +33 13 32.88 11.85 GMRTAS150M
10 NVSS J225024+331950 22 50 24.50 +33 19 50.88 11.87 NVSS
11 NVSS J225132+331336 22 51 32.90 +33 13 36.84 11.89 NVSS
WN 2247.5+3303 22 49 54.19 +33 18 54.00 14.35 WENSS
12 NVSS J224954+331857 22 49 54.19 +33 18 56.88 14.39 NVSS

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