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.

1FGL J2250.8+6336

Field

Detected Excesses

Swift-XRT image of the field for 1FGL J2250.8+6336 Swift-XRT detections in the field for 1FGL J2250.8+6336

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 22 50 39.83 +63 28 37.14 3.64 (1.49 ± 0.06) x 10-1 597 25.640 23.150
2 22 52 05.69 +63 34 22.04 6.41 (4.2 ± 1.1) x 10-3 17 3.712 3.731
3 22 50 13.47 +63 45 16.33 6.65 (3.4 ± 1.0) x 10-3 13 3.369 3.274
4 22 49 23.43 +63 32 12.74 6.12 (3.3 ± 1.0) x 10-3 17 3.427 3.241

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 50 57.55 +63 29 32.83 5.96 (2.1 ± 0.9) x 10-3 13 2.754 2.307

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 1FGL J2250.8+6336 Swift-XRT image with known radio, optical and UV sources for 1FGL J2250.8+6336

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 3XMM J225041.1+633615 22 50 41.18 +63 36 15.48 1.44 XMM-NEWTON
2 3XMM J225038.0+634117 22 50 38.50 +63 41 17.52 4.68 XMM-NEWTON
3 3XMM J225126.0+633214 22 51 26.30 +63 32 14.28 5.95 XMM-NEWTON
4 3XMM J225039.5+632923 22 50 39.58 +63 29 23.28 7.66 XMM-NEWTON
5 3XMM J225040.0+632838 22 50 40.30 +63 28 38.28 8.39 XMM-NEWTON
2RXS J225039.8+632835 22 50 39.82 +63 28 35.04 8.44 ROSAT
6 3XMM J225205.5+633421 22 52 05.59 +63 34 22.08 8.48 XMM-NEWTON
1RXS J225039.9+632832 22 50 39.89 +63 28 32.52 8.49 ROSAT
7 3XMM J225052.0+632824 22 50 52.20 +63 28 24.96 8.49 XMM-NEWTON
1RXS J225039.9+632832 22 50 39.89 +63 28 32.16 8.50 ROSAT
8 3XMM J225009.2+632950 22 50 09.26 +63 29 50.28 8.57 XMM-NEWTON
9 1RXS J225017.7+634515 22 50 17.69 +63 45 15.12 9.21 ROSAT
10 3XMM J225058.7+632723 22 50 58.73 +63 27 23.40 9.54 XMM-NEWTON
11 3XMM J225156.6+632959 22 51 56.64 +63 29 58.92 9.92 XMM-NEWTON
12 1WGA J2250.8+6326 22 50 48.19 +63 26 51.72 10.06 ROSAT
13 3XMM J225008.9+632720 22 50 08.90 +63 27 20.88 10.74 XMM-NEWTON
14 2RXP J225057.2+632554 22 50 57.14 +63 25 54.48 11.01 ROSAT
15 3XMM J224944.8+632521 22 49 44.83 +63 25 21.36 13.81 XMM-NEWTON
16 3XMM J224913.4+632816 22 49 13.44 +63 28 16.32 14.04 XMM-NEWTON
17 3XMM J225224.8+632642 22 52 24.84 +63 26 42.36 14.47 XMM-NEWTON

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 CGPS J225138+633731 22 51 38.50 +63 37 32.16 5.11 CGPSNGPCAT
2 NVSS J224937+633307 22 49 37.10 +63 33 06.84 9.23 NVSS
CGPS J224936+633307 22 49 36.10 +63 33 06.84 9.33 CGPSNGPCAT
3 CGPS J225120+632757 22 51 20.30 +63 27 56.88 9.46 CGPSNGPCAT
4 CGPS J224936+632950 22 49 36.00 +63 29 51.00 11.09 CGPSNGPCAT
5 CGPS J224909+633243 22 49 09.19 +63 32 43.08 12.26 CGPSNGPCAT
6 NVSS J225218+634639 22 52 18.79 +63 46 40.08 13.64 NVSS
CGPS J225219+634639 22 52 19.20 +63 46 40.08 13.66 CGPSNGPCAT
7 NVSS J224912+632813 22 49 12.10 +63 28 13.08 14.19 NVSS
8 NVSS J224929+634819 22 49 29.11 +63 48 19.08 14.71 NVSS

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