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 J2237.2-6726

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J2237.2-6726 Swift-XRT detections in the field for 4FGL J2237.2-6726

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 22 37 09.31 -67 26 13.10 4.41 (3.0 ± 0.4) x 10-2 76 7.977 7.877

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 37 58.65 -67 35 41.37 5.44 (2.5 ± 1.2) x 10-3 15 2.410 2.119
2 22 37 05.48 -67 38 19.79 4.81 (7 ± 4) x 10-3 29 3.933 1.908
3 22 38 12.44 -67 36 51.40 4.80 (3 ± 2) x 10-3 29 3.891 1.876
4 22 37 30.79 -67 37 13.74 4.59 (2.4 ± 1.3) x 10-3 25 3.208 1.851
5 22 37 47.04 -67 37 37.05 4.81 (3 ± 2) x 10-3 23 2.971 1.839
6 22 37 55.97 -67 36 58.94 4.64 (2.4 ± 1.3) x 10-3 24 3.354 1.767
7 22 37 34.09 -67 37 32.12 4.71 (1.9 ± 1.3) x 10-3 20 2.805 1.468
8 22 37 44.69 -67 37 38.50 4.88 (1.7 ± 1.3) x 10-3 27 2.623 1.319
9 22 36 45.39 -67 37 24.96 5.05 (1.5 ± 1.1) x 10-3 16 2.684 1.274
10 22 38 12.44 -67 36 51.40 4.80 (1.4 ± 1.3) x 10-3 29 2.961 1.086
11 22 37 09.83 -67 37 44.92 4.48 (2 ± 2) x 10-3 23 2.964 0.944
12 22 37 09.82 -67 37 44.94 4.48 (1.1 ± 1.3) x 10-3 23 2.834 0.832

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J2237.2-6726 Swift-XRT image with known radio, optical and UV sources for 4FGL J2237.2-6726

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J223703.0-672632 22 37 03.07 -67 26 32.28 1.01 ROSAT
2RXS J223703.0-672632 22 37 03.07 -67 26 32.28 1.01 ROSAT
1RXS J223703.0-672632 22 37 03.00 -67 26 31.92 1.02 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 SUMSS J223709-672619 22 37 09.41 -67 26 18.96 0.37 SUMSS
2 PGC 295439 22 37 10.20 -67 27 05.04 0.92 PGC2003
3 PGC 296917 22 37 12.00 -67 19 18.12 6.91 PGC2003
4 PGC 296956 22 37 16.39 -67 19 00.12 7.22 PGC2003
5 PGC 294357 22 38 13.90 -67 32 44.16 8.75 PGC2003
6 PGC 295275 22 38 47.59 -67 27 59.04 9.24 PGC2003
7 PGC 297252 22 38 10.70 -67 17 24.00 10.41 PGC2003
8 PGC 297019 22 38 29.11 -67 18 42.12 10.48 PGC2003
9 PGC 297382 22 38 08.21 -67 16 49.08 10.79 PGC2003
10 R Ind 22 36 00.38 -67 17 16.08 11.35 GCVS
11 PGC 293632 22 38 07.10 -67 36 38.88 11.65 PGC2003
12 PGC 297491 22 38 56.81 -67 16 09.84 14.16 PGC2003
13 SPASS J223859-673750 22 38 59.90 -67 37 50.16 15.47 SPASS2P3GH

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