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 J1937.1-0444

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1937.1-0444 Swift-XRT detections in the field for 4FGL J1937.1-0444

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 19 36 49.62 -04 49 33.00 6.52 (2.9 ± 0.9) x 10-3 16 3.109 3.140

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 19 37 34.48 -04 40 34.98 5.96 (2.3 ± 0.9) x 10-3 11 2.666 2.506
2 19 36 33.60 -04 46 44.85 6.65 (2.0 ± 0.9) x 10-3 8 2.538 2.279
3 19 37 47.29 -04 38 53.30 6.31 (1.5 ± 0.7) x 10-3 14 2.260 2.116

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1937.1-0444 Swift-XRT image with known radio, optical and UV sources for 4FGL J1937.1-0444

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 HD 185124 19 37 47.33 -04 38 51.36 11.32 ROSAT
42 AQL 19 37 47.30 -04 38 51.00 11.32 ROSAT
2RXS J193748.0-043854 19 37 48.07 -04 38 54.24 11.45 ROSAT
1RXS J193748.2-043852 19 37 48.19 -04 38 52.44 11.50 ROSAT
1RXS J193748.2-043852 19 37 48.19 -04 38 52.08 11.50 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J193703-044401 19 37 03.50 -04 44 00.96 1.38 NVSS
2 NVSS J193715-044457 19 37 15.79 -04 44 57.84 1.89 NVSS
3 NVSS J193737-044321 19 37 37.61 -04 43 21.00 7.41 NVSS
4 GLEAM J193739-044354 19 37 39.19 -04 43 54.12 7.74 GLEAMEGCAT
5 BD-05 5021 19 36 34.13 -04 46 18.48 8.68 ACRS
PPM 203082 19 36 34.10 -04 46 18.12 8.69 PPM
HIP 96451 19 36 34.08 -04 46 18.12 8.69 HIPPARCOS
HD 184858 19 36 34.08 -04 46 18.48 8.69 HIC
SAO 143593 19 36 34.03 -04 46 19.20 8.71 SAO
6 NVSS J193744-044359 19 37 44.30 -04 43 59.16 8.98 NVSS
7 PPM 203089 19 37 10.08 -04 33 27.00 11.23 PPM
BD-04 4858 19 37 10.08 -04 33 26.64 11.24 ACRS
SAO 143603 19 37 10.03 -04 33 26.64 11.24 SAO
8 HIP 96556 19 37 47.26 -04 38 51.00 11.31 HIPPARCOS
SAO 143621 19 37 47.30 -04 38 51.36 11.32 SAO
HR 7460 19 37 47.30 -04 38 51.00 11.32 BSC5P
HD 185124 19 37 47.33 -04 38 51.36 11.32 HIC
BD-04 4861 19 37 47.35 -04 38 51.72 11.32 ACRS
PPM 203110 19 37 47.33 -04 38 51.36 11.32 PPM
WDS J19378-0439 19 37 48.00 -04 39 00.00 11.39 WDS
9 NVSS J193739-043355 19 37 39.91 -04 33 56.16 13.32 NVSS
10 PPM 203083 19 36 40.27 -04 33 07.92 13.50 PPM
BD-04 4853 19 36 40.27 -04 33 07.92 13.50 ACRS
SAO 143594 19 36 40.22 -04 33 07.56 13.51 SAO
TGSSADR J193625.1-045508 19 36 25.20 -04 55 08.04 15.00 GMRTAS150M
11 NVSS J193625-045509 19 36 25.10 -04 55 09.12 15.03 NVSS
12 WDS J19365-0433 19 36 30.00 -04 32 60.00 15.09 WDS

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