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 J1737.2-2421

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1737.2-2421 Swift-XRT detections in the field for 4FGL J1737.2-2421

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 17 37 21.71 -24 23 01.02 5.70 (2.7 ± 0.7) x 10-2 23 4.409 4.159

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1737.2-2421 Swift-XRT image with known radio, optical and UV sources for 4FGL J1737.2-2421


No known X-ray or gamma ray sources found.

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J173716-242128 17 37 16.51 -24 21 28.08 0.77 NVSS
TGSSADR J173721.1-242304 17 37 21.10 -24 23 03.84 1.97 GMRTAS150M
2 NVSS J173721-242303 17 37 21.19 -24 23 03.84 1.98 NVSS
3 NVSS J173727-242202 17 37 27.60 -24 22 03.00 3.13 NVSS
4 V2221 Oph 17 37 04.46 -24 15 27.36 6.87 GCVS
5 NVSS J173643-242118 17 36 43.61 -24 21 18.00 6.93 NVSS
6 NVSS J173645-242847 17 36 45.00 -24 28 46.92 9.47 NVSS
7 NVSS J173750-242748 17 37 50.40 -24 27 47.88 10.13 NVSS
8 V2222 Oph 17 37 34.34 -24 12 57.60 10.15 GCVS
9 NSV 9249 17 37 12.60 -24 11 27.96 10.52 GCVSNSVARS
10 SAO 185553 17 37 19.92 -24 33 52.92 11.98 SAO
CD-2413401 17 37 19.87 -24 33 54.00 12.00 ACRS
PPM 267072 17 37 19.90 -24 33 54.00 12.00 PPM
11 V2223 Oph 17 38 00.84 -24 15 50.04 12.33 GCVS
12 NVSS J173744-243213 17 37 44.81 -24 32 12.84 12.42 NVSS
13 NSV 9283 17 37 57.70 -24 14 12.84 12.64 GCVSNSVARS
14 NSV 9292 17 38 05.71 -24 15 24.12 13.51 GCVSNSVARS
15 NSV 9212 17 36 23.71 -24 14 38.04 13.60 GCVSNSVARS
16 NVSS J173742-241001 17 37 42.41 -24 10 00.84 13.61 NVSS
17 NSV 9225 17 36 38.59 -24 10 00.84 14.42 GCVSNSVARS
18 NVSS J173803-243243 17 38 03.29 -24 32 44.16 15.54 NVSS

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