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 J1651.7-7241

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1651.7-7241 Swift-XRT detections in the field for 4FGL J1651.7-7241

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 16 51 51.92 -72 43 07.55 4.41 (1.6 ± 0.2) x 10-2 82 8.113 8.096
2 16 50 21.97 -72 37 24.82 4.88 (10 ± 2) x 10-3 42 5.747 5.687
3 16 53 22.33 -72 39 27.86 4.86 (7.3 ± 1.4) x 10-3 38 5.493 5.184
4 16 51 40.24 -72 46 37.40 4.81 (4.5 ± 1.3) x 10-3 28 3.898 3.527

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 16 51 44.03 -72 46 37.66 4.92 (2.7 ± 1.0) x 10-3 39 3.046 2.689
2 16 52 50.86 -72 41 35.85 5.89 (1.7 ± 0.8) x 10-3 16 2.432 2.157

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1651.7-7241 Swift-XRT image with known radio, optical and UV sources for 4FGL J1651.7-7241


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
QORG J165152.0-724307 16 51 52.01 -72 43 06.96 1.41 QORGCAT
1 SUMSS J165153-724305 16 51 53.59 -72 43 05.88 1.45 SUMSS
2 GLEAM J165138-724640 16 51 38.11 -72 46 41.16 4.90 GLEAMEGCAT
SUMSS J165139-724642 16 51 39.31 -72 46 42.96 4.92 SUMSS
3 PPM 373220 16 50 35.35 -72 45 18.36 6.23 PPM
4 PPM 373239 16 53 07.42 -72 38 56.76 6.79 PPM
5 ATPMN J165316.5-723934 16 53 16.51 -72 39 33.84 7.18 ATPMNCAT
PMN J1653-7239 16 53 20.30 -72 39 29.16 7.48 PMN
GLEAM J165320-723931 16 53 20.50 -72 39 30.96 7.48 GLEAMEGCAT
SUMSS J165320-723930 16 53 21.00 -72 39 30.96 7.52 SUMSS
ATPMN J165321.6-723930 16 53 21.70 -72 39 30.96 7.57 ATPMNCAT
6 ATPMN J165323.3-723929 16 53 23.30 -72 39 29.16 7.69 ATPMNCAT
7 PKS J1653-7238 16 53 23.11 -72 38 48.84 7.91 PKSCAT90
SPASS J165327-723942 16 53 27.29 -72 39 42.12 7.92 SPASS2P3GH
8 PGC 261916 16 53 18.19 -72 35 43.08 9.25 PGC2003
9 WDS J16504-7234 16 50 24.00 -72 34 00.12 9.87 WDS
10 PPM 786961 16 52 23.95 -72 32 12.12 10.04 PPM
11 PGC 90257 16 52 54.60 -72 32 47.04 10.42 PGC2003
12 SUMSS J165052-725143 16 50 52.70 -72 51 43.92 10.64 SUMSS
13 A1647-7227 16 53 00.36 -72 32 07.44 11.21 ZCAT
14 PGC 261363 16 49 12.10 -72 39 39.96 11.56 PGC2003
15 PGC 261237 16 54 19.61 -72 40 33.96 11.59 PGC2003
16 PPM 373214 16 49 13.90 -72 48 18.36 12.94 PPM
17 SN 2014ca 16 53 20.95 -72 30 51.84 13.09 ASIAGOSN

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