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 J1623.9-6936

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1623.9-6936 Swift-XRT detections in the field for 4FGL J1623.9-6936

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 16 24 42.82 -69 28 03.23 4.48 (1.7 ± 0.4) x 10-3 37 4.599 3.989
2 16 23 15.19 -69 32 37.85 4.47 (1.4 ± 0.4) x 10-3 48 3.730 3.422
3 16 24 30.50 -69 40 33.45 4.63 (1.4 ± 0.4) x 10-3 46 3.160 3.302
4 16 24 31.48 -69 35 06.63 4.45 (1.2 ± 0.4) x 10-3 39 2.908 3.039
5 16 22 27.81 -69 35 35.61 4.60 (1.1 ± 0.4) x 10-3 31 3.191 3.025

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 23 19.98 -69 30 17.65 4.41 (1.0 ± 0.4) x 10-3 46 3.623 2.841
2 16 24 43.32 -69 29 42.31 4.45 (9 ± 4) x 10-4 35 2.905 2.649
3 16 24 10.48 -69 27 20.07 4.56 (8 ± 3) x 10-4 38 3.626 2.634
4 16 23 16.13 -69 32 36.05 4.46 (7 ± 3) x 10-4 45 2.649 2.152
5 16 23 49.62 -69 46 45.24 4.40 (7 ± 3) x 10-4 35 2.726 2.012
6 16 22 47.42 -69 42 23.04 4.25 (6 ± 3) x 10-4 32 2.749 1.875

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1623.9-6936 Swift-XRT image with known radio, optical and UV sources for 4FGL J1623.9-6936


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 SUMSS J162331-693209 16 23 31.10 -69 32 08.88 4.81 SUMSS
GLEAM J162329-693154 16 23 29.90 -69 31 54.84 5.08 GLEAMEGCAT
2 WDS J16238-6927 16 23 48.00 -69 27 00.00 9.45 WDS
3 GLEAM J162441-694531 16 24 42.00 -69 45 30.96 9.91 GLEAMEGCAT
SUMSS J162444-694536 16 24 43.99 -69 45 37.08 10.07 SUMSS
4 PPM 781111 16 25 59.69 -69 37 13.44 10.74 PPM
5 PPM 781072 16 22 01.49 -69 42 37.08 11.78 PPM

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