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.

3FGL J2321.6-1619

Field

Detected Excesses

Swift-XRT image of the field for 3FGL J2321.6-1619 Swift-XRT detections in the field for 3FGL J2321.6-1619

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 23 21 37.05 -16 19 26.21 3.81 (8.0 ± 0.5) x 10-2 271 15.490 15.450
2 23 21 01.96 -16 23 04.62 5.64 (3.8 ± 1.3) x 10-3 18 3.712 3.003

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 23 21 24.12 -16 16 24.25 6.31 (2.3 ± 1.0) x 10-3 11 2.685 2.328
2 23 22 19.74 -16 26 07.09 6.12 (2.2 ± 1.0) x 10-3 10 2.693 2.216

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 3FGL J2321.6-1619 Swift-XRT image with known radio, optical and UV sources for 3FGL J2321.6-1619

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J232136.6-161925 23 21 36.67 -16 19 26.04 0.47 ROSAT
2RXS J232136.6-161925 23 21 36.67 -16 19 26.04 0.47 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J232137-161935 23 21 37.01 -16 19 36.12 0.29 NVSS
2 WISH B2318.9-1634 23 21 36.41 -16 18 06.12 1.79 WISH
3 NVSS J232132-161650 23 21 32.40 -16 16 50.16 3.26 NVSS
4 NVSS J232136-161613 23 21 36.31 -16 16 13.08 3.66 NVSS
5 NVSS J232145-162314 23 21 45.60 -16 23 13.92 3.91 NVSS
6 NVSS J232158-161911 23 21 58.20 -16 19 10.92 5.08 NVSS
PMN J2321-1623 23 21 02.90 -16 23 08.16 8.85 PMN
MWACS J2321.0-1623 23 21 02.59 -16 23 17.16 8.99 MWACS
GLEAM J232102-162302 23 21 02.21 -16 23 03.12 8.99 GLEAMEGCAT
VLSSr J232102.0-162306 23 21 02.11 -16 23 06.00 9.02 VLSSR
AT20G J232102-162305 23 21 02.11 -16 23 04.92 9.03 AT20G
TXS 2318-166 23 21 01.99 -16 23 04.92 9.04 TEXAS
7 NVSS J232102-162305 23 21 01.99 -16 23 04.92 9.04 NVSS
2318-166 23 21 01.99 -16 23 03.12 9.04 MRC
PKS J2321-1622 23 21 01.99 -16 23 04.92 9.05 PKSCAT90
TGSSADR J232101.9-162305 23 21 01.99 -16 23 06.00 9.05 GMRTAS150M
WISH B2318.4-1639 23 21 01.70 -16 23 06.00 9.11 WISH
OZ-131 23 21 02.21 -16 23 33.00 9.16 DIXON
PKS2318-16 23 21 01.20 -16 22 57.00 9.16 DIXON
PKS 2318-16 23 21 01.01 -16 22 58.08 9.21 DIXON
8 NVSS J232058-162030 23 20 58.10 -16 20 30.12 9.40 NVSS
9 SPASS J232056-162255 23 20 56.40 -16 22 55.92 10.25 SPASS2P3GH
10 NVSS J232136-160915 23 21 36.00 -16 09 15.84 10.62 NVSS

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