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.

1FGL J2227.4-7804

Field

Detected Excesses

Swift-XRT image of the field for 1FGL J2227.4-7804 Swift-XRT detections in the field for 1FGL J2227.4-7804

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 22 24 54.50 -78 04 25.67 6.12 (3.1 ± 0.9) x 10-3 17 3.534 3.653

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 22 29 35.10 -78 02 53.84 6.52 (2.1 ± 0.7) x 10-3 12 2.738 2.857
2 22 28 13.94 -78 11 09.36 5.96 (1.9 ± 0.7) x 10-3 12 2.745 2.663
3 22 26 03.18 -77 56 02.72 6.41 (1.7 ± 0.7) x 10-3 10 2.398 2.376
4 22 29 50.61 -78 12 48.57 6.52 (1.7 ± 0.7) x 10-3 8 2.401 2.338

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 1FGL J2227.4-7804 Swift-XRT image with known radio, optical and UV sources for 1FGL J2227.4-7804

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 XMMSL2 J222834.3-775904 22 28 34.44 -77 59 03.84 6.26 XMM-NEWTON
XMMSL2 J222834.3-775904 22 28 34.44 -77 59 03.84 6.26 XMM-NEWTON
2 4U 2224-78 22 30 00.00 -77 54 00.00 12.98 INTEGRAL

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 GLEAM J222931-781257 22 29 31.80 -78 12 56.88 10.78 GLEAMEGCAT
SUMSS J222932-781258 22 29 32.11 -78 12 57.96 10.80 SUMSS
2 GLEAM J222747-781553 22 27 47.21 -78 15 52.92 11.66 GLEAMEGCAT
SUMSS J222746-781554 22 27 46.30 -78 15 55.08 11.68 SUMSS
3 SUMSS J222539-775355 22 25 39.31 -77 53 56.04 11.77 SUMSS
PMN J2227-7816 22 27 45.41 -78 16 05.16 11.85 PMN
4 SUMSS J223058-775919 22 30 58.51 -77 59 20.04 12.01 SUMSS
GLEAM J223100-775924 22 31 00.79 -77 59 24.00 12.08 GLEAMEGCAT
5 PMN J2231-7800 22 31 15.79 -78 00 03.96 12.56 PMN
6 SPASS J223011-781532 22 30 11.11 -78 15 32.04 14.05 SPASS2P3GH
PKS J2230-7816 22 30 10.61 -78 16 01.92 14.43 PKSCAT90
7 PKS2225-785 22 30 14.30 -78 16 04.08 14.57 DIXON
8 SUMSS J223029-781554 22 30 29.59 -78 15 55.08 14.92 SUMSS
ATPMN J223029.1-781557 22 30 29.11 -78 15 56.88 14.93 ATPMNCAT
GLEAM J223030-781554 22 30 30.19 -78 15 55.08 14.94 GLEAMEGCAT
ATPMN J223030.5-781556 22 30 30.60 -78 15 56.16 14.97 ATPMNCAT
CRATES J223028-781602 22 30 30.70 -78 15 56.16 14.98 CRATES
2225-785 22 30 29.71 -78 15 59.04 14.98 MRC
PMN J2230-7816 22 30 28.80 -78 16 01.92 14.99 PMN
ATPMN J223032.5-781554 22 30 32.50 -78 15 55.08 15.01 ATPMNCAT

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