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 J0550.8-4400

Field

Detected Excesses

Swift-XRT image of the field for 1FGL J0550.8-4400 Swift-XRT detections in the field for 1FGL J0550.8-4400

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 05 51 48.83 -43 56 35.50 5.96 (2.7 ± 0.6) x 10-3 22 4.112 4.261
2 05 51 21.40 -43 56 46.46 5.28 (2.3 ± 0.7) x 10-3 23 3.817 3.551

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 05 50 40.08 -43 50 18.06 5.96 (1.5 ± 0.5) x 10-3 18 2.746 2.875
2 05 50 27.47 -43 49 03.44 6.21 (1.2 ± 0.5) x 10-3 12 2.556 2.528
3 05 50 18.74 -43 49 18.07 5.53 (1.1 ± 0.5) x 10-3 13 2.477 2.199
4 05 50 22.10 -43 48 57.27 5.49 (1.1 ± 0.6) x 10-3 9 2.477 1.996

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 1FGL J0550.8-4400 Swift-XRT image with known radio, optical and UV sources for 1FGL J0550.8-4400

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1RXS J055058.4-435701 05 50 58.39 -43 57 01.08 3.38 ROSAT
2 XMMSL2 J055149.6-435629 05 51 49.63 -43 56 29.40 10.84 XMM-NEWTON
XMMSL2 J055149.6-435629 05 51 49.63 -43 56 29.40 10.84 XMM-NEWTON
3 1RXS J055024.5-434850 05 50 24.50 -43 48 50.40 12.53 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 TGSSADR J055026.4-440227 05 50 26.40 -44 02 27.96 5.28 GMRTAS150M
GLEAM J055026-440232 05 50 26.59 -44 02 31.92 5.28 GLEAMEGCAT
SUMSS J055026-440232 05 50 26.30 -44 02 31.92 5.32 SUMSS
2 SUMSS J055026-435658 05 50 26.21 -43 56 58.92 5.85 SUMSS
3 SUMSS J055129-440524 05 51 29.40 -44 05 24.00 8.29 SUMSS
4 GLEAM J055027-440815 05 50 27.50 -44 08 16.08 9.23 GLEAMEGCAT
TGSSADR J055026.7-440813 05 50 26.71 -44 08 12.84 9.26 GMRTAS150M
SUMSS J055026-440818 05 50 26.59 -44 08 17.88 9.34 SUMSS

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