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.

2FGL J0540.1-7554

Field

Detected Excesses
Swift-XRT image of the field for 2FGL J0540.1-7554 Swift-XRT detections in the field for 2FGL J0540.1-7554

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 05 41 36.67 -76 04 22.49 3.92 (4.0 ± 0.3) x 10-2 176 13.340 12.370
2 05 40 26.97 -75 53 53.13 5.96 (4.7 ± 1.2) x 10-3 22 3.772 3.911

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 41 59.87 -75 55 23.93 6.21 (2.5 ± 1.0) x 10-3 15 2.592 2.558
2 05 39 25.99 -76 06 44.58 6.52 (2.1 ± 0.8) x 10-3 11 2.481 2.549
3 05 39 54.71 -75 54 33.73 5.89 (2.3 ± 1.0) x 10-3 23 2.613 2.360
4 05 39 54.71 -75 54 33.73 5.89 (2.1 ± 0.9) x 10-3 23 2.416 2.316

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 2FGL J0540.1-7554 Swift-XRT image with known radio, optical and UV sources for 2FGL J0540.1-7554

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 XMMSL2 J054137.7-760418 05 41 36.65 -76 04 16.68 11.28 XMM-NEWTON
XMMSL2 J054137.7-760418 05 41 36.48 -76 04 19.20 11.32 XMM-NEWTON
XMMSL2 J054137.7-760418 05 41 37.90 -76 04 17.40 11.33 XMM-NEWTON
XMMSL2 J054137.7-760418 05 41 37.73 -76 04 18.12 11.33 XMM-NEWTON
XMMSL2 J054137.7-760418 05 41 37.73 -76 04 18.12 11.33 XMM-NEWTON
XMMSL2 J054137.7-760418 05 41 36.77 -76 04 20.64 11.34 XMM-NEWTON
HD 39150 05 41 36.38 -76 04 24.60 11.39 ROSAT
HD 39150 05 41 34.99 -76 04 30.00 11.43 ROSAT
1RXS J054135.6-760434 05 41 35.59 -76 04 33.96 11.51 ROSAT
2RXS J054135.5-760434 05 41 35.52 -76 04 34.68 11.52 ROSAT
2RXS J054135.5-760434 05 41 35.52 -76 04 34.68 11.52 ROSAT
1RXS J054135.6-760434 05 41 35.59 -76 04 34.68 11.52 ROSAT
2 XMMSL2 J054317.6-760215 05 43 17.64 -76 02 15.36 13.83 XMM-NEWTON
XMMSL2 J054317.6-760215 05 43 17.64 -76 02 15.36 13.83 XMM-NEWTON
2RXS J054317.3-760220 05 43 17.30 -76 02 20.76 13.86 ROSAT
2RXS J054317.3-760220 05 43 17.30 -76 02 20.76 13.86 ROSAT
1RXS J054317.4-760222 05 43 17.40 -76 02 21.84 13.88 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 PMN J0541-7600 05 41 10.80 -76 00 24.12 7.13 PMN
2 GLEAM J054015-760150 05 40 15.70 -76 01 50.88 7.61 GLEAMEGCAT
[SPT2015] ATCA J0540-7601 05 40 11.81 -76 01 54.12 7.67 FER2FUSRID
[PME2013] J0540-7601 05 40 10.70 -76 01 54.84 7.68 AT2FGLUS
SUMSS J054011-760156 05 40 11.40 -76 01 57.00 7.71 SUMSS
3 GLEAM J053917-760127 05 39 17.90 -76 01 27.12 7.92 GLEAMEGCAT
[PME2013] J0539-7601 05 39 17.90 -76 01 31.08 7.99 AT2FGLUS
[SPT2015] ATCA J0539-7601 05 39 17.81 -76 01 33.96 8.02 FER2FUSRID
SUMSS J053916-760131 05 39 16.20 -76 01 31.08 8.03 SUMSS
4 SUMSS J054123-760108 05 41 23.21 -76 01 08.04 8.15 SUMSS
[SPT2015] ATCA J0541-7601 05 41 23.59 -76 01 08.04 8.16 FER2FUSRID
[PME2013] J0541-7601 05 41 22.01 -76 01 13.08 8.17 AT2FGLUS
PMN J0539-7601 05 39 16.70 -76 01 53.04 8.35 PMN
5 GLEAM J053841-754733 05 38 41.59 -75 47 33.00 8.66 GLEAMEGCAT
SUMSS J053837-754723 05 38 37.20 -75 47 22.92 8.96 SUMSS
6 GLEAM J053725-760033 05 37 25.39 -76 00 33.84 11.91 GLEAMEGCAT
7 SUMSS J053822-760431 05 38 22.39 -76 04 31.08 12.24 SUMSS
8 SUMSS J053701-755008 05 37 01.70 -75 50 08.16 12.30 SUMSS
GLEAM J053820-760432 05 38 20.59 -76 04 32.16 12.30 GLEAMEGCAT
9 SUMSS J053703-755902 05 37 03.41 -75 59 03.12 12.41 SUMSS
GLEAM J053658-754950 05 36 58.61 -75 49 50.16 12.58 GLEAMEGCAT

Penn State University Goddard Space Flight Center Swift