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 J1250.9-4940

Field

Detected Excesses
Swift-XRT image of the field for 1FGL J1250.9-4940 Swift-XRT detections in the field for 1FGL J1250.9-4940

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 12 50 20.86 -49 51 44.15 4.78 (1.3 ± 0.2) x 10-2 48 6.634 6.333
2 12 50 58.81 -49 44 47.83 5.49 (6.4 ± 1.4) x 10-3 26 4.518 4.558
3 12 51 29.66 -49 44 00.80 6.12 (4.4 ± 1.1) x 10-3 19 3.846 3.940
4 12 51 51.98 -49 36 34.62 6.12 (4.3 ± 1.1) x 10-3 18 3.967 3.838

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 12 50 15.49 -49 38 31.57 7.97 (2.3 ± 0.8) x 10-3 10 2.719 2.793
2 12 51 31.26 -49 39 30.23 6.65 (2.2 ± 0.9) x 10-3 14 2.544 2.544

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 1FGL J1250.9-4940 Swift-XRT image with known radio, optical and UV sources for 1FGL J1250.9-4940

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1RXS J125028.6-494605 12 50 28.61 -49 46 05.16 7.61 ROSAT
2 1RXS J125020.5-495144 12 50 20.50 -49 51 43.92 13.00 ROSAT
2RXS J125020.4-495143 12 50 20.45 -49 51 43.56 13.00 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 TGSSADR J125037.2-494022 12 50 37.30 -49 40 23.16 3.67 GMRTAS150M
2 TGSSADR J125059.1-494446 12 50 59.11 -49 44 45.96 4.37 GMRTAS150M
SUMSS J125058-494447 12 50 58.90 -49 44 47.04 4.38 SUMSS
3 PMN J1250-4945 12 50 56.11 -49 45 20.16 4.96 PMN
4 TGSSADR J125138.7-495146 12 51 38.71 -49 51 47.16 12.97 GMRTAS150M
SUMSS J125138-495148 12 51 38.59 -49 51 48.96 12.99 SUMSS

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