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 J1251.0-4943

Field

Detected Excesses

Swift-XRT image of the field for 3FGL J1251.0-4943 Swift-XRT detections in the field for 3FGL J1251.0-4943

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 12 50 20.89 -49 51 44.39 4.80 (1.3 ± 0.2) x 10-2 48 6.613 6.399
2 12 50 58.43 -49 44 44.35 5.44 (6.2 ± 1.4) x 10-3 29 4.499 4.457
3 12 51 51.95 -49 36 33.38 6.12 (4.3 ± 1.1) x 10-3 18 3.920 3.868
4 12 51 29.63 -49 44 02.45 6.12 (4.2 ± 1.1) x 10-3 19 3.628 3.816
5 12 50 15.44 -49 38 31.90 7.97 (2.4 ± 0.8) x 10-3 9 2.583 3.014

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 28.10 -49 41 47.01 6.65 (2.2 ± 0.9) x 10-3 11 2.553 2.388
2 12 51 31.82 -49 39 31.59 6.78 (1.6 ± 0.8) x 10-3 12 2.689 2.132

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 3FGL J1251.0-4943 Swift-XRT image with known radio, optical and UV sources for 3FGL J1251.0-4943

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 6.37 ROSAT
2 1RXS J125020.5-495144 12 50 20.50 -49 51 43.92 10.71 ROSAT
2RXS J125020.4-495143 12 50 20.45 -49 51 43.56 10.71 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 TGSSADR J125059.1-494446 12 50 59.11 -49 44 45.96 1.38 GMRTAS150M
SUMSS J125058-494447 12 50 58.90 -49 44 47.04 1.42 SUMSS
2 PMN J1250-4945 12 50 56.11 -49 45 20.16 2.12 PMN
3 TGSSADR J125037.2-494022 12 50 37.30 -49 40 23.16 5.77 GMRTAS150M
4 TGSSADR J125138.7-495146 12 51 38.71 -49 51 47.16 9.53 GMRTAS150M
SUMSS J125138-495148 12 51 38.59 -49 51 48.96 9.54 SUMSS
5 SUMSS J125214-495158 12 52 14.90 -49 51 59.04 13.79 SUMSS
TGSSADR J125215.0-495159 12 52 15.00 -49 51 59.04 13.82 GMRTAS150M

Penn State University Goddard Space Flight Center Swift