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 J2251.2-4928

Field

Detected Excesses

Swift-XRT image of the field for 1FGL J2251.2-4928 Swift-XRT detections in the field for 1FGL J2251.2-4928

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 22 51 09.94 -49 32 42.80 5.53 (4.6 ± 1.3) x 10-3 25 3.558 3.525
2 22 50 23.56 -49 23 21.85 6.78 (3.4 ± 1.1) x 10-3 12 2.949 3.081

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 50 33.60 -49 23 08.16 6.41 (2.8 ± 1.1) x 10-3 10 2.601 2.627
2 22 51 27.60 -49 29 12.22 6.65 (2.9 ± 1.1) x 10-3 16 2.726 2.496
3 22 50 21.51 -49 24 36.03 7.09 (2.4 ± 1.0) x 10-3 7 2.282 2.377

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 1FGL J2251.2-4928 Swift-XRT image with known radio, optical and UV sources for 1FGL J2251.2-4928

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 SWIFT J225128.2-492915 22 51 28.25 -49 29 15.36 1.86 SWIFT
2 SWIFT J225109.8-493240 22 51 09.82 -49 32 40.92 4.26 SWIFT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 TGSSADR J225128.6-492905 22 51 28.61 -49 29 06.00 1.88 GMRTAS150M
[HBM2016] J225128.47-492912.90 22 51 28.51 -49 29 12.84 1.88 ASKAPBETA
[PME2013] J2251-4929 22 51 28.80 -49 29 09.96 1.92 AT2FGLUS
[SPT2015] ATCA J2251-4929 22 51 28.80 -49 29 09.96 1.92 FER2FUSRID
SUMSS J225128-492912 22 51 28.70 -49 29 12.12 1.92 SUMSS
2 PMN J2251-4929 22 51 35.90 -49 29 33.00 3.13 PMN
3 [HBM2016] J225015.37-492818.90 22 50 15.41 -49 28 18.84 10.09 ASKAPBETA
SUMSS J225015-492816 22 50 15.19 -49 28 15.96 10.13 SUMSS
4 [HBM2016] J225035.83-493927.05 22 50 35.81 -49 39 27.00 12.77 ASKAPBETA
5 [HBM2016] J225229.12-492111.35 22 52 29.11 -49 21 11.88 13.81 ASKAPBETA
SUMSS J225229-492113 22 52 29.40 -49 21 12.96 13.84 SUMSS
TGSSADR J225229.3-492108 22 52 29.40 -49 21 09.00 13.87 GMRTAS150M
GLEAM J225230-492110 22 52 30.50 -49 21 11.16 14.00 GLEAMEGCAT

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