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.

4FGL J0139.5-2228

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J0139.5-2228 Swift-XRT detections in the field for 4FGL J0139.5-2228


No detected excesses found.

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 01 39 23.32 -22 23 54.33 7.71 (2.3 ± 0.9) x 10-3 11 2.561 2.599
2 01 39 15.41 -22 38 47.44 6.78 (2.6 ± 1.0) x 10-3 10 2.563 2.529
3 01 40 23.09 -22 28 28.08 7.09 (2.0 ± 0.8) x 10-3 8 2.330 2.351
4 01 40 21.54 -22 31 32.87 6.93 (2.1 ± 0.9) x 10-3 8 2.555 2.350

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J0139.5-2228 Swift-XRT image with known radio, optical and UV sources for 4FGL J0139.5-2228


No known X-ray or gamma ray sources found.

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J013923-222349 01 39 23.90 -22 23 48.84 5.51 NVSS
TGSSADR J013924.0-222347 01 39 24.00 -22 23 48.12 5.53 GMRTAS150M
WISH B0137.0-2238 01 39 23.81 -22 23 44.88 5.57 WISH
GLEAM J013923-222338 01 39 23.90 -22 23 38.04 5.68 GLEAMEGCAT
2 PPM 244186 01 39 42.74 -22 23 00.60 5.91 PPM
SAO 167204 01 39 42.77 -22 23 00.60 5.91 HIC
HIP 7746 01 39 42.77 -22 23 00.24 5.91 HIPPARCOS
SAO 167204 01 39 42.79 -22 23 00.60 5.91 SAO
3 PGC 813014 01 39 06.29 -22 30 59.04 7.09 PGC2003
4 SAO 167209 01 39 56.71 -22 23 05.64 7.45 SAO
CD-23 621 01 39 56.98 -22 23 04.56 7.50 ACRS
PPM 244192 01 39 57.05 -22 23 04.56 7.51 PPM
5 WISH B0137.1-2235 01 39 28.39 -22 20 21.84 8.45 WISH
6 NVSS J014010-222451 01 40 10.10 -22 24 51.84 8.90 NVSS
TGSSADR J013928.2-221935 01 39 28.30 -22 19 36.12 9.21 GMRTAS150M
7 NVSS J013928-221936 01 39 28.20 -22 19 36.12 9.21 NVSS
8 -23:610 01 38 57.22 -22 25 29.64 9.35 NLTT
GLEAM J013927-221918 01 39 27.70 -22 19 18.12 9.52 GLEAMEGCAT
9 PGC 812101 01 38 54.31 -22 34 32.16 11.14 PGC2003
10 PGC 198287 01 38 59.50 -22 36 37.08 11.47 PGC2003
GLEAM J013855-223706 01 38 55.01 -22 37 06.96 12.57 GLEAMEGCAT
11 NVSS J013854-223727 01 38 54.70 -22 37 27.84 12.85 NVSS
WISH B0136.5-2252 01 38 54.70 -22 37 28.92 12.88 WISH
TGSSADR J013854.4-223731 01 38 54.41 -22 37 32.16 12.95 GMRTAS150M
12 PGC 810824 01 39 00.00 -22 39 16.92 13.39 PGC2003

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