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 J2255.4-3252

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J2255.4-3252 Swift-XRT detections in the field for 4FGL J2255.4-3252

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 22 55 35.21 -32 43 18.43 5.24 (3.0 ± 0.7) x 10-3 27 4.564 4.184
2 22 56 13.62 -33 03 34.69 6.12 (5.2 ± 1.3) x 10-3 19 3.828 4.005
3 22 55 06.95 -32 48 12.87 5.49 (3.2 ± 0.8) x 10-3 23 3.995 3.910

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 55 08.80 -32 45 30.45 6.04 (1.6 ± 0.5) x 10-3 19 2.996 2.974
2 22 55 45.95 -32 59 03.17 5.89 (1.7 ± 0.6) x 10-3 16 3.191 2.944
3 22 55 11.31 -33 00 09.35 6.12 (1.3 ± 0.5) x 10-3 14 2.687 2.641
4 22 56 26.11 -32 54 41.68 6.31 (1.1 ± 0.5) x 10-3 8 2.386 2.138

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J2255.4-3252 Swift-XRT image with known radio, optical and UV sources for 4FGL J2255.4-3252

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J225612.8-330340 22 56 12.82 -33 03 40.68 14.15 ROSAT
2RXS J225612.8-330340 22 56 12.82 -33 03 40.68 14.15 ROSAT
1RXS J225612.8-330341 22 56 12.79 -33 03 41.04 14.15 ROSAT
Unknown 22 56 12.79 -33 03 41.04 14.15 ROSAT
1RXS J225612.8-330341 22 56 12.79 -33 03 41.04 14.15 ROSAT
[MML2015] 5BZB J2256-3303 22 56 13.37 -33 03 37.80 14.18
1RXS J225612.8-330341 22 56 13.37 -33 03 37.80 14.18 ROSAT
6dFGS J2256133-330338 22 56 13.32 -33 03 38.52 14.18 ROSAT
ROXASDC J225614.2-330353.0 22 56 14.21 -33 03 52.92 14.49 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 PGC 684661 22 55 23.59 -32 52 23.16 1.39 PGC2003
GLEAM J225517-325410 22 55 17.81 -32 54 10.08 2.91 GLEAMEGCAT
TGSSADR J225517.3-325410 22 55 17.30 -32 54 11.16 3.01 GMRTAS150M
SUMSS J225517-325409 22 55 17.11 -32 54 10.08 3.03 SUMSS
2 NVSS J225517-325415 22 55 17.21 -32 54 15.84 3.07 NVSS
3 NVSS J225518-330007 22 55 18.19 -33 00 06.84 7.77 NVSS
GLEAM J225517-330016 22 55 17.71 -33 00 16.92 7.94 GLEAMEGCAT
4 PGC 682171 22 55 07.70 -33 01 41.16 10.07 PGC2003
5 PGC 683419 22 54 45.29 -32 56 47.04 10.20 PGC2003
6 NVSS J225542-324150 22 55 42.19 -32 41 49.92 11.22 NVSS
7 985- 45 22 54 38.14 -32 50 00.24 11.23 NLTT
SUMSS J225621-324904 22 56 21.41 -32 49 05.16 11.41 SUMSS
8 NVSS J225621-324902 22 56 21.31 -32 49 01.92 11.42 NVSS
QORG J225604.2-330208 22 56 04.20 -33 02 08.16 11.81 QORGCAT
9 NVSS J225604-330210 22 56 04.20 -33 02 09.96 11.85 NVSS
10 NVSS J225558-324150 22 55 58.70 -32 41 49.92 12.48 NVSS
11 NVSS J225449-324221 22 54 49.80 -32 42 20.88 13.39 NVSS
SUMSS J225449-324213 22 54 49.10 -32 42 12.96 13.59 SUMSS
RXS J22562-3303 22 56 13.30 -33 03 38.16 14.18 VERONCAT
QORG J225613.3-330338 22 56 13.30 -33 03 38.16 14.18 QORGCAT
[MML2015] 5BZB J2256-3303 22 56 13.39 -33 03 38.16 14.18 ROMABZCAT
12 NVSS J225613-330337 22 56 13.39 -33 03 38.16 14.18 NVSS
SUMSS J225613-330340 22 56 13.20 -33 03 39.96 14.19 SUMSS
PGC 681589 22 56 14.21 -33 03 51.84 14.48 PGC2003
ROXASDC J225614.2-330353.0 22 56 14.21 -33 03 52.92 14.49 ROXA
13 PGC 681541 22 56 17.90 -33 04 01.92 15.11 PGC2003
14 NVSS J225436-330356 22 54 36.31 -33 03 56.16 15.86 NVSS
TGSSADR J225626.1-330329 22 56 26.21 -33 03 29.16 15.94 GMRTAS150M
15 NVSS J225626-330327 22 56 26.40 -33 03 27.00 15.96 NVSS
QORG J225626.3-330333 22 56 26.30 -33 03 33.12 16.00 QORGCAT
SUMSS J225626-330334 22 56 26.30 -33 03 33.84 16.02 SUMSS
GLEAM J225626-330346 22 56 26.21 -33 03 47.16 16.15 GLEAMEGCAT

Penn State University Goddard Space Flight Center Swift