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 J0554.0-0839

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J0554.0-0839 Swift-XRT detections in the field for 4FGL J0554.0-0839

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 05 54 55.72 -08 43 04.86 5.40 (3.8 ± 1.0) x 10-3 23 4.433 3.972
2 05 53 56.93 -08 51 24.31 6.93 (4.1 ± 1.1) x 10-3 14 3.175 3.713
3 05 53 41.49 -08 40 00.91 5.70 (2.8 ± 0.8) x 10-3 24 4.059 3.436
4 05 53 59.80 -08 38 06.28 6.93 (2.6 ± 0.8) x 10-3 13 3.228 3.284

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 05 54 18.03 -08 38 11.32 6.78 (1.9 ± 0.7) x 10-3 15 2.899 2.691
2 05 54 18.59 -08 47 08.98 6.04 (1.6 ± 0.6) x 10-3 13 2.657 2.448
3 05 54 21.38 -08 48 09.98 6.04 (1.6 ± 0.7) x 10-3 14 2.657 2.421
4 05 53 34.48 -08 37 50.48 6.65 (1.3 ± 0.6) x 10-3 10 2.311 2.158

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J0554.0-0839 Swift-XRT image with known radio, optical and UV sources for 4FGL J0554.0-0839


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 OG-086 05 53 55.49 -08 40 27.84 2.43 DIXON
2 NVSS J055351-083549 05 53 51.19 -08 35 49.92 4.74 NVSS
3 NVSS J055420-084231 05 54 20.71 -08 42 30.96 5.19 NVSS
GLEAM J055342-084000 05 53 42.00 -08 40 00.84 5.52 GLEAMEGCAT
4 NVSS J055341-084003 05 53 41.90 -08 40 03.00 5.56 NVSS
TGSSADR J055341.8-084002 05 53 41.90 -08 40 01.92 5.56 GMRTAS150M
CRATES J055341-084010 05 53 41.90 -08 40 01.92 5.56 CRATES
AT20G J055341-084000 05 53 41.90 -08 40 00.84 5.57 AT20G
PMN J0553-0840 05 53 41.71 -08 40 09.84 5.63 PMN
TXS 0551-086 05 53 41.59 -08 40 04.08 5.63 TEXAS
SPASS J055340-084009 05 53 40.39 -08 40 09.12 5.95 SPASS2P3GH
GLEAM J055428-084359 05 54 28.20 -08 43 59.16 7.55 GLEAMEGCAT
QORG J055428.6-084402 05 54 28.61 -08 44 02.04 7.66 QORGCAT
5 NVSS J055428-084358 05 54 28.90 -08 43 59.16 7.69 NVSS
TGSSADR J055428.8-084408 05 54 28.80 -08 44 08.88 7.77 GMRTAS150M
6 NVSS J055429-083147 05 54 29.59 -08 31 46.92 9.80 NVSS
TGSSADR J055429.6-083146 05 54 29.59 -08 31 45.84 9.81 GMRTAS150M
GLEAM J055429-083142 05 54 29.50 -08 31 42.96 9.84 GLEAMEGCAT
7 NVSS J055446-084244 05 54 46.20 -08 42 43.92 10.93 NVSS
8 NVSS J055328-083055 05 53 28.30 -08 30 55.08 12.21 NVSS

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