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 J0427.9+5556

Field

Detected Excesses

Swift-XRT image of the field for 1FGL J0427.9+5556 Swift-XRT detections in the field for 1FGL J0427.9+5556

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 04 27 51.49 +55 57 12.22 6.12 (3.2 ± 1.0) x 10-3 17 3.224 3.088

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 04 27 56.45 +55 58 19.74 6.93 (2.3 ± 0.9) x 10-3 15 2.644 2.596

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 1FGL J0427.9+5556 Swift-XRT image with known radio, optical and UV sources for 1FGL J0427.9+5556

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1RXS J042738.8+555831 04 27 38.81 +55 58 31.44 2.93 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J042804+555657 04 28 04.10 +55 56 57.12 1.17 NVSS
2 QORG J042739.2+555828 04 27 39.19 +55 58 27.84 2.85 QORGCAT
3 PGC 2521642 04 27 30.31 +55 59 29.04 4.45 PGC2003
4 NVSS J042730+560028 04 27 30.31 +56 00 29.16 5.11 NVSS
5 NVSS J042825+555245 04 28 25.90 +55 52 45.12 5.86 NVSS
6 NVSS J042745+560337 04 27 45.70 +56 03 38.16 6.96 NVSS
7 NVSS J042853+560037 04 28 53.50 +56 00 38.16 8.92 NVSS
8 NVSS J042756+560555 04 27 56.81 +56 05 56.04 9.11 NVSS
VLSS J0428.3+5548 04 28 22.20 +55 48 29.16 9.12 VLSS
9 NVSS J042822+554827 04 28 22.30 +55 48 28.08 9.15 NVSS
WN 0424.3+5541 04 28 22.61 +55 48 28.08 9.16 WENSS
GB6 J0428+5548 04 28 23.30 +55 48 28.08 9.20 GB6
7C 042418.8+554143 04 28 22.61 +55 48 20.88 9.26 GP7C151MHZ
QORG J042855.2+555209 04 28 55.20 +55 52 09.12 9.54 QORGCAT
10 NVSS J042855+555208 04 28 55.61 +55 52 08.04 9.60 NVSS
11 0424+5541 04 28 25.39 +55 48 05.04 9.67 NORTH6CM
12 NVSS J042722+560659 04 27 22.80 +56 07 00.12 11.17 NVSS
13 NVSS J042903+560254 04 29 03.00 +56 02 54.96 11.20 NVSS
14 NVSS J042719+560823 04 27 19.10 +56 08 24.00 12.66 NVSS
WN 0423.2+5601 04 27 19.01 +56 08 33.00 12.80 WENSS
15 NVSS J042632+560208 04 26 32.40 +56 02 08.16 12.82 NVSS
0423+5601 04 27 18.91 +56 08 39.12 12.91 NORTH6CM
WN 0422.6+5541 04 26 41.21 +55 47 58.92 13.69 WENSS
16 NVSS J042640+554800 04 26 40.90 +55 47 60.00 13.71 NVSS
17 NVSS J042920+560713 04 29 20.30 +56 07 14.16 15.73 NVSS

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