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 3.223 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 2.643 2.596
2 04 27 24.35 +55 45 09.71 6.65 (1.6 ± 0.7) x 10-3 8 2.365 2.304

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
CGPS J042803+555649 04 28 03.60 +55 56 49.92 1.09 CGPSNGPCAT
1 NVSS J042804+555657 04 28 04.10 +55 56 57.12 1.17 NVSS
2 NVSS J042730+560028 04 27 30.31 +56 00 29.16 5.11 NVSS
CGPS J042730+560028 04 27 30.00 +56 00 29.16 5.14 CGPSNGPCAT
3 NVSS J042825+555245 04 28 25.90 +55 52 45.12 5.86 NVSS
CGPS J042826+555247 04 28 26.90 +55 52 46.92 5.94 CGPSNGPCAT
CGPS J042746+560330 04 27 46.10 +56 03 29.88 6.82 CGPSNGPCAT
4 NVSS J042745+560337 04 27 45.70 +56 03 38.16 6.96 NVSS
5 NVSS J042853+560037 04 28 53.50 +56 00 38.16 8.92 NVSS
CGPS J042853+560040 04 28 53.59 +56 00 39.96 8.96 CGPSNGPCAT
VLSSr J042821.9+554832 04 28 22.01 +55 48 32.04 9.06 VLSSR
6 NVSS J042756+560555 04 27 56.81 +56 05 56.04 9.11 NVSS
TGSSADR J042822.3+554828 04 28 22.39 +55 48 29.16 9.13 GMRTAS150M
CGPS J042822+554828 04 28 22.39 +55 48 28.08 9.14 CGPSNGPCAT
7 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
8 CGPS J042705+555038 04 27 05.90 +55 50 39.12 9.33 CGPSNGPCAT
9 NVSS J042855+555208 04 28 55.61 +55 52 08.04 9.60 NVSS
10 0424+5541 04 28 25.39 +55 48 05.04 9.67 NORTH6CM
11 NVSS J042722+560659 04 27 22.80 +56 07 00.12 11.17 NVSS
12 NVSS J042903+560254 04 29 03.00 +56 02 54.96 11.20 NVSS
CGPS J042903+560252 04 29 03.19 +56 02 53.16 11.21 CGPSNGPCAT
TGSSADR J042719.1+560822 04 27 19.20 +56 08 22.92 12.64 GMRTAS150M
13 NVSS J042719+560823 04 27 19.10 +56 08 24.00 12.66 NVSS
CGPS J042718+560827 04 27 19.01 +56 08 27.96 12.73 CGPSNGPCAT
CGPS J042632+560208 04 26 32.81 +56 02 08.16 12.76 CGPSNGPCAT
WN 0423.2+5601 04 27 19.01 +56 08 33.00 12.80 WENSS
14 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
CGPS J042640+554802 04 26 40.80 +55 48 02.88 13.69 CGPSNGPCAT
WN 0422.6+5541 04 26 41.21 +55 47 58.92 13.69 WENSS
15 NVSS J042640+554800 04 26 40.90 +55 47 60.00 13.71 NVSS
TGSSADR J042640.9+554758 04 26 40.99 +55 47 57.84 13.73 GMRTAS150M
16 NVSS J042920+560713 04 29 20.30 +56 07 14.16 15.73 NVSS
CGPS J042919+560718 04 29 19.90 +56 07 18.12 15.74 CGPSNGPCAT

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