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 J0427.3+2028

Field

Detected Excesses
Swift-XRT image of the field for 1FGL J0427.3+2028 Swift-XRT detections in the field for 1FGL J0427.3+2028

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 04 27 37.44 +20 18 14.26 5.76 (3.6 ± 1.1) x 10-3 19 3.559 3.289
2 04 27 43.40 +20 25 21.14 6.78 (2.8 ± 0.9) x 10-3 13 3.000 3.048

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 1FGL J0427.3+2028 Swift-XRT image with known radio, optical and UV sources for 1FGL J0427.3+2028

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J042714.3+202815 04 27 14.35 +20 28 15.60 1.86 ROSAT
2RXS J042714.3+202815 04 27 14.35 +20 28 15.60 1.86 ROSAT
2 2RXS J042738.3+201833 04 27 38.30 +20 18 33.84 10.80 ROSAT
2RXS J042738.3+201833 04 27 38.30 +20 18 33.84 10.80 ROSAT
1RXS J042738.0+201811 04 27 37.99 +20 18 11.16 11.13 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J042712+202814 04 27 12.31 +20 28 14.16 2.33 NVSS
2 NVSS J042743+202525 04 27 43.49 +20 25 24.96 5.97 NVSS
TGSSADR J042750.0+202308 04 27 49.99 +20 23 08.88 8.57 GMRTAS150M
3 NVSS J042750+202307 04 27 49.99 +20 23 08.16 8.57 NVSS
TGSSADR J042730.9+201937 04 27 31.01 +20 19 36.84 9.28 GMRTAS150M
4 NVSS J042731+201937 04 27 31.01 +20 19 36.84 9.28 NVSS
GLEAM J042731+201926 04 27 31.20 +20 19 26.04 9.47 GLEAMEGCAT
5 NVSS J042640+202420 04 26 40.90 +20 24 20.16 10.57 NVSS
6 NVSS J042637+202240 04 26 37.20 +20 22 40.08 12.10 NVSS
TGSSADR J042657.8+201733 04 26 57.91 +20 17 33.00 12.48 GMRTAS150M
7 NVSS J042657+201731 04 26 57.91 +20 17 31.92 12.50 NVSS
GLEAM J042657+201720 04 26 57.79 +20 17 21.12 12.68 GLEAMEGCAT

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