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 J0256.1+0323

Field

Detected Excesses

Swift-XRT image of the field for 1FGL J0256.1+0323 Swift-XRT detections in the field for 1FGL J0256.1+0323


No detected excesses found.

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 02 55 48.28 +03 33 30.42 7.27 (3.5 ± 1.2) x 10-3 13 2.928 2.941

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 1FGL J0256.1+0323 Swift-XRT image with known radio, optical and UV sources for 1FGL J0256.1+0323

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXP J025630.5+033322 02 56 30.48 +03 33 21.96 11.49 ROSAT
2 2RXS J025630.9+033501 02 56 30.98 +03 35 01.68 13.05 ROSAT
2RXS J025630.9+033501 02 56 30.98 +03 35 01.68 13.05 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J025604+032827 02 56 04.61 +03 28 27.12 5.57 NVSS
TGSSADR J025544.9+032818 02 55 44.90 +03 28 18.84 8.19 GMRTAS150M
FIRST J025544.9+032820 02 55 45.00 +03 28 19.92 8.20 FIRST
2 NVSS J025544+032822 02 55 44.71 +03 28 23.16 8.28 NVSS
3 NVSS J025559+031411 02 55 59.59 +03 14 11.04 9.25 NVSS
4 FIRST J025618.1+033339 02 56 18.19 +03 33 38.88 10.78 FIRST
0253+0321 02 56 27.10 +03 33 23.04 11.17 NORTH20CM
0253+0321 02 56 27.10 +03 33 23.04 11.17 NORTH6CM
GB6 J0256+0333 02 56 27.50 +03 33 21.96 11.19 GB6
PKS J0256+0333 02 56 28.20 +03 33 18.00 11.19 PKSCAT90
VLSSr J025628.7+033318 02 56 28.70 +03 33 18.00 11.25 VLSSR
GLEAM J025628+033323 02 56 28.39 +03 33 23.04 11.29 GLEAMEGCAT
TXS 0253+033 02 56 28.20 +03 33 24.84 11.30 TEXAS
TGSSADR J025628.2+033326 02 56 28.20 +03 33 25.92 11.32 GMRTAS150M
5 NVSS J025628+033327 02 56 28.20 +03 33 28.08 11.34 NVSS
FIRST J025628.1+033329 02 56 28.20 +03 33 29.16 11.36 FIRST
PMN J0256+0333 02 56 28.20 +03 33 36.00 11.47 PMN
6 MITG J0256+0334 02 56 25.90 +03 34 00.12 11.63 MITGB6CM
GLEAM J025548+033331 02 55 48.10 +03 33 32.04 11.82 GLEAMEGCAT
FIRST J025547.8+033331 02 55 47.81 +03 33 30.96 11.84 FIRST
7 NVSS J025548+033338 02 55 48.29 +03 33 38.88 11.91 NVSS
TGSSADR J025548.2+033339 02 55 48.19 +03 33 39.96 11.93 GMRTAS150M
FIRST J025548.3+033342 02 55 48.29 +03 33 42.12 11.95 FIRST
FIRST J025548.6+033347 02 55 48.70 +03 33 47.88 12.00 FIRST
FIRST J025656.7+031524 02 56 56.81 +03 15 24.84 13.93 FIRST
TGSSADR J025656.7+031525 02 56 56.81 +03 15 24.84 13.93 GMRTAS150M
8 NVSS J025656+031517 02 56 56.50 +03 15 16.92 13.94 NVSS

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