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.

3FGL J0239.0+2555

Field

Detected Excesses
Swift-XRT image of the field for 3FGL J0239.0+2555 Swift-XRT detections in the field for 3FGL J0239.0+2555

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 02 38 54.07 +25 54 05.26 4.02 (3.8 ± 0.3) x 10-2 150 11.690 11.470
2 02 39 47.39 +25 55 52.86 5.24 (5.4 ± 1.3) x 10-3 22 4.425 4.094

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 39 31.50 +25 48 44.59 6.04 (2.4 ± 0.9) x 10-3 12 2.658 2.570
2 02 38 46.42 +26 03 17.70 7.48 (1.9 ± 0.8) x 10-3 7 2.324 2.320
3 02 39 34.75 +25 59 28.36 6.52 (1.3 ± 0.7) x 10-3 9 2.321 1.853

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 3FGL J0239.0+2555 Swift-XRT image with known radio, optical and UV sources for 3FGL J0239.0+2555

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 XMMSL2 J023853.4+255405 02 38 53.40 +25 54 05.04 2.69 XMM-NEWTON
XMMSL2 J023853.4+255405 02 38 53.40 +25 54 05.04 2.69 XMM-NEWTON
2 2RXS J023851.4+255348 02 38 51.43 +25 53 48.48 3.21 ROSAT
2RXS J023851.4+255348 02 38 51.43 +25 53 48.48 3.21 ROSAT
3 1RXS J023933.7+255936 02 39 33.70 +25 59 36.60 7.94 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J023853+255407 02 38 53.90 +25 54 07.92 2.57 NVSS
2 NVSS J023918+255805 02 39 18.10 +25 58 05.88 4.24 NVSS
3 NVSS J023835+255121 02 38 35.30 +25 51 20.88 7.58 NVSS
4 NVSS J023830+255617 02 38 30.00 +25 56 17.16 7.79 NVSS
5 NVSS J023910+260408 02 39 10.39 +26 04 09.12 9.05 NVSS
GLEAM J023905+260437 02 39 05.30 +26 04 36.84 9.42 GLEAMEGCAT
6 NVSS J023905+260443 02 39 04.99 +26 04 42.96 9.52 NVSS
TGSSADR J023905.1+260443 02 39 05.09 +26 04 42.96 9.52 GMRTAS150M
TGSSADR J023831.4+254907 02 38 31.51 +25 49 06.96 9.56 GMRTAS150M
7 NVSS J023831+254907 02 38 31.30 +25 49 06.96 9.58 NVSS
VLSSr J023831.5+254846 02 38 31.51 +25 48 47.16 9.77 VLSSR
GLEAM J023831+254848 02 38 31.01 +25 48 48.96 9.84 GLEAMEGCAT
8 NVSS J023831+254820 02 38 31.99 +25 48 20.16 10.00 NVSS
TGSSADR J023831.7+254821 02 38 31.80 +25 48 21.96 10.01 GMRTAS150M
9 NVSS J023930+254548 02 39 30.70 +25 45 48.96 11.11 NVSS
10 NVSS J023813+255521 02 38 13.51 +25 55 22.08 11.42 NVSS
11 NVSS J023944+254643 02 39 45.00 +25 46 42.96 12.47 NVSS
TGSSADR J023944.9+254643 02 39 45.00 +25 46 42.96 12.48 GMRTAS150M
12 NVSS J023952+254752 02 39 52.70 +25 47 53.16 13.12 NVSS
13 NVSS J023951+260453 02 39 52.01 +26 04 54.12 14.45 NVSS

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