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.

4FGL J0231.0+3505

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J0231.0+3505 Swift-XRT detections in the field for 4FGL J0231.0+3505

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 02 31 12.44 +35 04 46.08 5.11 (4.7 ± 0.8) x 10-2 40 6.311 5.798

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J0231.0+3505 Swift-XRT image with known radio, optical and UV sources for 4FGL J0231.0+3505

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 XMMSL2 J023111.8+350447 02 31 11.88 +35 04 46.56 1.72 XMM-NEWTON
XMMSL2 J023111.8+350447 02 31 11.88 +35 04 46.56 1.72 XMM-NEWTON
2 1RXS J023122.3+350533 02 31 22.30 +35 05 33.00 3.39 ROSAT
1RXS J023122.3+350533 02 31 22.30 +35 05 33.00 3.39 ROSAT
2RXS J023123.0+350527 02 31 23.02 +35 05 27.60 3.54 ROSAT
2RXS J023123.0+350527 02 31 23.02 +35 05 27.60 3.54 ROSAT
3 1RXS J023106.8+345603 02 31 06.79 +34 56 03.48 9.93 ROSAT
2RXS J023106.9+345558 02 31 06.91 +34 55 58.44 10.01 ROSAT
2RXS J023106.9+345558 02 31 06.91 +34 55 58.44 10.01 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J023112+350443 02 31 12.31 +35 04 44.04 1.81 NVSS
2 NVSS J023118+350529 02 31 18.31 +35 05 29.04 2.59 NVSS
3 NSV 845 02 31 03.70 +35 09 52.92 3.93 GCVSNSVARS
4 NVSS J023127+350010 02 31 27.10 +35 00 10.08 7.26 NVSS
5 PGC 2061384 02 31 11.11 +35 13 54.84 8.01 PGC2003
6 NVSS J023044+345718 02 30 44.59 +34 57 19.08 9.70 NVSS
TGSSADR J023044.4+345717 02 30 44.50 +34 57 16.92 9.74 GMRTAS150M
WN 0227.7+3443 02 30 44.71 +34 57 15.12 9.76 WENSS
7 WDS J02310+3456 02 31 00.00 +34 55 59.88 10.05 WDS
8 HIP 11710 02 31 08.04 +34 55 50.52 10.15 HIPPARCOS
SAO 55621 02 31 08.11 +34 55 50.16 10.15 SAO
BD+34 448 02 31 08.14 +34 55 50.16 10.16 ACRS
PPM 67415 02 31 08.11 +34 55 50.16 10.16 PPM
HD 15562 02 31 08.14 +34 55 50.16 10.16 HIC
9 PRF129 02 31 19.01 +34 55 15.96 11.05 DIXON
10 NVSS J023100+345452 02 31 00.50 +34 54 51.84 11.16 NVSS
QORG J023100.6+345450 02 31 00.60 +34 54 50.04 11.20 QORGCAT
TGSSADR J023100.2+345449 02 31 00.31 +34 54 50.04 11.21 GMRTAS150M
WN 0227.9+3441 02 31 00.10 +34 54 43.92 11.31 WENSS
11 NVSS J023126+345515 02 31 26.71 +34 55 14.88 11.55 NVSS
WN 0228.4+3441 02 31 26.81 +34 55 12.00 11.60 WENSS
TGSSADR J023007.2+350102 02 30 07.30 +35 01 01.92 12.97 GMRTAS150M

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