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 J2303.9+5554

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J2303.9+5554 Swift-XRT detections in the field for 4FGL J2303.9+5554

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 23 03 51.70 +55 56 18.15 4.03 (4.7 ± 0.4) x 10-2 147 11.400 11.420

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 23 04 39.92 +56 03 29.05 5.49 (6 ± 2) x 10-3 20 2.474 2.605
2 23 04 37.82 +55 47 31.07 6.31 (3.5 ± 1.4) x 10-3 11 2.675 2.579
3 23 03 08.91 +55 53 52.97 5.96 (2.8 ± 1.1) x 10-3 16 2.621 2.484

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J2303.9+5554 Swift-XRT image with known radio, optical and UV sources for 4FGL J2303.9+5554

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J230344.1+554915 23 03 44.11 +55 49 15.96 5.96 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J230352+555609 23 03 52.51 +55 56 08.88 1.61 NVSS
2 3+55109 23 04 18.07 +55 52 29.64 3.54 WACKERLING
3 NVSS J230401+555902 23 04 01.99 +55 59 02.04 4.22 NVSS
4 NVSS J230321+555031 23 03 21.41 +55 50 30.84 6.83 NVSS
WN 2301.1+5534 23 03 21.31 +55 50 26.16 6.90 WENSS
TGSSADR J230320.8+555028 23 03 20.90 +55 50 29.04 6.91 GMRTAS150M
5 WDS J23036+5548 23 03 36.00 +55 47 60.00 7.57 WDS
WN 2301.7+5530 23 03 53.59 +55 47 00.96 7.86 WENSS
TGSSADR J230353.4+554700 23 03 53.40 +55 46 59.88 7.87 GMRTAS150M
6 NVSS J230353+554659 23 03 53.40 +55 46 59.16 7.89 NVSS
7 PPM 41436 23 03 37.92 +56 04 48.72 10.41 PPM
BD+55 2880 23 03 37.80 +56 04 49.08 10.42 ACRS
8 BD+55 2880 23 03 41.47 +56 05 19.32 10.78 ACRS
PPM 41437 23 03 41.42 +56 05 19.68 10.78 PPM
SAO 35107 23 03 41.45 +56 05 20.04 10.79 SAO
9 SAO 35095 23 02 45.36 +55 50 07.08 11.37 SAO
HD 217851 23 02 45.36 +55 50 07.08 11.37 HIC
PPM 41422 23 02 45.34 +55 50 07.44 11.37 PPM
BD+55 2879 23 02 45.31 +55 50 07.08 11.38 ACRS
HIP 113803 23 02 45.29 +55 50 07.08 11.38 HIPPARCOS

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