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 J2120.0+5257

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J2120.0+5257 Swift-XRT detections in the field for 4FGL J2120.0+5257

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 21 19 40.95 +53 03 25.08 4.39 (3.3 ± 0.4) x 10-2 84 8.853 8.607
2 21 19 58.67 +52 58 41.65 6.31 (7 ± 2) x 10-3 17 3.553 3.597

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J2120.0+5257 Swift-XRT image with known radio, optical and UV sources for 4FGL J2120.0+5257

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J212101.7+525940 21 21 01.70 +52 59 40.56 9.09 ROSAT
2 2RXS J211857.0+530524 21 18 57.05 +53 05 25.08 13.13 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 PPM 39365 21 19 59.40 +52 58 41.52 1.83 PPM
BD+52 2916 21 19 59.33 +52 58 41.52 1.83 ACRS
SAO 33334 21 19 58.75 +52 58 44.40 1.91 SAO
PPM 39364 21 19 58.80 +52 58 44.76 1.92 PPM
BD+52 2916 21 19 58.80 +52 58 45.12 1.92 ACRS
WDS J21200+5259 AC 21 20 00.00 +52 58 59.88 2.09 WDS
WDS J21200+5259 AB 21 20 00.00 +52 58 59.88 2.09 WDS
CGPS J211959+530055 21 19 59.11 +53 00 55.08 3.99 CGPSNGPCAT
2 NVSS J211959+530056 21 19 59.81 +53 00 56.88 4.00 NVSS
3 CGPS J212010+530059 21 20 10.01 +53 01 00.12 4.10 CGPSNGPCAT
WN 2118.5+5240 21 20 12.70 +52 53 00.96 4.19 WENSS
4 NVSS J212012+525258 21 20 12.91 +52 52 59.16 4.24 NVSS
TGSSADR J212012.9+525258 21 20 12.91 +52 52 58.08 4.25 GMRTAS150M
CGPS J212012+525257 21 20 12.91 +52 52 57.00 4.26 CGPSNGPCAT
5 PPM 39348 21 19 30.70 +52 55 40.08 5.20 PPM
BD+52 2910 21 19 30.67 +52 55 39.72 5.20 ACRS
SAO 33319 21 19 30.65 +52 55 40.08 5.20 SAO
WDS J21195+5256 21 19 30.00 +52 55 59.88 5.22 WDS
CGPS J211934+525210 21 19 34.70 +52 52 10.92 6.54 CGPSNGPCAT
6 NVSS J211934+525207 21 19 34.49 +52 52 06.96 6.60 NVSS
7 WDS J21197+5303 21 19 42.00 +53 02 60.00 6.86 WDS
8 PPM 39352 21 19 40.78 +53 03 29.16 7.37 PPM
SAO 33323 21 19 40.78 +53 03 29.16 7.37 SAO
HIP 105298 21 19 40.75 +53 03 29.16 7.37 HIPPARCOS
HD 203320 21 19 40.78 +53 03 29.16 7.37 HIC
9 NVSS J212019+524953 21 20 19.90 +52 49 54.12 7.50 NVSS
CGPS J211924+530138 21 19 24.79 +53 01 39.00 7.52 CGPSNGPCAT
CGPS J212020+524953 21 20 20.21 +52 49 53.04 7.52 CGPSNGPCAT
10 NVSS J211924+530156 21 19 24.31 +53 01 57.00 7.76 NVSS
11 BD+52 2911 21 19 36.10 +53 03 52.56 8.06 ACRS
SAO 33321 21 19 36.14 +53 03 52.92 8.06 SAO
PPM 39349 21 19 36.12 +53 03 52.92 8.06 PPM
12 CGPS J212046+530401 21 20 46.20 +53 04 01.92 9.47 CGPSNGPCAT
CGPS J211907+530148 21 19 07.51 +53 01 49.08 9.78 CGPSNGPCAT
13 NVSS J211906+530150 21 19 07.01 +53 01 50.88 9.86 NVSS
14 NVSS J212057+530255 21 20 57.19 +53 02 54.96 9.95 NVSS
CGPS J212057+530256 21 20 57.91 +53 02 56.04 10.05 CGPSNGPCAT
CGPS J212113+525625 21 21 13.01 +52 56 25.08 10.41 CGPSNGPCAT
15 NVSS J212113+525623 21 21 13.20 +52 56 22.92 10.43 NVSS
16 CGPS J212115+525434 21 21 15.70 +52 54 33.84 11.07 CGPSNGPCAT
17 NVSS J211905+524921 21 19 05.21 +52 49 22.08 11.71 NVSS
TGSSADR J212113.6+524751 21 21 13.70 +52 47 52.08 13.92 GMRTAS150M
CGPS J212113+524749 21 21 13.61 +52 47 49.92 13.94 CGPSNGPCAT
WN 2119.6+5235 21 21 13.90 +52 47 51.00 13.95 WENSS
18 NVSS J212113+524751 21 21 13.90 +52 47 51.00 13.96 NVSS

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