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 J2021.9+3609

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J2021.9+3609 Swift-XRT detections in the field for 4FGL J2021.9+3609

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 20 22 09.51 +36 03 52.70 5.53 (5.0 ± 1.1) x 10-3 25 4.509 4.444
2 20 22 01.46 +36 11 06.62 5.11 (4.4 ± 1.0) x 10-3 37 4.459 4.289

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 20 23 25.12 +36 16 38.25 8.27 (1.2 ± 0.5) x 10-3 7 2.410 2.462

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J2021.9+3609 Swift-XRT image with known radio, optical and UV sources for 4FGL J2021.9+3609

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1RXS J202209.0+360404 20 22 09.00 +36 04 04.44 5.93 ROSAT
2RXS J202209.0+360401 20 22 09.00 +36 04 01.56 5.98 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 GB6 J2021+3611 20 21 58.61 +36 11 03.12 1.63 GB6
WN 2020.1+3601 20 22 01.01 +36 11 09.96 1.90 WENSS
2 NVSS J202201+361110 20 22 01.30 +36 11 09.96 1.94 NVSS
WSRTGP 2020+3601 20 22 01.61 +36 11 08.88 1.95 WSRTGP
TGSSADR J202201.4+361109 20 22 01.51 +36 11 09.96 1.96 GMRTAS150M
[WBH2005] G74.782-0.422 20 22 01.39 +36 11 11.04 1.96 WBHGP20CM
CGPS J202201+361110 20 22 01.39 +36 11 11.04 1.96 CGPSNGPCAT
3 CGPS J202218+361102 20 22 18.70 +36 11 02.04 4.71 CGPSNGPCAT
4 PPM 84802 20 22 06.89 +36 14 00.96 5.00 PPM
BD+35 4083 20 22 06.91 +36 14 00.96 5.00 ACRS
SAO 69909 20 22 06.86 +36 14 01.68 5.00 SAO
5 NVSS J202116+361040 20 21 16.30 +36 10 41.16 8.25 NVSS
6 SAO 69921 20 22 39.53 +36 05 16.08 9.61 SAO
PPM 84818 20 22 39.70 +36 05 14.64 9.65 PPM
BD+35 4087 20 22 39.74 +36 05 13.92 9.67 ACRS
7 CGPS J202214+355933 20 22 14.71 +35 59 34.08 10.55 CGPSNGPCAT
8 BD+35 4076 20 21 04.37 +36 10 05.88 10.59 ACRS
PPM 84764 20 21 04.34 +36 10 06.24 10.59 PPM
9 SAO 69896 20 21 40.78 +35 58 44.04 11.20 SAO
PPM 84791 20 21 40.90 +35 58 43.68 11.20 PPM
BD+35 4082 20 21 40.92 +35 58 42.96 11.21 ACRS
CGPS J202128+361937 20 21 28.70 +36 19 37.92 11.63 CGPSNGPCAT
10 NVSS J202128+361936 20 21 28.39 +36 19 36.84 11.65 NVSS
11 NVSS J202118+362100 20 21 18.60 +36 21 01.08 13.87 NVSS

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