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 J1959.9+1833

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1959.9+1833 Swift-XRT detections in the field for 4FGL J1959.9+1833

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 19 59 19.02 +18 35 58.44 4.95 (8.0 ± 1.4) x 10-3 37 5.748 5.571

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 00 06.57 +18 28 05.67 7.71 (1.7 ± 0.7) x 10-3 9 2.298 2.382
2 20 00 33.01 +18 41 42.78 5.76 (1.8 ± 0.8) x 10-3 13 2.967 2.252
3 19 59 29.44 +18 36 08.14 5.82 (1.4 ± 0.7) x 10-3 17 2.537 1.983
4 19 59 16.58 +18 37 02.91 5.31 (1.5 ± 0.8) x 10-3 17 2.681 1.935

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1959.9+1833 Swift-XRT image with known radio, optical and UV sources for 4FGL J1959.9+1833


No known X-ray or gamma ray sources found.

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 MITG J2000+1831a 20 00 11.30 +18 31 21.00 3.92 MITGB6CM
1957+1823 20 00 13.39 +18 31 48.00 4.14 NORTH20CM
1957+1823 20 00 13.39 +18 31 48.00 4.14 NORTH6CM
MITG J2000+1831b 20 00 12.70 +18 31 24.96 4.17 MITGB6CM
2 NSV 12666 20 00 06.31 +18 37 10.92 4.18 GCVSNSVARS
GB6 J2000+1831 20 00 13.80 +18 31 51.96 4.19 GB6
TXS 1957+183 20 00 14.11 +18 31 59.88 4.19 TEXAS
3 NVSS J200014+183201 20 00 14.11 +18 32 02.04 4.20 NVSS
TGSSADR J200014.0+183200 20 00 14.11 +18 31 59.88 4.20 GMRTAS150M
VLSSr J200014.3+183201 20 00 14.40 +18 32 00.96 4.26 VLSSR
4 HD 351069 20 00 15.48 +18 30 33.48 5.19 HDEC
5 NVSS J200004+182639 20 00 04.61 +18 26 39.84 7.08 NVSS
6 HD 351064 19 59 45.10 +18 40 26.04 7.50 HDEC
7 HD 351066 20 00 21.74 +18 38 43.80 7.72 HDEC
8 PGCC G57.18-5.95 19 59 43.90 +18 25 59.88 8.21 PLANCKGCC
9 HD 351068 20 00 27.00 +18 28 29.28 8.61 HDEC
10 HD 351065 20 00 09.46 +18 42 29.52 9.38 HDEC
BD+18 4346 20 00 09.48 +18 42 29.52 9.38 ACRS
PPM 137390 20 00 09.46 +18 42 29.52 9.38 PPM
SAO 105526 20 00 09.60 +18 42 29.16 9.38 SAO
11 HD 351070 20 00 20.95 +18 25 49.08 9.51 HDEC
12 HD 351067 20 00 34.56 +18 28 45.12 9.99 HDEC
13 NVSS J200004+182320 20 00 04.70 +18 23 21.12 10.34 NVSS
14 HD 351218 20 00 43.92 +18 34 18.12 11.00 HDEC
15 NVSS J195924+184226 19 59 24.91 +18 42 25.92 11.79 NVSS
16 NVSS J195908+184009 19 59 08.30 +18 40 09.12 13.42 NVSS
17 NSV 12654 19 59 16.10 +18 44 49.92 14.97 GCVSNSVARS
18 NSV 12649 19 59 07.10 +18 44 18.96 16.10 GCVSNSVARS

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