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 J1858.9+3636

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1858.9+3636 Swift-XRT detections in the field for 4FGL J1858.9+3636


No detected excesses found.

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 18 59 17.50 +36 29 14.11 9.05 (4 ± 2) x 10-3 6 2.257 2.224

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1858.9+3636 Swift-XRT image with known radio, optical and UV sources for 4FGL J1858.9+3636

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J185918.6+362916 18 59 18.62 +36 29 16.44 8.84 ROSAT
1RXS J185918.7+362915 18 59 18.70 +36 29 15.36 8.86 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J185833+364334 18 58 33.50 +36 43 33.96 8.09 NVSS
2 NVSS J185827+363037 18 58 27.91 +36 30 38.16 8.39 NVSS
3 NVSS J185824+364227 18 58 24.60 +36 42 27.00 8.43 NVSS
WN 1856.6+3626 18 58 27.10 +36 30 39.96 8.47 WENSS
4 BD+36 3360 18 59 42.24 +36 33 03.96 10.03 ACRS
PPM 82154 18 59 42.26 +36 33 03.96 10.03 PPM
SAO 67680 18 59 42.36 +36 33 04.32 10.05 SAO
5 PGC 2082934 18 59 45.41 +36 34 09.12 10.28 PGC2003
6 BD+36 3345 18 58 04.78 +36 36 05.76 10.30 ACRS
PPM 82114 18 58 04.78 +36 36 05.76 10.30 PPM
7 NVSS J185804+363225 18 58 04.49 +36 32 26.16 11.23 NVSS
TXS 1856+364 18 58 04.49 +36 32 25.08 11.23 TEXAS
TGSSADR J185804.5+363224 18 58 04.49 +36 32 24.00 11.24 GMRTAS150M
WN 1856.3+3628 18 58 04.49 +36 32 24.00 11.24 WENSS
8 PGC 2083935 18 59 52.80 +36 37 26.04 11.42 PGC2003
9 NVSS J185805+363016 18 58 04.99 +36 30 15.84 12.16 NVSS
10 NVSS J185915+362509 18 59 15.00 +36 25 09.84 12.30 NVSS
11 PGC 2087288 18 59 19.80 +36 48 15.84 12.38 PGC2003
12 PGC 62633 18 58 35.21 +36 25 05.88 12.47 PGC2003
WN 1857.4+3620 18 59 15.00 +36 24 54.00 12.54 WENSS
13 HD 176375 18 58 26.54 +36 25 34.32 12.73 HIC
SAO 67655 18 58 26.54 +36 25 34.32 12.73 SAO
HIP 93144 18 58 26.50 +36 25 32.88 12.76 HIPPARCOS
14 NVSS J185817+364720 18 58 17.30 +36 47 21.12 13.05 NVSS
15 WDS J18584+3625 18 58 24.00 +36 25 00.12 13.48 WDS
16 PGC 2080462 18 57 59.90 +36 25 41.88 15.85 PGC2003

Penn State University Goddard Space Flight Center Swift