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 J1818.1-2000

Field

Detected Excesses

Swift-XRT image of the field for 4FGL J1818.1-2000 Swift-XRT detections in the field for 4FGL J1818.1-2000


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 16 52.64 -19 54 09.86 8.27 (2.2 ± 1.1) x 10-3 6 2.187 2.040

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1818.1-2000 Swift-XRT image with known radio, optical and UV sources for 4FGL J1818.1-2000


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 NVSS J181805-200356 18 18 05.50 -20 03 56.16 3.03 NVSS
TGSSADR J181805.3-200359 18 18 05.30 -20 04 00.12 3.09 GMRTAS150M
2 NVSS J181746-195958 18 17 46.51 -19 59 58.92 5.13 NVSS
3 NVSS J181826-195532 18 18 26.59 -19 55 32.16 6.99 NVSS
4 PPM 733851 18 18 39.65 -20 02 45.96 7.67 PPM
5 NVSS J181825-195333 18 18 25.39 -19 53 34.08 8.47 NVSS
TGSSADR J181806.1-195203 18 18 06.10 -19 52 04.08 8.91 GMRTAS150M
6 NVSS J181806-195202 18 18 06.10 -19 52 01.92 8.94 NVSS
7 PGCC G11.43-1.83 18 17 31.01 -19 54 34.92 10.76 PLANCKGCC
8 PPM 733854 18 18 50.33 -20 05 38.40 11.01 PPM
9 V4048 Sgr 18 17 31.27 -20 08 40.20 11.55 GCVS
10 HD 313102 18 18 14.95 -19 49 31.08 11.57 HDEC
11 NVSS J181722-195305 18 17 22.70 -19 53 06.00 13.22 NVSS

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