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 J2218.8+4736

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J2218.8+4736 Swift-XRT detections in the field for 4FGL J2218.8+4736

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 22 18 28.86 +47 42 21.53 6.12 (8 ± 2) x 10-3 20 4.011 4.033

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J2218.8+4736 Swift-XRT image with known radio, optical and UV sources for 4FGL J2218.8+4736


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 WDS J22191+4740 22 19 06.00 +47 40 00.12 4.46 WDS
WN 2217.3+4722 22 19 24.70 +47 37 39.00 5.46 WENSS
2 NVSS J221925+473735 22 19 25.70 +47 37 36.12 5.61 NVSS
3 NVSS J221830+473050 22 18 30.29 +47 30 50.04 6.54 NVSS
4 NVSS J221926+472913 22 19 26.50 +47 29 13.92 8.79 NVSS
5 NVSS J221931+474300 22 19 31.80 +47 43 00.84 9.47 NVSS
6 NVSS J221923+472740 22 19 23.40 +47 27 39.96 9.75 NVSS
VLSSr J221936.9+474311 22 19 37.01 +47 43 10.92 10.20 VLSSR
TGSSADR J221936.8+474312 22 19 36.91 +47 43 13.08 10.20 GMRTAS150M
WN 2217.5+4728 22 19 37.01 +47 43 12.00 10.21 WENSS
TXS 2217+474 22 19 37.10 +47 43 12.00 10.22 TEXAS
7 NVSS J221937+474313 22 19 37.20 +47 43 13.08 10.24 NVSS
7C 221734.8+472810 22 19 37.30 +47 43 15.96 10.28 GP7C151MHZ
8 2217+4727 22 19 40.01 +47 42 46.08 10.28 NORTH6CM
9 2216+4712 22 18 22.99 +47 27 06.12 10.34 NORTH6CM
GB6 J2219+4743 22 19 36.50 +47 43 36.84 10.45 GB6
10 NVSS J221923+474552 22 19 23.71 +47 45 52.92 11.05 NVSS
WN 2216.2+4711 22 18 15.00 +47 26 57.84 11.19 WENSS
11 MCG+08-40-005 22 18 13.92 +47 45 03.60 11.23 MCG
12 NVSS J221814+472650 22 18 14.59 +47 26 51.00 11.33 NVSS
BD+47 3768 22 18 14.35 +47 45 15.48 11.35 ACRS
PPM 62759 22 18 14.30 +47 45 15.84 11.36 PPM
TGSSADR J221814.8+472645 22 18 14.81 +47 26 45.96 11.37 GMRTAS150M
SAO 51856 22 18 14.30 +47 45 17.64 11.38 SAO
13 NVSS J221937+472709 22 19 37.39 +47 27 09.00 11.55 NVSS
14 PGC 68532 22 18 17.11 +47 46 06.96 11.81 PGC2003
15 NVSS J221750+474133 22 17 50.90 +47 41 33.00 11.93 NVSS
16 NVSS J222003+473301 22 20 03.60 +47 33 01.08 12.17 NVSS
17 SAO 51884 22 19 58.66 +47 28 21.36 13.39 SAO
PPM 62787 22 19 58.75 +47 28 22.08 13.39 PPM
HD 211974 22 19 58.78 +47 28 22.08 13.40 HIC
BD+46 3665 22 19 58.80 +47 28 22.44 13.40 ACRS
HIP 110253 22 19 58.82 +47 28 21.72 13.41 HIPPARCOS

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