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 J1818.6+1316

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1818.6+1316 Swift-XRT detections in the field for 4FGL J1818.6+1316


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 18 23.38 +13 21 31.29 7.09 (2.6 ± 1.1) x 10-3 11 2.458 2.391

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1818.6+1316 Swift-XRT image with known radio, optical and UV sources for 4FGL J1818.6+1316


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 NGC 6615 18 18 36.00 +13 16 00.12 0.42 NGC2000
2 PGC 61713 18 18 33.50 +13 15 55.08 0.90 PGC2003
NGC 6615 18 18 33.50 +13 15 55.08 0.90 RC3
N6615 18 18 33.48 +13 15 55.08 0.90 ZCAT
UZC J181833.4+131554 18 18 33.41 +13 15 54.00 0.93 UZC
3 UGC 11196 18 18 30.02 +13 16 15.96 1.62 UGC
MCG+02-46-013 18 18 30.00 +13 16 15.60 1.62 MCG
4 PGC 2809246 18 18 47.11 +13 17 27.96 2.76 PGC2003
5 PGC 1428051 18 18 43.61 +13 19 05.16 3.18 PGC2003
PGC 1428179 18 18 44.21 +13 19 22.08 3.50 PGC2003
6 PGC 95741 18 18 48.70 +13 19 59.16 4.64 PGC2003
7 A1816+1319 18 18 49.90 +13 20 31.20 5.24 ZCAT
8 WDS J18190+1315 18 19 00.00 +13 15 00.00 5.85 WDS
TGSSADR J181759.6+131434 18 17 59.59 +13 14 34.08 9.18 GMRTAS150M
9 NVSS J181759+131436 18 17 59.30 +13 14 35.88 9.26 NVSS
10 BD+13 3598 18 18 41.62 +13 26 02.40 9.73 ACRS
PPM 134543 18 18 41.64 +13 26 02.40 9.73 PPM
SAO 103593 18 18 41.66 +13 26 02.76 9.74 SAO
11 PGC 1430207 18 18 12.91 +13 24 16.92 9.79 PGC2003
12 PGC 2809272 18 19 10.90 +13 24 33.84 11.68 PGC2003
13 PGC 1422407 18 18 31.01 +13 04 45.12 11.72 PGC2003
14 NVSS J181747+131632 18 17 47.59 +13 16 32.16 11.94 NVSS
15 PGC 2809182 18 17 47.90 +13 13 27.12 12.22 PGC2003

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