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.

3FGL J1838.1+3827

Field

Detected Excesses

Swift-XRT image of the field for 3FGL J1838.1+3827 Swift-XRT detections in the field for 3FGL J1838.1+3827


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 38 27.96 +38 18 17.31 7.27 (2.7 ± 1.0) x 10-3 10 2.525 2.785
2 18 38 25.36 +38 11 50.22 5.59 (3.3 ± 1.3) x 10-3 11 2.708 2.574
3 18 38 27.73 +38 27 00.44 6.31 (2.0 ± 1.0) x 10-3 16 2.325 2.150
4 18 37 50.49 +38 15 32.64 6.78 (1.8 ± 0.8) x 10-3 10 2.341 2.147
5 18 37 34.87 +38 30 23.75 6.31 (1.9 ± 0.9) x 10-3 9 2.470 2.120
6 18 38 28.08 +38 27 02.03 6.21 (2.1 ± 1.0) x 10-3 17 2.656 2.069

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 3FGL J1838.1+3827 Swift-XRT image with known radio, optical and UV sources for 3FGL J1838.1+3827

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1WGA J1838.8+3832 18 38 49.70 +38 32 09.24 8.57 ROSAT
2 1WGA J1837.8+3835 18 37 49.61 +38 35 48.12 9.12 ROSAT
3 1RXS J183729.0+382151 18 37 28.99 +38 21 51.48 10.30 ROSAT
2RXS J183729.0+382149 18 37 28.99 +38 21 50.04 10.32 ROSAT
2RXS J183729.0+382149 18 37 28.99 +38 21 50.04 10.32 ROSAT
4 1WGA J1837.6+3819 18 37 37.51 +38 19 27.48 10.74 ROSAT
5 1WGA J1838.8+3836 18 38 48.91 +38 36 10.80 11.06 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
WN 1836.4+3822 18 38 09.91 +38 25 23.16 2.46 WENSS
1 NVSS J183809+382517 18 38 09.70 +38 25 18.12 2.55 NVSS
2 PGC 2130100 18 38 43.70 +38 32 58.92 8.09 PGC2003
3 NVSS J183848+382200 18 38 48.41 +38 22 00.12 9.20 NVSS
4 WDS J18385+3837 AC 18 38 30.00 +38 37 00.12 9.85 WDS
WDS J18385+3837 AB 18 38 30.00 +38 37 00.12 9.85 WDS
5 NVSS J183836+383658 18 38 36.19 +38 36 59.04 10.33 NVSS
6 [SPT2015] VLA J1838+3816 18 38 08.71 +38 16 06.96 11.70 FER2FUSRID
WN 1837.3+3833A 18 39 00.79 +38 34 54.12 11.90 WENSS
TGSSADR J183900.4+383515 18 39 00.50 +38 35 15.00 12.06 GMRTAS150M
7 NVSS J183900+383517 18 39 00.41 +38 35 17.16 12.07 NVSS
WN 1836.8+3813 18 38 31.80 +38 16 13.08 12.23 WENSS
8 NVSS J183832+381611 18 38 31.99 +38 16 10.92 12.27 NVSS
TGSSADR J183832.0+381609 18 38 31.99 +38 16 09.84 12.29 GMRTAS150M
9 PGC 2125295 18 39 09.79 +38 22 41.88 12.43 PGC2003
TGSSADR J183722.1+381921 18 37 22.10 +38 19 22.08 12.91 GMRTAS150M
10 NVSS J183721+381923 18 37 21.79 +38 19 23.16 12.94 NVSS
WN 1835.6+3816 18 37 22.30 +38 19 14.88 12.96 WENSS
WN 1837.3+3833 18 39 02.40 +38 36 28.08 13.13 WENSS
11 NVSS J183733+383831 18 37 33.10 +38 38 31.92 13.14 NVSS
TGSSADR J183733.1+383831 18 37 33.10 +38 38 31.92 13.15 GMRTAS150M
WN 1835.8+3835 18 37 32.81 +38 38 36.96 13.25 WENSS
12 NVSS J183902+383651 18 39 02.69 +38 36 51.12 13.43 NVSS
13 TXS 1835+386 18 37 37.70 +38 39 29.88 13.48 TEXAS
WN 1837.3+3833B 18 39 02.90 +38 36 52.92 13.48 WENSS
TGSSADR J183903.1+383651 18 39 03.10 +38 36 51.84 13.50 GMRTAS150M
14 PGC 2122408 18 37 11.59 +38 16 01.92 16.69 PGC2003

Penn State University Goddard Space Flight Center Swift