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 J1838.5+3837

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1838.5+3837 Swift-XRT detections in the field for 4FGL J1838.5+3837

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 38 44.23 +38 50 03.54 6.93 (6 ± 2) x 10-3 13 3.350 3.340

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 37 48.94 +38 42 03.20 7.71 (2.9 ± 1.2) x 10-3 9 2.381 2.351

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1838.5+3837 Swift-XRT image with known radio, optical and UV sources for 4FGL J1838.5+3837

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1WGA J1838.8+3836 18 38 48.91 +38 36 10.80 3.08 ROSAT
2 2RXP J183825.6+384148 18 38 25.54 +38 41 48.12 5.05 ROSAT
1WGA J1838.4+3841 18 38 24.41 +38 41 53.52 5.21 ROSAT
3 1WGA J1838.8+3832 18 38 49.70 +38 32 09.24 5.77 ROSAT
4 1WGA J1837.8+3835 18 37 49.61 +38 35 48.12 8.70 ROSAT
5 2CXO J183748.5+384201 18 37 48.58 +38 42 01.80 10.14 CHANDRA
2RXP J183747.7+384146 18 37 47.74 +38 41 45.96 10.16 ROSAT
1BMW 183748.3+384201 18 37 48.26 +38 42 01.44 10.19 ROSAT
1WGA J1837.7+3842 18 37 47.50 +38 42 07.20 10.37 ROSAT
6 CXOGSG J183743.6+384455 18 37 43.63 +38 44 55.32 12.58 CHANDRA

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J183836+383658 18 38 36.19 +38 36 59.04 0.48 NVSS
2 WDS J18385+3837 AC 18 38 30.00 +38 37 00.12 0.73 WDS
WDS J18385+3837 AB 18 38 30.00 +38 37 00.12 0.73 WDS
3 PGC 2130100 18 38 43.70 +38 32 58.92 4.47 PGC2003
4 QORG J183825.0+384149 18 38 25.01 +38 41 48.84 5.10 QORGCAT
QORG J183824.2+384150 18 38 24.19 +38 41 49.92 5.17 QORGCAT
5 NVSS J183900+383517 18 39 00.41 +38 35 17.16 5.49 NVSS
TGSSADR J183900.4+383515 18 39 00.50 +38 35 15.00 5.51 GMRTAS150M
WN 1837.3+3833 18 39 02.40 +38 36 28.08 5.63 WENSS
6 NVSS J183902+383651 18 39 02.69 +38 36 51.12 5.67 NVSS
WN 1837.3+3833A 18 39 00.79 +38 34 54.12 5.70 WENSS
WN 1837.3+3833B 18 39 02.90 +38 36 52.92 5.70 WENSS
TGSSADR J183903.1+383651 18 39 03.10 +38 36 51.84 5.74 GMRTAS150M
7 PPM 81579 18 38 00.58 +38 45 48.24 10.92 PPM
BD+38 3241 18 38 00.55 +38 45 48.24 10.92 ACRS
8 TXS 1835+386 18 37 37.70 +38 39 29.88 11.23 TEXAS
9 NVSS J183733+383831 18 37 33.10 +38 38 31.92 11.93 NVSS
TGSSADR J183733.1+383831 18 37 33.10 +38 38 31.92 11.94 GMRTAS150M
WN 1835.8+3835 18 37 32.81 +38 38 36.96 12.00 WENSS
WN 1836.4+3822 18 38 09.91 +38 25 23.16 12.53 WENSS
10 NVSS J183809+382517 18 38 09.70 +38 25 18.12 12.62 NVSS
11 NVSS J183918+384624 18 39 19.01 +38 46 24.96 12.90 NVSS

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