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 J1838.1-3352

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1838.1-3352 Swift-XRT detections in the field for 4FGL J1838.1-3352

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 38 27.45 -33 54 03.03 5.89 (4.6 ± 1.4) x 10-3 21 3.437 3.232

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 28.84 -33 46 39.50 6.31 (2.6 ± 1.1) x 10-3 14 2.837 2.370
2 18 37 56.03 -33 56 58.11 5.82 (2.4 ± 1.1) x 10-3 17 2.775 2.236

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1838.1-3352 Swift-XRT image with known radio, optical and UV sources for 4FGL J1838.1-3352

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 XMMSL2 J183806.7-334038 18 38 06.70 -33 40 38.28 11.52 XMM-NEWTON

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 V1312 Sgr 18 38 07.42 -33 50 31.20 1.68 GCVS
2 NVSS J183811-335410 18 38 11.30 -33 54 10.08 2.06 NVSS
SUMSS J183811-335414 18 38 11.50 -33 54 15.12 2.14 SUMSS
GLEAM J183814-335401 18 38 14.81 -33 54 01.08 2.16 GLEAMEGCAT
3 NVSS J183816-335408 18 38 16.49 -33 54 07.92 2.46 NVSS
4 PPM 749886 18 37 53.71 -33 52 27.12 3.33 PPM
5 V3689 Sgr 18 38 14.21 -33 47 44.88 4.49 GCVS
6 CGMW 4-2128 18 38 24.00 -33 55 59.16 4.86 CGMW
7 NVSS J183830-335444 18 38 30.70 -33 54 45.00 5.09 NVSS
8 NVSS J183833-335101 18 38 33.60 -33 51 01.08 5.10 NVSS
9 PGC 207576 18 38 38.30 -33 54 11.16 6.28 PGC2003
10 NVSS J183738-335502 18 37 38.59 -33 55 03.00 7.08 NVSS
11 CGMW 4-1980 18 37 35.21 -33 53 35.16 7.30 CGMW
12 PPM 749904 18 38 47.95 -33 54 09.72 8.19 PPM
13 PPM 297964 18 38 32.42 -33 59 53.52 9.08 PPM
CD-3412995 18 38 32.40 -33 59 53.88 9.08 ACRS
SAO 210392 18 38 32.52 -33 59 54.96 9.11 SAO
14 PGC 207470 18 38 01.39 -33 43 06.96 9.18 PGC2003
CGMW 4-2053 18 38 01.39 -33 43 06.96 9.18 CGMW
15 CGMW 4-2029 18 37 53.59 -34 01 14.88 9.71 CGMW
16 V3668 Sgr 18 37 26.81 -33 56 06.72 9.75 GCVS
17 CGMW 4-2093 18 38 09.41 -34 02 21.84 10.23 CGMW
PGC 207483 18 38 05.11 -33 41 56.04 10.25 PGC2003
18 NVSS J183805-334154 18 38 05.40 -33 41 54.96 10.26 NVSS
CGMW 4-2080 18 38 07.01 -34 02 24.00 10.28 CGMW
19 CGMW 4-1979 18 37 34.70 -33 44 40.92 10.41 CGMW
20 PGC 207497 18 38 07.20 -33 41 24.00 10.75 PGC2003
21 CGMW 4-2223 18 39 02.50 -33 53 31.92 11.05 CGMW
22 PGC 207413 18 37 42.31 -33 42 11.16 11.46 PGC2003
23 CGMW 4-1966 18 37 30.70 -34 01 14.16 12.18 CGMW
24 V444 Sgr 18 39 06.65 -33 48 01.80 12.52 GCVS
25 PGC 207381 18 37 28.80 -33 42 50.04 12.60 PGC2003
26 SAO 210376 18 37 36.60 -33 41 29.04 12.68 SAO
PPM 297949 18 37 36.43 -33 41 30.48 12.68 PPM
CD-3313399 18 37 36.43 -33 41 30.12 12.68 ACRS
27 CGMW 4-2226 18 39 04.61 -33 43 32.16 14.29 CGMW

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