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 J2040.1-3137

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J2040.1-3137 Swift-XRT detections in the field for 4FGL J2040.1-3137

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 20 40 09.94 -31 47 46.99 5.11 (6.5 ± 1.3) x 10-3 35 5.406 5.209
2 20 40 24.73 -31 35 50.99 5.70 (3.6 ± 1.0) x 10-3 24 3.562 3.514
3 20 39 44.88 -31 42 39.95 5.76 (2.8 ± 0.9) x 10-3 22 3.315 3.139
4 20 39 51.75 -31 43 32.40 5.14 (2.9 ± 1.0) x 10-3 23 3.655 3.040

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J2040.1-3137 Swift-XRT image with known radio, optical and UV sources for 4FGL J2040.1-3137

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1RXS J204026.1-312708 20 40 26.11 -31 27 08.64 11.05 ROSAT
2 2RXS J204051.6-312952 20 40 51.65 -31 29 52.44 12.08 ROSAT
2RXS J204051.6-312952 20 40 51.65 -31 29 52.44 12.08 ROSAT
1RXS J204051.4-312946 20 40 51.41 -31 29 45.96 12.11 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 DENISP_G_J2040178-313706 20 40 17.81 -31 37 05.88 2.23 DENISIGAL
PGC 162573 20 40 17.90 -31 37 05.88 2.25 PGC2003
2 PGC 703419 20 40 19.51 -31 35 35.16 3.17 PGC2003
3 PGC 703233 20 40 23.90 -31 36 32.04 3.61 PGC2003
4 PGC 703313 20 40 27.10 -31 36 09.00 4.38 PGC2003
5 ABELL3704 20 40 24.48 -31 34 59.16 4.38 ABELL
6 NVSS J204033-314051 20 40 33.19 -31 40 51.96 6.45 NVSS
7 PGC 162567 20 40 05.59 -31 30 56.88 6.52 PGC2003
DENISP_G_J2040056-313056 20 40 05.59 -31 30 56.16 6.53 DENISIGAL
8 PGC 701971 20 40 25.39 -31 42 51.12 6.60 PGC2003
9 NVSS J203948-313150 20 39 48.70 -31 31 50.16 6.90 NVSS
10 PGC 702220 20 40 37.01 -31 41 36.96 7.53 PGC2003
11 NVSS J204050-314028 20 40 50.59 -31 40 28.92 9.66 NVSS
SUMSS J204057-313408 20 40 57.31 -31 34 08.04 11.10 SUMSS
QORG J204057.3-313409 20 40 57.31 -31 34 09.12 11.11 QORGCAT
12 NVSS J204057-313406 20 40 57.50 -31 34 06.96 11.15 NVSS
13 PGC 705210 20 40 11.40 -31 26 02.04 11.46 PGC2003
14 NVSS J204059-314123 20 41 00.00 -31 41 22.92 11.84 NVSS
GLEAM J203931-314701 20 39 31.61 -31 47 02.04 12.25 GLEAMEGCAT
SUMSS J203929-314659 20 39 29.71 -31 46 59.16 12.47 SUMSS
15 NVSS J203929-314702 20 39 29.81 -31 47 02.04 12.49 NVSS
TGSSADR J203929.7-314703 20 39 29.81 -31 47 03.84 12.52 GMRTAS150M
16 NVSS J204041-314825 20 40 41.21 -31 48 24.84 13.10 NVSS
SUMSS J204041-314827 20 40 41.11 -31 48 28.08 13.12 SUMSS
GLEAM J204041-314839 20 40 41.11 -31 48 38.88 13.28 GLEAMEGCAT
TGSSADR J204041.8-314833 20 40 41.81 -31 48 33.12 13.29 GMRTAS150M
17 PGC 705298 20 39 34.61 -31 25 33.96 13.80 PGC2003
TGSSADR J203916.3-312808 20 39 16.30 -31 28 09.12 14.34 GMRTAS150M
18 NVSS J203916-312806 20 39 16.39 -31 28 05.88 14.35 NVSS
GLEAM J203916-312802 20 39 16.49 -31 28 01.92 14.37 GLEAMEGCAT
SUMSS J203916-312806 20 39 16.10 -31 28 06.96 14.39 SUMSS

Penn State University Goddard Space Flight Center Swift