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 J1640.3-4917

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1640.3-4917 Swift-XRT detections in the field for 4FGL J1640.3-4917


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 16 40 34.81 -49 08 33.18 6.21 (2.4 ± 1.1) x 10-3 9 2.291 2.212
2 16 41 02.86 -49 18 45.72 7.09 (1.9 ± 1.0) x 10-3 9 2.306 2.058

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1640.3-4917 Swift-XRT image with known radio, optical and UV sources for 4FGL J1640.3-4917

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1WGA J1639.8-4912 16 39 49.01 -49 13 19.92 6.27 ROSAT
2 1WGA J1640.8-4924 16 40 53.40 -49 25 28.56 9.93 ROSAT
3 2CXO J164054.7-490803 16 40 54.77 -49 08 03.48 10.99 CHANDRA
4 2CXO J164038.0-490639 16 40 38.09 -49 06 39.24 11.13 CHANDRA
5 2CXO J164111.8-490626 16 41 11.88 -49 06 26.64 13.93 CHANDRA

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 [SPT2015] ATCA J1640-4914 16 40 21.91 -49 14 45.96 2.61 FER2FUSRID
2 CD-4910872 16 40 29.47 -49 20 56.76 4.03 ACRS
PPM 322017 16 40 29.57 -49 20 56.40 4.03 PPM
SAO 227031 16 40 29.59 -49 20 57.48 4.05 SAO
3 [SPT2015] ATCA J1640-4913 16 40 35.59 -49 13 09.84 5.00 FER2FUSRID
4 HD 331035 B 16 39 47.14 -49 20 44.52 6.17 HDEC
HD 331035 A 16 39 46.63 -49 20 51.36 6.30 HDEC
5 SAO 227012 16 39 43.80 -49 21 02.16 6.78 SAO
PPM 322000 16 39 43.61 -49 21 01.80 6.81 PPM
CD-4910860 16 39 43.56 -49 21 01.80 6.81 ACRS
WDS J16397-4921 AB 16 39 42.00 -49 21 00.00 7.01 WDS
WDS J16397-4921 AC 16 39 42.00 -49 21 00.00 7.01 WDS
WDS J16397-4921 BD 16 39 42.00 -49 21 00.00 7.01 WDS
6 [SPT2015] ATCA J1639-4914 16 39 35.21 -49 14 47.04 7.53 FER2FUSRID
MGPS J163934-491443 16 39 34.70 -49 14 44.16 7.62 MGPS2
7 SAO 227018 16 39 56.16 -49 10 37.92 7.63 SAO
PPM 322004 16 39 56.06 -49 10 38.28 7.63 PPM
CD-4811037 16 39 56.09 -49 10 38.28 7.63 ACRS
8 PMN J1640-4912 16 40 58.61 -49 12 02.88 8.39 PMN
9 MGPS J164114-491624 16 41 14.59 -49 16 24.96 9.18 MGPS2
10 TGSSADR J164026.6-492639 16 40 26.59 -49 26 39.84 9.44 GMRTAS150M
MGPS J164026-492641 16 40 26.71 -49 26 40.92 9.46 MGPS2
[SPT2015] ATCA J1640-4926 16 40 26.40 -49 26 44.88 9.51 FER2FUSRID
11 SAO 227029 16 40 27.24 -49 07 17.40 10.13 SAO
CD-4811048 16 40 27.17 -49 07 16.32 10.15 ACRS
PPM 322015 16 40 27.24 -49 07 15.96 10.15 PPM
12 [SPT2015] ATCA J1640-4927 16 40 39.41 -49 27 15.12 10.48 FER2FUSRID
MGPS J164039-492718 16 40 39.60 -49 27 18.00 10.55 MGPS2
13 TGSSADR J164040.5-492744 16 40 40.61 -49 27 43.92 11.01 GMRTAS150M
14 HD 331036 16 39 51.74 -49 27 51.12 11.40 HDEC
15 [SPT2015] ATCA J1640-4928 16 40 42.10 -49 28 23.16 11.70 FER2FUSRID
16 [SPT2015] ATCA J1639-4923 16 39 08.59 -49 23 22.92 12.92 FER2FUSRID

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