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 J1657.7-4520

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1657.7-4520 Swift-XRT detections in the field for 4FGL J1657.7-4520


No detected excesses found.

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1657.7-4520 Swift-XRT image with known radio, optical and UV sources for 4FGL J1657.7-4520


No known X-ray or gamma ray sources found.

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 HIP 83001 16 57 40.25 -45 20 49.20 1.38 HIPPARCOS
HD 152798 16 57 40.25 -45 20 49.20 1.38 HIC
CD-4511092 16 57 40.20 -45 20 48.84 1.39 ACRS
SAO 227494 16 57 40.01 -45 20 43.44 1.39 SAO
PPM 322462 16 57 40.18 -45 20 48.84 1.39 PPM
2 MGPS J165809-451900 16 58 09.10 -45 19 00.12 4.00 MGPS2
TGSSADR J165809.5-451902 16 58 09.50 -45 19 03.00 4.07 GMRTAS150M
3 PMN J1657-4524 16 57 42.29 -45 24 29.16 4.29 PMN
4 TGSSADR J165721.0-451826 16 57 21.00 -45 18 27.00 5.01 GMRTAS150M
MGPS J165720-451822 16 57 20.59 -45 18 23.04 5.11 MGPS2
5 HD 329238 16 57 16.32 -45 23 19.68 6.27 HDEC
6 PMN J1657-4528 16 57 46.61 -45 28 35.04 8.29 PMN
7 SAO 227489 16 57 22.08 -45 12 59.04 8.57 SAO
CD-4511083 16 57 22.03 -45 12 58.68 8.58 ACRS
PPM 322459 16 57 22.01 -45 12 58.32 8.59 PPM
8 HEN1295 16 58 29.86 -45 24 51.48 8.73 WACKERLING
9 PMN J1658-4528 16 58 13.01 -45 28 17.04 9.16 PMN
10 340- 6 16 56 56.40 -45 17 39.84 9.36 NLTT
11 SAO 227512 16 58 37.66 -45 26 02.76 10.52 SAO
HD 329239 16 58 37.66 -45 26 03.48 10.52 HDEC
PPM 322478 16 58 37.66 -45 26 03.48 10.52 PPM
NN 16 58 37.68 -45 26 03.48 10.53 ACRS
12 HD 329237 16 56 46.54 -45 22 41.88 10.98 HDEC
13 PPM 762337 16 57 07.61 -45 29 03.48 11.22 PPM
HD 329253 16 57 07.58 -45 29 04.20 11.23 HDEC
14 HD 329254 16 57 04.13 -45 29 12.84 11.73 HDEC
15 PPM 762363 16 58 21.58 -45 10 06.60 11.82 PPM
HD 329232 16 58 21.62 -45 10 02.64 11.88 HDEC
16 HD 329240 16 58 51.70 -45 26 24.36 12.82 HDEC
17 PMN J1658-4530 16 58 48.10 -45 30 52.92 15.01 PMN

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