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 J1857.8-3220

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1857.8-3220 Swift-XRT detections in the field for 4FGL J1857.8-3220


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 18 58 17.26 -32 10 20.95 7.09 (3 ± 2) x 10-3 9 2.401 2.316

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1857.8-3220 Swift-XRT image with known radio, optical and UV sources for 4FGL J1857.8-3220


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 NVSS J185757-321809 18 57 57.31 -32 18 09.00 3.10 NVSS
2 NVSS J185732-322159 18 57 32.81 -32 21 59.04 3.72 NVSS
3 PGC 209440 18 57 46.10 -32 24 47.88 4.09 PGC2003
4 PGC 209499 18 58 15.00 -32 18 32.04 5.85 PGC2003
5 NVSS J185820-322140 18 58 20.69 -32 21 39.96 6.66 NVSS
6 PPM 750260 18 58 17.23 -32 16 59.16 6.99 PPM
7 SAO 210767 18 58 08.23 -32 14 49.92 7.14 SAO
PPM 298382 18 58 08.16 -32 14 48.84 7.15 PPM
CD-3214716 18 58 08.16 -32 14 48.84 7.15 ACRS
SUMSS J185824-322442 18 58 24.70 -32 24 42.84 8.43 SUMSS
8 NVSS J185825-322435 18 58 25.01 -32 24 34.92 8.44 NVSS
TGSSADR J185824.8-322443 18 58 24.79 -32 24 42.84 8.46 GMRTAS150M
SUMSS J185824-321601 18 58 24.70 -32 16 01.92 8.84 SUMSS
TGSSADR J185824.7-321559 18 58 24.79 -32 15 59.04 8.87 GMRTAS150M
9 NVSS J185824-321557 18 58 24.70 -32 15 57.96 8.88 NVSS
GLEAM J185824-321546 18 58 24.79 -32 15 47.16 8.99 GLEAMEGCAT
10 CGMW 4-4069 18 57 51.10 -32 11 18.96 9.46 CGMW
11 NVSS J185821-321346 18 58 21.19 -32 13 45.84 9.70 NVSS
12 CGMW 4-4031 18 57 22.61 -32 12 20.88 10.15 CGMW
13 NVSS J185705-322516 18 57 05.21 -32 25 17.04 10.37 NVSS
14 NVSS J185743-321016 18 57 43.01 -32 10 17.04 10.58 NVSS
15 NVSS J185710-321301 18 57 10.70 -32 13 00.84 11.27 NVSS
16 V475 Sgr 18 58 41.02 -32 24 35.28 11.55 GCVS
17 PGC 209441 18 57 46.30 -32 32 24.00 11.65 PGC2003
18 SAO 210771 18 58 17.30 -32 10 34.68 11.77 SAO
HD 175778 18 58 17.28 -32 10 32.88 11.79 HIC
19 NVSS J185737-323218 18 57 37.80 -32 32 18.96 11.80 NVSS
PPM 298389 18 58 17.30 -32 10 32.52 11.80 PPM
CD-3214722 18 58 17.30 -32 10 32.52 11.80 ACRS
HIP 93126 18 58 17.28 -32 10 31.80 11.81 HIPPARCOS
20 NVSS J185843-321629 18 58 43.01 -32 16 30.00 12.11 NVSS
PPM 750275 18 58 41.59 -32 14 44.88 12.56 PPM
21 NVSS J185841-321434 18 58 41.59 -32 14 34.08 12.64 NVSS
22 PGC 209373 18 56 55.99 -32 13 49.08 13.26 PGC2003
23 SAO 210774 18 58 24.19 -32 32 17.88 13.67 SAO
CD-3214725 18 58 24.48 -32 32 18.24 13.71 ACRS
PPM 298391 18 58 24.53 -32 32 18.60 13.72 PPM
24 PGC 209367 18 56 53.71 -32 29 21.84 14.57 PGC2003
25 NVSS J185841-323052 18 58 41.30 -32 30 51.84 14.90 NVSS

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