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 J1855.6-3603

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1855.6-3603 Swift-XRT detections in the field for 4FGL J1855.6-3603


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 55 07.10 -36 00 54.54 7.27 (2.8 ± 1.1) x 10-3 10 2.387 2.601

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1855.6-3603 Swift-XRT image with known radio, optical and UV sources for 4FGL J1855.6-3603

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1RXS J185533.8-360615 18 55 33.79 -36 06 15.12 2.84 ROSAT
2 2RXS J185459.3-360020 18 54 59.35 -36 00 20.16 8.79 ROSAT
2RXS J185459.3-360020 18 54 59.35 -36 00 20.16 8.79 ROSAT
1RXS J185459.1-360020 18 54 59.11 -36 00 20.16 8.84 ROSAT
3 2RXP J185556.1-355400 18 55 56.04 -35 53 60.00 10.22 ROSAT
1WGA J1855.9-3553 18 55 55.70 -35 53 48.48 10.38 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J185542-360428 18 55 42.31 -36 04 27.84 0.98 NVSS
2 NVSS J185558-360218 18 55 58.01 -36 02 17.88 3.97 NVSS
3 PGC 209183 18 55 13.20 -35 59 38.04 6.69 PGC2003
4 NVSS J185611-360713 18 56 11.21 -36 07 14.16 7.31 NVSS
5 CGMW 4-3847 18 55 46.01 -35 54 42.84 9.05 CGMW
6 NVSS J185555-355409 18 55 55.99 -35 54 09.00 10.07 NVSS
PGC 209245 18 55 56.30 -35 54 07.92 10.12 PGC2003
CGMW 4-3863 18 55 56.30 -35 54 07.92 10.12 CGMW
7 NVSS J185539-355321 18 55 39.31 -35 53 21.84 10.31 NVSS
8 PGC 209325 18 56 30.91 -36 05 26.16 10.52 PGC2003
9 CGMW 4-3781 18 55 03.19 -35 55 54.84 10.69 CGMW
10 PPM 750217 18 56 16.90 -36 11 44.52 11.05 PPM
SUMSS J185634-360114 18 56 34.10 -36 01 14.16 11.28 SUMSS
TGSSADR J185634.0-360108 18 56 34.01 -36 01 09.12 11.30 GMRTAS150M
11 NVSS J185634-360107 18 56 34.49 -36 01 06.96 11.39 NVSS
QORG J185617.2-355500 18 56 17.21 -35 55 00.12 11.53 QORGCAT
12 NVSS J185617-355459 18 56 17.21 -35 55 00.12 11.54 NVSS
13 NVSS J185529-361503 18 55 30.00 -36 15 03.96 11.56 NVSS
GLEAM J185635-360102 18 56 35.50 -36 01 03.00 11.60 GLEAMEGCAT
14 NVSS J185450-355623 18 54 50.69 -35 56 24.00 12.27 NVSS
15 PPM 750225 18 56 37.42 -36 09 20.88 12.99 PPM
GLEAM J185626-355421 18 56 26.50 -35 54 21.96 13.30 GLEAMEGCAT
16 NVSS J185627-355427 18 56 27.70 -35 54 27.00 13.41 NVSS
TGSSADR J185627.4-355421 18 56 27.50 -35 54 21.96 13.43 GMRTAS150M
SUMSS J185627-355417 18 56 27.70 -35 54 16.92 13.52 SUMSS
17 PPM 298343 18 56 20.28 -35 52 19.92 14.01 PPM
CD-3613143 18 56 20.26 -35 52 19.56 14.01 ACRS
Rns 49020 18 56 20.28 -35 52 19.56 14.02 CPSTARS
18 WDS J18563-3552 18 56 18.00 -35 52 00.12 14.02 WDS
SAO 210730 18 56 20.33 -35 52 19.56 14.02 SAO
19 CGMW 4-3951 18 56 34.80 -36 12 29.16 14.22 CGMW
20 CGMW 4-3943 18 56 28.80 -36 14 40.92 14.84 CGMW
21 PGC 209335 18 56 36.31 -35 51 39.96 16.61 PGC2003

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