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 J1858.5-4446

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1858.5-4446 Swift-XRT detections in the field for 4FGL J1858.5-4446


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 50.18 -44 38 28.26 5.00 (3.3 ± 1.3) x 10-3 22 2.771 2.643
2 18 58 35.62 -44 55 32.21 4.56 (4 ± 2) x 10-3 33 3.040 2.631
3 18 57 38.44 -44 52 23.70 4.78 (3.1 ± 1.2) x 10-3 19 2.746 2.568
4 18 58 55.09 -44 41 41.53 4.97 (2.2 ± 1.1) x 10-3 17 2.884 2.119
5 18 58 53.65 -44 48 38.24 4.56 (2.6 ± 1.3) x 10-3 41 2.716 2.073
6 18 58 12.08 -44 53 31.87 4.64 (2.4 ± 1.2) x 10-3 29 2.667 1.971

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1858.5-4446 Swift-XRT image with known radio, optical and UV sources for 4FGL J1858.5-4446


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 PGC 533710 18 58 51.70 -44 46 50.88 3.23 PGC2003
2 CGMW 4-4155 18 58 37.39 -44 51 11.88 4.93 CGMW
3 CGMW 4-4105 18 58 08.40 -44 41 13.92 6.79 CGMW
PGC 534394 18 59 07.51 -44 43 06.96 6.79 PGC2003
4 SUMSS J185908-444312 18 59 07.99 -44 43 13.08 6.83 SUMSS
5 PPM 764031 18 57 57.14 -44 44 06.36 6.87 PPM
6 CGMW 4-4235 18 59 10.39 -44 43 35.04 7.05 CGMW
7 CGMW 4-4245 18 59 14.90 -44 43 39.00 7.77 CGMW
8 CGMW 4-4081 18 57 56.40 -44 41 13.92 8.36 CGMW
9 SUMSS J185846-443755 18 58 46.49 -44 37 55.92 8.68 SUMSS
TGSSADR J185846.4-443752 18 58 46.39 -44 37 51.96 8.73 GMRTAS150M
10 WDS J18583-4438 18 58 18.00 -44 37 59.88 8.77 WDS
GLEAM J185847-443741 18 58 47.40 -44 37 41.88 8.95 GLEAMEGCAT
11 CD-4512894 18 58 34.97 -44 56 09.60 9.85 ACRS
PPM 764038 18 58 34.97 -44 56 09.60 9.85 PPM
12 PPM 324620 18 57 40.06 -44 50 18.24 10.33 PPM
13 CGMW 4-4193 18 58 52.39 -44 35 56.04 10.89 CGMW
14 DENISP_G_J1859377-444440 18 59 37.70 -44 44 39.84 11.47 DENISIGAL
15 PGC 535680 18 58 55.99 -44 35 26.88 11.56 PGC2003
16 PPM 324633 18 58 40.30 -44 34 20.28 12.03 PPM
CD-4413005 18 58 40.27 -44 34 19.92 12.03 ACRS
17 HIP 93096 18 57 56.64 -44 58 06.24 13.50 HIPPARCOS
PPM 324627 18 57 56.69 -44 58 06.96 13.51 PPM
HD 175531 18 57 56.64 -44 58 06.96 13.52 HIC
WDS J18579-4458 18 57 54.00 -44 58 00.12 13.65 WDS
18 PGC 535493 18 59 30.00 -44 36 30.96 13.99 PGC2003
19 TGSSADR J185726.4-445414 18 57 26.50 -44 54 15.12 14.33 GMRTAS150M
SUMSS J185726-445419 18 57 26.50 -44 54 19.08 14.37 SUMSS
QORG J185726.4-445419 18 57 26.40 -44 54 19.08 14.38 QORGCAT

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