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 J1858.3-5424

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1858.3-5424 Swift-XRT detections in the field for 4FGL J1858.3-5424

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 59 49.17 -54 26 26.57 4.02 (2.3 ± 0.3) x 10-3 100 7.907 7.734
2 18 58 35.40 -54 27 02.88 4.02 (1.7 ± 0.3) x 10-3 121 6.121 5.811
3 18 58 42.95 -54 17 02.98 4.01 (1.5 ± 0.3) x 10-3 84 6.066 5.488
4 18 58 07.49 -54 22 18.08 4.11 (1.1 ± 0.2) x 10-3 89 4.436 4.587
5 18 58 19.33 -54 20 22.40 4.25 (9 ± 2) x 10-4 64 3.654 3.936
6 18 57 30.44 -54 18 15.63 4.30 (8 ± 2) x 10-4 46 3.911 3.931
7 18 59 12.05 -54 32 51.01 4.24 (8 ± 2) x 10-4 41 3.886 3.720
8 18 58 48.71 -54 26 47.40 4.05 (7 ± 2) x 10-4 104 4.254 3.439
9 18 57 43.01 -54 14 27.89 4.60 (7 ± 2) x 10-4 26 3.482 3.405
10 18 57 59.20 -54 35 47.06 4.19 (7 ± 2) x 10-4 45 3.659 3.393
11 18 59 30.80 -54 21 40.54 4.26 (6 ± 2) x 10-4 39 3.145 3.281
12 18 57 46.72 -54 23 04.15 4.06 (6 ± 2) x 10-4 79 3.678 3.047

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 02.34 -54 15 33.25 4.29 (5 ± 2) x 10-4 47 2.899 2.848
2 18 57 47.18 -54 15 41.14 4.33 (5 ± 2) x 10-4 40 2.889 2.766
3 18 58 42.98 -54 17 02.26 4.01 (4 ± 2) x 10-4 89 2.740 2.204
4 18 58 51.47 -54 15 38.39 4.26 (4 ± 2) x 10-4 45 2.823 2.176
5 18 57 47.72 -54 34 00.05 4.17 (3 ± 2) x 10-4 48 3.036 1.876

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1858.3-5424 Swift-XRT image with known radio, optical and UV sources for 4FGL J1858.3-5424

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J185851.3-541532 18 58 51.36 -54 15 32.40 10.39 ROSAT
2RXS J185851.3-541532 18 58 51.36 -54 15 32.40 10.39 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 PPM 347301 18 58 07.73 -54 25 26.40 1.68 PPM
CD-54 8082 18 58 07.70 -54 25 26.76 1.69 ACRS
2 SUMSS J185729-542651 18 57 30.00 -54 26 52.08 7.33 SUMSS
3 SAO 245835 18 58 34.82 -54 16 37.56 8.47 SAO
CD-54 8087 18 58 34.70 -54 16 35.40 8.49 ACRS
PPM 347307 18 58 34.70 -54 16 35.40 8.49 PPM
4 SUMSS J185819-541422 18 58 19.01 -54 14 22.92 10.36 SUMSS
QORG J185819.0-541418 18 58 19.01 -54 14 17.88 10.44 QORGCAT
5 SUMSS J185929-542633 18 59 29.59 -54 26 33.00 10.53 SUMSS
6 ESO 185525-5425.7 18 59 30.00 -54 21 39.60 10.89 ESOUPPSALA
PGC 62648 18 59 30.10 -54 21 38.88 10.91 PGC2003
A1855-5425 18 59 30.19 -54 21 39.24 10.92 ZCAT
Unknown 18 59 30.19 -54 21 38.88 10.92 RC3
7 SUMSS J185711-542951 18 57 11.21 -54 29 51.00 11.01 SUMSS
8 SAO 245827 18 57 50.64 -54 14 03.84 11.41 SAO
CD-54 8079 18 57 50.66 -54 14 02.76 11.42 ACRS
PPM 347299 18 57 50.66 -54 14 02.40 11.43 PPM
9 GLEAM J185940-542721 18 59 40.70 -54 27 20.88 12.27 GLEAMEGCAT
10 A1852-5436 18 56 57.86 -54 32 56.04 14.26 ZCAT
A 1852-54 18 56 56.11 -54 32 49.92 14.42 RC3
PGC 62600 18 56 55.99 -54 32 49.92 14.43 PGC2003
ESO 185251-5436.7 18 56 55.92 -54 32 49.20 14.43 ESOUPPSALA

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