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.

3FGL J1858.0-5423

Field

Detected Excesses
Swift-XRT image of the field for 3FGL J1858.0-5423 Swift-XRT detections in the field for 3FGL J1858.0-5423

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 58 35.97 -54 27 02.94 4.30 (2.2 ± 0.4) x 10-3 70 5.319 5.337
2 18 59 49.12 -54 26 26.72 4.88 (1.3 ± 0.3) x 10-3 33 4.168 4.469
3 18 58 07.13 -54 22 14.65 4.33 (1.5 ± 0.4) x 10-3 67 4.205 4.277
4 18 58 48.31 -54 26 41.60 4.33 (1.3 ± 0.3) x 10-3 58 4.270 4.012
5 18 58 43.17 -54 17 04.79 4.28 (1.4 ± 0.4) x 10-3 50 4.709 3.976
6 18 57 30.82 -54 18 11.06 4.37 (1.3 ± 0.3) x 10-3 53 4.208 3.758
7 18 57 43.41 -54 14 29.08 4.59 (1.3 ± 0.4) x 10-3 28 3.518 3.508

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 18.74 -54 20 26.69 4.71 (9 ± 3) x 10-4 36 2.885 2.920
2 18 59 30.80 -54 21 36.25 4.95 (7 ± 2) x 10-4 18 2.794 2.809
3 18 57 47.51 -54 23 03.25 4.40 (9 ± 3) x 10-4 54 3.233 2.732
4 18 57 48.87 -54 34 07.12 4.45 (6 ± 3) x 10-4 30 3.570 2.574
5 18 57 47.70 -54 15 46.95 4.50 (7 ± 3) x 10-4 42 3.011 2.382
6 18 57 35.86 -54 33 19.08 4.43 (6 ± 3) x 10-4 34 3.121 2.360
7 18 57 59.14 -54 35 41.39 4.59 (6 ± 2) x 10-4 27 2.517 2.297
8 18 58 52.51 -54 31 43.23 4.42 (5 ± 3) x 10-4 25 2.623 2.014

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 3FGL J1858.0-5423 Swift-XRT image with known radio, optical and UV sources for 3FGL J1858.0-5423

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 10.90 ROSAT
2RXS J185851.3-541532 18 58 51.36 -54 15 32.40 10.90 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 2.24 PPM
CD-54 8082 18 58 07.70 -54 25 26.76 2.24 ACRS
2 SUMSS J185729-542651 18 57 30.00 -54 26 52.08 5.54 SUMSS
3 SAO 245835 18 58 34.82 -54 16 37.56 8.52 SAO
CD-54 8087 18 58 34.70 -54 16 35.40 8.54 ACRS
PPM 347307 18 58 34.70 -54 16 35.40 8.54 PPM
4 SUMSS J185819-541422 18 58 19.01 -54 14 22.92 9.52 SUMSS
5 SAO 245827 18 57 50.64 -54 14 03.84 9.53 SAO
CD-54 8079 18 57 50.66 -54 14 02.76 9.55 ACRS
6 SUMSS J185711-542951 18 57 11.21 -54 29 51.00 9.55 SUMSS
PPM 347299 18 57 50.66 -54 14 02.40 9.55 PPM
QORG J185819.0-541418 18 58 19.01 -54 14 17.88 9.59 QORGCAT
7 A1852-5436 18 56 57.86 -54 32 56.04 13.08 ZCAT
A 1852-54 18 56 56.11 -54 32 49.92 13.19 RC3
ESO 185251-5436.7 18 56 55.92 -54 32 49.20 13.20 ESOUPPSALA
PGC 62600 18 56 55.99 -54 32 49.92 13.20 PGC2003

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