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.

1FGL J1539.0-3328

Field

Detected Excesses

Swift-XRT image of the field for 1FGL J1539.0-3328 Swift-XRT detections in the field for 1FGL J1539.0-3328

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 15 39 51.70 -33 22 24.24 3.81 (2.0 ± 0.2) x 10-3 149 9.553 9.153
2 15 39 24.64 -33 28 38.31 3.89 (1.5 ± 0.2) x 10-3 142 7.804 7.797
3 15 38 54.09 -33 35 00.26 3.93 (9 ± 2) x 10-4 115 6.183 5.705
4 15 38 12.63 -33 22 56.65 4.05 (7.1 ± 1.4) x 10-4 67 5.431 5.228
5 15 39 48.85 -33 32 38.62 4.05 (8 ± 2) x 10-4 77 5.162 4.893
6 15 39 39.14 -33 25 29.67 3.94 (7 ± 2) x 10-4 86 4.912 4.784
7 15 38 47.83 -33 17 10.33 3.90 (6.0 ± 1.4) x 10-4 69 4.156 4.380
8 15 39 00.61 -33 27 02.59 4.11 (6.0 ± 1.4) x 10-4 103 4.065 4.285
9 15 39 38.01 -33 19 44.37 3.94 (5.0 ± 1.3) x 10-4 72 3.975 3.951
10 15 38 45.19 -33 21 43.98 3.98 (4.5 ± 1.2) x 10-4 68 3.496 3.665
11 15 39 24.40 -33 17 38.84 3.97 (4.4 ± 1.3) x 10-4 64 3.854 3.488
12 15 39 08.16 -33 30 35.77 4.07 (4.3 ± 1.2) x 10-4 94 3.206 3.455
13 15 38 23.07 -33 19 06.32 4.11 (3.8 ± 1.2) x 10-4 47 3.569 3.276
14 15 38 16.81 -33 27 33.01 4.13 (3.6 ± 1.1) x 10-4 47 3.571 3.167

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 15 38 54.09 -33 35 00.26 3.93 (4.3 ± 1.2) x 10-4 114 4.338 3.483
2 15 39 38.10 -33 24 13.68 3.97 (3.7 ± 1.3) x 10-4 93 3.078 2.904
3 15 39 55.83 -33 30 14.61 4.06 (3.6 ± 1.3) x 10-4 47 3.011 2.837
4 15 39 50.71 -33 30 08.38 3.94 (3.0 ± 1.1) x 10-4 77 3.328 2.683
5 15 39 55.19 -33 23 59.50 3.90 (3.2 ± 1.3) x 10-4 66 3.264 2.411
6 15 39 32.25 -33 17 11.37 3.97 (2.6 ± 1.1) x 10-4 68 3.399 2.408
7 15 38 39.34 -33 18 40.36 3.91 (2.8 ± 1.2) x 10-4 76 2.999 2.278
8 15 39 51.31 -33 28 56.33 3.93 (1.7 ± 1.1) x 10-4 70 3.101 1.583

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 1FGL J1539.0-3328 Swift-XRT image with known radio, optical and UV sources for 1FGL J1539.0-3328


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 J153911-332209 15 39 11.50 -33 22 09.12 6.20 NVSS
2 NVSS J153929-332201 15 39 29.21 -33 22 00.84 8.17 NVSS
3 NVSS J153822-332547 15 38 22.51 -33 25 48.00 8.78 NVSS
4 NVSS J153821-333137 15 38 21.79 -33 31 37.92 9.30 NVSS
SUMSS J153821-333135 15 38 21.70 -33 31 36.12 9.32 SUMSS
5 NVSS J153941-332225 15 39 41.30 -33 22 26.04 9.78 NVSS
SUMSS J153941-332215 15 39 41.30 -33 22 14.88 9.88 SUMSS
QORG J153949.2-333237 15 39 49.20 -33 32 36.96 10.62 QORGCAT
6 NVSS J153949-333240 15 39 49.20 -33 32 39.84 10.64 NVSS
7 NVSS J153809-333523 15 38 09.31 -33 35 22.92 13.36 NVSS
SUMSS J153809-333522 15 38 09.10 -33 35 21.84 13.39 SUMSS

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