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 51.69 -33 22 23.82 3.88 (2.1 ± 0.2) x 10-3 120 8.601 8.588
2 15 39 24.62 -33 28 34.32 3.96 (1.4 ± 0.2) x 10-3 108 6.665 6.612
3 15 38 53.89 -33 35 00.34 3.98 (10 ± 2) x 10-4 99 5.896 5.404
4 15 38 12.47 -33 22 56.23 4.15 (7 ± 2) x 10-4 56 4.943 4.747
5 15 39 39.01 -33 25 29.60 4.04 (8 ± 2) x 10-4 74 4.615 4.652
6 15 39 48.94 -33 32 38.10 4.14 (8 ± 2) x 10-4 65 4.629 4.438
7 15 39 00.70 -33 27 02.68 4.15 (6 ± 2) x 10-4 97 3.832 3.970
8 15 39 37.85 -33 19 43.96 4.05 (5.5 ± 1.4) x 10-4 57 3.609 3.821
9 15 39 24.31 -33 17 39.35 4.00 (4.6 ± 1.4) x 10-4 54 3.051 3.206
10 15 39 38.27 -33 24 12.37 4.02 (5 ± 2) x 10-4 87 3.227 3.116
11 15 38 44.92 -33 21 41.13 4.07 (4.5 ± 1.4) x 10-4 64 3.056 3.098
12 15 38 48.06 -33 17 02.76 4.00 (4.3 ± 1.4) x 10-4 48 3.273 3.072
13 15 38 22.80 -33 19 05.17 4.23 (3.9 ± 1.3) x 10-4 40 2.951 3.048

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 16.81 -33 27 28.70 4.19 (3.5 ± 1.2) x 10-4 39 3.172 2.847
2 15 39 55.81 -33 30 14.55 4.11 (3.7 ± 1.4) x 10-4 43 2.897 2.639
3 15 39 32.64 -33 30 07.43 4.14 (2.8 ± 1.2) x 10-4 55 3.030 2.351
4 15 39 54.78 -33 23 49.32 4.01 (3.1 ± 1.4) x 10-4 57 2.965 2.174
5 15 38 38.75 -33 18 38.77 3.99 (2.7 ± 1.3) x 10-4 62 2.809 2.019

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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