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 51.71 -33 22 24.38 3.81 (2.0 ± 0.2) x 10-3 150 9.592 9.197
2 15 39 24.64 -33 28 38.32 3.89 (1.5 ± 0.2) x 10-3 143 7.862 7.835
3 15 38 54.10 -33 35 00.21 3.93 (9 ± 2) x 10-4 115 6.176 5.688
4 15 38 12.64 -33 22 56.63 4.05 (7.3 ± 1.4) x 10-4 67 5.418 5.288
5 15 39 48.80 -33 32 38.89 4.04 (8 ± 2) x 10-4 78 5.153 4.862
6 15 39 39.14 -33 25 29.31 3.94 (7 ± 2) x 10-4 87 4.896 4.775
7 15 38 47.71 -33 17 10.53 3.90 (6.0 ± 1.4) x 10-4 72 4.143 4.368
8 15 39 00.61 -33 27 02.59 4.11 (6.0 ± 1.4) x 10-4 103 4.051 4.258
9 15 39 37.99 -33 19 44.24 3.94 (5.0 ± 1.3) x 10-4 73 3.964 3.923
10 15 39 08.28 -33 30 36.58 4.06 (4.5 ± 1.3) x 10-4 96 3.487 3.560
11 15 38 45.38 -33 21 42.90 3.96 (4.6 ± 1.3) x 10-4 73 3.482 3.512
12 15 39 24.40 -33 17 38.84 3.97 (4.4 ± 1.3) x 10-4 64 3.843 3.488
13 15 38 23.08 -33 19 06.38 4.10 (4.1 ± 1.2) x 10-4 48 3.684 3.407
14 15 38 16.66 -33 27 30.14 4.08 (3.5 ± 1.1) x 10-4 48 3.562 3.127

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 54.10 -33 35 00.21 3.93 (4.3 ± 1.2) x 10-4 114 4.331 3.472
2 15 39 38.14 -33 24 13.90 3.97 (3.7 ± 1.3) x 10-4 93 3.060 2.895
3 15 39 55.10 -33 23 59.13 3.89 (3.5 ± 1.2) x 10-4 66 3.388 2.892
4 15 39 50.68 -33 30 08.94 3.94 (3.0 ± 1.1) x 10-4 75 3.179 2.683
5 15 39 32.22 -33 17 11.97 3.96 (2.5 ± 1.1) x 10-4 70 3.393 2.382
6 15 38 38.85 -33 18 43.19 3.92 (2.8 ± 1.2) x 10-4 75 2.837 2.270
7 15 39 51.28 -33 28 56.17 3.92 (1.7 ± 1.1) x 10-4 71 3.098 1.581

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
[PME2013] J1539-3322 15 39 11.59 -33 22 05.88 6.27 AT2FGLUS
[SPT2015] ATCA J1539-3322 15 39 11.59 -33 22 05.88 6.27 FER2FUSRID
2 TGSSADR J153933.2-332540 15 39 33.31 -33 25 41.16 6.75 GMRTAS150M
3 NVSS J153929-332201 15 39 29.21 -33 22 00.84 8.17 NVSS
4 PCCS2 030 G338.67+17.66 15 38 34.70 -33 22 06.96 8.42 PCCS030GHZ
5 NVSS J153822-332547 15 38 22.51 -33 25 48.00 8.78 NVSS
6 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
TGSSADR J153821.2-333131 15 38 21.29 -33 31 31.08 9.37 GMRTAS150M
GLEAM J153821-333135 15 38 21.29 -33 31 36.12 9.38 GLEAMEGCAT
GLEAM J153940-332216 15 39 40.39 -33 22 17.04 9.72 GLEAMEGCAT
7 NVSS J153941-332225 15 39 41.30 -33 22 26.04 9.78 NVSS
TGSSADR J153941.2-332222 15 39 41.21 -33 22 22.08 9.80 GMRTAS150M
SUMSS J153941-332215 15 39 41.30 -33 22 14.88 9.88 SUMSS
8 SPASS J153818-333312 15 38 18.50 -33 33 12.96 10.61 SPASS2P3GH
9 NVSS J153949-333240 15 39 49.20 -33 32 39.84 10.64 NVSS
TGSSADR J153810.5-333507 15 38 10.51 -33 35 07.08 13.01 GMRTAS150M
GLEAM J153809-333517 15 38 09.31 -33 35 17.16 13.31 GLEAMEGCAT
10 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
TGSSADR J153808.3-333535 15 38 08.30 -33 35 35.16 13.65 GMRTAS150M

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