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 J1539.2-3324

Field

Detected Excesses
Swift-XRT image of the field for 3FGL J1539.2-3324 Swift-XRT detections in the field for 3FGL J1539.2-3324

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 15 39 51.77 -33 22 26.08 3.75 (2.1 ± 0.2) x 10-3 216 10.840 10.390
2 15 39 24.62 -33 28 36.23 3.83 (1.5 ± 0.2) x 10-3 177 8.711 8.748
3 15 39 48.83 -33 32 40.58 3.94 (9 ± 2) x 10-4 100 6.415 5.990
4 15 38 12.93 -33 22 56.64 3.99 (6.3 ± 1.2) x 10-4 67 5.688 5.240
5 15 38 54.17 -33 34 59.22 3.92 (6.5 ± 1.3) x 10-4 102 6.077 5.197
6 15 39 39.37 -33 25 31.73 3.87 (7.1 ± 1.4) x 10-4 131 5.326 5.092
7 15 38 47.80 -33 17 12.57 3.84 (5.6 ± 1.2) x 10-4 91 4.419 4.690
8 15 39 01.16 -33 27 10.90 3.99 (5.5 ± 1.2) x 10-4 89 4.268 4.674
9 15 39 09.28 -33 30 20.97 4.00 (5.0 ± 1.1) x 10-4 80 4.158 4.416
10 15 39 37.83 -33 19 42.29 3.85 (5.2 ± 1.2) x 10-4 120 4.289 4.339
11 15 38 44.73 -33 21 32.18 3.91 (4.3 ± 1.2) x 10-4 84 3.577 3.698
12 15 39 50.68 -33 30 11.57 3.88 (4.1 ± 1.1) x 10-4 92 3.659 3.671
13 15 39 24.79 -33 17 36.72 3.89 (3.9 ± 1.1) x 10-4 93 3.800 3.450
14 15 40 00.21 -33 26 16.47 3.89 (3.8 ± 1.1) x 10-4 80 4.064 3.324
15 15 39 38.08 -33 24 11.40 3.88 (4.0 ± 1.2) x 10-4 130 3.003 3.319
16 15 38 17.00 -33 27 30.64 4.05 (3.2 ± 1.0) x 10-4 47 3.654 3.260
17 15 38 22.90 -33 19 08.68 4.01 (3.2 ± 1.0) x 10-4 52 3.546 3.189
18 15 39 56.00 -33 30 16.67 3.98 (3.5 ± 1.1) x 10-4 62 3.361 3.125
19 15 39 54.34 -33 23 56.28 3.83 (3.3 ± 1.1) x 10-4 107 3.229 3.075

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 38.13 -33 29 19.16 3.94 (2.6 ± 1.0) x 10-4 69 3.033 2.776
2 15 39 32.05 -33 17 15.02 3.88 (2.6 ± 1.0) x 10-4 103 3.100 2.616
3 15 39 43.23 -33 31 11.26 3.91 (2.2 ± 0.9) x 10-4 87 2.960 2.417
4 15 39 38.46 -33 21 21.19 3.86 (2.3 ± 1.0) x 10-4 112 3.037 2.362

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 3FGL J1539.2-3324 Swift-XRT image with known radio, optical and UV sources for 3FGL J1539.2-3324


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 2.98 NVSS
[PME2013] J1539-3322 15 39 11.59 -33 22 05.88 3.03 AT2FGLUS
[SPT2015] ATCA J1539-3322 15 39 11.59 -33 22 05.88 3.03 FER2FUSRID
2 TGSSADR J153933.2-332540 15 39 33.31 -33 25 41.16 3.37 GMRTAS150M
3 NVSS J153929-332201 15 39 29.21 -33 22 00.84 3.72 NVSS
GLEAM J153940-332216 15 39 40.39 -33 22 17.04 5.41 GLEAMEGCAT
4 NVSS J153941-332225 15 39 41.30 -33 22 26.04 5.50 NVSS
TGSSADR J153941.2-332222 15 39 41.21 -33 22 22.08 5.51 GMRTAS150M
SUMSS J153941-332215 15 39 41.30 -33 22 14.88 5.58 SUMSS
5 PCCS2 030 G338.67+17.66 15 38 34.70 -33 22 06.96 9.36 PCCS030GHZ
6 NVSS J153916-331504 15 39 16.39 -33 15 03.96 9.78 NVSS
7 NVSS J153949-333240 15 39 49.20 -33 32 39.84 10.22 NVSS
8 NVSS J153822-332547 15 38 22.51 -33 25 48.00 11.54 NVSS
9 NVSS J153821-333137 15 38 21.79 -33 31 37.92 13.47 NVSS
SUMSS J153821-333135 15 38 21.70 -33 31 36.12 13.48 SUMSS
TGSSADR J153821.2-333131 15 38 21.29 -33 31 31.08 13.51 GMRTAS150M
GLEAM J153821-333135 15 38 21.29 -33 31 36.12 13.54 GLEAMEGCAT

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