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.

4FGL J1746.1-2541

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1746.1-2541 Swift-XRT detections in the field for 4FGL J1746.1-2541

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 17 45 30.24 -25 55 31.66 5.11 (5.6 ± 1.2) x 10-3 28 4.594 4.743
2 17 46 46.28 -25 52 14.43 4.30 (6 ± 2) x 10-3 39 4.377 4.336
3 17 47 01.06 -25 53 38.29 4.45 (3.9 ± 1.2) x 10-3 36 3.972 3.249
4 17 45 58.92 -25 59 35.06 4.08 (3.9 ± 1.2) x 10-3 41 3.574 3.151
5 17 45 51.76 -25 58 16.84 4.25 (3.8 ± 1.2) x 10-3 29 3.383 3.121

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 17 46 35.23 -25 51 43.93 4.20 (3.7 ± 1.2) x 10-3 42 3.552 2.975
2 17 46 30.41 -25 59 39.34 3.88 (5 ± 2) x 10-3 65 3.184 2.940
3 17 46 40.93 -25 51 33.00 4.29 (3.2 ± 1.1) x 10-3 44 2.957 2.936
4 17 46 04.61 -25 48 17.53 4.57 (2.9 ± 1.0) x 10-3 39 2.715 2.825
5 17 46 31.08 -25 59 34.48 3.88 (4 ± 2) x 10-3 63 4.996 2.741
6 17 46 20.86 -25 52 40.65 4.55 (2.9 ± 1.0) x 10-3 33 2.797 2.736
7 17 46 43.87 -25 56 05.54 4.00 (3.5 ± 1.3) x 10-3 47 3.474 2.688
8 17 45 16.88 -25 50 40.34 4.81 (2.4 ± 0.9) x 10-3 25 3.189 2.658
9 17 46 37.13 -25 56 20.89 4.07 (3.0 ± 1.2) x 10-3 34 3.055 2.567
10 17 46 26.55 -25 57 24.19 3.97 (3.1 ± 1.2) x 10-3 52 3.162 2.555
11 17 46 26.64 -26 00 12.31 3.94 (3.6 ± 1.4) x 10-3 48 3.943 2.498
12 17 46 38.62 -26 00 20.68 4.06 (5 ± 2) x 10-3 39 3.861 2.490
13 17 46 32.22 -25 56 42.54 4.07 (2.8 ± 1.1) x 10-3 50 3.524 2.476
14 17 46 38.05 -25 58 50.24 3.99 (3.5 ± 1.4) x 10-3 38 3.217 2.465
15 17 45 57.65 -25 57 04.60 4.28 (2.5 ± 1.0) x 10-3 39 2.868 2.419
16 17 46 22.45 -25 54 55.31 4.17 (2.9 ± 1.2) x 10-3 41 3.130 2.413
17 17 46 40.70 -25 58 29.49 4.04 (2.8 ± 1.2) x 10-3 38 3.009 2.398
18 17 46 13.52 -25 59 27.08 4.04 (2.7 ± 1.2) x 10-3 46 3.302 2.315
19 17 46 26.85 -25 57 08.32 3.96 (3.1 ± 1.4) x 10-3 66 3.007 2.246
20 17 46 04.86 -25 42 13.95 4.31 (2.5 ± 1.1) x 10-3 58 2.779 2.229
21 17 46 45.76 -25 56 00.67 4.03 (2.4 ± 1.1) x 10-3 51 3.521 2.211
22 17 46 40.69 -25 56 12.93 4.04 (3 ± 2) x 10-3 43 2.911 2.146
23 17 46 45.69 -25 58 22.73 3.97 (2.7 ± 1.3) x 10-3 58 4.101 2.143
24 17 46 35.32 -25 51 43.59 4.20 (2.2 ± 1.0) x 10-3 44 3.417 2.138
25 17 46 23.01 -25 57 56.43 4.03 (2.6 ± 1.2) x 10-3 39 3.322 2.128
26 17 46 48.40 -25 58 12.82 3.99 (3.0 ± 1.4) x 10-3 48 3.545 2.101
27 17 46 47.33 -25 55 59.10 4.04 (2.5 ± 1.2) x 10-3 55 4.127 2.021
28 17 45 58.45 -25 44 57.09 4.35 (2.0 ± 1.1) x 10-3 54 3.025 1.943
29 17 46 06.04 -25 58 10.95 4.14 (1.9 ± 1.0) x 10-3 40 2.935 1.897
30 17 46 10.65 -26 00 21.98 4.08 (2.3 ± 1.2) x 10-3 43 2.854 1.883
31 17 46 34.66 -25 59 07.63 3.91 (2.2 ± 1.2) x 10-3 59 4.704 1.797
32 17 46 45.62 -25 58 23.70 3.98 (2.0 ± 1.1) x 10-3 57 3.870 1.728
33 17 46 13.55 -25 59 26.83 4.04 (1.8 ± 1.1) x 10-3 46 3.690 1.642
34 17 45 59.37 -26 00 25.21 4.25 (1.7 ± 1.1) x 10-3 28 2.761 1.631

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1746.1-2541 Swift-XRT image with known radio, optical and UV sources for 4FGL J1746.1-2541

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 CXOGSG J174601.8-253922 17 46 01.85 -25 39 23.04 2.90 CHANDRA
2CXO J174601.8-253922 17 46 01.85 -25 39 22.68 2.90 CHANDRA
X174601.81-253922.5 17 46 01.80 -25 39 22.68 2.91 CHANDRA
CXOGBS J174601.8-253922 17 46 01.80 -25 39 22.68 2.91 CHANDRA
2 X174623.93-253922.8 17 46 23.93 -25 39 22.68 3.38 CHANDRA
CXOGSG J174623.9-253922 17 46 23.93 -25 39 22.68 3.38 CHANDRA
3 2CXO J174608.1-253735 17 46 08.16 -25 37 35.76 3.77 CHANDRA
4 X174627.05-254307.3 17 46 27.05 -25 43 07.32 3.95 CHANDRA
2CXO J174627.1-254306 17 46 27.12 -25 43 06.96 3.96 CHANDRA
CXOGSG J174627.0-254307 17 46 27.10 -25 43 07.68 3.96 CHANDRA
CXOGBS J174627.1-254306 17 46 27.12 -25 43 06.60 3.96 CHANDRA
5 CXOGBS J174621.4-254448 17 46 21.41 -25 44 48.84 4.17 CHANDRA
6 CXOGBS J174555.3-254429 17 45 55.39 -25 44 29.40 4.85 CHANDRA
X174555.28-254430.1 17 45 55.27 -25 44 30.12 4.87 CHANDRA
7 X174552.19-254414.7 17 45 52.20 -25 44 14.64 5.27 CHANDRA
8 X174638.24-254115.9 17 46 38.23 -25 41 16.08 6.02 CHANDRA
2CXO J174638.2-254114 17 46 38.26 -25 41 14.64 6.02 CHANDRA
9 X174557.17-254633.0 17 45 57.17 -25 46 32.88 6.18 CHANDRA
10 X174543.21-254234.4 17 45 43.20 -25 42 34.56 6.51 CHANDRA
11 CXOGBS J174619.0-254750 17 46 19.08 -25 47 49.92 6.77 CHANDRA
12 CXOGSG J174613.4-253426 17 46 13.46 -25 34 26.76 6.85 CHANDRA
X174613.49-253426.6 17 46 13.49 -25 34 26.76 6.86 CHANDRA
2CXO J174613.4-253426 17 46 13.46 -25 34 26.04 6.86 CHANDRA
13 X174639.11-254429.9 17 46 39.12 -25 44 29.76 6.99 CHANDRA
2CXO J174639.1-254429 17 46 39.14 -25 44 29.76 7.00 CHANDRA
14 CXOGSG J174556.5-254802 17 45 56.54 -25 48 02.52 7.55 CHANDRA
15 X174625.77-253415.8 17 46 25.78 -25 34 15.96 7.72 CHANDRA
CXOGBS J174625.9-253413 17 46 25.94 -25 34 13.80 7.76 CHANDRA
2CXO J174626.0-253414 17 46 26.04 -25 34 14.16 7.77 CHANDRA
16 X174611.54-254909.1 17 46 11.54 -25 49 09.12 7.87 CHANDRA
CXOGBS J174611.5-254909 17 46 11.54 -25 49 09.12 7.87 CHANDRA
2CXO J174611.5-254909 17 46 11.52 -25 49 09.12 7.87 CHANDRA
17 2CXO J174623.1-254930 17 46 23.14 -25 49 30.72 8.63 CHANDRA
X174623.14-254930.9 17 46 23.14 -25 49 31.08 8.63 CHANDRA
CXOGBS J174623.1-254930 17 46 23.14 -25 49 31.08 8.63 CHANDRA
CXOGSG J174623.1-254930 17 46 23.14 -25 49 31.08 8.63 CHANDRA
18 CXOGBS J174627.1-254952 17 46 27.14 -25 49 51.96 9.27 CHANDRA
X174627.15-254952.1 17 46 27.14 -25 49 51.96 9.27 CHANDRA
2CXO J174627.1-254952 17 46 27.17 -25 49 52.32 9.28 CHANDRA
CXOGSG J174627.1-254952 17 46 27.17 -25 49 52.32 9.28 CHANDRA
19 2CXO J174654.8-254443 17 46 54.86 -25 44 43.08 10.34 CHANDRA
CXOGSG J174654.8-254442 17 46 54.89 -25 44 42.72 10.34 CHANDRA
CXOGBS J174654.8-254442 17 46 54.89 -25 44 42.72 10.35 CHANDRA
X174654.88-254442.8 17 46 54.89 -25 44 42.72 10.35 CHANDRA
20 CXOGBS J174651.3-254646 17 46 51.34 -25 46 46.20 10.50 CHANDRA
X174651.33-254646.1 17 46 51.34 -25 46 46.20 10.50 CHANDRA
CXOGSG J174651.3-254646 17 46 51.36 -25 46 46.56 10.52 CHANDRA
X174651.38-254646.7 17 46 51.38 -25 46 46.56 10.52 CHANDRA
2CXO J174651.4-254646 17 46 51.43 -25 46 46.56 10.53 CHANDRA
21 CXOGSG J174628.0-255114 17 46 28.03 -25 51 14.76 10.63 CHANDRA
X174628.03-255114.8 17 46 28.03 -25 51 14.76 10.63 CHANDRA
CXOGBS J174628.0-255114 17 46 28.03 -25 51 14.76 10.63 CHANDRA
22 2CXO J174644.6-254855 17 46 44.69 -25 48 55.44 10.68 CHANDRA
X174644.72-254855.0 17 46 44.71 -25 48 55.08 10.68 CHANDRA
23 X174624.79-255133.3 17 46 24.79 -25 51 33.48 10.69 CHANDRA
CXOGSG J174624.7-255133 17 46 24.79 -25 51 33.48 10.70 CHANDRA
2CXO J174624.7-255133 17 46 24.79 -25 51 33.84 10.70 CHANDRA
24 X174522.62-254202.6 17 45 22.63 -25 42 02.52 11.05 CHANDRA
25 CXOGSG J174623.9-255227 17 46 23.93 -25 52 27.84 11.52 CHANDRA
26 X174541.37-253127.4 17 45 41.38 -25 31 27.48 11.95 CHANDRA
CXOGBS J174541.3-253127 17 45 41.38 -25 31 27.48 11.95 CHANDRA
CXOGSG J174541.3-253127 17 45 41.35 -25 31 27.12 11.96 CHANDRA
27 2CXO J174524.7-254724 17 45 24.79 -25 47 24.72 12.18 CHANDRA
X174524.79-254724.9 17 45 24.79 -25 47 25.08 12.18 CHANDRA
CXOGBS J174524.7-254724 17 45 24.79 -25 47 25.08 12.18 CHANDRA
28 CXOGSG J174659.1-254713 17 46 59.14 -25 47 13.56 12.25 CHANDRA
X174659.14-254713.9 17 46 59.14 -25 47 13.92 12.26 CHANDRA
2CXO J174659.1-254714 17 46 59.14 -25 47 14.28 12.26 CHANDRA
CXOGBS J174659.1-254714 17 46 59.16 -25 47 14.28 12.26 CHANDRA
29 2CXO J174553.2-255310 17 45 53.28 -25 53 09.96 12.57 CHANDRA
30 2CXO J174550.9-252926 17 45 50.98 -25 29 26.88 12.71 CHANDRA
31 2CXO J174520.9-254805 17 45 21.00 -25 48 05.04 13.26 CHANDRA
CXOGBS J174520.9-254804 17 45 20.98 -25 48 04.68 13.26 CHANDRA
X174520.98-254804.8 17 45 20.98 -25 48 04.68 13.26 CHANDRA
CXOGSG J174520.9-254805 17 45 20.98 -25 48 05.04 13.26 CHANDRA
32 X174646.18-255215.6 17 46 46.18 -25 52 15.60 13.46 CHANDRA
CXOGSG J174646.1-255216 17 46 46.20 -25 52 15.96 13.47 CHANDRA
X174646.20-255216.2 17 46 46.20 -25 52 16.32 13.47 CHANDRA
2CXO J174646.2-255216 17 46 46.22 -25 52 16.32 13.48 CHANDRA
X174646.17-255217.4 17 46 46.18 -25 52 17.40 13.49 CHANDRA
CXOGBS J174646.1-255217 17 46 46.18 -25 52 17.40 13.49 CHANDRA
33 CXOGBS J174702.8-254918 17 47 02.81 -25 49 18.84 14.06 CHANDRA
X174702.80-254918.8 17 47 02.81 -25 49 18.84 14.06 CHANDRA
34 2CXO J174522.1-255048 17 45 22.15 -25 50 48.12 14.64 CHANDRA
CXOGBS J174522.1-255048 17 45 22.15 -25 50 48.12 14.64 CHANDRA
X174522.15-255048.2 17 45 22.15 -25 50 48.12 14.64 CHANDRA
CXOGSG J174522.1-255048 17 45 22.15 -25 50 48.12 14.64 CHANDRA
35 CXOGSG J174701.8-255233 17 47 01.85 -25 52 33.24 15.98 CHANDRA
2CXO J174701.9-255233 17 47 01.92 -25 52 33.24 15.99 CHANDRA
X174701.90-255233.5 17 47 01.90 -25 52 33.60 15.99 CHANDRA
CXOGBS J174701.9-255233 17 47 01.90 -25 52 33.60 15.99 CHANDRA

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NSV 23773 17 46 00.91 -25 40 22.08 2.57 GCVSNSVARS
NSV 23772 17 46 00.79 -25 40 22.08 2.59 GCVSNSVARS
2 865- 15 17 46 07.63 -25 37 25.32 3.96 NLTT
3 NSV 23777 17 46 06.70 -25 45 54.00 4.74 GCVSNSVARS
TGSSADR J174633.4-254205 17 46 33.41 -25 42 05.04 4.99 GMRTAS150M
[WBH2005] G2.872+1.505 17 46 33.50 -25 42 02.88 5.00 WBHGP20CM
4 NVSS J174633-254201 17 46 33.79 -25 42 02.16 5.07 NVSS
5 NSV 23741 17 45 41.11 -25 42 28.08 6.96 GCVSNSVARS
6 NSV 23784 17 46 15.50 -25 48 20.88 7.12 GCVSNSVARS
7 NVSS J174539-254001 17 45 39.91 -25 40 00.84 7.24 NVSS
[WBH2005] G2.797+1.695 17 45 39.79 -25 39 59.04 7.26 WBHGP20CM
8 NSV 23770 17 45 58.39 -25 48 02.16 7.37 GCVSNSVARS
9 ESO 174235-2536.7 17 45 41.76 -25 37 58.80 7.48 ESOUPPSALA
[WBH2005] G2.716+1.594 17 45 51.41 -25 47 16.08 7.52 WBHGP20CM
TGSSADR J174551.3-254718 17 45 51.31 -25 47 18.96 7.55 GMRTAS150M
10 NVSS J174551-254718 17 45 51.10 -25 47 17.88 7.57 NVSS
H 2-20 17 45 41.35 -25 37 51.24 7.62 PLNEBULAE
11 NSV 23811 17 46 38.81 -25 46 08.04 7.82 GCVSNSVARS
[WBH2005] G2.913+1.471 17 46 46.70 -25 40 59.88 7.94 WBHGP20CM
12 NVSS J174646-254100 17 46 46.80 -25 41 00.96 7.94 NVSS
TGSSADR J174646.7-254054 17 46 46.80 -25 40 54.84 7.94 GMRTAS150M
13 HIP 87009 17 46 43.06 -25 45 17.64 8.15 HIPPARCOS
CD-2512279 17 46 43.08 -25 45 17.64 8.16 ACRS
PPM 267278 17 46 43.08 -25 45 17.64 8.16 PPM
HD 161452 17 46 43.10 -25 45 17.64 8.16 HIC
SAO 185734 17 46 43.13 -25 45 17.64 8.17 SAO
14 NSV 23730 17 45 34.01 -25 40 09.12 8.54 GCVSNSVARS
TGSSADR J174648.6-253850 17 46 48.70 -25 38 49.92 8.72 GMRTAS150M
15 NVSS J174648-253848 17 46 48.89 -25 38 48.12 8.78 NVSS
16 PPM 733469 17 46 01.39 -25 32 30.12 9.08 PPM
17 NSV 23831 17 46 49.99 -25 45 47.16 9.76 GCVSNSVARS
18 NSV 23722 17 45 27.79 -25 40 44.04 9.87 GCVSNSVARS
19 NVSS J174528-253815 17 45 28.30 -25 38 16.08 10.20 NVSS
Te 1567 17 45 28.37 -25 38 13.56 10.20 PLNEBULAE
20 NVSS J174657-254047 17 46 57.91 -25 40 46.92 10.46 NVSS
21 SAO 185741 17 46 51.43 -25 46 43.32 10.50 SAO
CD-2512283 17 46 51.43 -25 46 45.48 10.52 ACRS
PPM 267284 17 46 51.43 -25 46 45.84 10.52 PPM
22 NVSS J174648-254760 17 46 48.31 -25 48 00.00 10.67 NVSS
23 NSV 23735 17 45 36.10 -25 48 23.04 10.68 GCVSNSVARS
24 NSV 23740 17 45 39.79 -25 32 35.88 11.25 GCVSNSVARS
25 NSV 23739 17 45 39.79 -25 31 55.92 11.78 GCVSNSVARS
26 NSV 23836 17 46 52.70 -25 49 30.00 12.38 GCVSNSVARS
27 NVSS J174651-253226 17 46 51.10 -25 32 26.16 12.57 NVSS
[WBH2005] G3.044+1.531 17 46 51.10 -25 32 24.00 12.58 WBHGP20CM
TGSSADR J174651.3-253226 17 46 51.31 -25 32 26.88 12.59 GMRTAS150M
28 [WBH2005] G3.051+1.608 17 46 34.70 -25 29 38.04 12.77 WBHGP20CM
29 PPM 733477 17 46 39.89 -25 52 35.76 12.99 PPM
30 NVSS J174655-253236 17 46 55.70 -25 32 35.88 13.21 NVSS
TGSSADR J174655.7-253235 17 46 55.70 -25 32 35.88 13.22 GMRTAS150M
[WBH2005] G3.050+1.515 17 46 55.70 -25 32 35.88 13.22 WBHGP20CM

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