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 J1738.5-2656

Field

Detected Excesses

Swift-XRT image of the field for 1FGL J1738.5-2656 Swift-XRT detections in the field for 1FGL J1738.5-2656

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 17 38 17.03 -26 59 39.52 3.51 $ 2.09 ± 0.02 $ 12790 123.800 105.400
2 17 38 12.37 -27 11 24.54 6.21 (2.2 ± 0.7) x 10-3 13 2.951 3.192

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 38 11.73 -27 06 22.31 4.60 (2.5 ± 1.0) x 10-3 28 3.376 2.475
2 17 38 15.27 -27 03 09.12 4.05 (2.0 ± 1.0) x 10-3 63 3.225 2.106
3 17 38 29.42 -27 00 32.41 3.99 (1.6 ± 0.9) x 10-3 72 2.912 1.846
4 17 38 17.03 -26 59 39.54 3.51 (3 ± 2) x 10-3 13093 4.907 1.779
5 17 38 25.27 -26 55 54.06 4.26 (1.6 ± 0.9) x 10-3 64 3.066 1.744
6 17 38 15.27 -27 03 09.13 4.05 (2.0 ± 1.2) x 10-3 64 2.941 1.696
7 17 38 21.28 -27 02 00.49 3.82 (2.2 ± 1.3) x 10-3 103 3.913 1.684
8 17 38 16.62 -26 57 53.39 3.64 (1.9 ± 1.2) x 10-3 288 2.781 1.631
9 17 38 28.18 -27 00 29.67 3.88 (2.0 ± 1.2) x 10-3 80 2.663 1.623
10 17 38 29.42 -27 00 32.41 3.99 (1.8 ± 1.1) x 10-3 72 2.663 1.609
11 17 38 06.16 -27 00 52.86 3.91 (1.4 ± 0.9) x 10-3 68 2.767 1.602
12 17 37 59.30 -26 59 43.93 4.23 (1.3 ± 0.9) x 10-3 39 2.859 1.484
13 17 38 16.14 -26 59 39.83 3.51 (1.7 ± 1.2) x 10-3 12227 3.991 1.481
14 17 38 12.23 -27 01 56.86 3.81 (1.6 ± 1.1) x 10-3 90 3.243 1.468
15 17 38 19.99 -27 00 50.50 3.53 (3 ± 2) x 10-3 453 2.640 1.429
16 17 38 06.02 -26 58 24.55 3.93 (1.4 ± 1.0) x 10-3 65 2.821 1.421
17 17 38 17.03 -26 59 39.51 3.51 (1.7 ± 1.3) x 10-3 12698 3.561 1.360
18 17 38 18.30 -26 59 16.52 3.51 (3 ± 2) x 10-3 12051 2.781 1.317
19 17 38 17.03 -26 59 39.54 3.51 (1.5 ± 1.2) x 10-3 13155 2.650 1.249
20 17 38 11.54 -27 02 03.59 3.86 (1.5 ± 1.2) x 10-3 90 4.784 1.224
21 17 38 06.16 -27 00 52.86 3.91 (1.2 ± 1.0) x 10-3 68 2.687 1.188
22 17 38 15.27 -27 03 09.12 4.05 (1.2 ± 1.0) x 10-3 63 3.029 1.179
23 17 38 18.73 -27 00 24.28 3.51 (1.4 ± 1.2) x 10-3 3048 3.371 1.165
24 17 38 16.64 -27 00 25.53 3.51 (2 ± 2) x 10-3 2650 3.921 1.117
25 17 38 17.03 -26 59 39.51 3.51 (1.3 ± 1.2) x 10-3 12467 4.226 1.070
26 17 38 06.08 -26 58 20.73 3.96 (1.0 ± 1.0) x 10-3 66 3.013 1.060
27 17 38 17.05 -26 59 34.71 3.51 (1.1 ± 1.1) x 10-3 13025 3.395 1.057
28 17 38 17.03 -26 59 39.54 3.51 (2 ± 2) x 10-3 13055 2.787 0.978
29 17 38 29.41 -27 00 34.92 4.00 (1.1 ± 1.1) x 10-3 77 2.834 0.974
30 17 38 21.29 -27 02 04.04 3.83 (2 ± 2) x 10-3 93 2.753 0.928
31 17 38 17.03 -26 59 39.51 3.51 (2 ± 2) x 10-3 12698 3.134 0.855
32 17 38 17.03 -26 59 39.54 3.51 (9 ± 11) x 10-4 13196 2.669 0.843
33 17 38 17.03 -26 59 39.52 3.51 (2 ± 3) x 10-3 12891 5.115 0.772
34 17 38 21.29 -26 59 40.41 3.51 (1 ± 2) x 10-3 1709 3.151 0.771
35 17 38 17.03 -26 59 39.54 3.51 (1 ± 2) x 10-3 13055 2.952 0.713
36 17 38 17.03 -26 59 39.51 3.51 (2 ± 2) x 10-3 12698 4.903 0.686
37 17 38 17.03 -26 59 39.51 3.51 (7 ± 11) x 10-4 12467 3.262 0.631
38 17 38 17.03 -26 59 39.51 3.51 (7 ± 11) x 10-4 12583 3.689 0.608
39 17 38 12.96 -26 59 58.52 3.51 (6 ± 10) x 10-4 1271 2.691 0.605
40 17 38 12.23 -26 56 23.25 4.14 (4 ± 9) x 10-4 48 2.696 0.484
41 17 38 17.03 -26 59 39.52 3.51 (9 ± 20) x 10-4 12891 5.492 0.457
42 17 38 17.03 -26 59 39.51 3.51 (8 ± 18) x 10-4 12467 3.262 0.453
43 17 38 17.03 -26 59 39.51 3.51 (9 ± 21) x 10-4 12790 5.473 0.449
44 17 38 17.03 -26 59 39.52 3.51 (1 ± 17) x 10-4 12930 3.923 0.087
45 17 38 12.45 -27 01 53.28 3.78 (3 ± 81) x 10-5 98 3.466 0.036
46 17 38 17.03 -26 59 39.51 3.51 N/A 12467 5.969 N/A
47 17 38 17.03 -26 59 39.51 3.51 N/A 12698 3.422 N/A
48 17 38 17.03 -26 59 39.52 3.51 N/A 12891 7.848 N/A
49 17 38 17.03 -26 59 39.52 3.51 N/A 12891 3.151 N/A
50 17 38 17.03 -26 59 39.51 3.51 N/A 12698 4.781 N/A
51 17 38 17.03 -26 59 39.51 3.51 N/A 12467 5.801 N/A
52 17 38 17.03 -26 59 39.51 3.51 N/A 12583 4.260 N/A
53 17 38 17.03 -26 59 39.51 3.51 N/A 12583 5.898 N/A
54 17 38 17.03 -26 59 39.52 3.51 N/A 12891 9.050 N/A
55 17 38 17.03 -26 59 39.51 3.51 N/A 12698 7.572 N/A
56 17 38 17.03 -26 59 39.51 3.51 N/A 13055 6.488 N/A
57 17 38 17.03 -26 59 39.51 3.51 N/A 12698 10.880 N/A
58 17 38 17.03 -26 59 39.51 3.51 N/A 12467 3.767 N/A
59 17 38 17.03 -26 59 39.52 3.51 N/A 12698 8.404 N/A

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 1FGL J1738.5-2656 Swift-XRT image with known radio, optical and UV sources for 1FGL J1738.5-2656

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
IRAS 17345-265 17 38 16.51 -26 59 21.48 5.31 EINSTEIN
SLX 1735-269 17 38 17.11 -26 59 38.76 5.38
1 1BMW 173816.8-265935 17 38 16.82 -26 59 35.16 5.40 ROSAT
1RXH J173816.8-265934 17 38 16.75 -26 59 34.44 5.40 ROSAT
1RXS J173817.0-265940 17 38 16.99 -26 59 39.84 5.42 ROSAT
1RXS J173817.0-265940 17 38 16.99 -26 59 39.84 5.42 ROSAT
1WGA J1738.2-2659 17 38 16.70 -26 59 47.76 5.55 ROSAT
2RXP J173816.8-265952 17 38 16.75 -26 59 52.08 5.59 ROSAT
AXS_J173815-2659 17 38 15.50 -26 59 43.08 5.71 ASCA
2 SAXWFC J1738.2-2659.5 17 38 13.20 -26 59 27.60 5.98 BEPPOSAX
3 1BMW 173814.6-270059 17 38 14.59 -27 00 58.68 6.70 ROSAT
4 SLX 1735-269 17 38 06.00 -26 56 60.00 6.94 MGGAMMACAT
5 1RXS J173908.4-270245 17 39 08.40 -27 02 45.60 9.79 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NSV 23115 17 38 48.79 -26 58 04.08 3.46 GCVSNSVARS
2 NSV 23044 17 38 09.00 -26 57 10.08 6.03 GCVSNSVARS
3 NSV 23047 17 38 10.61 -26 58 28.92 6.04 GCVSNSVARS
4 HD 316047 17 38 25.32 -27 02 00.96 6.25 HDEC
NSV 23063 17 38 25.01 -27 02 08.16 6.39 GCVSNSVARS
5 SAO 185589 17 39 05.88 -26 56 14.64 6.72 SAO
HIP 86385 17 39 05.98 -26 56 14.64 6.74 HIPPARCOS
CD-2612213 17 39 05.98 -26 56 15.00 6.74 ACRS
PPM 267115 17 39 05.98 -26 56 15.36 6.75 PPM
HD 160089 17 39 05.98 -26 56 15.00 6.75 HIC
6 NSV 23037 17 38 05.71 -26 57 56.88 6.91 GCVSNSVARS
7 MGPS J173811-265043 17 38 11.59 -26 50 43.08 7.68 MGPS2
8 NVSS J173834-264800 17 38 34.10 -26 48 01.08 8.21 NVSS
MGPS J173833-264756 17 38 33.79 -26 47 57.12 8.28 MGPS2
MGPS J173806-265049 17 38 06.00 -26 50 49.92 8.53 MGPS2
9 NVSS J173805-265052 17 38 05.81 -26 50 53.16 8.54 NVSS
10 NVSS J173757-270104 17 37 57.91 -27 01 05.16 9.73 NVSS
11 NSV 23132 17 38 58.51 -26 47 51.00 9.78 GCVSNSVARS
MGPS J173757-270119 17 37 57.70 -27 01 18.84 9.89 MGPS2
12 NSV 23186 17 39 20.90 -26 54 56.16 10.15 GCVSNSVARS
13 NSV 23174 17 39 14.40 -26 50 35.88 10.29 GCVSNSVARS
TXS 1736-268 17 39 21.79 -26 55 36.12 10.30 TEXAS
MGPS J173921-265531 17 39 21.91 -26 55 31.08 10.31 MGPS2
14 NVSS J173922-265533 17 39 22.10 -26 55 33.96 10.37 NVSS
15 NSV 23019 17 37 54.19 -26 50 53.16 10.68 GCVSNSVARS
16 PSR J1738-2647 17 38 04.99 -26 47 45.96 10.87 ATNFPULSAR
PSR J1738-2647 17 38 04.99 -26 47 42.00 10.92 PMPULSAR
17 NSV 23148 17 39 03.79 -26 47 12.12 10.97 GCVSNSVARS
18 NVSS J173850-264536 17 38 50.30 -26 45 37.08 11.08 NVSS
19 V543 OPH 17 39 15.22 -27 03 28.44 11.41 WOODEBCAT
20 NSV 23011 17 37 45.19 -26 58 45.84 11.54 GCVSNSVARS
21 NSV 23007 17 37 43.39 -26 57 59.04 11.79 GCVSNSVARS
22 NSV 23033 17 38 02.81 -26 46 49.08 11.92 GCVSNSVARS
23 V2672 Oph 17 38 19.70 -26 44 13.92 12.50 GCVS
24 NSV 23040 17 38 06.31 -27 06 54.00 12.54 GCVSNSVARS
25 NVSS J173743-265010 17 37 43.10 -26 50 11.04 13.19 NVSS
MGPS J173743-265005 17 37 43.20 -26 50 04.92 13.22 MGPS2
26 NSV 23193 17 39 26.11 -27 03 29.88 13.39 GCVSNSVARS

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