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 17.04 -26 59 39.49 3.51 $ 2.09 ± 0.02 $ 12829 124.000 105.500
2 17 38 12.41 -27 11 24.54 6.21 (2.2 ± 0.7) x 10-3 13 3.111 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 11.74 -27 06 22.31 4.60 (2.5 ± 1.0) x 10-3 28 3.373 2.475
2 17 38 15.29 -27 03 08.85 4.05 (2.0 ± 1.0) x 10-3 65 3.221 2.106
3 17 38 17.04 -26 59 39.48 3.51 (2.9 ± 1.4) x 10-3 12733 3.746 2.022
4 17 38 15.60 -27 02 55.49 3.98 (2.3 ± 1.2) x 10-3 71 3.094 1.935
5 17 38 29.44 -27 00 32.62 3.99 (1.6 ± 0.9) x 10-3 72 2.908 1.846
6 17 38 25.28 -26 55 53.97 4.26 (1.6 ± 0.9) x 10-3 64 3.062 1.744
7 17 38 21.31 -27 02 00.19 3.82 (2.2 ± 1.3) x 10-3 103 3.909 1.665
8 17 38 16.56 -26 58 01.04 3.61 (1.9 ± 1.1) x 10-3 327 2.777 1.625
9 17 38 29.36 -27 01 02.42 3.98 (2.0 ± 1.2) x 10-3 72 2.659 1.623
10 17 38 12.14 -27 01 55.60 3.80 (1.7 ± 1.1) x 10-3 92 3.661 1.554
11 17 38 29.44 -27 00 32.62 3.99 (1.9 ± 1.2) x 10-3 73 2.830 1.527
12 17 37 58.99 -26 59 46.13 4.27 (1.3 ± 0.9) x 10-3 33 2.856 1.473
13 17 38 05.03 -26 58 43.41 3.93 (1.4 ± 1.0) x 10-3 57 2.818 1.413
14 17 38 06.06 -27 00 52.65 3.90 (1.3 ± 0.9) x 10-3 65 2.764 1.411
15 17 38 17.04 -26 59 39.48 3.51 (1.6 ± 1.2) x 10-3 12495 3.544 1.289
16 17 38 16.14 -26 58 10.06 3.59 (1.3 ± 1.1) x 10-3 348 2.865 1.180
17 17 38 17.04 -26 59 39.48 3.51 (2 ± 2) x 10-3 12733 3.132 1.177
18 17 38 13.36 -27 01 31.50 3.69 (1.4 ± 1.2) x 10-3 139 4.781 1.171
19 17 38 12.14 -27 01 53.26 3.79 (1.2 ± 1.1) x 10-3 94 3.600 1.171
20 17 38 18.61 -27 00 22.16 3.51 (1.4 ± 1.2) x 10-3 4079 3.367 1.165
21 17 38 16.19 -26 59 39.83 3.51 (2 ± 2) x 10-3 12252 3.259 1.163
22 17 38 06.06 -27 00 52.65 3.90 (1.1 ± 1.0) x 10-3 65 2.684 1.151
23 17 38 16.66 -27 00 24.51 3.51 (2 ± 2) x 10-3 2640 3.918 1.113
24 17 38 17.06 -26 59 34.80 3.51 (1.1 ± 1.1) x 10-3 13009 3.392 1.066
25 17 38 12.85 -26 58 48.26 3.51 (10 ± 10) x 10-4 554 3.132 1.051
26 17 38 19.41 -27 00 35.99 3.51 (1.0 ± 1.0) x 10-3 949 2.636 1.009
27 17 38 29.41 -27 00 34.86 4.00 (1.1 ± 1.1) x 10-3 77 2.830 0.960
28 17 38 15.59 -27 03 04.89 4.02 (9 ± 9) x 10-4 64 3.179 0.941
29 17 38 17.04 -26 59 39.48 3.51 (2 ± 2) x 10-3 12829 2.636 0.854
30 17 38 17.04 -26 59 39.50 3.51 (2 ± 3) x 10-3 12927 5.014 0.780
31 17 38 17.18 -26 59 39.63 3.51 (1 ± 2) x 10-3 12910 3.147 0.771
32 17 38 17.04 -26 59 39.52 3.51 (1 ± 2) x 10-3 13088 2.948 0.728
33 17 38 17.04 -26 59 39.52 3.51 (1 ± 2) x 10-3 13088 3.248 0.624
34 17 38 17.04 -26 59 39.48 3.51 (6 ± 11) x 10-4 12615 3.686 0.564
35 17 38 10.53 -27 00 22.04 3.58 (5 ± 11) x 10-4 258 3.860 0.486
36 17 38 17.04 -26 59 39.48 3.51 (1 ± 3) x 10-3 12495 5.459 0.397
37 17 38 16.57 -27 01 10.42 3.59 (3 ± 16) x 10-4 311 3.528 0.179
38 17 38 17.12 -26 58 58.67 3.51 (1 ± 15) x 10-4 6989 3.795 0.072
39 17 38 17.04 -26 59 39.51 3.51 N/A 13238 2.835 N/A
40 17 38 17.04 -26 59 39.50 3.51 N/A 12927 7.206 N/A
41 17 38 17.04 -26 59 39.52 3.51 N/A 13088 5.643 N/A
42 17 38 17.04 -26 59 39.48 3.51 N/A 12495 5.625 N/A
43 17 38 17.04 -26 59 39.48 3.51 N/A 12495 3.259 N/A
44 17 38 17.04 -26 59 39.48 3.51 N/A 12829 5.904 N/A
45 17 38 17.04 -26 59 39.48 3.51 N/A 12733 4.778 N/A
46 17 38 17.04 -26 59 39.48 3.51 N/A 12615 6.345 N/A
47 17 38 17.04 -26 59 39.50 3.51 N/A 12927 3.147 N/A
48 17 38 17.04 -26 59 39.48 3.51 N/A 12495 3.679 N/A
49 17 38 17.04 -26 59 39.48 3.51 N/A 12733 7.527 N/A
50 17 38 17.04 -26 59 39.48 3.51 N/A 12733 3.419 N/A
51 17 38 17.04 -26 59 39.48 3.51 N/A 12733 7.096 N/A
52 17 38 17.04 -26 59 39.50 3.51 N/A 12927 9.049 N/A
53 17 38 17.04 -26 59 39.48 3.51 N/A 12733 10.970 N/A
54 17 38 17.04 -26 59 39.48 3.51 N/A 12495 3.762 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
SLX 1735-269 17 38 17.76 -26 59 24.00 5.12 BEPPOSAX
SLX 1735-269 17 38 17.28 -26 59 31.20 5.28 INTEGRAL
SLX 1735-269 17 38 17.40 -26 59 27.60 5.28 INTEGRAL
SLX 1735-269 17 38 16.80 -26 59 24.00 5.29 INTEGRAL
IRAS 17345-265 17 38 16.51 -26 59 21.48 5.31 EINSTEIN
1 X173817.25-265938.4 17 38 17.26 -26 59 38.40 5.36 CHANDRA
SLX 1735-269 17 38 17.11 -26 59 38.76 5.38 INTEGRAL
SLX 1735-269 17 38 17.11 -26 59 38.76 5.38 null
SLX 1735-269 17 38 17.11 -26 59 39.12 5.39 INTEGRAL
CXO J173817.1-265939 17 38 17.11 -26 59 39.12 5.39 CHANDRA
X173817.10-265939.1 17 38 17.11 -26 59 39.12 5.39 CHANDRA
SLX 1735-269 17 38 17.40 -26 59 38.40 5.39 INTEGRAL
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
CXOGSG J173816.9-265938 17 38 16.99 -26 59 38.76 5.41 CHANDRA
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
X173817.04-265941.0 17 38 17.40 -26 59 40.92 5.42 CHANDRA
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 SLX 1735-269 17 38 14.40 -26 59 34.80 5.82 INTEGRAL
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 6.93 MGGAMMACAT
5 1RXS J173908.4-270245 17 39 08.40 -27 02 45.60 9.79 ROSAT
6 AX J1739.4-2656 17 39 28.99 -26 56 48.12 11.89 INTEGRAL

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 MGPS J173811-265043 17 38 11.59 -26 50 43.08 7.68 MGPS2
TGSSADR J173834.1-264801 17 38 34.10 -26 48 01.08 8.19 GMRTAS150M
2 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
3 NVSS J173805-265052 17 38 05.81 -26 50 53.16 8.54 NVSS
4 NVSS J173757-270104 17 37 57.91 -27 01 05.16 9.73 NVSS
MGPS J173757-270119 17 37 57.70 -27 01 18.84 9.89 MGPS2
TXS 1736-268 17 39 21.79 -26 55 36.12 10.30 TEXAS
MGPS J173921-265531 17 39 21.89 -26 55 31.08 10.31 MGPS2
TGSSADR J173921.9-265533 17 39 22.01 -26 55 32.88 10.34 GMRTAS150M
5 NVSS J173922-265533 17 39 22.10 -26 55 33.96 10.37 NVSS
6 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
TGSSADR J173850.1-264536 17 38 50.21 -26 45 36.00 11.08 GMRTAS150M
7 NVSS J173850-264536 17 38 50.30 -26 45 37.08 11.08 NVSS
8 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
TGSSADR J173743.0-265004 17 37 43.01 -26 50 04.92 13.25 GMRTAS150M

Penn State University Goddard Space Flight Center Swift