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 J1809.2-2726

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1809.2-2726 Swift-XRT detections in the field for 4FGL J1809.2-2726

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 09 25.81 -27 28 37.15 5.40 (9 ± 3) x 10-3 27 3.582 3.584
2 18 09 54.98 -27 18 23.36 6.31 (6 ± 2) x 10-3 14 3.103 3.102
3 18 09 41.54 -27 35 04.92 6.52 (5 ± 2) x 10-3 14 2.738 3.067

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1809.2-2726 Swift-XRT image with known radio, optical and UV sources for 4FGL J1809.2-2726

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1WGA J1809.4-2728 18 09 24.10 -27 28 00.84 2.61 ROSAT
2 1WGA J1809.4-2730 18 09 25.80 -27 30 50.40 4.89 ROSAT
3 1WGA J1809.1-2731 18 09 10.10 -27 31 54.84 5.25 ROSAT
4 1WGA J1809.6-2725 18 09 41.59 -27 25 57.72 6.21 ROSAT
5 4XMM J180910.3-273414 18 09 10.37 -27 34 14.88 7.55 XMM-NEWTON
6 4XMM J180936.2-273358 18 09 36.31 -27 33 58.32 8.79 XMM-NEWTON
7 4XMM J180834.5-272821 18 08 34.61 -27 28 21.36 8.85 XMM-NEWTON
8 4XMM J180908.3-273534 18 09 08.35 -27 35 34.44 8.92 XMM-NEWTON
9 4XMM J180911.5-273553 18 09 11.54 -27 35 53.16 9.16 XMM-NEWTON
10 4XMM J180847.9-273428 18 08 47.98 -27 34 28.92 9.64 XMM-NEWTON
11 1WGA J1809.7-2734 18 09 42.41 -27 34 15.96 9.84 ROSAT
12 4XMM J180916.6-273656 18 09 16.68 -27 36 56.88 10.23 XMM-NEWTON
13 4XMM J180941.7-273504 18 09 41.76 -27 35 04.20 10.38 XMM-NEWTON
14 4XMM J180841.7-273425 18 08 41.76 -27 34 26.04 10.48 XMM-NEWTON
15 4XMM J180923.2-273728 18 09 23.28 -27 37 28.92 10.95 XMM-NEWTON
16 4XMM J180848.8-273649 18 08 48.86 -27 36 49.68 11.51 XMM-NEWTON
17 4XMM J180928.8-273745 18 09 28.90 -27 37 45.12 11.51 XMM-NEWTON
18 4XMM J180936.0-273715 18 09 36.07 -27 37 14.88 11.61 XMM-NEWTON
19 4XMM J180857.5-273747 18 08 57.53 -27 37 48.00 11.64 XMM-NEWTON
20 4XMM J180907.8-273825 18 09 07.82 -27 38 25.44 11.77 XMM-NEWTON
4XMM J180937.4-273725 18 09 37.49 -27 37 25.32 11.90 XMM-NEWTON
21 4XMM J180840.6-273617 18 08 40.63 -27 36 17.28 12.06 XMM-NEWTON
22 4XMM J180853.3-273804 18 08 53.35 -27 38 04.56 12.21 XMM-NEWTON
23 4XMM J180927.1-273842 18 09 27.14 -27 38 42.72 12.34 XMM-NEWTON
24 4XMM J180828.1-273412 18 08 28.10 -27 34 12.36 12.59 XMM-NEWTON
25 1RXS J180957.5-271839 18 09 57.48 -27 18 38.88 12.62 ROSAT
26 4XMM J180843.6-273802 18 08 43.61 -27 38 02.40 13.14 XMM-NEWTON
27 4XMM J180823.6-273518 18 08 23.64 -27 35 18.96 14.05 XMM-NEWTON
28 4XMM J180836.7-273831 18 08 36.77 -27 38 31.92 14.38 XMM-NEWTON
29 4XMM J180820.2-273508 18 08 20.21 -27 35 08.88 14.56 XMM-NEWTON
30 4XMM J180833.9-273837 18 08 33.98 -27 38 37.68 14.81 XMM-NEWTON
31 4XMM J180826.8-273734 18 08 26.88 -27 37 33.96 15.02 XMM-NEWTON
32 4XMM J180820.8-273635 18 08 20.83 -27 36 35.64 15.34 XMM-NEWTON
33 4XMM J180825.6-273817 18 08 25.66 -27 38 17.88 15.74 XMM-NEWTON
34 4XMM J180820.6-273751 18 08 20.69 -27 37 51.96 16.21 XMM-NEWTON

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 V5799 Sgr 18 09 02.52 -27 25 39.72 2.73 GCVS
2 V5801 Sgr 18 09 35.71 -27 29 47.76 5.74 GCVS
3 NVSS J180912-272011 18 09 12.50 -27 20 11.04 6.56 NVSS
4 V5794 Sgr 18 08 48.02 -27 22 33.96 7.09 GCVS
5 PPM 733719 18 08 48.77 -27 31 37.56 7.40 PPM
6 HD 317134 18 09 48.98 -27 28 39.00 8.03 HDEC
7 HD 317133 18 09 54.29 -27 25 09.84 9.12 HDEC
8 HD 317135 18 09 39.77 -27 34 13.44 9.44 HDEC
9 NVSS J180902-273649 18 09 02.59 -27 36 50.04 10.40 NVSS
10 ESO 180648-2732.0 18 09 56.40 -27 31 22.80 10.52 ESOUPPSALA
11 NGC 6556 18 10 00.00 -27 31 00.12 11.09 NGC2000
12 HD 317132 18 08 23.47 -27 26 22.56 11.18 HDEC
13 SAO 186342 18 08 38.06 -27 18 49.68 11.21 SAO
PPM 267924 18 08 37.97 -27 18 50.40 11.21 PPM
14 NVSS J180922-271535 18 09 22.80 -27 15 34.92 11.32 NVSS
15 NVSS J180859-273738 18 08 59.21 -27 37 39.00 11.38 NVSS
16 SAO 186337 18 08 22.73 -27 24 15.84 11.60 SAO
PPM 267921 18 08 22.58 -27 24 16.92 11.63 PPM
HD 317131 18 08 22.56 -27 24 16.92 11.64 HDEC
17 HD 315248 18 08 31.30 -27 16 05.52 14.23 HDEC
18 NVSS J180824-271505 18 08 24.41 -27 15 06.12 16.00 NVSS

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