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 J1740.5-2726

Field

Detected Excesses
Swift-XRT image of the field for 3FGL J1740.5-2726 Swift-XRT detections in the field for 3FGL J1740.5-2726

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 17 40 38.42 -27 37 08.32 3.57 (9.2 ± 0.3) x 10-2 1144 32.000 30.830
2 17 40 52.52 -27 23 50.52 3.94 (8.2 ± 1.0) x 10-3 134 8.097 7.991
3 17 39 35.50 -27 29 33.64 5.14 (2.2 ± 0.5) x 10-3 26 3.583 3.999
4 17 39 47.01 -27 18 10.47 5.53 (1.1 ± 0.4) x 10-3 17 3.387 3.046

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 40 52.52 -27 23 50.52 3.94 (2.0 ± 0.6) x 10-3 134 3.388 3.289
2 17 39 45.95 -27 37 58.91 4.21 (1.3 ± 0.5) x 10-3 37 2.843 2.760
3 17 40 45.28 -27 25 59.76 4.02 (1.2 ± 0.5) x 10-3 102 3.526 2.299
4 17 40 16.62 -27 28 07.56 3.92 (1.2 ± 0.6) x 10-3 107 2.992 2.177
5 17 40 37.62 -27 38 06.32 3.60 (1.3 ± 0.7) x 10-3 88 2.840 1.943
6 17 40 38.42 -27 37 08.57 3.57 N/A 1128 3.374 N/A
7 17 40 38.42 -27 37 08.57 3.57 N/A 1124 3.346 N/A

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 3FGL J1740.5-2726 Swift-XRT image with known radio, optical and UV sources for 3FGL J1740.5-2726

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 CXOGBS J174034.0-272548 17 40 34.80 -27 25 48.00 1.26 CHANDRA
X174034.08-272548.1 17 40 34.80 -27 25 48.00 1.26 CHANDRA
CXOGSG J174034.0-272548 17 40 34.90 -27 25 48.00 1.27 CHANDRA
2 X174050.57-272615.0 17 40 50.57 -27 26 15.00 4.13 CHANDRA
3 X174049.87-272900.7 17 40 49.87 -27 29 00.60 4.39 CHANDRA
4 X174053.20-272759.9 17 40 53.21 -27 27 59.76 4.75 CHANDRA
5 CXOGBS J174050.7-272413 17 40 50.71 -27 24 13.68 4.94 CHANDRA
X174050.70-272413.7 17 40 50.71 -27 24 13.68 4.94 CHANDRA
6 X174017.66-273057.2 17 40 17.66 -27 30 57.24 5.11 CHANDRA
CXOGBS J174017.6-273057 17 40 17.66 -27 30 57.24 5.11 CHANDRA
7 X174055.39-272659.8 17 40 55.39 -27 26 59.64 5.13 CHANDRA
8 CXOGSG J174044.9-272155 17 40 44.98 -27 21 55.08 5.81 CHANDRA
CXOGBS J174044.9-272155 17 40 44.98 -27 21 55.08 5.81 CHANDRA
X174044.98-272155.2 17 40 44.98 -27 21 55.08 5.81 CHANDRA
9 X174053.24-273101.4 17 40 53.23 -27 31 01.56 6.15 CHANDRA
CXOGSG J174053.2-273101 17 40 53.23 -27 31 01.56 6.15 CHANDRA
10 X174038.63-272009.7 17 40 38.64 -27 20 09.60 6.98 CHANDRA
11 X174025.25-273355.6 17 40 25.25 -27 33 55.44 7.10 CHANDRA
12 CXOGSG J174042.0-272014 17 40 42.91 -27 20 14.28 7.10 CHANDRA
13 CXOGSG J174105.1-272704 17 41 05.11 -27 27 04.32 7.28 CHANDRA
14 CXOGBS J173958.7-272532 17 39 58.80 -27 25 32.16 7.57 CHANDRA
15 X174024.48-273438.9 17 40 24.48 -27 34 39.00 7.84 CHANDRA
16 X174103.35-273159.4 17 41 03.36 -27 31 59.52 8.51 CHANDRA
17 X174027.30-271812.3 17 40 27.31 -27 18 12.24 8.86 CHANDRA
18 CXOGSG J174049.6-273505 17 40 49.66 -27 35 04.92 8.96 CHANDRA
19 X174023.89-271742.5 17 40 23.88 -27 17 42.36 9.48 CHANDRA
CXOGBS J174023.8-271742 17 40 23.88 -27 17 42.36 9.48 CHANDRA
20 1RXS J174052.3-273532 17 40 52.30 -27 35 31.92 9.62 ROSAT
1RXS J174052.3-273532 17 40 52.30 -27 35 31.92 9.62 ROSAT
21 X173951.66-272308.3 17 39 51.65 -27 23 08.16 9.81 CHANDRA
22 CXOGSG J173948.4-272416 17 39 48.48 -27 24 16.20 10.10 CHANDRA
X173948.46-272416.2 17 39 48.46 -27 24 16.20 10.10 CHANDRA
CXOGBS J173948.4-272416 17 39 48.46 -27 24 16.20 10.10 CHANDRA
23 X173946.52-272734.0 17 39 46.51 -27 27 33.84 10.17 CHANDRA
CXOGSG J173946.5-272733 17 39 46.51 -27 27 33.84 10.17 CHANDRA
24 CXOGSG J174037.5-273721 17 40 37.56 -27 37 21.36 10.43 CHANDRA
X174037.57-273721.6 17 40 37.56 -27 37 21.72 10.43 CHANDRA
CXOGBS J174037.5-273721 17 40 37.56 -27 37 21.72 10.43 CHANDRA
25 CXOGBS J174041.1-273748 17 40 41.14 -27 37 49.08 10.99 CHANDRA
26 X174107.91-273446.3 17 41 07.92 -27 34 46.20 11.08 CHANDRA
27 X174033.55-273806.5 17 40 33.55 -27 38 06.36 11.11 CHANDRA
CXOGSG J174033.5-273807 17 40 33.58 -27 38 07.80 11.13 CHANDRA
CXOGBS J174041.7-273803 17 40 41.71 -27 38 03.84 11.26 CHANDRA
CXOGSG J174041.7-273803 17 40 41.71 -27 38 03.84 11.26 CHANDRA
X174041.70-273803.7 17 40 41.71 -27 38 03.84 11.26 CHANDRA
CXO J174041.7-273803 17 40 41.74 -27 38 03.84 11.26 CHANDRA
X174041.68-273804.0 17 40 41.69 -27 38 03.84 11.26 CHANDRA
28 X174041.36-271541.9 17 40 41.35 -27 15 41.76 11.48 CHANDRA
CXOGBS J174041.3-271541 17 40 41.35 -27 15 41.76 11.48 CHANDRA
CXOGSG J174041.5-271541 17 40 41.54 -27 15 41.76 11.49 CHANDRA
29 X174124.96-272442.9 17 41 24.96 -27 24 42.84 11.91 CHANDRA
30 X174114.25-273502.5 17 41 14.26 -27 35 02.40 12.30 CHANDRA
31 1RXS J174049.2-271511 17 40 49.20 -27 15 11.52 12.39 ROSAT
32 CXOGSG J174125.0-273143 17 41 25.30 -27 31 42.96 12.61 CHANDRA
X174125.04-273143.0 17 41 25.39 -27 31 42.96 12.62 CHANDRA
CXOGBS J174125.0-273143 17 41 25.39 -27 31 42.96 12.62 CHANDRA
33 X173938.08-272135.5 17 39 38.81 -27 21 35.64 13.19 CHANDRA
CXOGBS J173938.0-272135 17 39 38.81 -27 21 35.64 13.19 CHANDRA
CXOGSG J173938.0-272135 17 39 38.71 -27 21 35.28 13.19 CHANDRA
34 CXOGSG J173946.9-271809 17 39 46.99 -27 18 09.36 13.39 CHANDRA
CXOGBS J173946.9-271809 17 39 46.99 -27 18 09.36 13.39 CHANDRA
X173946.98-271809.5 17 39 46.99 -27 18 09.36 13.39 CHANDRA
35 CXOGBS J173939.7-271908 17 39 39.72 -27 19 08.04 14.07 CHANDRA
36 CXOGSG J174115.4-273741 17 41 15.46 -27 37 41.16 14.34 CHANDRA

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J174059-272102 17 40 59.50 -27 21 02.16 8.50 NVSS
MGPS J174059-272101 17 40 59.59 -27 21 01.08 8.51 MGPS2
TGSSADR J174059.5-272100 17 40 59.59 -27 21 01.08 8.52 GMRTAS150M
[WBH2005] G0.814+1.701 17 40 59.59 -27 21 01.08 8.52 WBHGP20CM
2 MGPS J174100-273340 17 41 00.19 -27 33 39.96 9.11 MGPS2
3 NVSS J174109-273055 17 41 09.70 -27 30 55.08 9.18 NVSS
MGPS J174109-273123 17 41 09.10 -27 31 23.88 9.28 MGPS2
PSR J1741-2733 17 41 01.30 -27 33 51.12 9.40 PMPULSAR
PSR J1741-2733 17 41 01.30 -27 33 51.12 9.40 ATNFPULSAR
4 NVSS J174110-273219 17 41 10.20 -27 32 18.96 9.94 NVSS
5 [WBH2005] G0.773+1.594 17 41 18.10 -27 26 29.04 10.19 WBHGP20CM
[WBH2005] G0.635+1.539 17 41 10.99 -27 35 17.88 11.94 WBHGP20CM
6 NVSS J174111-273518 17 41 11.11 -27 35 17.88 11.97 NVSS
TGSSADR J174111.1-273518 17 41 11.21 -27 35 18.96 11.98 GMRTAS150M
MGPS J174111-273522 17 41 10.99 -27 35 21.84 11.99 MGPS2
GCPS 0.636+1.537 17 41 11.50 -27 35 17.88 12.02 GCPS
7 [WBH2005] G0.462+1.709 17 40 07.30 -27 38 42.00 12.93 WBHGP20CM
8 NVSS J173945-271807 17 39 46.01 -27 18 06.84 13.59 NVSS
9 NVSS J174106-271514 17 41 06.50 -27 15 15.12 14.00 NVSS

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