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 J1820.7-3217

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1820.7-3217 Swift-XRT detections in the field for 4FGL J1820.7-3217

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 21 20.83 -32 17 49.96 6.52 (5 ± 2) x 10-3 14 3.320 3.349

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 18 19 55.94 -32 19 53.76 7.27 (3.1 ± 1.2) x 10-3 10 2.630 2.708
2 18 20 21.46 -32 25 15.24 6.93 (2.5 ± 1.1) x 10-3 10 2.309 2.359

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1820.7-3217 Swift-XRT image with known radio, optical and UV sources for 4FGL J1820.7-3217

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1RXS J182051.3-322228 18 20 51.31 -32 22 28.56 5.16 ROSAT
2 4XMM J182010.1-321520 18 20 10.20 -32 15 20.88 7.82 XMM-NEWTON
4XMMs J182010.1-321519 18 20 10.13 -32 15 19.08 7.84 XMM-NEWTON
3 4XMM J182010.8-322128 18 20 10.85 -32 21 28.80 8.42 XMM-NEWTON
4XMMs J182010.7-322128 18 20 10.80 -32 21 28.44 8.43 XMM-NEWTON
4 4XMMs J182006.0-321830 18 20 06.07 -32 18 30.24 8.47 XMM-NEWTON
4XMM J182006.0-321831 18 20 06.05 -32 18 31.32 8.47 XMM-NEWTON
5 4XMMs J182021.9-322417 18 20 21.96 -32 24 17.28 8.50 XMM-NEWTON
4XMM J182022.0-322417 18 20 22.01 -32 24 18.00 8.50 XMM-NEWTON
6 4XMM J182011.1-322225 18 20 11.14 -32 22 26.04 8.87 XMM-NEWTON
4XMM J182011.1-322225 18 20 11.09 -32 22 26.04 8.87 XMM-NEWTON
4XMMs J182011.0-322226 18 20 11.06 -32 22 26.04 8.88 XMM-NEWTON
7 4XMM J182008.4-321256 18 20 08.47 -32 12 56.16 9.09 XMM-NEWTON
4XMMs J182008.4-321253 18 20 08.40 -32 12 53.28 9.13 XMM-NEWTON
8 4XMM J182004.0-322149 18 20 04.08 -32 21 48.60 9.84 XMM-NEWTON
4XMMs J182004.0-322149 18 20 04.01 -32 21 49.68 9.86 XMM-NEWTON
4XMM J182004.0-322149 18 20 04.01 -32 21 50.76 9.87 XMM-NEWTON
9 4XMMs J182000.8-322142 18 20 00.82 -32 21 42.12 10.42 XMM-NEWTON
4XMM J182000.7-322143 18 20 00.77 -32 21 43.92 10.44 XMM-NEWTON
10 4XMMs J181956.4-321959 18 19 56.42 -32 19 59.52 10.74 XMM-NEWTON
4XMM J181956.4-321958 18 19 56.40 -32 19 58.44 10.74 XMM-NEWTON
4XMM J181956.4-321958 18 19 56.40 -32 19 59.88 10.75 XMM-NEWTON
11 4XMMs J181952.8-322123 18 19 52.80 -32 21 23.76 11.88 XMM-NEWTON
12 4XMMs J182018.7-322824 18 20 18.79 -32 28 24.24 12.36 XMM-NEWTON
13 4XMMs J181958.6-322447 18 19 58.66 -32 24 47.16 12.37 XMM-NEWTON
14 4XMM J182009.7-322831 18 20 09.74 -32 28 31.08 13.44 XMM-NEWTON
4XMMs J182009.7-322831 18 20 09.77 -32 28 31.80 13.45 XMM-NEWTON
4XMM J182009.7-322831 18 20 09.74 -32 28 31.80 13.45 XMM-NEWTON
15 4XMM J182000.6-322907 18 20 00.70 -32 29 07.44 15.08 XMM-NEWTON
4XMMs J182000.5-322907 18 20 00.58 -32 29 07.44 15.09 XMM-NEWTON

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J182045-321621 18 20 45.60 -32 16 21.00 1.09 NVSS
[SPT2015] ATCA J1820-3216 18 20 45.19 -32 16 09.12 1.31 FER2FUSRID
[PME2013] J1820-3216 18 20 45.10 -32 16 08.04 1.31 AT2FGLUS
2 CD-3214037 18 20 35.16 -32 21 05.04 4.28 ACRS
PPM 297567 18 20 35.16 -32 21 05.04 4.28 PPM
SAO 210015 18 20 35.28 -32 21 06.84 4.30 SAO
3 HD 319285 18 21 05.04 -32 15 25.92 4.53 HDEC
4 HD 319291 18 20 23.71 -32 17 16.08 4.68 HDEC
5 V3104 Sgr 18 21 07.87 -32 16 37.56 4.73 GCVS
6 HD 319283 18 20 23.88 -32 12 31.68 6.76 HDEC
7 CD-3214024 18 20 17.18 -32 20 37.32 6.83 ACRS
PPM 297560 18 20 17.16 -32 20 37.32 6.84 PPM
168251 18 20 17.11 -32 20 38.40 6.86 WACKERLING
SAO 210009 18 20 17.09 -32 20 39.48 6.87 SAO
8 V3072 Sgr 18 20 21.41 -32 22 37.20 7.31 GCVS
9 HD 319284 18 21 12.50 -32 12 34.20 7.46 HDEC
10 V3116 Sgr 18 21 21.07 -32 17 57.48 7.47 GCVS
11 Ferrero 1 18 20 13.01 -32 21 06.12 7.84 OPENCLUST
12 NVSS J182108-321108 18 21 08.71 -32 11 08.88 7.94 NVSS
MGPS J182108-321059 18 21 08.50 -32 10 59.88 8.03 MGPS2
13 HD 319274 18 20 12.72 -32 12 56.88 8.32 HDEC
BR Sgr 18 20 12.41 -32 12 53.64 8.40 GCVS
14 HD 319290 18 21 18.67 -32 22 17.76 8.47 HDEC
15 HD 319292 18 20 18.12 -32 23 53.16 8.70 HDEC
16 CD-3214018 18 20 11.71 -32 22 26.76 8.77 ACRS
PPM 297557 18 20 11.71 -32 22 27.12 8.78 PPM
SAO 210004 18 20 11.64 -32 22 26.76 8.79 SAO
17 CD-3214017 18 20 06.70 -32 20 29.76 8.81 ACRS
PPM 297553 18 20 06.70 -32 20 29.40 8.81 PPM
SAO 210003 18 20 06.58 -32 20 31.20 8.84 SAO
18 V3064 Sgr 18 20 11.74 -32 22 58.08 9.08 GCVS
19 NVSS J182050-320811 18 20 50.11 -32 08 11.04 9.30 NVSS
20 SAO 210032 18 21 29.83 -32 15 01.44 9.62 SAO
CD-3214054 18 21 30.14 -32 15 01.80 9.68 ACRS
PPM 297587 18 21 30.22 -32 15 02.52 9.69 PPM
21 SAO 210027 18 21 20.02 -32 10 52.32 9.77 SAO
CD-3214051 18 21 19.92 -32 10 50.16 9.78 ACRS
PPM 297583 18 21 19.92 -32 10 49.80 9.78 PPM
22 HD 319289 18 21 21.72 -32 23 48.12 9.90 HDEC
23 PPM 297551 18 20 04.15 -32 22 03.36 9.94 PPM
CD-3214014 18 20 04.13 -32 22 03.00 9.94 ACRS
SAO 210001 18 20 04.01 -32 22 03.72 9.97 SAO
24 HD 319293 18 20 02.04 -32 21 39.24 10.16 HDEC
25 NVSS J182027-320724 18 20 27.70 -32 07 23.88 10.74 NVSS
26 V1600 Sgr 18 21 29.95 -32 11 51.36 10.88 GCVS
27 HD 319288 18 21 28.25 -32 23 43.80 10.95 HDEC
MGPS J182136-321508 18 21 36.70 -32 15 09.00 10.99 MGPS2
28 NVSS J182136-321514 18 21 36.91 -32 15 14.04 11.02 NVSS
29 HD 319286 18 21 37.37 -32 14 42.00 11.24 HDEC
30 V3070 Sgr 18 20 18.12 -32 27 15.12 11.42 GCVS
31 NSV 10665 18 21 35.71 -32 12 20.88 11.71 GCVSNSVARS
32 V3071 Sgr 18 20 19.75 -32 07 03.00 11.76 GCVS
33 HD 319276 18 20 17.09 -32 07 12.72 11.90 HDEC
34 NVSS J182032-320548 18 20 32.81 -32 05 48.84 11.95 NVSS
35 HD 319287 18 21 38.90 -32 23 15.00 12.63 HDEC
PPM 749635 18 21 38.93 -32 23 14.64 12.63 PPM
36 V3107 Sgr 18 21 11.30 -32 05 55.68 12.72 GCVS
37 NVSS J182138-321108 18 21 38.11 -32 11 08.88 12.73 NVSS
38 HD 319277 18 20 19.30 -32 05 41.64 13.02 HDEC
39 NVSS J181951-321107 18 19 51.91 -32 11 08.16 13.04 NVSS
40 V1854 Sgr 18 20 05.45 -32 28 42.96 14.13 GCVS
41 HD 319299 18 19 57.41 -32 28 44.76 15.24 HDEC
42 NVSS J181954-320649 18 19 54.00 -32 06 48.96 15.27 NVSS

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