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.

2FGL J1857.6+0211

Field

Detected Excesses
Swift-XRT image of the field for 2FGL J1857.6+0211 Swift-XRT detections in the field for 2FGL J1857.6+0211

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 57 11.29 +02 04 29.96 3.66 (2.54 ± 0.14) x 10-2 464 21.900 18.710
2 18 56 43.43 +02 19 20.67 4.40 (2.4 ± 0.4) x 10-3 48 5.980 5.904
3 18 56 51.36 +02 10 20.73 4.37 (1.6 ± 0.4) x 10-3 42 5.083 4.449
4 18 56 45.68 +02 06 40.18 4.48 (1.1 ± 0.3) x 10-3 39 4.547 3.670
5 18 57 35.10 +02 17 08.02 5.05 (1.1 ± 0.3) x 10-3 28 3.716 3.636
6 18 56 58.30 +02 27 34.25 5.44 (9 ± 3) x 10-4 17 2.980 3.500
7 18 58 09.69 +02 21 33.71 6.52 (7 ± 2) x 10-4 14 2.896 3.188

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 57 08.74 +02 06 09.12 4.17 (5 ± 3) x 10-4 41 3.020 2.027
2 18 57 11.29 +02 04 29.96 3.66 N/A 462 4.225 N/A
3 18 57 11.29 +02 04 29.96 3.66 N/A 468 3.543 N/A
4 18 57 11.29 +02 04 29.89 3.66 N/A 462 3.809 N/A

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 2FGL J1857.6+0211 Swift-XRT image with known radio, optical and UV sources for 2FGL J1857.6+0211

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 CXOGSG J185800.4+020923 18 58 00.46 +02 09 23.76 5.31 CHANDRA
CXO J185800.4+020923 18 58 00.46 +02 09 23.40 5.32 CHANDRA
X185800.46+020923.3 18 58 00.46 +02 09 23.40 5.32 CHANDRA
2 X185744.67+020509.0 18 57 44.66 +02 05 08.88 6.17 CHANDRA
3 CXO J185805.6+021101 18 58 05.62 +02 11 02.04 6.28 CHANDRA
X185805.86+021059.5 18 58 05.86 +02 10 59.52 6.34 CHANDRA
4 CXOGSG J185754.3+020533 18 57 54.36 +02 05 33.36 6.65 CHANDRA
X185754.44+020532.6 18 57 54.43 +02 05 32.64 6.67 CHANDRA
5 X185753.12+020508.1 18 57 53.11 +02 05 08.16 6.86 CHANDRA
6 X185808.96+020956.3 18 58 08.95 +02 09 56.16 7.23 CHANDRA
7 CXOGSG J185806.4+020747 18 58 06.43 +02 07 47.64 7.33 CHANDRA
X185806.48+020747.9 18 58 06.48 +02 07 48.00 7.34 CHANDRA
CXO J185806.4+020747 18 58 06.48 +02 07 47.64 7.34 CHANDRA
8 X185810.21+021114.8 18 58 10.20 +02 11 14.64 7.43 CHANDRA
9 X185804.89+020618.4 18 58 04.90 +02 06 18.36 7.83 CHANDRA
10 CXO J185808.9+020651 18 58 08.98 +02 06 51.48 8.35 CHANDRA
X185808.97+020651.3 18 58 08.98 +02 06 51.48 8.35 CHANDRA
CXOGSG J185808.9+020651 18 58 08.98 +02 06 51.84 8.35 CHANDRA
11 CXOGSG J185810.7+020730 18 58 10.70 +02 07 30.36 8.42 CHANDRA
CXO J185810.7+020730 18 58 10.70 +02 07 30.00 8.42 CHANDRA
X185810.71+020730.0 18 58 10.70 +02 07 30.00 8.42 CHANDRA
12 X185813.62+020917.6 18 58 13.61 +02 09 17.64 8.50 CHANDRA
13 X185813.13+020834.4 18 58 13.13 +02 08 34.44 8.58 CHANDRA
14 X185723.82+021844.1 18 57 23.83 +02 18 43.92 8.59 CHANDRA
X185809.86+020639.2 18 58 09.86 +02 06 39.24 8.65 CHANDRA
15 CXOGSG J185806.0+020519 18 58 06.50 +02 05 19.68 8.69 CHANDRA
16 X185813.28+020801.9 18 58 13.27 +02 08 02.04 8.79 CHANDRA
17 X185808.40+020507.0 18 58 08.40 +02 05 07.08 9.27 CHANDRA
18 X185802.17+020340.1 18 58 02.16 +02 03 39.96 9.30 CHANDRA
CXOGSG J185802.1+020340 18 58 02.16 +02 03 39.96 9.30 CHANDRA
19 X185737.66+022044.4 18 57 37.66 +02 20 44.52 9.54 CHANDRA
20 X185738.34+020128.3 18 57 38.35 +02 01 28.20 9.77 CHANDRA
21 X185807.98+020412.0 18 58 07.97 +02 04 12.00 9.83 CHANDRA
CXO J185807.9+020411 18 58 07.97 +02 04 12.00 9.83 CHANDRA
CXOGSG J185807.9+020411 18 58 07.97 +02 04 11.64 9.83 CHANDRA
22 CXO J185753.5+020154 18 57 53.52 +02 01 54.84 9.86 CHANDRA
CXOGSG J185753.4+020154 18 57 53.47 +02 01 54.12 9.87 CHANDRA
X185753.56+020154.1 18 57 53.57 +02 01 54.12 9.88 CHANDRA
23 CXO J185746.8+020124 18 57 46.85 +02 01 24.60 9.95 CHANDRA
CXOGSG J185746.8+020123 18 57 46.82 +02 01 23.88 9.96 CHANDRA
CXOGSG J185752.8+020135 18 57 52.87 +02 01 35.76 10.12 CHANDRA
CXO J185752.9+020134 18 57 52.92 +02 01 34.68 10.13 CHANDRA
X185752.95+020134.1 18 57 52.94 +02 01 33.96 10.15 CHANDRA
24 X185815.15+020543.0 18 58 15.14 +02 05 43.08 10.26 CHANDRA
CXOGSG J185815.1+020542 18 58 15.17 +02 05 43.08 10.27 CHANDRA
25 X185819.70+020725.5 18 58 19.70 +02 07 25.68 10.51 CHANDRA
26 X185817.24+020538.1 18 58 17.23 +02 05 38.04 10.75 CHANDRA
CXOGSG J185817.2+020538 18 58 17.23 +02 05 38.04 10.75 CHANDRA
CXO J185817.2+020538 18 58 17.23 +02 05 38.04 10.75 CHANDRA
27 X185746.69+020017.5 18 57 46.68 +02 00 17.64 11.04 CHANDRA
CXOGSG J185746.7+020016 18 57 46.70 +02 00 16.56 11.06 CHANDRA
28 X185805.87+020153.2 18 58 05.88 +02 01 53.04 11.29 CHANDRA
29 X185826.46+020949.8 18 58 26.45 +02 09 49.68 11.57 CHANDRA
CXO J185826.5+020923 18 58 26.50 +02 09 23.04 11.64 CHANDRA
30 X185750.71+015944.3 18 57 50.71 +01 59 44.16 11.77 CHANDRA
CXOGSG J185750.7+015943 18 57 50.74 +01 59 43.80 11.78 CHANDRA
CXO J185750.7+015943 18 57 50.71 +01 59 43.80 11.78 CHANDRA
31 CXOGSG J185820.3+020425 18 58 20.30 +02 04 25.68 12.05 CHANDRA
CXO J185820.3+020425 18 58 20.30 +02 04 25.32 12.05 CHANDRA
32 X185803.42+020037.2 18 58 03.41 +02 00 37.08 12.06 CHANDRA
33 CXO J185822.2+020454 18 58 22.20 +02 04 54.48 12.19 CHANDRA
X185822.21+020454.5 18 58 22.20 +02 04 54.48 12.19 CHANDRA
CXOGSG J185822.2+020454 18 58 22.20 +02 04 54.48 12.19 CHANDRA
34 CXOGSG J185806.2+020040 18 58 06.24 +02 00 41.04 12.35 CHANDRA
X185806.25+020040.8 18 58 06.24 +02 00 40.68 12.35 CHANDRA
1WGA J1858.1+0221 18 58 09.19 +02 21 35.64 12.61 ROSAT
2RXP J185809.4+022135 18 58 09.34 +02 21 34.92 12.62 ROSAT
35 XMMSL2 J185810.2+022129 18 58 10.37 +02 21 29.16 12.69 XMM-NEWTON
36 X185759.81+015920.6 18 57 59.81 +01 59 20.76 12.82 CHANDRA
37 1RXS J185809.2+022156 18 58 09.22 +02 21 56.52 12.90 ROSAT
38 X185803.83+015941.3 18 58 03.84 +01 59 41.28 12.93 CHANDRA
CXOGSG J185803.8+015941 18 58 03.86 +01 59 40.92 12.94 CHANDRA
39 X185813.06+020059.9 18 58 13.61 +02 00 59.76 13.07 CHANDRA
CXOGSG J185813.0+020100 18 58 13.80 +02 01 00.12 13.07 CHANDRA
CXOGSG J185812.4+020049 18 58 12.48 +02 00 49.68 13.11 CHANDRA
CXO J185812.4+020049 18 58 12.48 +02 00 49.68 13.12 CHANDRA
X185812.48+020049.5 18 58 12.48 +02 00 49.68 13.12 CHANDRA
40 CXOGSG J185825.8+020424 18 58 25.90 +02 04 24.60 13.23 CHANDRA
CXO J185815.0+020046 18 58 15.29 +02 00 46.44 13.55 CHANDRA
CXOGSG J185815.0+020046 18 58 15.29 +02 00 46.44 13.55 CHANDRA
X185815.03+020046.4 18 58 15.29 +02 00 46.44 13.56 CHANDRA
41 CXOGSG J185811.2+015919 18 58 11.28 +01 59 19.68 14.17 CHANDRA
X185811.31+015919.5 18 58 11.30 +01 59 19.68 14.17 CHANDRA
42 X185652.87+021856.7 18 56 52.87 +02 18 56.88 14.18 CHANDRA
43 CXO J185822.3+020056 18 58 22.32 +02 00 56.52 14.66 CHANDRA
X185822.36+020056.8 18 58 22.37 +02 00 56.88 14.66 CHANDRA
CXOGSG J185822.3+020056 18 58 22.37 +02 00 56.88 14.67 CHANDRA
44 CXOGSG J185823.4+020018 18 58 23.42 +02 00 18.00 15.31 CHANDRA

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 PSR J1857+0210 18 57 40.90 +02 10 58.08 0.28 PMPULSAR
PSR J1857+0210 18 57 40.90 +02 10 58.08 0.28 ATNFPULSAR
2 [SPT2015] VLA J1857+0212 18 57 37.20 +02 12 32.04 1.54 FER2FUSRID
[WBH2005] G35.602-0.367 18 57 37.10 +02 12 32.04 1.55 WBHGP20CM
[WBH2005] G35.602-0.367 18 57 37.10 +02 12 32.04 1.55 WBHGP6CM
[PME2013] J1857+0212 18 57 37.20 +02 12 33.84 1.57 AT2FGLUS
3 PSR J1857+0212 18 57 43.61 +02 12 41.04 1.66 ATNFPULSAR
4 DKM035.6-00.4 18 57 49.39 +02 10 05.16 2.50 DIXON
BK 035.6-00.4 18 57 49.39 +02 10 05.16 2.50 DIXON
5 MM 40 18 57 31.39 +02 10 04.08 2.56 DIXON
HR 13 18 57 49.39 +02 09 41.04 2.70 DIXON
6 ADG035.6-00.4 18 57 49.39 +02 09 29.16 2.82 DIXON
7 HC 16 18 57 49.30 +02 14 04.92 3.60 DIXON
8 NVSS J185725+021050 18 57 25.70 +02 10 50.88 3.73 NVSS
9 NVSS J185726+020944 18 57 26.50 +02 09 45.00 3.79 NVSS
10 SNR G035.6-00.4 18 57 55.01 +02 13 00.12 4.04 SNRGREEN
11 GPA 035.61-0.46 18 57 58.01 +02 10 36.12 4.42 GPA
12 NVSS J185753+021456 18 57 53.71 +02 14 56.04 4.97 NVSS
13 NVSS J185757+021405 18 57 57.41 +02 14 04.92 5.09 NVSS
14 NVSS J185801+021155 18 58 01.30 +02 11 54.96 5.24 NVSS
15 NVSS J185800+020922 18 58 00.60 +02 09 23.04 5.36 NVSS
16 NK1.50 18 58 00.41 +02 07 58.08 5.95 DIXON
17 NVSS J185805+021122 18 58 05.40 +02 11 21.84 6.22 NVSS
[WBH2005] G35.565-0.491 18 57 59.59 +02 07 06.96 6.30 WBHGP20CM
18 NVSS J185759+020708 18 57 59.71 +02 07 09.12 6.31 NVSS
19 NVSS J185731+020505 18 57 31.61 +02 05 06.00 6.52 NVSS
[WBH2005] G35.483-0.360 18 57 22.61 +02 06 23.04 6.59 WBHGP6CM
20 [WBH2005] G35.487-0.342 18 57 19.10 +02 07 04.08 6.77 WBHGP6CM
21 NVSS J185722+020555 18 57 22.20 +02 05 54.96 7.01 NVSS
22 NVSS J185808+020943 18 58 07.99 +02 09 43.92 7.04 NVSS
23 TXS 1855+020 18 58 04.90 +02 07 05.16 7.37 TEXAS
24 BG 1855+02 18 58 02.69 +02 06 06.12 7.57 DIXON
25 NVSS J185737+020340 18 57 37.70 +02 03 39.96 7.59 NVSS
[WBH2005] G35.472-0.436 18 57 37.61 +02 03 38.88 7.60 WBHGP20CM
26 NVSS J185808+020813 18 58 08.69 +02 08 12.84 7.66 NVSS
27 NVSS J185735+020216 18 57 35.69 +02 02 17.16 9.03 NVSS
28 [WBH2005] G35.707-0.485 18 58 13.90 +02 14 52.08 9.11 WBHGP20CM
29 NVSS J185810+020534 18 58 10.39 +02 05 34.08 9.36 NVSS
30 NVSS J185705+021523 18 57 05.59 +02 15 23.04 9.66 NVSS
[WBH2005] G35.734-0.465 18 58 12.60 +02 16 51.96 9.80 WBHGP20CM
31 NVSS J185707+021631 18 57 07.20 +02 16 31.08 9.85 NVSS
32 NVSS J185812+021703 18 58 12.60 +02 17 03.12 9.91 NVSS
33 PSR J1858+0215 18 58 17.40 +02 15 38.16 10.22 PMPULSAR
PSR J1858+0215 18 58 17.40 +02 15 38.16 10.23 ATNFPULSAR
34 NVSS J185726+022108 18 57 26.11 +02 21 07.92 10.55 NVSS
35 NVSS J185742+020030 18 57 42.79 +02 00 30.96 10.73 NVSS
NVSS J185743+020013 18 57 43.30 +02 00 12.96 11.03 NVSS
36 NVSS J185732+020010 18 57 32.21 +02 00 11.16 11.24 NVSS
37 NVSS J185733+015937 18 57 33.41 +01 59 36.96 11.74 NVSS
38 NVSS J185755+015950 18 57 55.39 +01 59 49.92 11.98 NVSS
39 PSR J1858+02 18 58 00.00 +02 00 00.00 12.24 ATNFPULSAR
40 NVSS J185716+022209 18 57 16.80 +02 22 09.84 12.43 NVSS
41 NVSS J185724+022301 18 57 24.31 +02 23 02.04 12.48 NVSS
42 NVSS J185813+022038 18 58 13.39 +02 20 39.12 12.50 NVSS
43 [WBH2005] G35.681-0.194 18 57 08.81 +02 21 28.08 12.95 WBHGP6CM
44 NVSS J185816+015959 18 58 16.70 +01 59 58.92 14.43 NVSS
45 NVSS J185826+020155 18 58 26.40 +02 01 54.84 14.78 NVSS
46 NVSS J185819+015918 18 58 19.80 +01 59 17.88 15.44 NVSS
47 NVSS J185827+015930 18 58 27.41 +01 59 30.84 16.56 NVSS

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