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 J1857.1+0212c

Field

Detected Excesses

Swift-XRT image of the field for 1FGL J1857.1+0212c Swift-XRT detections in the field for 1FGL J1857.1+0212c

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 57 11.27 +02 04 30.14 3.68 (2.37 ± 0.13) x 10-2 425 20.360 18.380
2 18 56 09.62 +02 17 42.63 4.12 (9.3 ± 1.0) x 10-3 111 10.040 9.733
3 18 56 43.62 +02 19 18.55 4.56 (2.3 ± 0.4) x 10-3 49 5.588 5.559
4 18 58 09.77 +02 21 30.50 5.20 (1.7 ± 0.3) x 10-3 30 4.774 5.305
5 18 56 51.48 +02 10 23.31 4.45 (1.8 ± 0.4) x 10-3 49 4.613 4.429
6 18 56 55.53 +02 13 37.45 4.60 (1.1 ± 0.3) x 10-3 45 3.514 3.337
7 18 56 46.13 +02 06 42.99 4.83 (9 ± 3) x 10-4 30 3.254 3.185
8 18 57 34.81 +02 17 09.11 5.20 (9 ± 3) x 10-4 18 3.025 3.144

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 56 22.48 +02 22 28.17 5.31 (7 ± 3) x 10-4 21 2.560 2.900
2 18 56 26.21 +02 07 39.64 4.86 (7 ± 3) x 10-4 26 2.852 2.442
3 18 56 31.68 +02 11 40.54 4.74 (6 ± 3) x 10-4 28 2.796 2.337
4 18 57 11.27 +02 04 30.14 3.68 (6 ± 6) x 10-4 425 3.001 0.913
5 18 57 11.27 +02 04 30.14 3.68 N/A 433 2.758 N/A
6 18 57 11.27 +02 04 30.14 3.68 N/A 433 2.660 N/A

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 1FGL J1857.1+0212c Swift-XRT image with known radio, optical and UV sources for 1FGL J1857.1+0212c

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 X185644.42+021652.7 18 56 44.42 +02 16 52.68 7.25 CHANDRA
2 X185652.87+021856.7 18 56 52.87 +02 18 56.88 7.54 CHANDRA
3 X185723.82+021844.1 18 57 23.83 +02 18 43.92 7.75 CHANDRA
4 CXOGSG J185648.0+021836 18 56 48.10 +02 18 36.36 7.90 CHANDRA
X185648.01+021836.6 18 56 48.10 +02 18 36.72 7.90 CHANDRA
ChI J185643+0220_1 18 56 48.00 +02 18 36.72 7.90 CHANDRA
X185646.66+021832.1 18 56 46.66 +02 18 32.04 8.04 CHANDRA
CXOGSG J185646.6+021832 18 56 46.66 +02 18 32.04 8.04 CHANDRA
5 X185643.74+021920.9 18 56 43.73 +02 19 21.00 9.14 CHANDRA
CXOGSG J185643.6+021921 18 56 43.61 +02 19 21.36 9.16 CHANDRA
ChI J185643+0220_2 18 56 43.61 +02 19 21.36 9.16 CHANDRA
X185643.61+021921.5 18 56 43.61 +02 19 21.36 9.16 CHANDRA
X185643.33+021920.6 18 56 43.32 +02 19 20.64 9.20 CHANDRA
AX J185643+0220 18 56 43.20 +02 20 16.80 9.95 ASCA
AX J1856.7+0220 18 56 43.01 +02 20 17.88 10.00 INTEGRAL
6 X185643.98+022035.8 18 56 43.99 +02 20 35.88 10.10 CHANDRA
ChI J185643+0220_3 18 56 43.99 +02 20 35.88 10.10 CHANDRA
7 X185737.66+022044.4 18 57 37.66 +02 20 44.52 11.46 CHANDRA
8 X185744.67+020509.0 18 57 44.66 +02 05 08.88 11.84 CHANDRA
9 X185738.34+020128.3 18 57 38.35 +02 01 28.20 13.36 CHANDRA
10 X185753.12+020508.1 18 57 53.11 +02 05 08.16 13.59 CHANDRA
11 CXOGSG J185754.3+020533 18 57 54.36 +02 05 33.36 13.64 CHANDRA
X185754.44+020532.6 18 57 54.43 +02 05 32.64 13.67 CHANDRA
12 CXO J185746.8+020124 18 57 46.85 +02 01 24.60 14.76 CHANDRA
CXOGSG J185746.8+020123 18 57 46.82 +02 01 23.88 14.77 CHANDRA
13 X185622.57+022214.5 18 56 22.56 +02 22 14.52 14.89 CHANDRA
CXOGSG J185622.6+022215 18 56 22.63 +02 22 15.60 14.89 CHANDRA
CXO J185622.5+022215 18 56 22.54 +02 22 15.24 14.91 CHANDRA
14 X185746.69+020017.5 18 57 46.68 +02 00 17.64 15.58 CHANDRA
CXOGSG J185746.7+020016 18 57 46.70 +02 00 16.56 15.59 CHANDRA
15 CXOGSG J185753.4+020154 18 57 53.47 +02 01 54.12 15.59 CHANDRA
CXO J185753.5+020154 18 57 53.52 +02 01 54.84 15.60 CHANDRA
X185753.56+020154.1 18 57 53.57 +02 01 54.12 15.61 CHANDRA
CXOGSG J185752.8+020135 18 57 52.87 +02 01 35.76 15.69 CHANDRA
CXO J185752.9+020134 18 57 52.92 +02 01 34.68 15.71 CHANDRA
X185752.95+020134.1 18 57 52.94 +02 01 33.96 15.72 CHANDRA

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J185705+021523 18 57 05.59 +02 15 23.04 3.14 NVSS
2 NVSS J185707+021631 18 57 07.20 +02 16 31.08 4.27 NVSS
3 NVSS J185725+021050 18 57 25.70 +02 10 50.88 4.92 NVSS
4 NVSS J185726+020944 18 57 26.50 +02 09 45.00 5.53 NVSS
5 [WBH2005] G35.487-0.342 18 57 19.10 +02 07 04.08 6.04 WBHGP6CM
6 MM 40 18 57 31.39 +02 10 04.08 6.52 DIXON
7 [WBH2005] G35.581-0.154 18 56 49.20 +02 17 15.00 6.64 WBHGP6CM
8 [WBH2005] G35.457-0.179 18 56 40.99 +02 09 56.16 6.86 WBHGP6CM
[WBH2005] G35.483-0.360 18 57 22.61 +02 06 23.04 7.07 WBHGP6CM
9 NVSS J185637+021156 18 56 37.39 +02 11 57.12 7.35 NVSS
10 NVSS J185722+020555 18 57 22.20 +02 05 54.96 7.41 NVSS
11 [WBH2005] G35.602-0.367 18 57 37.10 +02 12 32.04 7.59 WBHGP20CM
[WBH2005] G35.602-0.367 18 57 37.10 +02 12 32.04 7.59 WBHGP6CM
[PME2013] J1857+0212 18 57 37.20 +02 12 33.84 7.59 AT2FGLUS
[SPT2015] VLA J1857+0212 18 57 37.20 +02 12 32.04 7.60 FER2FUSRID
12 NVSS J185639+020849 18 56 39.00 +02 08 49.92 7.73 NVSS
13 NVSS J185638+020728 18 56 38.81 +02 07 27.84 8.46 NVSS
14 PSR J1857+0210 18 57 40.90 +02 10 58.08 8.62 PMPULSAR
PSR J1857+0210 18 57 40.90 +02 10 58.08 8.62 ATNFPULSAR
15 PSR J1857+0212 18 57 43.61 +02 12 41.04 9.22 ATNFPULSAR
16 [WBH2005] G35.681-0.194 18 57 08.81 +02 21 28.08 9.23 WBHGP6CM
17 NVSS J185731+020505 18 57 31.61 +02 05 06.00 9.47 NVSS
18 [WBH2005] G35.457-0.117 18 56 27.79 +02 11 39.12 9.76 WBHGP6CM
19 NVSS J185634+020625 18 56 34.70 +02 06 25.92 9.92 NVSS
20 NVSS J185726+022108 18 57 26.11 +02 21 07.92 10.10 NVSS
21 NVSS J185716+022209 18 57 16.80 +02 22 09.84 10.21 NVSS
22 TXS 1854+022 18 56 39.19 +02 19 53.04 10.28 TEXAS
23 [WBH2005] G35.455-0.107 18 56 25.51 +02 11 45.96 10.34 WBHGP6CM
[WBH2005] G35.455-0.107 18 56 25.51 +02 11 45.96 10.34 WBHGP20CM
24 HC 16 18 57 49.30 +02 14 04.92 10.77 DIXON
25 DKM035.6-00.4 18 57 49.39 +02 10 05.16 10.86 DIXON
BK 035.6-00.4 18 57 49.39 +02 10 05.16 10.86 DIXON
HR 13 18 57 49.39 +02 09 41.04 10.94 DIXON
26 ADG035.6-00.4 18 57 49.39 +02 09 29.16 10.99 DIXON
[WBH2005] G35.472-0.436 18 57 37.61 +02 03 38.88 11.54 WBHGP20CM
27 NVSS J185737+020340 18 57 37.70 +02 03 39.96 11.55 NVSS
28 NVSS J185724+022301 18 57 24.31 +02 23 02.04 11.62 NVSS
29 NVSS J185633+022052 18 56 33.19 +02 20 52.08 12.02 NVSS
30 NVSS J185753+021456 18 57 53.71 +02 14 56.04 12.03 NVSS
31 NVSS J185735+020216 18 57 35.69 +02 02 17.16 12.32 NVSS
32 [WBH2005] G35.578-0.030 18 56 22.61 +02 20 27.96 13.76 WBHGP6CM
[WBH2005] G35.578-0.030 18 56 22.51 +02 20 29.04 13.77 WBHGP20CM
33 NVSS J185626+020244 18 56 26.21 +02 02 44.16 13.91 NVSS
34 GB6 J1856+0222 18 56 28.51 +02 22 23.88 13.94 GB6
ADG035.6-00.0 18 56 23.21 +02 20 58.92 13.96 DIXON
35 HR 14 18 56 25.10 +02 21 34.92 13.97 DIXON
[WBH2005] G35.586-0.027 18 56 22.61 +02 21 00.00 14.08 WBHGP20CM
36 NVSS J185626+022212 18 56 26.59 +02 22 12.00 14.13 NVSS
GPA 035.61-0.03 18 56 25.39 +02 21 57.96 14.18 GPA
37 NVSS J185623+022121 18 56 23.11 +02 21 21.96 14.22 NVSS
38 PCCS2 070 G035.60-00.02 18 56 22.90 +02 21 52.92 14.59 PCCS070GHZ
39 NK1.46 18 56 28.10 +02 23 13.92 14.62 DIXON
40 NVSS J185742+020030 18 57 42.79 +02 00 30.96 14.79 NVSS
41 PCCS2 044 G035.58-00.01 18 56 18.91 +02 21 06.84 14.89 PCCS044GHZ
42 BK 035.6-00.0 18 56 21.10 +02 22 59.16 15.65 DIXON
43 NVSS J185623+022328 18 56 22.99 +02 23 27.96 15.67 NVSS
44 PCCS2 030 G035.60-00.00 18 56 19.30 +02 22 28.92 15.67 PCCS030GHZ

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