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 J2004.4+3338

Field

Detected Excesses
Swift-XRT image of the field for 3FGL J2004.4+3338 Swift-XRT detections in the field for 3FGL J2004.4+3338

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 20 05 40.47 +33 33 27.20 6.93 (2.7 ± 0.9) x 10-3 12 3.065 3.011

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 3FGL J2004.4+3338 Swift-XRT image with known radio, optical and UV sources for 3FGL J2004.4+3338

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 CXOGSG J200422.8+333843 20 04 22.87 +33 38 43.44 0.40 CHANDRA
CXO J200422.8+333843 20 04 22.85 +33 38 43.08 0.40 CHANDRA
X200422.84+333843.6 20 04 22.85 +33 38 43.44 0.40 CHANDRA
CXOGSG J200423.4+333906 20 04 23.42 +33 39 06.84 0.49 CHANDRA
X200423.43+333906.8 20 04 23.42 +33 39 06.84 0.49 CHANDRA
CXO J200423.4+333906 20 04 23.42 +33 39 06.84 0.49 CHANDRA
CXO J200422.1+333852 20 04 22.20 +33 38 52.44 0.56 CHANDRA
X200422.20+333853.1 20 04 22.20 +33 38 53.16 0.56 CHANDRA
X200422.19+333856.1 20 04 22.20 +33 38 56.04 0.58 CHANDRA
CXOGSG J200422.1+333855 20 04 22.10 +33 38 55.68 0.59 CHANDRA
CXO J200422.3+333903 20 04 22.32 +33 39 03.96 0.63 CHANDRA
2 CXOGSG J200424.4+333759 20 04 24.43 +33 37 59.52 0.72 CHANDRA
X200424.44+333759.4 20 04 24.43 +33 37 59.52 0.72 CHANDRA
CXO J200426.1+333751 20 04 26.11 +33 37 51.96 0.88 CHANDRA
X200426.10+333752.0 20 04 26.11 +33 37 51.96 0.88 CHANDRA
CXOGSG J200426.1+333751 20 04 26.11 +33 37 51.96 0.89 CHANDRA
CXO J200423.7+333749 20 04 23.71 +33 37 49.80 0.91 CHANDRA
X200423.68+333749.6 20 04 23.69 +33 37 49.44 0.91 CHANDRA
CXOGSG J200423.6+333749 20 04 23.69 +33 37 49.08 0.92 CHANDRA
3 X200422.12+333737.1 20 04 22.13 +33 37 37.20 1.22 CHANDRA
CXOGSG J200422.1+333737 20 04 22.13 +33 37 36.84 1.22 CHANDRA
4 CXOGSG J200418.5+333852 20 04 18.58 +33 38 52.08 1.30 CHANDRA
X200418.53+333852.0 20 04 18.53 +33 38 52.08 1.31 CHANDRA
5 CXOGSG J200424.0+334008 20 04 24.10 +33 40 08.40 1.45 CHANDRA
X200424.02+334008.8 20 04 24.19 +33 40 08.76 1.45 CHANDRA
6 CXOGSG J200420.9+334020 20 04 20.95 +33 40 20.28 1.82 CHANDRA
X200420.97+334020.5 20 04 20.98 +33 40 20.64 1.82 CHANDRA
CXO J200420.9+334020 20 04 20.98 +33 40 20.64 1.82 CHANDRA
7 CXO J200430.4+334010 20 04 30.48 +33 40 10.56 1.89 CHANDRA
CXOGSG J200430.4+334010 20 04 30.48 +33 40 10.56 1.89 CHANDRA
X200430.47+334010.7 20 04 30.48 +33 40 10.56 1.89 CHANDRA
8 CXOGSG J200416.8+333942 20 04 16.90 +33 39 42.48 1.92 CHANDRA
CXO J200416.8+333942 20 04 16.90 +33 39 42.48 1.92 CHANDRA
X200416.89+333942.6 20 04 16.90 +33 39 42.48 1.92 CHANDRA
9 CXO J200418.4+333712 20 04 18.41 +33 37 12.72 2.00 CHANDRA
X200418.41+333712.6 20 04 18.41 +33 37 12.72 2.00 CHANDRA
CXOGSG J200418.4+333712 20 04 18.41 +33 37 12.72 2.00 CHANDRA
10 CXOGSG J200431.7+333719 20 04 31.75 +33 37 19.56 2.00 CHANDRA
CXO J200431.7+333719 20 04 31.75 +33 37 19.56 2.01 CHANDRA
X200431.74+333719.2 20 04 31.75 +33 37 19.20 2.01 CHANDRA
11 X200434.47+333839.2 20 04 34.46 +33 38 39.12 2.02 CHANDRA
CXOGSG J200434.4+333839 20 04 34.46 +33 38 39.12 2.02 CHANDRA
CXO J200434.4+333839 20 04 34.49 +33 38 39.48 2.02 CHANDRA
12 X200426.57+334046.8 20 04 26.57 +33 40 46.92 2.11 CHANDRA
CXOGSG J200426.5+334046 20 04 26.57 +33 40 46.92 2.11 CHANDRA
X200416.01+333710.6 20 04 16.10 +33 37 10.56 2.38 CHANDRA
13 CXOGSG J200416.0+333710 20 04 16.01 +33 37 10.56 2.38 CHANDRA
14 CXOGSG J200429.1+334057 20 04 29.14 +33 40 57.36 2.43 CHANDRA
CXO J200429.1+334057 20 04 29.14 +33 40 58.08 2.43 CHANDRA
X200429.15+334057.9 20 04 29.16 +33 40 58.08 2.44 CHANDRA
15 X200437.01+333842.4 20 04 37.10 +33 38 42.36 2.55 CHANDRA
16 CXOGSG J200426.6+334118 20 04 26.64 +33 41 18.96 2.64 CHANDRA
CXO J200426.6+334119 20 04 26.66 +33 41 18.96 2.64 CHANDRA
X200426.65+334119.1 20 04 26.64 +33 41 18.96 2.64 CHANDRA
CXOGSG J200430.2+334105 20 04 30.22 +33 41 05.64 2.64 CHANDRA
X200430.22+334105.9 20 04 30.22 +33 41 06.00 2.65 CHANDRA
CXO J200430.2+334105 20 04 30.22 +33 41 06.00 2.65 CHANDRA
17 X200411.30+333905.6 20 04 11.30 +33 39 05.76 2.83 CHANDRA
CXOGSG J200411.2+333905 20 04 11.26 +33 39 05.76 2.84 CHANDRA
18 X200412.90+333717.8 20 04 12.91 +33 37 17.76 2.84 CHANDRA
CXOGSG J200412.8+333717 20 04 12.89 +33 37 17.76 2.85 CHANDRA
CXO J200412.8+333717 20 04 12.86 +33 37 17.76 2.85 CHANDRA
19 X200411.94+333948.6 20 04 11.95 +33 39 48.60 2.89 CHANDRA
CXOGSG J200411.9+333948 20 04 11.93 +33 39 48.24 2.89 CHANDRA
CXO J200410.0+333904 20 04 10.80 +33 39 03.96 3.08 CHANDRA
X200410.07+333903.9 20 04 10.70 +33 39 03.96 3.08 CHANDRA
CXOGSG J200410.0+333904 20 04 10.51 +33 39 03.96 3.08 CHANDRA
CXOGSG J200410.6+333958 20 04 10.61 +33 39 58.68 3.21 CHANDRA
X200410.59+333959.0 20 04 10.58 +33 39 59.04 3.21 CHANDRA
20 CXOGSG J200412.6+333633 20 04 12.67 +33 36 33.48 3.31 CHANDRA
X200412.60+333633.0 20 04 12.60 +33 36 33.12 3.33 CHANDRA
21 X200420.20+333528.6 20 04 20.21 +33 35 28.68 3.37 CHANDRA
CXOGSG J200420.1+333528 20 04 20.18 +33 35 28.32 3.37 CHANDRA
22 X200439.98+334017.7 20 04 39.98 +33 40 17.76 3.54 CHANDRA
23 CXOGSG J200427.1+334218 20 04 27.19 +33 42 18.36 3.63 CHANDRA
CXO J200427.2+334218 20 04 27.22 +33 42 18.36 3.64 CHANDRA
X200427.22+334218.4 20 04 27.22 +33 42 18.36 3.64 CHANDRA
24 CXOGSG J200408.8+333651 20 04 08.88 +33 36 51.84 3.79 CHANDRA
25 CXOGSG J200406.2+333839 20 04 06.24 +33 38 39.48 3.85 CHANDRA
26 CXOGSG J200411.6+333556 20 04 11.64 +33 35 56.40 3.89 CHANDRA
27 CXOGSG J200432.4+334223 20 04 32.45 +33 42 23.04 4.01 CHANDRA
X200432.51+334222.9 20 04 32.52 +33 42 23.04 4.01 CHANDRA
CXO J200432.5+334223 20 04 32.52 +33 42 23.04 4.02 CHANDRA
28 X200441.52+334132.0 20 04 41.52 +33 41 31.92 4.49 CHANDRA
CXO J200441.5+334132 20 04 41.52 +33 41 31.92 4.49 CHANDRA
CXOGSG J200441.5+334133 20 04 41.52 +33 41 33.36 4.50 CHANDRA
29 CXOGSG J200406.2+334116 20 04 06.29 +33 41 16.80 4.63 CHANDRA
CXO J200406.3+334117 20 04 06.31 +33 41 17.16 4.63 CHANDRA
X200406.30+334117.1 20 04 06.31 +33 41 17.16 4.63 CHANDRA
30 X200411.49+334240.6 20 04 11.50 +33 42 40.68 4.84 CHANDRA
CXOGSG J200411.4+334241 20 04 11.40 +33 42 41.76 4.87 CHANDRA
31 CXOGSG J200432.7+333402 20 04 32.81 +33 34 02.28 4.96 CHANDRA
32 X200416.04+334319.6 20 04 16.39 +33 43 19.56 4.97 CHANDRA
33 CXOGSG J200429.0+334359 20 04 29.81 +33 43 59.16 5.36 CHANDRA
X200429.07+334359.3 20 04 29.71 +33 43 59.16 5.36 CHANDRA
CXO J200429.0+334359 20 04 29.81 +33 43 59.88 5.37 CHANDRA
34 CXO J200406.5+334232 20 04 06.55 +33 42 32.04 5.39 CHANDRA
X200406.49+334232.5 20 04 06.48 +33 42 32.40 5.40 CHANDRA
CXOGSG J200406.4+334232 20 04 06.48 +33 42 32.40 5.40 CHANDRA
35 CXOGSG J200441.7+334258 20 04 41.74 +33 42 59.04 5.54 CHANDRA
CXO J200441.7+334259 20 04 41.78 +33 42 59.04 5.55 CHANDRA
X200441.95+334257.8 20 04 41.95 +33 42 57.96 5.56 CHANDRA
X200442.48+334313.3 20 04 42.48 +33 43 13.44 5.83 CHANDRA
36 CXOGSG J200433.3+334416 20 04 33.31 +33 44 16.08 5.84 CHANDRA
CXO J200433.3+334416 20 04 33.31 +33 44 16.44 5.84 CHANDRA
X200433.33+334416.4 20 04 33.34 +33 44 16.44 5.84 CHANDRA
37 CXOGSG J200430.1+334430 20 04 30.12 +33 44 30.48 5.91 CHANDRA
X200430.09+334431.1 20 04 30.91 +33 44 31.20 5.92 CHANDRA
38 X200408.89+334407.5 20 04 08.88 +33 44 07.44 6.35 CHANDRA
39 CXO J200441.0+334416 20 04 41.30 +33 44 16.08 6.51 CHANDRA
X200441.05+334417.8 20 04 41.50 +33 44 17.88 6.54 CHANDRA
40 CXOGSG J200423.0+333133 20 04 23.21 +33 31 33.60 7.16 CHANDRA
41 CXO J200413.5+334536 20 04 13.54 +33 45 36.00 7.28 CHANDRA
42 CXO J200417.7+334602 20 04 17.71 +33 46 02.64 7.48 CHANDRA
43 CXO J200403.5+333148 20 04 03.53 +33 31 48.00 8.20 CHANDRA
44 CXO J200428.3+333032 20 04 28.32 +33 30 32.04 8.21 CHANDRA
45 CXO J200347.6+333504 20 03 47.64 +33 35 04.56 8.54 CHANDRA
X200347.62+333504.7 20 03 47.62 +33 35 04.56 8.54 CHANDRA
46 CXO J200431.1+334712 20 04 31.15 +33 47 12.48 8.60 CHANDRA
47 CXO J200405.5+334626 20 04 05.59 +33 46 26.40 8.70 CHANDRA
48 X200345.51+333419.0 20 03 45.50 +33 34 18.84 9.28 CHANDRA
49 CXO J200421.4+332900 20 04 21.48 +33 29 00.24 9.73 CHANDRA
CXOGSG J200421.4+332859 20 04 21.43 +33 28 59.88 9.73 CHANDRA
X200421.19+332859.3 20 04 21.19 +33 28 59.16 9.75 CHANDRA
50 X200337.24+333824.1 20 03 37.25 +33 38 24.00 9.90 CHANDRA
CXO J200337.1+333823 20 03 37.15 +33 38 23.28 9.91 CHANDRA
51 CXO J200420.8+334908 20 04 20.88 +33 49 08.76 10.47 CHANDRA
52 CXO J200341.0+334405 20 03 41.81 +33 44 05.64 10.56 CHANDRA
X200341.03+334405.8 20 03 41.30 +33 44 05.64 10.58 CHANDRA
53 CXO J200410.1+335016 20 04 10.15 +33 50 16.08 11.95 CHANDRA
54 null 20 04 47.86 +33 50 22.56 12.62 EXOSAT
55 null 20 05 17.59 +33 46 44.40 13.52 EXOSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
GB6 J2004+3339 20 04 23.71 +33 39 03.96 0.42 GB6
WN 2002.4+3330 20 04 23.30 +33 39 02.16 0.45 WENSS
GC2002+33 20 04 22.99 +33 38 58.92 0.46 DIXON
1 MITG J2004+3338a 20 04 22.90 +33 38 26.88 0.47 MITGB6CM
B2 2002+33 20 04 22.90 +33 38 57.84 0.47 DIXON
CGPS J200423+333906 20 04 23.40 +33 39 06.12 0.49 CGPSNGPCAT
2 NVSS J200423+333906 20 04 23.40 +33 39 06.12 0.50 NVSS
WSRTGP 2002+3330 20 04 23.30 +33 39 06.84 0.51 WSRTGP
TXS 2002+335 20 04 23.40 +33 39 06.84 0.51 TEXAS
TGSSADR J200423.1+333905 20 04 23.21 +33 39 06.12 0.51 GMRTAS150M
2002+3330 20 04 22.99 +33 39 07.92 0.56 NORTH6CM
[SPT2015] VLA J2004+3339 20 04 23.21 +33 39 11.88 0.59 FER2FUSRID
3 MITG J2004+3338b 20 04 24.50 +33 38 03.12 0.66 MITGB6CM
4 ADG070.7+01.2 20 04 16.61 +33 41 21.84 3.15 DIXON
5 BG 2002+33 20 04 27.19 +33 35 34.08 3.18 DIXON
6 NVSS J200419+333427 20 04 19.20 +33 34 27.84 4.40 NVSS
7 NVSS J200411+334238 20 04 11.50 +33 42 38.16 4.81 NVSS
CGPS J200411+334240 20 04 11.50 +33 42 39.96 4.83 CGPSNGPCAT
8 NVSS J200433+333329 20 04 33.91 +33 33 29.16 5.55 NVSS
9 NVSS J200437+333206 20 04 37.01 +33 32 06.00 7.07 NVSS
10 NVSS J200431+333126 20 04 31.61 +33 31 26.04 7.41 NVSS
11 NVSS J200428+333024 20 04 28.10 +33 30 24.84 8.33 NVSS
12 NVSS J200409+334628 20 04 09.00 +33 46 28.92 8.44 NVSS
13 NVSS J200428+334747 20 04 28.01 +33 47 48.12 9.11 NVSS
14 CGPS J200416+332933 20 04 16.99 +33 29 34.08 9.29 CGPSNGPCAT
15 NVSS J200439+334809 20 04 39.00 +33 48 09.00 9.90 NVSS
16 CGPS J200335+334017 20 03 36.00 +33 40 17.04 10.27 CGPSNGPCAT
17 NVSS J200428+334900 20 04 28.01 +33 49 00.84 10.33 NVSS
18 CGPS J200407+334856 20 04 07.20 +33 48 56.16 10.86 CGPSNGPCAT
19 CGPS J200515+333103 20 05 15.41 +33 31 04.08 13.02 CGPSNGPCAT
20 CGPS J200327+334846 20 03 27.60 +33 48 47.16 15.58 CGPSNGPCAT

Penn State University Goddard Space Flight Center Swift