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 J2004.3+3339

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J2004.3+3339 Swift-XRT detections in the field for 4FGL J2004.3+3339


No detected excesses found.

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 20 05 40.59 +33 33 27.40 6.93 (2.6 ± 0.9) x 10-3 12 3.066 2.968

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J2004.3+3339 Swift-XRT image with known radio, optical and UV sources for 4FGL J2004.3+3339

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 X200423.43+333906.8 20 04 23.42 +33 39 06.84 0.23 CHANDRA
CXOGSG J200423.4+333906 20 04 23.42 +33 39 06.84 0.23 CHANDRA
2CXO J200423.4+333906 20 04 23.42 +33 39 06.48 0.23 CHANDRA
X200422.19+333856.1 20 04 22.20 +33 38 56.04 0.43 CHANDRA
CXOGSG J200422.1+333855 20 04 22.10 +33 38 55.68 0.44 CHANDRA
X200422.20+333853.1 20 04 22.20 +33 38 53.16 0.47 CHANDRA
2 2CXO J200421.3+333942 20 04 21.34 +33 39 42.48 0.53 CHANDRA
2CXO J200422.7+333844 20 04 22.78 +33 38 44.16 0.59 CHANDRA
2CXO J200422.9+333843 20 04 22.94 +33 38 43.80 0.59 CHANDRA
X200422.84+333843.6 20 04 22.85 +33 38 43.44 0.60 CHANDRA
CXOGSG J200422.8+333843 20 04 22.87 +33 38 43.44 0.60 CHANDRA
3 2CXO J200424.0+334008 20 04 24.00 +33 40 08.40 0.84 CHANDRA
CXOGSG J200424.0+334008 20 04 24.00 +33 40 08.40 0.84 CHANDRA
X200424.02+334008.8 20 04 24.02 +33 40 08.76 0.85 CHANDRA
4 CXOGSG J200418.5+333852 20 04 18.58 +33 38 52.08 1.04 CHANDRA
X200418.53+333852.0 20 04 18.53 +33 38 52.08 1.05 CHANDRA
5 2CXO J200427.9+333857 20 04 27.91 +33 38 57.48 1.08 CHANDRA
6 2CXO J200420.9+334020 20 04 20.95 +33 40 20.28 1.10 CHANDRA
CXOGSG J200420.9+334020 20 04 20.95 +33 40 20.28 1.10 CHANDRA
X200420.97+334020.5 20 04 20.98 +33 40 20.64 1.11 CHANDRA
7 CXOGSG J200416.8+333942 20 04 16.90 +33 39 42.48 1.34 CHANDRA
X200416.89+333942.6 20 04 16.90 +33 39 42.48 1.34 CHANDRA
2CXO J200416.8+333942 20 04 16.87 +33 39 42.48 1.34 CHANDRA
8 CXOGSG J200424.4+333759 20 04 24.43 +33 37 59.52 1.36 CHANDRA
X200424.44+333759.4 20 04 24.43 +33 37 59.52 1.37 CHANDRA
2CXO J200424.4+333759 20 04 24.43 +33 37 59.16 1.37 CHANDRA
X200423.68+333749.6 20 04 23.69 +33 37 49.44 1.50 CHANDRA
2CXO J200423.6+333749 20 04 23.69 +33 37 49.44 1.51 CHANDRA
CXOGSG J200423.6+333749 20 04 23.69 +33 37 49.08 1.51 CHANDRA
X200426.10+333752.0 20 04 26.11 +33 37 51.96 1.59 CHANDRA
CXOGSG J200426.1+333751 20 04 26.11 +33 37 51.96 1.59 CHANDRA
2CXO J200426.1+333751 20 04 26.11 +33 37 51.96 1.59 CHANDRA
9 X200426.57+334046.8 20 04 26.57 +33 40 46.92 1.63 CHANDRA
2CXO J200426.5+334046 20 04 26.54 +33 40 46.92 1.63 CHANDRA
CXOGSG J200426.5+334046 20 04 26.57 +33 40 46.92 1.63 CHANDRA
2CXO J200415.8+333959 20 04 15.86 +33 39 59.76 1.64 CHANDRA
10 X200422.12+333737.1 20 04 22.13 +33 37 37.20 1.72 CHANDRA
CXOGSG J200422.1+333737 20 04 22.13 +33 37 36.84 1.72 CHANDRA
2CXO J200422.1+333737 20 04 22.13 +33 37 36.84 1.72 CHANDRA
11 CXOGSG J200430.4+334010 20 04 30.48 +33 40 10.56 1.77 CHANDRA
X200430.47+334010.7 20 04 30.48 +33 40 10.56 1.77 CHANDRA
2CXO J200430.4+334010 20 04 30.48 +33 40 10.56 1.77 CHANDRA
12 CXOGSG J200429.1+334057 20 04 29.14 +33 40 57.36 2.07 CHANDRA
2CXO J200429.1+334057 20 04 29.14 +33 40 57.72 2.07 CHANDRA
X200429.15+334057.9 20 04 29.16 +33 40 58.08 2.08 CHANDRA
13 2CXO J200426.6+334118 20 04 26.64 +33 41 18.96 2.13 CHANDRA
CXOGSG J200426.6+334118 20 04 26.64 +33 41 18.96 2.13 CHANDRA
X200426.65+334119.1 20 04 26.64 +33 41 18.96 2.13 CHANDRA
CXOGSG J200430.2+334105 20 04 30.22 +33 41 05.64 2.32 CHANDRA
X200430.22+334105.9 20 04 30.22 +33 41 06.00 2.32 CHANDRA
2CXO J200430.2+334105 20 04 30.24 +33 41 05.64 2.32 CHANDRA
14 X200418.41+333712.6 20 04 18.41 +33 37 12.72 2.32 CHANDRA
CXOGSG J200418.4+333712 20 04 18.41 +33 37 12.72 2.32 CHANDRA
2CXO J200418.3+333712 20 04 18.41 +33 37 12.72 2.32 CHANDRA
15 X200411.94+333948.6 20 04 11.95 +33 39 48.60 2.36 CHANDRA
CXOGSG J200411.9+333948 20 04 11.93 +33 39 48.24 2.36 CHANDRA
2CXO J200411.9+333948 20 04 11.90 +33 39 48.60 2.37 CHANDRA
16 2CXO J200411.2+333905 20 04 11.28 +33 39 05.76 2.46 CHANDRA
X200411.30+333905.6 20 04 11.30 +33 39 05.76 2.46 CHANDRA
CXOGSG J200411.2+333905 20 04 11.26 +33 39 05.76 2.46 CHANDRA
17 X200434.47+333839.2 20 04 34.46 +33 38 39.12 2.47 CHANDRA
CXOGSG J200434.4+333839 20 04 34.46 +33 38 39.12 2.47 CHANDRA
2CXO J200434.4+333838 20 04 34.49 +33 38 38.76 2.48 CHANDRA
18 X200416.01+333710.6 20 04 16.01 +33 37 10.56 2.60 CHANDRA
CXOGSG J200416.0+333710 20 04 16.01 +33 37 10.56 2.60 CHANDRA
2CXO J200415.9+333710 20 04 15.98 +33 37 10.56 2.60 CHANDRA
CXOGSG J200410.6+333958 20 04 10.61 +33 39 58.68 2.67 CHANDRA
2CXO J200410.6+333959 20 04 10.61 +33 39 59.04 2.67 CHANDRA
X200410.59+333959.0 20 04 10.58 +33 39 59.04 2.67 CHANDRA
19 CXOGSG J200431.7+333719 20 04 31.75 +33 37 19.56 2.70 CHANDRA
X200431.74+333719.2 20 04 31.75 +33 37 19.20 2.70 CHANDRA
2CXO J200431.7+333719 20 04 31.75 +33 37 18.84 2.70 CHANDRA
X200410.07+333903.9 20 04 10.08 +33 39 03.96 2.71 CHANDRA
CXOGSG J200410.0+333904 20 04 10.06 +33 39 03.96 2.72 CHANDRA
2CXO J200410.0+333903 20 04 10.06 +33 39 03.96 2.72 CHANDRA
20 X200412.90+333717.8 20 04 12.91 +33 37 17.76 2.93 CHANDRA
CXOGSG J200412.8+333717 20 04 12.89 +33 37 17.76 2.93 CHANDRA
2CXO J200412.8+333717 20 04 12.89 +33 37 17.76 2.93 CHANDRA
21 X200437.01+333842.4 20 04 37.01 +33 38 42.36 2.97 CHANDRA
2CXO J200437.0+333842 20 04 37.03 +33 38 42.36 2.97 CHANDRA
22 2CXO J200428.2+334209 20 04 28.25 +33 42 09.72 3.04 CHANDRA
CXOGSG J200427.1+334218 20 04 27.19 +33 42 18.36 3.10 CHANDRA
X200427.22+334218.4 20 04 27.22 +33 42 18.36 3.11 CHANDRA
2CXO J200427.2+334218 20 04 27.22 +33 42 18.36 3.11 CHANDRA
23 2CXO J200437.1+333754 20 04 37.10 +33 37 54.48 3.25 CHANDRA
24 CXOGSG J200412.6+333633 20 04 12.67 +33 36 33.48 3.51 CHANDRA
2CXO J200412.6+333632 20 04 12.60 +33 36 32.76 3.52 CHANDRA
X200412.60+333633.0 20 04 12.60 +33 36 33.12 3.52 CHANDRA
25 CXOGSG J200406.2+333839 20 04 06.24 +33 38 39.48 3.56 CHANDRA
26 2CXO J200440.3+333948 20 04 40.32 +33 39 48.60 3.63 CHANDRA
27 CXOGSG J200432.4+334223 20 04 32.45 +33 42 23.04 3.63 CHANDRA
X200432.51+334222.9 20 04 32.52 +33 42 23.04 3.64 CHANDRA
2CXO J200432.5+334223 20 04 32.50 +33 42 23.04 3.64 CHANDRA
2CXO J200439.9+334017 20 04 39.96 +33 40 17.04 3.65 CHANDRA
X200439.98+334017.7 20 04 39.98 +33 40 17.76 3.66 CHANDRA
28 CXOGSG J200408.8+333651 20 04 08.88 +33 36 51.84 3.84 CHANDRA
29 X200420.20+333528.6 20 04 20.21 +33 35 28.68 3.89 CHANDRA
CXOGSG J200420.1+333528 20 04 20.18 +33 35 28.32 3.90 CHANDRA
2CXO J200420.1+333528 20 04 20.18 +33 35 28.32 3.90 CHANDRA
30 2CXO J200406.3+334116 20 04 06.31 +33 41 16.80 3.99 CHANDRA
CXOGSG J200406.2+334116 20 04 06.29 +33 41 16.80 4.00 CHANDRA
X200406.30+334117.1 20 04 06.31 +33 41 17.16 4.00 CHANDRA
31 2CXO J200412.4+333554 20 04 12.41 +33 35 54.60 4.07 CHANDRA
32 X200411.49+334240.6 20 04 11.50 +33 42 40.68 4.13 CHANDRA
CXOGSG J200411.6+333556 20 04 11.64 +33 35 56.40 4.13 CHANDRA
2CXO J200411.4+334241 20 04 11.42 +33 42 41.04 4.14 CHANDRA
CXOGSG J200411.4+334241 20 04 11.40 +33 42 41.76 4.15 CHANDRA
33 2CXO J200416.0+334319 20 04 16.01 +33 43 19.20 4.25 CHANDRA
X200416.04+334319.6 20 04 16.03 +33 43 19.56 4.26 CHANDRA
34 2CXO J200441.4+334132 20 04 41.47 +33 41 32.64 4.43 CHANDRA
X200441.52+334132.0 20 04 41.52 +33 41 31.92 4.43 CHANDRA
CXOGSG J200441.5+334133 20 04 41.52 +33 41 33.36 4.45 CHANDRA
35 2CXO J200425.8+334353 20 04 25.87 +33 43 53.04 4.60 CHANDRA
36 X200406.49+334232.5 20 04 06.48 +33 42 32.40 4.71 CHANDRA
2CXO J200406.4+334232 20 04 06.48 +33 42 32.76 4.71 CHANDRA
CXOGSG J200406.4+334232 20 04 06.48 +33 42 32.40 4.72 CHANDRA
37 X200429.07+334359.3 20 04 29.06 +33 43 59.16 4.83 CHANDRA
CXOGSG J200429.0+334359 20 04 29.09 +33 43 59.16 4.83 CHANDRA
2CXO J200429.0+334359 20 04 29.06 +33 43 59.52 4.83 CHANDRA
38 2CXO J200423.0+333421 20 04 22.99 +33 34 21.00 4.97 CHANDRA
39 2CXO J200413.4+333443 20 04 13.42 +33 34 43.68 5.02 CHANDRA
40 CXOGSG J200441.7+334258 20 04 41.74 +33 42 59.04 5.34 CHANDRA
2CXO J200441.8+334258 20 04 41.83 +33 42 58.68 5.35 CHANDRA
X200441.95+334257.8 20 04 41.95 +33 42 57.96 5.36 CHANDRA
41 CXOGSG J200433.3+334416 20 04 33.31 +33 44 16.08 5.39 CHANDRA
42 CXOGSG J200430.1+334430 20 04 30.12 +33 44 30.48 5.39 CHANDRA
X200433.33+334416.4 20 04 33.34 +33 44 16.44 5.39 CHANDRA
X200430.09+334431.1 20 04 30.10 +33 44 31.20 5.40 CHANDRA
2CXO J200433.3+334416 20 04 33.31 +33 44 16.80 5.40 CHANDRA
2CXO J200429.9+334432 20 04 29.95 +33 44 32.28 5.41 CHANDRA
2CXO J200442.3+334315 20 04 42.34 +33 43 15.24 5.62 CHANDRA
X200442.48+334313.3 20 04 42.48 +33 43 13.44 5.62 CHANDRA
43 2CXO J200408.8+334406 20 04 08.88 +33 44 07.08 5.62 CHANDRA
X200408.89+334407.5 20 04 08.88 +33 44 07.44 5.63 CHANDRA
44 2CXO J200432.7+333402 20 04 32.78 +33 34 02.64 5.66 CHANDRA
CXOGSG J200432.7+333402 20 04 32.81 +33 34 02.28 5.67 CHANDRA
45 2CXO J200417.1+333324 20 04 17.16 +33 33 24.12 6.04 CHANDRA
46 2CXO J200441.0+334417 20 04 41.09 +33 44 17.16 6.22 CHANDRA
47 2CXO J200440.5+333416 20 04 40.51 +33 34 16.32 6.22 CHANDRA
X200441.05+334417.8 20 04 41.04 +33 44 17.88 6.23 CHANDRA
48 2CXO J200419.8+334603 20 04 19.82 +33 46 03.36 6.76 CHANDRA
2CXO J200417.6+334601 20 04 17.62 +33 46 01.92 6.80 CHANDRA
49 2CXO J200404.2+333324 20 04 04.27 +33 33 24.48 7.09 CHANDRA
50 2CXO J200408.4+333219 20 04 08.42 +33 32 18.96 7.64 CHANDRA
51 2CXO J200422.8+333134 20 04 22.85 +33 31 34.32 7.75 CHANDRA
CXOGSG J200423.0+333133 20 04 23.02 +33 31 33.60 7.77 CHANDRA
52 2CXO J200347.9+334204 20 03 47.93 +33 42 04.68 7.81 CHANDRA
53 2CXO J200405.5+334626 20 04 05.54 +33 46 26.04 7.99 CHANDRA
54 2CXO J200431.1+334712 20 04 31.18 +33 47 12.12 8.06 CHANDRA
55 X200347.62+333504.7 20 03 47.62 +33 35 04.56 8.51 CHANDRA
56 2CXO J200403.4+333149 20 04 03.41 +33 31 50.16 8.53 CHANDRA
2CXO J200347.4+333503 20 03 47.47 +33 35 03.84 8.55 CHANDRA
57 2CXO J200428.5+333032 20 04 28.54 +33 30 32.76 8.85 CHANDRA
58 X200345.51+333419.0 20 03 45.50 +33 34 18.84 9.28 CHANDRA
59 X200337.24+333824.1 20 03 37.25 +33 38 24.00 9.58 CHANDRA
2CXO J200337.0+333824 20 03 37.08 +33 38 24.00 9.61 CHANDRA
60 2CXO J200420.7+334909 20 04 20.76 +33 49 09.84 9.85 CHANDRA
61 X200341.03+334405.8 20 03 41.04 +33 44 05.64 9.96 CHANDRA
2CXO J200340.9+334404 20 03 40.97 +33 44 04.56 9.96 CHANDRA
62 2CXO J200336.8+334229 20 03 36.89 +33 42 29.88 10.11 CHANDRA
63 2CXO J200421.3+332900 20 04 21.31 +33 29 00.60 10.32 CHANDRA
CXOGSG J200421.4+332859 20 04 21.43 +33 28 59.88 10.33 CHANDRA
X200421.19+332859.3 20 04 21.19 +33 28 59.16 10.34 CHANDRA
64 2CXO J200440.1+334945 20 04 40.20 +33 49 45.84 11.03 CHANDRA
65 2CXO J200409.8+335014 20 04 09.86 +33 50 14.64 11.26 CHANDRA
66 2CXO J200439.5+335036 20 04 39.60 +33 50 36.24 11.79 CHANDRA
67 2CXO J200442.2+335046 20 04 42.29 +33 50 46.68 12.13 CHANDRA
68 Unknown 20 04 47.86 +33 50 22.56 12.20 EXOSAT
69 Unknown 20 05 17.06 +33 46 44.40 13.46 EXOSAT
70 Unknown 20 03 26.86 +33 32 39.48 13.47 EXOSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
[SPT2015] VLA J2004+3339 20 04 23.21 +33 39 11.88 0.13 FER2FUSRID
2002+3330 20 04 22.99 +33 39 07.92 0.19 NORTH6CM
TXS 2002+335 20 04 23.40 +33 39 06.84 0.21 TEXAS
WSRTGP 2002+3330 20 04 23.30 +33 39 06.84 0.22 WSRTGP
1 NVSS J200423+333906 20 04 23.40 +33 39 06.12 0.23 NVSS
TGSSADR J200423.1+333905 20 04 23.21 +33 39 06.12 0.23 GMRTAS150M
CGPS J200423+333906 20 04 23.40 +33 39 06.12 0.24 CGPSNGPCAT
WN 2002.4+3330 20 04 23.30 +33 39 02.16 0.29 WENSS
GB6 J2004+3339 20 04 23.71 +33 39 03.96 0.29 GB6
GC2002+33 20 04 22.99 +33 38 58.92 0.34 DIXON
B2 2002+33 20 04 22.90 +33 38 57.84 0.36 DIXON
2 MITG J2004+3338a 20 04 22.90 +33 38 26.88 0.87 MITGB6CM
3 MITG J2004+3338b 20 04 24.50 +33 38 03.12 1.31 MITGB6CM
4 ADG070.7+01.2 20 04 16.61 +33 41 21.84 2.43 DIXON
5 HD 227465 20 04 27.22 +33 42 18.36 3.11 OSTARS
6 BG 2002+33 20 04 27.19 +33 35 34.08 3.85 DIXON
7 NVSS J200411+334238 20 04 11.50 +33 42 38.16 4.09 NVSS
CGPS J200411+334240 20 04 11.50 +33 42 39.96 4.12 CGPSNGPCAT
8 NVSS J200419+333427 20 04 19.20 +33 34 27.84 4.93 NVSS
9 HD 331716 20 04 35.45 +33 44 59.28 6.22 HDEC
10 NVSS J200433+333329 20 04 33.91 +33 33 29.16 6.26 NVSS
11 BD+33 3716 20 04 23.62 +33 33 02.16 6.29 ACRS
HD 190571 20 04 23.59 +33 33 02.16 6.29 HIC
PPM 84137 20 04 23.57 +33 33 02.16 6.29 PPM
HIP 98845 20 04 23.54 +33 33 02.16 6.29 HIPPARCOS
SAO 69353 20 04 23.54 +33 33 01.44 6.30 SAO
12 NVSS J200409+334628 20 04 09.00 +33 46 28.92 7.73 NVSS
13 NVSS J200437+333206 20 04 37.01 +33 32 06.00 7.78 NVSS
14 NVSS J200431+333126 20 04 31.61 +33 31 26.04 8.09 NVSS
15 WDS J20049+3334 BC 20 04 54.00 +33 34 00.12 8.36 WDS
WDS J20049+3334 AB 20 04 54.00 +33 34 00.12 8.36 WDS
16 NVSS J200428+334747 20 04 28.01 +33 47 48.12 8.53 NVSS
17 NVSS J200428+333024 20 04 28.10 +33 30 24.84 8.98 NVSS
18 NVSS J200439+334809 20 04 39.00 +33 48 09.00 9.43 NVSS
19 NVSS J200428+334900 20 04 28.01 +33 49 00.84 9.74 NVSS
20 CGPS J200335+334017 20 03 36.00 +33 40 17.04 9.84 CGPSNGPCAT
21 CGPS J200416+332933 20 04 16.99 +33 29 34.08 9.85 CGPSNGPCAT
22 CGPS J200407+334856 20 04 07.20 +33 48 56.16 10.16 CGPSNGPCAT
23 BD+33 3722 20 04 36.55 +33 49 31.44 10.58 ACRS
PPM 84149 20 04 36.58 +33 49 31.44 10.58 PPM
24 WDS J20039+3349 20 03 54.00 +33 49 00.12 11.41 WDS
25 WDS J20039+3329 20 03 54.00 +33 28 59.88 11.97 WDS
26 MITG J2003+3340 20 03 25.70 +33 40 21.00 11.98 MITGB6CM
27 WDS J20053+3343 20 05 18.00 +33 43 00.12 12.01 WDS
CGPS J200325+334110 20 03 25.61 +33 41 11.04 12.10 CGPSNGPCAT
28 NVSS J200325+334110 20 03 25.61 +33 41 09.96 12.10 NVSS
WN 2001.5+3332 20 03 25.61 +33 41 12.84 12.10 WENSS
WSRTGP 2001+3332 20 03 25.51 +33 41 12.84 12.13 WSRTGP
29 PPM 84098 20 03 27.29 +33 32 35.88 13.42 PPM
BD+33 3709 20 03 27.26 +33 32 35.88 13.42 ACRS
SAO 69319 20 03 27.24 +33 32 36.24 13.42 SAO
30 CGPS J200515+333103 20 05 15.41 +33 31 04.08 13.68 CGPSNGPCAT
31 CGPS J200327+334846 20 03 27.60 +33 48 47.16 14.91 CGPSNGPCAT
32 V1471 Cyg 20 05 17.93 +33 28 34.32 15.70 GCVS

Penn State University Goddard Space Flight Center Swift