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 J1838.4-0545

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1838.4-0545 Swift-XRT detections in the field for 4FGL J1838.4-0545

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 38 42.53 -05 43 32.44 4.42 (4.0 ± 0.8) x 10-3 56 5.651 5.281
2 18 39 00.09 -05 42 33.77 4.72 (2.2 ± 0.6) x 10-3 36 3.680 3.729
3 18 39 07.69 -05 43 21.04 4.95 (1.8 ± 0.6) x 10-3 27 3.567 3.344

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 37 59.21 -05 47 12.15 5.70 (1.1 ± 0.4) x 10-3 16 2.819 2.629
2 18 38 38.53 -05 38 24.80 5.24 (1.1 ± 0.4) x 10-3 18 2.631 2.436

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1838.4-0545 Swift-XRT image with known radio, optical and UV sources for 4FGL J1838.4-0545

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 4XMM J183830.5-054637 18 38 30.58 -05 46 37.20 1.22 XMM-NEWTON
4XMMs J183830.5-054637 18 38 30.58 -05 46 37.56 1.22 XMM-NEWTON
2 4XMM J183825.9-054352 18 38 25.97 -05 43 52.32 1.91 XMM-NEWTON
4XMMs J183825.9-054352 18 38 25.92 -05 43 52.32 1.91 XMM-NEWTON
3 4XMMs J183836.4-054644 18 38 36.46 -05 46 44.40 2.52 XMM-NEWTON
4XMM J183824.6-054813 18 38 24.62 -05 48 13.68 2.55 XMM-NEWTON
4 4XMM J183823.9-054319 18 38 23.93 -05 43 19.92 2.55 XMM-NEWTON
4XMMs J183824.5-054813 18 38 24.58 -05 48 14.04 2.55 XMM-NEWTON
4XMMs J183823.9-054319 18 38 23.90 -05 43 19.56 2.56 XMM-NEWTON
5 2CXO J183824.8-054817 18 38 24.82 -05 48 17.64 2.60 CHANDRA
6 4XMMs J183836.1-054342 18 38 36.12 -05 43 42.24 3.04 XMM-NEWTON
4XMM J183836.0-054341 18 38 36.07 -05 43 41.52 3.04 XMM-NEWTON
7 4XMM J183830.4-054221 18 38 30.46 -05 42 21.96 3.49 XMM-NEWTON
4XMMs J183830.5-054221 18 38 30.55 -05 42 21.24 3.50 XMM-NEWTON
8 4XMM J183818.4-054241 18 38 18.43 -05 42 41.40 3.75 XMM-NEWTON
4XMMs J183818.4-054241 18 38 18.41 -05 42 41.04 3.76 XMM-NEWTON
9 4XMM J183820.9-054143 18 38 20.95 -05 41 43.08 4.32 XMM-NEWTON
10 4XMMs J183838.9-054235 18 38 39.00 -05 42 35.64 4.33 XMM-NEWTON
4XMM J183839.0-054235 18 38 39.02 -05 42 36.00 4.33 XMM-NEWTON
4XMMs J183842.2-054331 18 38 42.29 -05 43 31.08 4.39 XMM-NEWTON
4XMM J183842.3-054330 18 38 42.29 -05 43 30.36 4.39 XMM-NEWTON
4XMM J183842.3-054330 18 38 42.31 -05 43 31.08 4.39 XMM-NEWTON
11 X183842.35-054331.1 18 38 42.36 -05 43 31.08 4.40 CHANDRA
4XMMs J183821.1-054136 18 38 21.19 -05 41 36.24 4.41 XMM-NEWTON
4XMM J183840.3-054044 18 38 40.27 -05 40 44.40 5.99 XMM-NEWTON
12 2CXO J183840.3-054044 18 38 40.32 -05 40 44.04 6.00 CHANDRA
4XMM J183840.3-054044 18 38 40.39 -05 40 44.40 6.01 XMM-NEWTON
13 4XMMs J183849.4-054327 18 38 49.42 -05 43 27.12 6.01 XMM-NEWTON
4XMMs J183840.3-054044 18 38 40.39 -05 40 44.40 6.01 XMM-NEWTON
14 4XMMs J183851.5-054624 18 38 51.50 -05 46 24.96 6.10 XMM-NEWTON
4XMM J183851.5-054624 18 38 51.53 -05 46 24.24 6.10 XMM-NEWTON
4XMM J183851.5-054624 18 38 51.55 -05 46 25.32 6.11 XMM-NEWTON
15 4XMMs J183844.3-054122 18 38 44.35 -05 41 22.20 6.13 XMM-NEWTON
4XMM J183844.4-054122 18 38 44.40 -05 41 22.20 6.14 XMM-NEWTON
16 4XMM J183834.8-053952 18 38 34.90 -05 39 52.92 6.19 XMM-NEWTON
4XMMs J183834.8-053952 18 38 34.87 -05 39 52.56 6.19 XMM-NEWTON
17 4XMMs J183852.9-054418 18 38 52.94 -05 44 18.96 6.59 XMM-NEWTON
4XMM J183852.9-054419 18 38 52.97 -05 44 19.32 6.59 XMM-NEWTON
18 4XMMs J183856.7-054623 18 38 56.71 -05 46 23.88 7.39 XMM-NEWTON
19 4XMMs J183855.0-054821 18 38 55.01 -05 48 21.24 7.41 XMM-NEWTON
20 4XMM J183838.2-053823 18 38 38.28 -05 38 23.28 7.88 XMM-NEWTON
4XMMs J183838.3-053822 18 38 38.30 -05 38 22.92 7.88 XMM-NEWTON
21 4XMMs J183831.3-053747 18 38 31.37 -05 37 47.64 8.03 XMM-NEWTON
4XMM J183831.4-053747 18 38 31.49 -05 37 47.64 8.03 XMM-NEWTON
22 4XMMs J183848.3-053930 18 38 48.38 -05 39 29.88 8.19 XMM-NEWTON
4XMM J183848.3-053929 18 38 48.38 -05 39 29.88 8.19 XMM-NEWTON
23 X183858.72-054812.4 18 38 58.73 -05 48 12.24 8.23 CHANDRA
2CXO J183858.7-054813 18 38 58.75 -05 48 13.32 8.24 CHANDRA
CXOGSG J183858.7-054814 18 38 58.73 -05 48 14.76 8.25 CHANDRA
24 4XMMs J183823.2-053713 18 38 23.28 -05 37 13.80 8.58 XMM-NEWTON
4XMM J183823.3-053713 18 38 23.30 -05 37 13.08 8.59 XMM-NEWTON
25 4XMMs J183857.2-054130 18 38 57.26 -05 41 30.84 8.62 XMM-NEWTON
26 4XMMs J183851.7-053936 18 38 51.70 -05 39 36.36 8.67 XMM-NEWTON
4XMM J183851.6-053935 18 38 51.70 -05 39 35.64 8.68 XMM-NEWTON
27 4XMM J183840.2-053738 18 38 40.27 -05 37 38.64 8.75 XMM-NEWTON
28 CXOGSG J183901.9-054702 18 39 01.92 -05 47 02.76 8.75 CHANDRA
2CXO J183901.9-054702 18 39 01.92 -05 47 02.76 8.75 CHANDRA
4XMMs J183840.3-053738 18 38 40.32 -05 37 38.28 8.76 XMM-NEWTON
29 4XMMs J183843.2-053743 18 38 43.22 -05 37 42.96 8.98 XMM-NEWTON
4XMM J183843.2-053742 18 38 43.22 -05 37 42.96 8.99 XMM-NEWTON
30 4XMM J183903.0-054420 18 39 03.10 -05 44 20.76 9.06 XMM-NEWTON
4XMMs J183903.1-054421 18 39 03.14 -05 44 21.48 9.07 XMM-NEWTON
4XMMs J183903.8-054657 18 39 03.84 -05 46 57.36 9.21 XMM-NEWTON
31 4XMM J183903.9-054656 18 39 03.98 -05 46 56.28 9.25 XMM-NEWTON
32 2CXO J183903.4-054245 18 39 03.43 -05 42 45.36 9.52 CHANDRA
X183903.46-054245.3 18 39 03.46 -05 42 45.36 9.52 CHANDRA
CXOGSG J183903.4-054246 18 39 03.48 -05 42 46.08 9.53 CHANDRA
4XMM J183903.4-054242 18 39 03.41 -05 42 41.76 9.53 XMM-NEWTON
4XMMs J183903.4-054242 18 39 03.46 -05 42 42.12 9.54 XMM-NEWTON
4XMM J183903.4-054242 18 39 03.60 -05 42 43.56 9.56 XMM-NEWTON
33 2CXO J183904.7-054854 18 39 04.78 -05 48 54.00 9.88 CHANDRA
X183904.79-054853.9 18 39 04.80 -05 48 54.00 9.88 CHANDRA
CXOGSG J183904.8-054854 18 39 04.80 -05 48 54.36 9.89 CHANDRA
34 2CXO J183858.5-055156 18 38 58.51 -05 51 56.52 9.96 CHANDRA
35 4XMMs J183902.5-055025 18 39 02.52 -05 50 25.08 9.96 XMM-NEWTON
4XMMs J183858.6-055200 18 38 58.63 -05 52 00.12 10.02 XMM-NEWTON
36 2CXO J183853.1-055330 18 38 53.14 -05 53 30.48 10.10 CHANDRA
4XMM J183853.1-055330 18 38 53.14 -05 53 30.84 10.10 XMM-NEWTON
4XMMs J183853.1-055331 18 38 53.18 -05 53 31.56 10.12 XMM-NEWTON
X183853.23-055331.8 18 38 53.23 -05 53 31.92 10.13 CHANDRA
4XMM J183907.8-054330 18 39 07.80 -05 43 29.64 10.37 XMM-NEWTON
4XMMs J183907.8-054330 18 39 07.80 -05 43 30.00 10.37 XMM-NEWTON
37 2CXO J183907.8-054329 18 39 07.80 -05 43 29.64 10.37 CHANDRA
4XMM J183907.8-054330 18 39 07.82 -05 43 30.36 10.37 XMM-NEWTON
CXOGSG J183907.8-054329 18 39 07.82 -05 43 30.00 10.37 CHANDRA
X183907.83-054329.8 18 39 07.82 -05 43 29.64 10.38 CHANDRA
38 X183901.98-055147.4 18 39 01.99 -05 51 47.52 10.56 CHANDRA
2CXO J183901.9-055148 18 39 01.97 -05 51 48.24 10.57 CHANDRA
39 4XMM J183901.1-053921 18 39 01.08 -05 39 21.60 10.59 XMM-NEWTON
4XMMs J183901.1-053921 18 39 01.15 -05 39 21.24 10.61 XMM-NEWTON
4XMM J183901.1-053921 18 39 01.22 -05 39 20.88 10.63 XMM-NEWTON
40 2CXO J183910.2-054715 18 39 10.22 -05 47 16.08 10.83 CHANDRA
CXOGSG J183910.2-054716 18 39 10.25 -05 47 16.08 10.83 CHANDRA
4XMMs J183901.0-053857 18 39 01.08 -05 38 57.48 10.84 XMM-NEWTON
4XMM J183901.1-053858 18 39 01.15 -05 38 58.56 10.85 XMM-NEWTON
41 4XMM J183910.6-054444 18 39 10.63 -05 44 44.52 10.87 XMM-NEWTON
4XMMs J183910.6-054444 18 39 10.66 -05 44 44.88 10.87 XMM-NEWTON
42 CXOGSG J183908.7-054938 18 39 08.74 -05 49 38.64 11.06 CHANDRA
43 X183911.20-054807.3 18 39 11.21 -05 48 07.20 11.22 CHANDRA
44 4XMM J183854.6-053649 18 38 54.65 -05 36 49.32 11.26 XMM-NEWTON
45 4XMM J183840.6-053457 18 38 40.63 -05 34 57.72 11.30 XMM-NEWTON
46 CXOGSG J183908.8-055012 18 39 08.90 -05 50 12.48 11.30 CHANDRA
2CXO J183908.9-055012 18 39 08.93 -05 50 12.48 11.31 CHANDRA
4XMM J183856.1-053702 18 38 56.16 -05 37 02.28 11.32 XMM-NEWTON
4XMMs J183856.1-053702 18 38 56.18 -05 37 02.28 11.33 XMM-NEWTON
47 CXOGSG J183905.6-055149 18 39 05.66 -05 51 49.68 11.35 CHANDRA
48 CXOGSG J183907.9-055049 18 39 07.97 -05 50 49.92 11.36 CHANDRA
X183907.96-055049.9 18 39 07.97 -05 50 49.92 11.36 CHANDRA
2CXO J183907.9-055050 18 39 07.97 -05 50 50.28 11.36 CHANDRA
2CXO J183905.7-055150 18 39 05.69 -05 51 50.40 11.36 CHANDRA
X183905.72-055150.6 18 39 05.71 -05 51 50.76 11.37 CHANDRA
49 4XMM J183817.3-053433 18 38 17.40 -05 34 33.60 11.46 XMM-NEWTON
4XMMs J183817.3-053433 18 38 17.38 -05 34 32.88 11.46 XMM-NEWTON
4XMMs J183907.2-055124 18 39 07.25 -05 51 24.48 11.47 XMM-NEWTON
50 2CXO J183907.2-055123 18 39 07.30 -05 51 23.76 11.47 CHANDRA
4XMM J183907.2-055124 18 39 07.27 -05 51 24.48 11.47 XMM-NEWTON
X183907.29-055123.9 18 39 07.30 -05 51 23.76 11.47 CHANDRA
51 4XMMs J183812.7-053442 18 38 12.79 -05 34 42.60 11.61 XMM-NEWTON
4XMM J183812.7-053441 18 38 12.79 -05 34 41.16 11.63 XMM-NEWTON
52 4XMMs J183906.1-053914 18 39 06.19 -05 39 14.76 11.70 XMM-NEWTON
53 X183905.99-055239.5 18 39 06.00 -05 52 39.36 11.88 CHANDRA
CXOGSG J183906.0-055239 18 39 06.02 -05 52 39.36 11.88 CHANDRA
2CXO J183906.0-055239 18 39 06.00 -05 52 40.08 11.88 CHANDRA
54 CXOGSG J183909.6-055133 18 39 09.62 -05 51 33.48 12.06 CHANDRA
2CXO J183909.6-055133 18 39 09.65 -05 51 33.12 12.06 CHANDRA
55 4XMM J183856.4-053545 18 38 56.47 -05 35 45.96 12.38 XMM-NEWTON
4XMMs J183856.5-053546 18 38 56.57 -05 35 45.96 12.39 XMM-NEWTON
56 X183848.51-055657.5 18 38 48.50 -05 56 57.48 12.40 CHANDRA
57 4XMM J183913.6-054024 18 39 13.61 -05 40 24.60 12.74 XMM-NEWTON
58 2CXO J183913.9-055059 18 39 13.92 -05 50 60.00 12.77 CHANDRA
59 CXOGSG J183853.8-055644 18 38 53.81 -05 56 44.88 12.84 CHANDRA
X183853.74-055645.6 18 38 53.74 -05 56 45.60 12.84 CHANDRA
2CXO J183853.7-055646 18 38 53.76 -05 56 46.68 12.86 CHANDRA
60 X183904.45-055540.1 18 39 04.44 -05 55 40.08 13.58 CHANDRA
61 X183857.14-055719.1 18 38 57.14 -05 57 19.08 13.76 CHANDRA
62 2CXO J183756.9-055727 18 37 56.98 -05 57 27.00 13.89 CHANDRA
63 X183914.67-055507.7 18 39 14.66 -05 55 07.68 15.09 CHANDRA
X183914.75-055507.1 18 39 14.76 -05 55 06.96 15.10 CHANDRA
2CXO J183914.7-055508 18 39 14.71 -05 55 08.04 15.10 CHANDRA
X183914.72-055508.2 18 39 14.71 -05 55 08.04 15.10 CHANDRA
4XMM J183914.7-055508 18 39 14.74 -05 55 08.04 15.11 XMM-NEWTON
CXOGSG J183914.7-055508 18 39 14.71 -05 55 08.40 15.11 CHANDRA
4XMMs J183914.7-055508 18 39 14.71 -05 55 08.40 15.11 XMM-NEWTON
CXOGSG J183914.7-055507 18 39 14.78 -05 55 07.68 15.11 CHANDRA
64 4XMM J183908.4-053435 18 39 08.35 -05 34 36.48 15.15 XMM-NEWTON
4XMMs J183908.4-053435 18 39 08.45 -05 34 35.40 15.18 XMM-NEWTON
4XMM J183908.4-053435 18 39 08.50 -05 34 34.68 15.20 XMM-NEWTON
65 4XMMs J183915.3-053534 18 39 15.36 -05 35 34.08 15.75 XMM-NEWTON

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J183818-054550 18 38 18.19 -05 45 50.04 2.22 NVSS
2 NVSS J183825-054320 18 38 25.70 -05 43 19.92 2.44 NVSS
MAGPIS Discrete G26.28179+0.23 18 38 26.40 -05 48 34.92 2.84 MAGPIS
[WBH2005] G26.282+0.231 18 38 26.40 -05 48 36.00 2.85 WBHGP6CM
3 NVSS J183826-054837 18 38 26.59 -05 48 38.16 2.88 NVSS
4 NVSS J183820-054309 18 38 20.81 -05 43 09.84 3.04 NVSS
5 MAGPIS Diffuse G26.2611+0.2819 18 38 15.10 -05 48 29.16 4.06 MAGPIS
6 NVSS J183813-054817 18 38 13.01 -05 48 18.00 4.33 NVSS
7 PSR J1838-0549 18 38 38.11 -05 49 12.00 4.39 ATNFPULSAR
8 MAGPIS Discrete G26.35726+0.18 18 38 45.29 -05 45 56.16 4.54 MAGPIS
9 PPM 201986 18 38 38.50 -05 50 05.28 5.17 PPM
10 NVSS J183847-054337 18 38 48.00 -05 43 36.84 5.61 NVSS
11 NVSS J183842-055116 18 38 42.41 -05 51 16.92 6.71 NVSS
12 NVSS J183831-055230 18 38 31.80 -05 52 30.00 6.84 NVSS
13 NVSS J183855-054645 18 38 55.20 -05 46 45.12 7.05 NVSS
14 NVSS J183850-055014 18 38 50.59 -05 50 13.92 7.36 NVSS
15 NVSS J183901-054755 18 39 01.10 -05 47 54.96 8.72 NVSS
16 MAGPIS Discrete G26.47515+0.21 18 38 50.50 -05 38 38.04 9.20 MAGPIS
17 NVSS J183809-055400 18 38 09.00 -05 54 01.08 9.40 NVSS
18 SAO 142467 18 39 03.43 -05 42 44.64 9.52 SAO
PPM 201993 18 39 03.50 -05 42 44.64 9.54 PPM
BD-05 4714 18 39 03.50 -05 42 44.64 9.54 ACRS
19 NVSS J183902-054932 18 39 02.50 -05 49 32.88 9.59 NVSS
[WBH2005] G26.317+0.410 18 37 52.01 -05 41 48.84 9.59 WBHGP6CM
TGSSADR J183752.0-054144 18 37 52.10 -05 41 44.16 9.59 GMRTAS150M
[WBH2005] G26.317+0.410 18 37 52.01 -05 41 48.84 9.60 WBHGP20CM
MAGPIS Discrete G26.31690+0.40 18 37 52.01 -05 41 48.12 9.60 MAGPIS
20 NVSS J183751-054141 18 37 51.91 -05 41 42.00 9.66 NVSS
TXS 1835-057 18 37 51.70 -05 41 45.96 9.67 TEXAS
[WBH2005] G26.318+0.412 18 37 51.70 -05 41 39.84 9.72 WBHGP6CM
[WBH2005] G26.318+0.412 18 37 51.70 -05 41 39.84 9.72 WBHGP20CM
MAGPIS Discrete G26.31856+0.41 18 37 51.70 -05 41 39.12 9.73 MAGPIS
21 GPA 026.16+0.27 18 38 04.90 -05 53 47.04 9.75 GPA
22 MAGPIS Discrete G26.48231+0.29 18 38 35.50 -05 36 12.96 9.76 MAGPIS
23 NVSS J183847-053726 18 38 47.69 -05 37 26.04 9.77 NVSS
24 MAGPIS Discrete G26.48045+0.30 18 38 33.31 -05 36 03.96 9.82 MAGPIS
25 MAGPIS Discrete G26.15395+0.32 18 37 52.90 -05 52 54.84 11.13 MAGPIS
PSR J1838-0537 18 38 55.99 -05 37 09.12 11.21 ATNFPULSAR
26 NVSS J183912-054621 18 39 12.31 -05 46 21.00 11.25 NVSS
27 NVSS J183854-053652 18 38 54.91 -05 36 52.92 11.26 NVSS
28 NVSS J183801-055509 18 38 01.20 -05 55 09.12 11.39 NVSS
29 MAGPIS Discrete G26.43014+0.08 18 39 13.20 -05 44 35.16 11.52 MAGPIS
PPM 707173 18 38 36.26 -05 57 03.60 11.53 PPM
30 PGCC G26.17+0.13 18 38 34.80 -05 57 20.88 11.74 PLANCKGCC
31 MAGPIS Discrete G26.44444+0.40 18 38 06.50 -05 35 03.12 11.88 MAGPIS
32 NVSS J183739-054220 18 37 39.19 -05 42 20.16 12.40 NVSS
33 MAGPIS Discrete G26.12670+0.32 18 37 48.31 -05 54 10.08 12.81 MAGPIS
34 MAGPIS Discrete G26.38486+0.46 18 37 48.31 -05 36 43.92 13.21 MAGPIS
35 NVSS J183904-053615 18 39 04.20 -05 36 15.84 13.23 NVSS
MAGPIS Diffuse G26.5333+0.1833 18 39 04.39 -05 36 16.92 13.25 MAGPIS
36 [WBH2005] G26.122+0.345 18 37 44.30 -05 54 00.00 13.47 WBHGP6CM
MAGPIS Discrete G26.12153+0.34 18 37 44.30 -05 54 00.00 13.47 MAGPIS
37 [WBH2005] G26.130+0.368 18 37 40.39 -05 52 54.12 13.65 WBHGP6CM
MAGPIS Discrete G26.13024+0.36 18 37 40.30 -05 52 54.12 13.66 MAGPIS
38 MAGPIS Discrete G26.11424+0.35 18 37 40.70 -05 54 02.88 14.20 MAGPIS
39 NVSS J183907-053356 18 39 07.10 -05 33 56.16 15.46 NVSS

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