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 J0540.0-7552

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J0540.0-7552 Swift-XRT detections in the field for 4FGL J0540.0-7552

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 05 41 36.64 -76 04 22.69 3.92 (4.0 ± 0.3) x 10-2 173 13.290 12.350
2 05 40 27.01 -75 53 54.20 5.96 (4.7 ± 1.2) x 10-3 20 3.862 3.954

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 05 39 25.13 -76 06 42.67 6.31 (1.9 ± 0.8) x 10-3 12 2.375 2.412
2 05 39 54.79 -75 54 32.09 5.89 (2.0 ± 0.8) x 10-3 23 2.338 2.336

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J0540.0-7552 Swift-XRT image with known radio, optical and UV sources for 4FGL J0540.0-7552

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 XMMSL2 J054137.7-760418 05 41 36.65 -76 04 16.68 12.94 XMM-NEWTON
XMMSL2 J054137.7-760418 05 41 36.48 -76 04 19.20 12.98 XMM-NEWTON
XMMSL2 J054137.7-760418 05 41 37.90 -76 04 17.40 12.99 XMM-NEWTON
XMMSL2 J054137.7-760418 05 41 37.73 -76 04 18.12 12.99 XMM-NEWTON
XMMSL2 J054137.7-760418 05 41 37.73 -76 04 18.12 12.99 XMM-NEWTON
XMMSL2 J054137.7-760418 05 41 36.77 -76 04 20.64 13.00 XMM-NEWTON
HD 39150 05 41 36.38 -76 04 24.60 13.05 ROSAT
HD 39150 05 41 34.99 -76 04 30.00 13.10 ROSAT
1RXS J054135.6-760434 05 41 35.59 -76 04 33.96 13.17 ROSAT
2RXS J054135.5-760434 05 41 35.52 -76 04 34.68 13.18 ROSAT
2RXS J054135.5-760434 05 41 35.52 -76 04 34.68 13.18 ROSAT
1RXS J054135.6-760434 05 41 35.59 -76 04 34.68 13.18 ROSAT
2 XMMSL2 J054317.6-760215 05 43 17.64 -76 02 15.36 15.26 XMM-NEWTON
XMMSL2 J054317.6-760215 05 43 17.64 -76 02 15.36 15.26 XMM-NEWTON
2RXS J054317.3-760220 05 43 17.30 -76 02 20.76 15.30 ROSAT
2RXS J054317.3-760220 05 43 17.30 -76 02 20.76 15.30 ROSAT
1RXS J054317.4-760222 05 43 17.40 -76 02 21.84 15.32 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 MACS J0540-758#001 05 40 01.39 -75 53 04.20 0.38 MACS
2 MACS J0540-758#003 05 40 09.31 -75 52 04.44 0.78 MACS
3 MACS J0540-758#004 05 40 17.02 -75 51 29.52 1.53 MACS
4 MACS J0540-758#006 05 40 26.95 -75 53 53.88 1.96 MACS
5 MACS J0540-759#005 05 40 26.04 -75 54 50.40 2.62 MACS
6 MACS J0539-758#002 05 39 24.00 -75 51 14.04 2.72 MACS
7 MACS J0539-759#004 05 39 41.45 -75 55 10.92 2.77 MACS
8 MACS J0540-758#005 05 40 21.19 -75 50 04.20 2.88 MACS
9 MACS J0540-758#002 05 40 08.93 -75 49 46.56 2.95 MACS
10 MACS J0539-759#003 05 39 25.08 -75 54 43.56 3.01 MACS
11 MACS J0540-758#010 05 40 53.50 -75 53 02.04 3.19 MACS
12 MACS J0540-759#001 05 40 08.64 -75 55 52.32 3.21 MACS
13 MACS J0540-758#008 05 40 44.14 -75 50 35.16 3.35 MACS
14 MACS J0540-758#007 05 40 38.88 -75 49 57.00 3.57 MACS
15 MACS J0539-759#005 05 39 59.78 -75 56 17.52 3.60 MACS
16 MACS J0540-758#012 05 40 58.39 -75 51 29.16 3.67 MACS
17 MACS J0539-758#003 05 39 44.90 -75 49 07.68 3.71 MACS
18 MACS J0539-758#001 05 39 16.97 -75 50 08.88 3.73 MACS
19 MACS J0538-758#007 05 38 56.66 -75 52 29.64 3.96 MACS
20 MACS J0541-758#002 05 41 10.20 -75 51 50.04 4.28 MACS
21 MACS J0540-758#011 05 40 55.30 -75 49 34.68 4.53 MACS
22 MACS J0538-758#008 05 38 59.23 -75 49 32.16 4.95 MACS
23 MACS J0538-758#006 05 38 49.51 -75 50 10.32 5.07 MACS
24 MACS J0541-758#001 05 41 06.86 -75 49 21.36 5.20 MACS
25 MACS J0540-758#009 05 40 47.98 -75 48 04.68 5.42 MACS
26 MACS J0540-759#004 05 40 21.12 -75 58 00.84 5.45 MACS
27 MACS J0539-759#002 05 39 17.30 -75 57 32.76 5.55 MACS
28 MACS J0539-759#001 05 39 00.94 -75 57 06.12 5.75 MACS
29 MACS J0538-759#002 05 38 44.88 -75 56 13.56 5.85 MACS
30 MACS J0540-757#006 05 40 51.36 -75 47 32.64 5.98 MACS
31 MACS J0541-758#003 05 41 31.30 -75 50 14.64 6.00 MACS
32 MACS J0540-757#001 05 40 06.60 -75 46 31.80 6.17 MACS
33 MACS J0540-759#002 05 40 15.22 -75 58 54.84 6.28 MACS
34 MACS J0538-758#004 05 38 29.38 -75 49 42.96 6.37 MACS
35 MACS J0538-758#005 05 38 43.34 -75 48 20.52 6.46 MACS
36 MACS J0538-758#002 05 38 14.86 -75 53 09.60 6.52 MACS
37 MACS J0538-758#001 05 38 11.83 -75 52 28.20 6.70 MACS
38 MACS J0541-758#005 05 41 50.52 -75 53 57.84 6.76 MACS
39 MACS J0538-758#003 05 38 17.23 -75 50 17.52 6.81 MACS
40 MACS J0541-757#002 05 41 17.64 -75 47 39.84 6.85 MACS
41 MACS J0540-759#006 05 40 52.25 -75 58 53.76 6.93 MACS
42 MACS J0540-757#003 05 40 32.06 -75 46 00.12 6.95 MACS
43 MACS J0541-758#006 05 41 55.68 -75 52 59.16 6.97 MACS
44 MACS J0541-759#002 05 41 49.06 -75 55 08.76 6.99 MACS
MACS J0541-758#007 05 41 55.75 -75 53 20.40 6.99 MACS
45 GLEAM J053841-754733 05 38 41.59 -75 47 33.00 7.09 GLEAMEGCAT
MACS J0541-759#004 05 41 56.26 -75 54 16.92 7.17 MACS
46 MACS J0540-759#003 05 40 19.01 -75 59 56.04 7.32 MACS
47 MACS J0540-757#002 05 40 24.55 -75 45 27.72 7.37 MACS
SUMSS J053837-754723 05 38 37.20 -75 47 22.92 7.40 SUMSS
48 MACS J0538-759#005 05 38 59.81 -75 59 04.92 7.41 MACS
49 MACS J0539-757#002 05 39 54.58 -75 45 12.24 7.50 MACS
50 MACS J0541-759#001 05 41 41.98 -75 57 19.80 7.67 MACS
51 MACS J0539-760#007 05 39 46.08 -76 00 33.48 7.92 MACS
52 MACS J0540-757#004 05 40 34.39 -75 44 56.76 8.00 MACS
53 MACS J0541-758#004 05 41 48.70 -75 48 05.04 8.01 MACS
54 MACS J0538-759#004 05 38 56.98 -75 59 49.56 8.14 MACS
55 MACS J0542-758#002 05 42 16.82 -75 53 07.08 8.26 MACS
56 MACS J0539-760#005 05 39 15.82 -76 00 35.28 8.37 MACS
57 MACS J0541-757#001 05 41 01.73 -75 45 07.56 8.42 MACS
58 MACS J0542-759#002 05 42 17.47 -75 54 36.72 8.50 MACS
59 MACS J0540-757#005 05 40 39.36 -75 44 29.76 8.52 MACS
60 MACS J0541-759#005 05 41 56.78 -75 57 37.44 8.57 MACS
61 MACS J0538-759#003 05 38 45.14 -75 59 56.04 8.60 MACS
62 MACS J0541-757#006 05 41 48.79 -75 47 06.72 8.62 MACS
63 MACS J0537-758#007 05 37 40.22 -75 52 46.56 8.62 MACS
64 MACS J0542-758#001 05 42 15.82 -75 49 52.68 8.67 MACS
CD-75 227 05 42 15.79 -75 49 51.96 8.68 ACRS
HIP 26869 05 42 15.86 -75 49 52.32 8.68 HIPPARCOS
HD 39248 05 42 15.91 -75 49 51.24 8.69 HIC
PPM 368896 05 42 15.96 -75 49 51.60 8.69 PPM
65 MACS J0542-759#001 05 42 05.40 -75 57 01.80 8.70 MACS
SAO 256226 05 42 16.56 -75 49 50.16 8.73 SAO
66 PMN J0541-7600 05 41 10.80 -76 00 24.12 8.78 PMN
67 MACS J0540-760#002 05 40 23.95 -76 01 22.44 8.79 MACS
68 MACS J0542-758#003 05 42 25.15 -75 51 24.84 8.86 MACS
69 MACS J0541-759#003 05 41 49.61 -75 58 41.88 8.90 MACS
70 GLEAM J053917-760127 05 39 17.90 -76 01 27.12 9.15 GLEAMEGCAT
71 MACS J0537-758#006 05 37 31.51 -75 52 32.16 9.15 MACS
72 GLEAM J054015-760150 05 40 15.70 -76 01 50.88 9.19 GLEAMEGCAT
[PME2013] J0539-7601 05 39 17.90 -76 01 31.08 9.22 AT2FGLUS
[SPT2015] ATCA J0540-7601 05 40 11.81 -76 01 54.12 9.24 FER2FUSRID
[PME2013] J0540-7601 05 40 10.70 -76 01 54.84 9.24 AT2FGLUS
73 MACS J0538-759#001 05 38 11.26 -75 59 03.48 9.24 MACS
SUMSS J053916-760131 05 39 16.20 -76 01 31.08 9.25 SUMSS
[SPT2015] ATCA J0539-7601 05 39 17.81 -76 01 33.96 9.26 FER2FUSRID
74 MACS J0542-758#004 05 42 32.76 -75 51 47.16 9.27 MACS
SUMSS J054011-760156 05 40 11.40 -76 01 57.00 9.28 SUMSS
75 MACS J0541-757#005 05 41 44.88 -75 45 44.28 9.40 MACS
76 PPM 784214 05 39 32.52 -76 01 58.80 9.45 PPM
CD-76 232 05 39 32.40 -76 01 58.80 9.46 ACRS
MACS J0539-760#006 05 39 32.52 -76 01 59.52 9.47 MACS
77 MACS J0538-757#004 05 38 28.44 -75 45 04.68 9.51 MACS
78 MACS J0537-758#005 05 37 31.46 -75 50 07.44 9.52 MACS
79 MACS J0542-759#003 05 42 22.42 -75 56 56.04 9.56 MACS
PMN J0539-7601 05 39 16.70 -76 01 53.04 9.59 PMN
80 MACS J0538-760#005 05 38 41.50 -76 00 59.04 9.61 MACS
QORG J054123.3-760104 05 41 23.30 -76 01 04.08 9.74 QORGCAT
81 MACS J0537-759#003 05 37 32.81 -75 56 22.20 9.77 MACS
82 SUMSS J054123-760108 05 41 23.21 -76 01 08.04 9.79 SUMSS
[SPT2015] ATCA J0541-7601 05 41 23.59 -76 01 08.04 9.81 FER2FUSRID
[PME2013] J0541-7601 05 41 22.01 -76 01 13.08 9.82 AT2FGLUS
83 MACS J0542-758#005 05 42 41.64 -75 51 39.60 9.83 MACS
84 MACS J0537-758#004 05 37 23.52 -75 50 00.24 10.02 MACS
85 MACS J0537-758#003 05 37 14.71 -75 52 27.84 10.18 MACS
86 MACS J0542-759#005 05 42 50.42 -75 54 25.20 10.44 MACS
87 MACS J0542-757#001 05 42 03.77 -75 45 25.20 10.44 MACS
88 MACS J0539-760#001 05 39 06.58 -76 02 41.28 10.54 MACS
89 MACS J0537-758#002 05 37 10.18 -75 51 19.08 10.55 MACS
90 MACS J0538-757#006 05 38 38.23 -75 43 21.36 10.64 MACS
91 MACS J0538-760#003 05 38 23.28 -76 01 32.88 10.68 MACS
92 MACS J0541-757#007 05 41 55.25 -75 44 33.36 10.71 MACS
93 MACS J0542-759#004 05 42 44.18 -75 56 50.28 10.73 MACS
94 MACS J0538-757#003 05 38 22.73 -75 43 44.76 10.80 MACS
95 MACS J0539-760#003 05 39 13.22 -76 03 10.44 10.88 MACS
96 MACS J0539-757#001 05 39 07.58 -75 42 17.28 10.92 MACS
97 MACS J0542-757#005 05 42 20.11 -75 45 47.52 10.94 MACS
98 MACS J0543-758#001 05 43 00.43 -75 53 31.56 10.94 MACS
99 MACS J0537-758#001 05 37 02.76 -75 51 42.12 10.96 MACS
100 MACS J0537-757#005 05 37 34.92 -75 46 19.56 11.00 MACS
101 MACS J0542-758#006 05 42 54.91 -75 49 38.64 11.02 MACS
102 MACS J0541-757#004 05 41 43.75 -75 43 20.28 11.26 MACS
103 SUMSS J053701-755008 05 37 01.70 -75 50 08.16 11.28 SUMSS
104 MACS J0542-757#007 05 42 36.07 -75 46 29.28 11.31 MACS
105 MACS J0541-757#003 05 41 18.86 -75 42 23.04 11.35 MACS
106 MACS J0542-757#003 05 42 17.90 -75 45 00.72 11.35 MACS
107 MACS J0537-759#001 05 37 15.10 -75 57 50.76 11.36 MACS
MACS J0536-758#009 05 36 58.99 -75 50 28.68 11.37 MACS
108 MACS J0537-759#002 05 37 17.66 -75 58 24.24 11.48 MACS
GLEAM J053658-754950 05 36 58.61 -75 49 50.16 11.54 GLEAMEGCAT
109 MACS J0542-757#002 05 42 07.75 -75 44 07.08 11.55 MACS
110 MACS J0540-756#003 05 40 30.84 -75 41 16.44 11.56 MACS
111 MACS J0538-760#004 05 38 38.78 -76 03 08.64 11.59 MACS
112 MACS J0538-760#001 05 38 00.22 -76 01 39.36 11.60 MACS
113 MACS J0536-758#008 05 36 51.60 -75 51 26.28 11.66 MACS
114 MACS J0536-758#007 05 36 48.65 -75 52 00.12 11.79 MACS
115 MACS J0538-757#005 05 38 34.03 -75 42 11.52 11.79 MACS
116 MACS J0538-757#002 05 38 20.42 -75 42 35.28 11.86 MACS
117 SUMSS J053654-754927 05 36 54.70 -75 49 27.84 11.86 SUMSS
118 PGC 2801161 05 37 33.19 -75 44 44.88 12.07 PGC2003
ESO 053921-7546.2 05 37 32.64 -75 44 45.60 12.09 ESOUPPSALA
DENISP_G_J0537329-754444 05 37 32.90 -75 44 44.16 12.09 DENISIGAL
PGC 17530 05 37 32.59 -75 44 44.16 12.11 PGC2003
119 MACS J0536-758#006 05 36 46.94 -75 50 10.32 12.15 MACS
120 PGC 17527 05 37 24.19 -75 45 16.92 12.16 PGC2003
DENISP_G_J0537239-754517 05 37 23.90 -75 45 16.92 12.17 DENISIGAL
121 MACS J0536-759#002 05 36 51.55 -75 56 40.92 12.23 MACS
122 MACS J0543-759#001 05 43 07.70 -75 57 25.56 12.27 MACS
123 MACS J0541-760#002 05 41 38.45 -76 03 30.24 12.31 MACS
124 GLEAM J053725-760033 05 37 25.39 -76 00 33.84 12.32 GLEAMEGCAT
MACS J0537-757#004 05 37 29.09 -75 44 33.36 12.39 MACS
125 MACS J0538-760#006 05 38 50.26 -76 04 27.48 12.53 MACS
126 MACS J0538-757#001 05 38 00.14 -75 42 35.28 12.55 MACS
127 SUMSS J053703-755902 05 37 03.41 -75 59 03.12 12.55 SUMSS
128 MACS J0542-760#002 05 42 29.11 -76 01 40.80 12.69 MACS
129 PGC 147682 05 37 05.50 -75 45 56.88 12.71 PGC2003
DENISP_G_J0537054-754556 05 37 05.40 -75 45 56.16 12.73 DENISIGAL
130 HD 39150 05 41 36.46 -76 04 21.72 13.01 HIC
NSV 16656 05 41 36.60 -76 04 22.08 13.02 GCVSNSVARS
PPM 368890 05 41 36.65 -76 04 22.08 13.02 PPM
CD-76 235 05 41 36.60 -76 04 22.08 13.02 ACRS
HIP 26813 05 41 36.50 -76 04 23.16 13.03 HIPPARCOS
MACS J0541-760#001 05 41 36.50 -76 04 23.16 13.03 MACS
131 MACS J0537-757#002 05 37 14.33 -75 44 37.68 13.04 MACS
132 MACS J0537-757#003 05 37 26.59 -75 43 41.88 13.08 MACS
133 MACS J0542-757#006 05 42 34.22 -75 43 32.52 13.09 MACS
134 MACS J0537-760#002 05 37 05.78 -76 00 21.96 13.15 MACS
135 MACS J0542-757#004 05 42 18.02 -75 42 32.40 13.16 MACS
136 SUMSS J053822-760431 05 38 22.39 -76 04 31.08 13.27 SUMSS
MACS J0537-760#001 05 37 01.87 -76 00 19.08 13.31 MACS
GLEAM J053820-760432 05 38 20.59 -76 04 32.16 13.33 GLEAMEGCAT
137 MACS J0543-759#002 05 43 15.48 -75 59 03.12 13.39 MACS
138 MACS J0537-760#003 05 37 51.55 -76 03 44.28 13.57 MACS
139 MACS J0543-757#002 05 43 08.66 -75 45 16.20 13.66 MACS
140 PGC 147683 05 37 19.20 -75 43 15.96 13.71 PGC2003
DENISP_G_J0537190-754315 05 37 19.01 -75 43 14.88 13.73 DENISIGAL
141 MACS J0537-760#004 05 37 56.09 -76 04 19.92 13.90 MACS
142 MACS J0538-760#002 05 38 03.05 -76 04 36.48 13.91 MACS
143 SUMSS J053754-754050 05 37 54.91 -75 40 50.16 14.18 SUMSS
144 MACS J0537-757#001 05 37 07.03 -75 43 09.48 14.33 MACS
145 MACS J0542-760#001 05 42 19.56 -76 04 24.60 14.40 MACS
146 MACS J0536-757#006 05 36 46.49 -75 44 19.68 14.59 MACS
147 MACS J0542-760#003 05 42 34.94 -76 04 01.92 14.66 MACS
148 MACS J0542-756#002 05 42 34.13 -75 41 20.04 14.72 MACS
149 MACS J0543-757#001 05 43 03.79 -75 42 14.40 15.31 MACS

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