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 J1831.6-0223c

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1831.6-0223c Swift-XRT detections in the field for 4FGL J1831.6-0223c


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 18 31 23.36 -02 22 43.02 6.31 (3.6 ± 1.2) x 10-3 18 2.881 2.939
2 18 32 00.12 -02 30 20.08 7.71 (2.5 ± 1.0) x 10-3 10 2.301 2.377
3 18 32 07.50 -02 32 11.85 6.31 (2.4 ± 1.1) x 10-3 9 2.540 2.222
4 18 32 02.15 -02 35 44.02 6.65 (2.2 ± 1.0) x 10-3 10 2.709 2.190

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1831.6-0223c Swift-XRT image with known radio, optical and UV sources for 4FGL J1831.6-0223c

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 MPCM J183137.20-021549.5 18 31 37.20 -02 15 49.68 7.66 CHANDRA
2 MPCM J183140.08-021527.1 18 31 40.08 -02 15 27.00 8.02 CHANDRA
2CXO J183140.7-021514 18 31 40.70 -02 15 14.40 8.23 CHANDRA
3 MPCM J183134.52-021512.1 18 31 34.51 -02 15 12.24 8.35 CHANDRA
4 MPCM J183137.58-021455.9 18 31 37.58 -02 14 56.04 8.54 CHANDRA
5 CXOW40 J183134.02-021428.8 18 31 34.03 -02 14 28.68 9.08 CHANDRA
2CXO J183134.2-021427 18 31 34.25 -02 14 27.24 9.10 CHANDRA
6 2CXO J183158.2-021540 18 31 58.20 -02 15 40.68 9.12 CHANDRA
X183158.22-021539.9 18 31 58.22 -02 15 39.96 9.13 CHANDRA
7 CXOW40 J183129.75-021438.4 18 31 29.76 -02 14 38.40 9.14 CHANDRA
8 MPCM J183125.54-021450.3 18 31 25.56 -02 14 50.28 9.28 CHANDRA
9 MPCM J183121.97-021450.1 18 31 21.96 -02 14 50.28 9.65 CHANDRA
CXOW40 J183122.07-021449.3 18 31 22.08 -02 14 49.20 9.65 CHANDRA
CXOGSG J183122.0-021448 18 31 22.06 -02 14 48.48 9.66 CHANDRA
10 MPCM J183139.51-021347.1 18 31 39.50 -02 13 47.28 9.68 CHANDRA
11 MPCM J183144.32-021350.9 18 31 44.33 -02 13 50.88 9.70 CHANDRA
X183122.18-021444.9 18 31 22.18 -02 14 44.88 9.70 CHANDRA
12 MPCM J183119.90-021447.1 18 31 19.90 -02 14 47.04 9.93 CHANDRA
13 MPCM J183135.94-021330.7 18 31 35.95 -02 13 30.72 9.99 CHANDRA
14 2CXO J183124.8-021403 18 31 24.82 -02 14 03.12 10.08 CHANDRA
MPCM J183134.28-021326.1 18 31 34.27 -02 13 26.04 10.11 CHANDRA
CXOW40 J183124.74-021422.6 18 31 24.74 -02 14 01.68 10.11 CHANDRA
MPCM J183144.14-021322.4 18 31 44.14 -02 13 22.44 10.17 CHANDRA
15 MPCM J183134.48-021304.9 18 31 34.49 -02 13 05.16 10.45 CHANDRA
16 CXOGSG J183137.6-021257 18 31 37.68 -02 12 57.96 10.51 CHANDRA
2CXO J183137.7-021257 18 31 37.70 -02 12 57.60 10.51 CHANDRA
X183137.67-021257.6 18 31 37.68 -02 12 57.60 10.51 CHANDRA
CXOW40 J183137.70-021257.3 18 31 37.70 -02 12 57.24 10.52 CHANDRA
MPCM J183137.67-021257.2 18 31 37.68 -02 12 57.24 10.52 CHANDRA
MPCM J183133.28-021301.4 18 31 33.29 -02 13 01.56 10.55 CHANDRA
CXOGSG J183135.2-021255 18 31 35.28 -02 12 55.44 10.59 CHANDRA
2CXO J183135.3-021254 18 31 35.35 -02 12 55.08 10.59 CHANDRA
X183135.38-021255.0 18 31 35.38 -02 12 55.08 10.59 CHANDRA
MPCM J183135.33-021254.8 18 31 35.33 -02 12 54.72 10.60 CHANDRA
CXOW40 J183135.32-021254.6 18 31 35.33 -02 12 54.72 10.60 CHANDRA
17 X183145.15-021238.1 18 31 45.14 -02 12 38.16 10.93 CHANDRA
2CXO J183145.2-021237 18 31 45.22 -02 12 37.80 10.94 CHANDRA
MPCM J183145.18-021237.7 18 31 45.19 -02 12 37.80 10.94 CHANDRA
CXOW40 J183145.17-021237.6 18 31 45.17 -02 12 37.44 10.94 CHANDRA
MPCM J183137.62-021231.1 18 31 37.63 -02 12 31.32 10.95 CHANDRA
18 MPCM J183129.65-021244.4 18 31 29.66 -02 12 44.64 10.99 CHANDRA
CXOW40 J183129.66-021244.5 18 31 29.66 -02 12 44.64 10.99 CHANDRA
19 MPCM J183135.85-021228.9 18 31 35.86 -02 12 29.16 11.02 CHANDRA
2CXO J183130.6-021237 18 31 30.62 -02 12 37.44 11.06 CHANDRA
20 MPCM J183133.81-021229.3 18 31 33.82 -02 12 29.52 11.06 CHANDRA
21 CXOGSG J183117.6-021347 18 31 17.62 -02 13 47.64 11.08 CHANDRA
2CXO J183117.5-021347 18 31 17.54 -02 13 47.28 11.09 CHANDRA
MPCM J183135.50-021224.4 18 31 35.50 -02 12 24.48 11.10 CHANDRA
X183117.54-021346.9 18 31 17.54 -02 13 46.92 11.10 CHANDRA
CXOW40 J183117.52-021346.8 18 31 17.52 -02 13 46.92 11.10 CHANDRA
MPCM J183128.38-021238.3 18 31 28.39 -02 12 38.52 11.16 CHANDRA
22 CXOW40 J183121.63-021245.9 18 31 21.62 -02 12 46.08 11.57 CHANDRA
2CXO J183121.6-021245 18 31 21.65 -02 12 45.36 11.57 CHANDRA
23 2CXO J183117.3-021315 18 31 17.35 -02 13 15.96 11.57 CHANDRA
CXOGSG J183121.5-021245 18 31 21.55 -02 12 45.72 11.58 CHANDRA
CXOW40 J183117.31-021315.7 18 31 17.30 -02 13 15.60 11.58 CHANDRA
X183121.47-021245.9 18 31 21.48 -02 12 46.08 11.58 CHANDRA
MPCM J183117.30-021315.5 18 31 17.30 -02 13 15.60 11.59 CHANDRA
X183117.32-021314.8 18 31 17.33 -02 13 14.88 11.59 CHANDRA
CXOGSG J183117.2-021314 18 31 17.23 -02 13 14.52 11.61 CHANDRA
24 CXOW40 J183126.25-021217.6 18 31 26.26 -02 12 17.64 11.63 CHANDRA
25 X183136.98-021150.1 18 31 36.98 -02 11 50.28 11.64 CHANDRA
CXOW40 J183136.97-021149.7 18 31 36.96 -02 11 49.56 11.65 CHANDRA
MPCM J183136.98-021149.4 18 31 36.98 -02 11 49.56 11.66 CHANDRA
26 MPCM J183142.63-021149.0 18 31 42.62 -02 11 49.20 11.68 CHANDRA
2CXO J183137.2-021147 18 31 37.20 -02 11 47.40 11.69 CHANDRA
27 MPCM J183147.91-021155.9 18 31 47.93 -02 11 56.04 11.74 CHANDRA
CXOGSG J183147.9-021155 18 31 47.90 -02 11 55.68 11.74 CHANDRA
2CXO J183147.9-021155 18 31 47.95 -02 11 55.68 11.74 CHANDRA
X183147.94-021155.8 18 31 47.95 -02 11 55.68 11.74 CHANDRA
CXOW40 J183147.91-021155.5 18 31 47.90 -02 11 55.68 11.74 CHANDRA
CXOW40 J183149.18-021155.4 18 31 49.18 -02 11 55.32 11.81 CHANDRA
CXOGSG J183119.9-021236 18 31 19.97 -02 12 36.36 11.88 CHANDRA
CXOW40 J183119.95-021236.4 18 31 19.94 -02 12 36.36 11.88 CHANDRA
MPCM J183119.95-021235.9 18 31 19.97 -02 12 36.00 11.89 CHANDRA
2CXO J183119.9-021235 18 31 19.94 -02 12 36.00 11.89 CHANDRA
X183119.98-021235.6 18 31 19.97 -02 12 35.64 11.89 CHANDRA
28 MPCM J183133.00-021139.2 18 31 33.00 -02 11 39.48 11.91 CHANDRA
MPCM J183120.17-021228.4 18 31 20.18 -02 12 28.44 11.98 CHANDRA
29 MPCM J183119.00-021232.9 18 31 19.01 -02 12 33.12 12.03 CHANDRA
30 MPCM J183122.56-021210.5 18 31 22.56 -02 12 10.44 12.03 CHANDRA
31 2CXO J183120.2-021151 18 31 20.23 -02 11 51.36 12.54 CHANDRA
MPCM J183120.20-021151.2 18 31 20.21 -02 11 51.36 12.55 CHANDRA
CXOW40 J183120.20-021151.3 18 31 20.21 -02 11 51.36 12.55 CHANDRA
32 2CXO J183215.8-021447 18 32 15.86 -02 14 47.76 12.60 CHANDRA
CXOW40 J183120.10-021137.8 18 31 20.11 -02 11 37.68 12.76 CHANDRA
MPCM J183120.17-021136.0 18 31 20.18 -02 11 35.88 12.79 CHANDRA
33 X183107.87-021306.6 18 31 07.87 -02 13 06.60 12.99 CHANDRA
2CXO J183107.8-021306 18 31 07.85 -02 13 06.24 12.99 CHANDRA
MPCM J183107.85-021306.2 18 31 07.87 -02 13 06.24 12.99 CHANDRA
CXOW40 J183107.85-021349.9 18 31 07.85 -02 13 05.88 13.00 CHANDRA
CXOGSG J183107.8-021305 18 31 07.87 -02 13 05.88 13.00 CHANDRA
X183107.69-021305.9 18 31 07.68 -02 13 05.88 13.02 CHANDRA
34 X183110.86-021218.1 18 31 10.87 -02 12 18.00 13.23 CHANDRA
35 X183114.75-021144.4 18 31 14.76 -02 11 44.52 13.23 CHANDRA
MPCM J183114.58-021145.1 18 31 14.59 -02 11 45.24 13.23 CHANDRA
CXOW40 J183114.82-021143.3 18 31 14.83 -02 11 43.44 13.23 CHANDRA
2CXO J183114.6-021144 18 31 14.69 -02 11 44.16 13.24 CHANDRA
36 2CXO J183209.5-021215 18 32 09.60 -02 12 15.84 13.53 CHANDRA
37 X183102.69-021220.8 18 31 02.69 -02 12 20.88 14.39 CHANDRA
2CXO J183102.7-021220 18 31 02.74 -02 12 20.16 14.39 CHANDRA
CXOW40 J183102.64-021220.6 18 31 02.64 -02 12 20.52 14.40 CHANDRA
38 2CXO J183222.3-021333 18 32 22.32 -02 13 33.60 14.63 CHANDRA
39 MPCM J183058.47-021224.4 18 30 58.49 -02 12 24.48 15.03 CHANDRA
40 MPCM J183101.23-021141.3 18 31 01.22 -02 11 41.28 15.13 CHANDRA
MPCM J183101.77-021131.8 18 31 01.78 -02 11 31.92 15.17 CHANDRA
41 MPCM J183055.68-021145.8 18 30 55.68 -02 11 45.96 15.98 CHANDRA
MPCM J183055.46-021132.5 18 30 55.46 -02 11 32.64 16.18 CHANDRA

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 HIP 90832 18 31 46.18 -02 25 06.60 2.39 HIPPARCOS
PPM 180355 18 31 46.20 -02 25 06.60 2.39 PPM
HD 170857 18 31 46.20 -02 25 06.96 2.40 HIC
SAO 142368 18 31 46.20 -02 25 07.32 2.40 SAO
BD-02 4647 18 31 46.20 -02 25 06.96 2.40 ACRS
2 NVSS J183131-022719 18 31 31.80 -02 27 19.08 4.29 NVSS
3 NSV 24487 18 31 24.91 -02 20 08.88 4.88 GCVSNSVARS
4 NVSS J183134-021820 18 31 34.39 -02 18 20.16 5.27 NVSS
5 NVSS J183125-021844 18 31 25.70 -02 18 45.00 5.81 NVSS
6 PMN J1831-0217 18 31 34.90 -02 17 03.84 6.49 PMN
7 NVSS J183208-022325 18 32 09.00 -02 23 25.08 7.43 NVSS
8 NVSS J183208-022048 18 32 08.81 -02 20 48.12 7.84 NVSS
9 LMH 33 18 31 54.41 -02 15 47.16 8.58 DIXON
VLSSr J183102.1-022453 18 31 02.21 -02 24 54.00 9.37 VLSSR
10 NVSS J183213-022728 18 32 13.30 -02 27 29.16 9.40 NVSS
PMN J1831-0224 18 31 01.70 -02 24 36.00 9.45 PMN
TGSSADR J183101.7-022503 18 31 01.70 -02 25 04.08 9.50 GMRTAS150M
11 NVSS J183101-022504 18 31 01.70 -02 25 04.08 9.51 NVSS
TXS 1828-024 18 31 01.61 -02 25 00.84 9.52 TEXAS
1828-024 18 31 01.39 -02 24 55.08 9.56 MRC
12 NVSS J183210-021710 18 32 10.10 -02 17 09.96 9.95 NVSS
13 LHE448 18 31 36.79 -02 33 47.88 10.35 DIXON
14 NVSS J183220-022125 18 32 20.50 -02 21 25.92 10.50 NVSS
15 NVSS J183211-021612 18 32 11.90 -02 16 13.08 10.92 NVSS
16 NVSS J183059-022803 18 30 58.99 -02 28 04.08 11.04 NVSS
17 NVSS J183223-022432 18 32 23.50 -02 24 33.12 11.10 NVSS
18 NVSS J183054-022757 18 30 54.79 -02 27 56.88 11.98 NVSS
19 NVSS J183226-022809 18 32 26.50 -02 28 09.12 12.70 NVSS
20 NVSS J183224-022956 18 32 24.41 -02 29 56.04 13.01 NVSS
21 NVSS J183210-021202 18 32 10.10 -02 12 02.88 13.77 NVSS
22 NVSS J183102-023402 18 31 02.30 -02 34 03.00 14.04 NVSS
23 NVSS J183222-023323 18 32 22.30 -02 33 23.04 14.63 NVSS
TGSSADR J183222.4-023321 18 32 22.51 -02 33 21.96 14.65 GMRTAS150M
24 NVSS J183101-023516 18 31 01.49 -02 35 17.16 15.11 NVSS
25 GBS-VLA J183101.07-021136.8 18 31 01.10 -02 11 36.96 15.21 VLAGBSSER

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