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 J1823.8-3544

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1823.8-3544 Swift-XRT detections in the field for 4FGL J1823.8-3544

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 22 57.27 -35 45 13.42 4.25 (2.9 ± 0.6) x 10-3 56 5.147 4.956
2 18 24 06.98 -35 49 07.17 4.24 (3.1 ± 0.7) x 10-3 70 5.136 4.745
3 18 23 56.92 -35 48 00.20 4.49 (2.8 ± 0.6) x 10-3 52 4.461 4.635
4 18 23 17.96 -35 33 56.62 4.37 (2.2 ± 0.5) x 10-3 43 3.974 4.160
5 18 23 13.38 -35 38 08.12 4.24 (2.1 ± 0.5) x 10-3 55 3.883 3.915
6 18 24 28.92 -35 45 09.79 4.48 (1.9 ± 0.5) x 10-3 45 3.882 3.827

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 24 14.73 -35 49 33.49 4.32 (1.2 ± 0.5) x 10-3 52 2.812 2.689

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1823.8-3544 Swift-XRT image with known radio, optical and UV sources for 4FGL J1823.8-3544


No known X-ray or gamma ray sources found.

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 V1189 Sgr 18 23 36.53 -35 45 53.28 3.51 GCVS
2 V3223 Sgr 18 24 04.66 -35 41 27.24 3.89 GCVS
3 SAO 210090 18 24 12.50 -35 45 50.40 4.35 SAO
CD-3512562 18 24 12.82 -35 45 49.68 4.41 ACRS
PPM 297656 18 24 12.82 -35 45 49.68 4.41 PPM
4 V3194 Sgr 18 23 30.12 -35 42 42.84 4.80 GCVS
5 PGC 206166 18 24 18.19 -35 44 30.84 5.27 PGC2003
6 NVSS J182406-353941 18 24 06.60 -35 39 41.04 5.56 NVSS
SUMSS J182407-354912 18 24 07.01 -35 49 12.00 5.65 SUMSS
7 PGC 206168 18 24 19.70 -35 43 27.84 5.65 PGC2003
8 NVSS J182407-354911 18 24 07.20 -35 49 10.92 5.65 NVSS
9 CGMW 4-737 18 24 20.40 -35 44 47.04 5.72 CGMW
10 V3233 Sgr 18 24 18.41 -35 41 45.60 5.94 GCVS
11 V3230 Sgr 18 24 10.25 -35 39 16.56 6.31 GCVS
12 CGMW 4-739 18 24 23.30 -35 45 56.88 6.49 CGMW
13 V3225 Sgr 18 24 07.27 -35 50 33.00 6.86 GCVS
14 NVSS J182425-354610 18 24 25.51 -35 46 10.92 6.98 NVSS
15 NVSS J182426-354443 18 24 26.90 -35 44 43.08 7.04 NVSS
16 HD 321726 18 24 12.60 -35 38 39.48 7.08 HDEC
17 NVSS J182427-354353 18 24 27.91 -35 43 54.12 7.26 NVSS
18 V3234 Sgr 18 24 18.55 -35 39 29.16 7.27 GCVS
WDS J18243-3539 18 24 18.00 -35 38 60.00 7.53 WDS
19 V1190 Sgr 18 23 39.89 -35 51 57.24 7.95 GCVS
20 PGC 206116 18 23 14.71 -35 39 09.00 9.26 PGC2003
CGMW 4-684 18 23 14.69 -35 39 09.00 9.27 CGMW
SUMSS J182437-354257 18 24 37.70 -35 42 56.88 9.35 SUMSS
21 NVSS J182437-354259 18 24 37.80 -35 42 59.04 9.35 NVSS
TGSSADR J182437.8-354300 18 24 37.80 -35 43 00.84 9.35 GMRTAS150M
22 PPM 749663 18 24 02.18 -35 35 16.08 9.36 PPM
GLEAM J182437-354250 18 24 37.80 -35 42 50.04 9.37 GLEAMEGCAT
23 NSV 10727 18 24 11.40 -35 35 34.08 9.66 GCVSNSVARS
24 NVSS J182303-354600 18 23 03.19 -35 46 00.84 10.08 NVSS
25 SAO 210104 18 24 36.00 -35 38 26.88 10.70 SAO
CD-3512570 18 24 36.14 -35 38 22.92 10.76 ACRS
PPM 297667 18 24 36.14 -35 38 22.20 10.77 PPM
HD 321727 18 24 36.14 -35 38 22.20 10.77 HDEC
26 NVSS J182349-353337 18 23 49.10 -35 33 38.16 10.81 NVSS
27 V3255 Sgr 18 24 44.93 -35 46 03.36 10.81 GCVS
SUMSS J182349-353335 18 23 49.30 -35 33 34.92 10.85 SUMSS
28 NVSS J182427-353549 18 24 27.79 -35 35 48.84 11.22 NVSS
29 PGC 206109 18 23 10.10 -35 52 26.04 11.72 PGC2003
30 CGMW 4-672 18 23 05.69 -35 37 04.08 11.97 CGMW
31 V3245 Sgr 18 24 32.35 -35 53 15.72 12.02 GCVS
PGC 61811 18 23 05.40 -35 37 03.00 12.03 PGC2003
ESO 181944-3538.5 18 23 05.28 -35 37 01.20 12.07 ESOUPPSALA
32 PGC 206136 18 23 39.91 -35 32 34.08 12.11 PGC2003
33 V3195 Sgr 18 23 30.34 -35 55 49.44 12.25 GCVS
34 NVSS J182422-355611 18 24 22.30 -35 56 12.12 13.26 NVSS
SUMSS J182421-355622 18 24 22.01 -35 56 21.84 13.39 SUMSS
35 V3261 Sgr 18 24 51.12 -35 38 12.12 13.47 GCVS
36 WDS J18248-3535 18 24 48.00 -35 34 59.88 14.73 WDS

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