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 J1819.9-1530

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1819.9-1530 Swift-XRT detections in the field for 4FGL J1819.9-1530

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 20 24.68 -15 23 08.70 4.55 (6.0 ± 1.0) x 10-3 55 6.459 6.191

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 19 34.69 -15 35 15.24 5.24 (1.9 ± 0.6) x 10-3 19 3.095 2.989
2 18 19 21.97 -15 36 52.45 5.49 (1.7 ± 0.6) x 10-3 17 2.884 2.932
3 18 19 35.16 -15 23 00.50 5.64 (1.4 ± 0.5) x 10-3 17 2.702 2.663
4 18 20 37.67 -15 30 40.11 5.82 (1.3 ± 0.5) x 10-3 14 2.591 2.556
5 18 19 50.04 -15 21 12.61 5.24 (1.3 ± 0.6) x 10-3 18 2.661 2.315

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1819.9-1530 Swift-XRT image with known radio, optical and UV sources for 4FGL J1819.9-1530

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 4XMMs J181935.2-152619 18 19 35.21 -15 26 18.96 6.63 XMM-NEWTON
4XMM J181935.1-152619 18 19 35.14 -15 26 19.32 6.64 XMM-NEWTON
2 4XMMs J181927.2-152947 18 19 27.24 -15 29 47.76 7.32 XMM-NEWTON
3 4XMM J181958.3-153743 18 19 58.37 -15 37 44.04 7.57 XMM-NEWTON
4XMMs J181958.4-153744 18 19 58.39 -15 37 44.76 7.58 XMM-NEWTON
4 2CXO J181934.5-153519 18 19 34.51 -15 35 19.68 7.58 CHANDRA
4XMMs J181934.4-153518 18 19 34.39 -15 35 18.24 7.59 XMM-NEWTON
4XMM J181934.3-153518 18 19 34.39 -15 35 18.24 7.59 XMM-NEWTON
4XMM J181934.3-153518 18 19 34.34 -15 35 18.60 7.60 XMM-NEWTON
5 4XMM J181915.4-153117 18 19 15.50 -15 31 17.04 10.20 XMM-NEWTON
4XMMs J181915.4-153117 18 19 15.48 -15 31 17.40 10.21 XMM-NEWTON
6 4XMM J181920.0-153454 18 19 20.02 -15 34 54.12 10.21 XMM-NEWTON
4XMMs J181920.0-153454 18 19 20.04 -15 34 54.48 10.21 XMM-NEWTON
7 4XMM J181955.7-154027 18 19 55.73 -15 40 27.12 10.29 XMM-NEWTON
8 4XMMs J181916.3-152728 18 19 16.34 -15 27 28.08 10.30 XMM-NEWTON
4XMMs J181955.8-154028 18 19 55.80 -15 40 28.20 10.31 XMM-NEWTON
4XMM J181916.1-152723 18 19 16.15 -15 27 23.04 10.37 XMM-NEWTON
9 4XMM J181913.2-153144 18 19 13.20 -15 31 44.76 10.81 XMM-NEWTON
4XMMs J181913.2-153144 18 19 13.20 -15 31 44.76 10.81 XMM-NEWTON
10 4XMM J181923.4-153723 18 19 23.47 -15 37 23.52 10.95 XMM-NEWTON
4XMMs J181923.4-153724 18 19 23.47 -15 37 24.24 10.95 XMM-NEWTON
11 4XMMs J181914.8-153509 18 19 14.83 -15 35 09.24 11.45 XMM-NEWTON
12 4XMM J181910.1-153330 18 19 10.13 -15 33 29.88 11.91 XMM-NEWTON
4XMMs J181910.0-153329 18 19 10.06 -15 33 29.52 11.93 XMM-NEWTON
13 4XMM J181915.1-152344 18 19 15.14 -15 23 44.16 12.09 XMM-NEWTON
4XMMs J181915.1-152344 18 19 15.12 -15 23 44.16 12.09 XMM-NEWTON
14 4XMMs J181910.5-152528 18 19 10.56 -15 25 28.56 12.27 XMM-NEWTON
4XMM J181910.4-152528 18 19 10.49 -15 25 28.56 12.28 XMM-NEWTON
15 4XMMs J181919.0-153834 18 19 19.01 -15 38 34.44 12.53 XMM-NEWTON
4XMM J181918.9-153833 18 19 18.94 -15 38 33.36 12.54 XMM-NEWTON
16 4XMM J182021.0-154128 18 20 21.05 -15 41 28.68 12.64 XMM-NEWTON
4XMMs J182021.0-154129 18 20 21.05 -15 41 29.04 12.65 XMM-NEWTON
17 4XMM J181928.3-151846 18 19 28.39 -15 18 46.08 13.40 XMM-NEWTON
4XMMs J181928.4-151845 18 19 28.44 -15 18 45.36 13.40 XMM-NEWTON
ALS4923 18 19 28.20 -15 18 43.92 13.45 XMM-NEWTON
18 4XMM J181920.4-151845 18 19 20.45 -15 18 45.72 14.50 XMM-NEWTON
4XMMs J181920.4-151845 18 19 20.47 -15 18 45.36 14.50 XMM-NEWTON

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J181958-153020 18 19 58.10 -15 30 20.16 0.21 NVSS
2 NVSS J181950-153029 18 19 50.90 -15 30 29.88 1.64 NVSS
3 [WBH2005] G15.546-0.208 18 19 41.71 -15 31 14.88 3.98 WBHGP6CM
MAGPIS Discrete G15.54578-0.20 18 19 41.59 -15 31 14.16 3.99 MAGPIS
4 NVSS J182012-153239 18 20 12.41 -15 32 39.84 4.36 NVSS
5 PMN J1819-1525 18 19 59.40 -15 25 32.16 4.66 PMN
6 NVSS J181945-152619 18 19 45.41 -15 26 20.04 4.83 NVSS
7 [WBH2005] G15.658-0.305 18 20 16.49 -15 28 04.08 5.00 WBHGP6CM
8 MAGPIS Discrete G15.63751-0.17 18 19 44.59 -15 25 22.08 5.73 MAGPIS
9 NVSS J182018-152658 18 20 18.79 -15 26 58.92 6.03 NVSS
QORG J182018.9-152659 18 20 18.91 -15 26 58.92 6.04 QORGCAT
10 NVSS J181954-152357 18 19 54.70 -15 23 57.12 6.25 NVSS
11 NVSS J182015-152508 18 20 15.00 -15 25 09.12 6.55 NVSS
12 NVSS J182019-153355 18 20 19.90 -15 33 56.16 6.55 NVSS
13 WDS J18203-1535 18 20 18.00 -15 34 59.88 6.89 WDS
14 NVSS J181953-152301 18 19 53.71 -15 23 00.96 7.21 NVSS
15 NVSS J182022-153425 18 20 22.30 -15 34 26.04 7.31 NVSS
16 GPA 015.47-0.27 18 19 46.01 -15 37 03.00 7.43 GPA
17 NVSS J182028-153135 18 20 28.30 -15 31 36.12 7.53 NVSS
18 ADG015.6-00.1 18 19 27.19 -15 28 23.16 7.53 DIXON
[WBH2005] G15.526-0.144 18 19 25.51 -15 30 28.08 7.74 WBHGP6CM
[WBH2005] G15.523-0.142 18 19 24.50 -15 30 36.00 7.98 WBHGP6CM
19 WDS J18204-1535 18 20 24.00 -15 34 59.88 7.99 WDS
20 NVSS J182029-153241 18 20 29.11 -15 32 40.92 7.99 NVSS
[SPT2015] ATCA J1819-1530 18 19 24.31 -15 30 29.88 8.04 FER2FUSRID
21 NVSS J181923-153033 18 19 24.00 -15 30 33.12 8.12 NVSS
22 [PME2013] J1819-1527 18 19 25.51 -15 27 37.08 8.15 AT2FGLUS
[WBH2005] G15.570-0.121 18 19 25.61 -15 27 29.88 8.16 WBHGP6CM
[SPT2015] ATCA J1819-1527 18 19 25.61 -15 27 28.08 8.16 FER2FUSRID
MAGPIS Discrete G15.57045-0.12 18 19 25.51 -15 27 28.08 8.20 MAGPIS
NVSS J181923-153048 18 19 23.40 -15 30 47.88 8.27 NVSS
23 NVSS J182029-153344 18 20 29.11 -15 33 43.92 8.39 NVSS
24 NVSS J182031-152802 18 20 31.30 -15 28 03.00 8.39 NVSS
[WBH2005] G15.518-0.136 18 19 22.80 -15 30 42.84 8.41 WBHGP6CM
PMN J1819-1530 18 19 22.39 -15 30 37.08 8.49 PMN
25 NVSS J182010-152215 18 20 10.80 -15 22 14.88 8.53 NVSS
26 WDS J18202-1539 18 20 12.00 -15 39 00.00 9.49 WDS
27 MAGPIS Discrete G15.43823-0.20 18 19 28.10 -15 36 47.88 9.73 MAGPIS
28 PPM 719161 18 20 29.21 -15 23 53.16 9.87 PPM
29 NVSS J182032-152437 18 20 32.50 -15 24 38.16 10.08 NVSS
30 NVSS J181935-152139 18 19 35.11 -15 21 39.96 10.09 NVSS
31 NVSS J182027-152257 18 20 27.10 -15 22 58.08 10.12 NVSS
32 NVSS J181930-152223 18 19 30.50 -15 22 23.16 10.15 NVSS
33 PSR J1820-1529 18 20 40.80 -15 29 49.92 10.42 ATNFPULSAR
34 PPM 719136 18 19 26.57 -15 37 59.16 10.82 PPM
35 SAO 161327 18 19 21.96 -15 36 46.80 10.83 SAO
FO Ser 18 19 21.91 -15 36 46.80 10.84 HIC
PPM 234359 18 19 21.84 -15 36 46.08 10.85 PPM
BD-15 4923 18 19 21.82 -15 36 46.08 10.86 ACRS
FO Ser 18 19 21.82 -15 36 46.08 10.86 GCVS
HIP 89783 18 19 21.82 -15 36 46.08 10.86 HIPPARCOS
36 NVSS J182007-151926 18 20 07.51 -15 19 27.12 10.98 NVSS
37 NVSS J182043-152924 18 20 43.61 -15 29 25.08 11.12 NVSS
38 GPA 015.76-0.16 18 19 56.11 -15 18 42.12 11.47 GPA
39 MAGPIS Discrete G15.39997-0.25 18 19 35.50 -15 40 22.08 11.51 MAGPIS
[WBH2005] G15.399-0.258 18 19 35.50 -15 40 23.88 11.53 WBHGP6CM
40 [WBH2005] G15.510-0.081 18 19 09.70 -15 29 35.16 11.55 WBHGP6CM
MAGPIS Discrete G15.51002-0.08 18 19 09.70 -15 29 33.00 11.55 MAGPIS
41 NVSS J182027-153917 18 20 27.91 -15 39 18.00 11.69 NVSS
42 NVSS J181929-152022 18 19 29.21 -15 20 21.84 11.95 NVSS
43 NVSS J181932-151912 18 19 31.99 -15 19 12.00 12.58 NVSS
44 NVSS J182031-151900 18 20 31.01 -15 19 00.84 13.76 NVSS
45 NVSS J182047-151850 18 20 47.40 -15 18 51.12 16.50 NVSS

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