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 J1816.7+1749

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1816.7+1749 Swift-XRT detections in the field for 4FGL J1816.7+1749

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 16 52.77 +17 57 03.51 4.30 (1.5 ± 0.2) x 10-2 89 8.761 8.946
2 18 16 20.18 +17 48 00.54 4.44 (7.5 ± 1.4) x 10-3 57 6.114 5.577
3 18 16 47.72 +17 45 05.97 5.76 (2.9 ± 0.9) x 10-3 21 3.366 3.180

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 16 05.22 +17 47 00.91 4.01 (3.3 ± 1.2) x 10-3 65 5.971 2.770
2 18 17 12.00 +17 54 38.26 7.09 (1.7 ± 0.7) x 10-3 9 2.468 2.525
3 18 17 12.41 +17 59 18.15 6.93 (1.3 ± 0.6) x 10-3 9 2.454 2.392
4 18 15 29.78 +17 56 22.47 7.27 (1.3 ± 0.6) x 10-3 7 2.280 2.318
5 18 16 07.57 +17 49 43.75 4.97 (1.6 ± 0.8) x 10-3 18 2.903 2.198
6 18 16 05.21 +17 47 11.19 4.02 (2.0 ± 1.0) x 10-3 78 4.740 2.034
7 18 16 05.22 +17 47 00.91 4.01 (1.6 ± 0.9) x 10-3 65 3.119 1.835
8 18 16 13.99 +17 47 04.53 4.80 (1.2 ± 0.7) x 10-3 27 2.937 1.771
9 18 16 14.73 +17 48 50.27 4.69 (1.2 ± 0.7) x 10-3 23 2.544 1.695
10 18 16 05.10 +17 47 01.57 4.02 (1.5 ± 1.0) x 10-3 63 2.956 1.523
11 18 16 05.45 +17 47 23.16 4.02 (1.3 ± 1.0) x 10-3 80 5.298 1.336
12 18 16 00.41 +17 46 07.67 4.50 (8 ± 6) x 10-4 24 2.740 1.311
13 18 16 09.56 +17 47 47.09 4.24 (1.1 ± 0.9) x 10-3 29 3.089 1.267
14 18 16 05.49 +17 47 37.06 4.04 (9 ± 9) x 10-4 61 2.543 1.075
15 18 16 12.92 +17 47 09.15 4.55 (5 ± 12) x 10-4 29 2.751 0.390

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1816.7+1749 Swift-XRT image with known radio, optical and UV sources for 4FGL J1816.7+1749

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1RXS J181654.3+175713 18 16 54.31 +17 57 13.68 7.87 ROSAT
2RXS J181654.2+175714 18 16 54.31 +17 57 14.40 7.88 ROSAT
2RXS J181654.2+175714 18 16 54.31 +17 57 14.40 7.88 ROSAT
2 2RXS J181711.5+175438 18 17 11.54 +17 54 38.88 8.03 ROSAT
2RXS J181711.5+175438 18 17 11.54 +17 54 38.88 8.03 ROSAT
3 2RXS J181610.0+174843 18 16 10.08 +17 48 43.56 8.38 ROSAT
2RXS J181610.0+174843 18 16 10.08 +17 48 43.56 8.38 ROSAT
1RXS J181610.0+174852 18 16 10.01 +17 48 52.56 8.38 ROSAT
4 1RXS J181606.9+174647 18 16 06.91 +17 46 47.64 9.53 ROSAT
5 2RXS J181557.7+174530 18 15 57.79 +17 45 30.24 12.00 ROSAT
2RXS J181557.7+174530 18 15 57.79 +17 45 30.24 12.00 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 PGC 2809066 18 16 47.40 +17 47 13.92 2.50 PGC2003
2 PGC 2809051 18 16 43.30 +17 46 30.00 3.20 PGC2003
3 MITG J1816+1747b 18 16 58.90 +17 47 07.08 4.17 MITGB6CM
4 HD 348300 18 16 30.48 +17 52 40.44 4.58 HDEC
5 HD 348303 18 16 43.80 +17 44 26.52 5.24 HDEC
VLSSr J181619.8+174816 18 16 19.80 +17 48 16.92 6.17 VLSSR
6 NVSS J181619+174806 18 16 19.90 +17 48 06.84 6.19 NVSS
TGSSADR J181619.7+174804 18 16 19.70 +17 48 05.04 6.23 GMRTAS150M
GLEAM J181619+174801 18 16 19.70 +17 48 02.16 6.26 GLEAMEGCAT
7 PGC 2809017 18 16 24.70 +17 45 02.88 6.70 PGC2003
8 PGC 2808998 18 16 17.59 +17 48 06.12 6.72 PGC2003
9 PGC 2809130 18 17 14.11 +17 47 39.12 7.21 PGC2003
10 PGC 2808987 18 16 13.90 +17 49 08.04 7.43 PGC2003
11 PGC 2809081 18 16 51.50 +17 42 15.84 7.57 PGC2003
12 V1445 Her 18 16 52.78 +17 57 03.24 7.61 GCVS
13 NVSS J181623+174313 18 16 23.40 +17 43 14.16 8.26 NVSS
14 MITG J1816+1747a 18 16 09.10 +17 47 27.96 8.84 MITGB6CM
15 HD 348304 18 16 56.59 +17 40 53.40 9.20 HDEC
16 PGC 2809148 18 17 21.19 +17 53 58.92 9.62 PGC2003
GB6 J1816+1747 18 16 05.81 +17 47 11.04 9.67 GB6
MITG J1816+1746 18 16 06.10 +17 46 54.84 9.67 MITGB6CM
17 PGC 2808971 18 16 10.70 +17 55 00.12 9.76 PGC2003
1813+1746 18 16 04.90 +17 47 26.88 9.81 NORTH20CM
1813+1746 18 16 04.90 +17 47 26.88 9.81 NORTH6CM
18 MITG J1816+1745 18 16 06.91 +17 45 56.16 9.82 MITGB6CM
VLSSr J181605.0+174704 18 16 05.11 +17 47 04.92 9.87 VLSSR
1813+177 18 16 04.99 +17 46 50.16 9.94 MRC
GLEAM J181604+174658 18 16 04.80 +17 46 59.16 9.95 GLEAMEGCAT
PGC 1541552 18 16 04.80 +17 46 59.16 9.95 PGC2003
TXS 1813+177 18 16 04.80 +17 46 59.88 9.96 TEXAS
TGSSADR J181604.6+174657 18 16 04.70 +17 46 57.00 9.99 GMRTAS150M
19 NVSS J181604+174658 18 16 04.61 +17 46 59.16 9.99 NVSS
20 PGC 2809134 18 17 16.10 +17 56 25.08 10.00 PGC2003
21 NVSS J181613+174238 18 16 13.30 +17 42 38.16 10.33 NVSS
22 NVSS J181659+175940 18 16 59.11 +17 59 39.84 10.54 NVSS
23 NVSS J181651+180133 18 16 51.10 +18 01 32.88 11.97 NVSS
24 PGC 2808956 18 16 01.99 +17 55 55.92 12.00 PGC2003
25 OU+124 18 16 04.49 +17 42 05.04 12.27 DIXON
GB6 J1817+1759 18 17 24.19 +17 59 57.84 13.88 GB6
1815+1758 18 17 25.20 +18 00 02.88 14.11 NORTH6CM
QORG J181725.5+180001 18 17 25.51 +18 00 01.08 14.13 QORGCAT
26 NVSS J181725+180003 18 17 25.61 +18 00 02.88 14.17 NVSS
TGSSADR J181725.5+180004 18 17 25.51 +18 00 03.96 14.17 GMRTAS150M
27 NVSS J181727+173941 18 17 27.50 +17 39 41.04 14.21 NVSS
28 PGC 2809154 18 17 25.80 +17 37 53.04 15.27 PGC2003

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