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 J2042.7+1519

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J2042.7+1519 Swift-XRT detections in the field for 4FGL J2042.7+1519

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 20 42 59.92 +15 21 06.58 3.60 (4.6 ± 0.2) x 10-2 839 28.600 26.840
2 20 43 14.14 +15 36 00.96 3.98 (4.6 ± 0.5) x 10-3 113 9.892 9.109
3 20 43 20.25 +15 13 14.23 4.56 (3.0 ± 0.4) x 10-3 57 6.817 6.865
4 20 42 04.24 +15 33 24.81 4.38 (1.4 ± 0.3) x 10-3 39 4.409 4.479
5 20 42 36.53 +15 29 01.27 4.64 (9 ± 3) x 10-4 30 2.879 3.196

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 20 42 12.02 +15 21 58.21 4.63 (7 ± 3) x 10-4 34 3.155 2.861
2 20 42 56.21 +15 29 35.35 4.40 (7 ± 3) x 10-4 39 3.212 2.832
3 20 42 27.03 +15 16 22.13 5.70 (6 ± 2) x 10-4 18 2.938 2.798
4 20 43 13.96 +15 30 24.93 4.52 (6 ± 2) x 10-4 25 2.982 2.738
5 20 42 23.86 +15 32 13.73 4.59 (6 ± 2) x 10-4 23 2.834 2.573
6 20 42 04.97 +15 26 21.08 4.46 (6 ± 2) x 10-4 38 2.711 2.442
7 20 42 35.73 +15 21 26.10 4.59 (6 ± 3) x 10-4 40 2.887 2.315
8 20 43 09.74 +15 23 44.25 4.55 (5 ± 2) x 10-4 34 2.777 2.267
9 20 42 26.50 +15 22 23.65 4.52 (5 ± 2) x 10-4 38 2.777 2.243
10 20 43 15.56 +15 25 19.10 4.59 (5 ± 2) x 10-4 27 2.766 2.128
11 20 42 31.77 +15 20 45.95 4.51 (4 ± 2) x 10-4 42 2.639 1.987
12 20 43 14.14 +15 36 01.02 3.98 N/A 110 2.834 N/A
13 20 42 59.90 +15 21 06.27 3.60 N/A 835 3.741 N/A

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J2042.7+1519 Swift-XRT image with known radio, optical and UV sources for 4FGL J2042.7+1519

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 XMMSL2 J204259.4+152108 20 42 59.52 +15 21 08.28 3.33 XMM-NEWTON
XMMSL2 J204259.4+152108 20 42 59.52 +15 21 08.28 3.33 XMM-NEWTON
1RXS J204300.2+152116 20 43 00.19 +15 21 15.84 3.53 ROSAT
1RXS J204300.2+152116 20 43 00.19 +15 21 15.84 3.53 ROSAT
2RXS J204300.3+152114 20 43 00.36 +15 21 14.76 3.55 ROSAT
2RXS J204300.3+152114 20 43 00.36 +15 21 14.76 3.55 ROSAT
2E 2040.6+1510 20 43 01.34 +15 21 13.32 3.77 EINSTEIN
2E 2040.6+1510 20 43 01.37 +15 21 13.68 3.77 EINSTEIN
2 1RXS J204320.5+151202 20 43 20.50 +15 12 02.16 11.18 ROSAT
2RXS J204320.4+151200 20 43 20.47 +15 12 00.72 11.19 ROSAT
2RXS J204320.4+151200 20 43 20.47 +15 12 00.72 11.19 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J204259+152107 20 42 59.71 +15 21 07.92 3.37 NVSS
2 NVSS J204245+151455 20 42 45.89 +15 14 54.96 4.84 NVSS
3 AT Del 20 42 24.77 +15 20 15.72 5.38 GCVS
4 NVSS J204209+151800 20 42 09.50 +15 18 01.08 9.20 NVSS
5 HIP 102273 20 43 21.29 +15 11 45.24 11.51 HIPPARCOS
SAO 106424 20 43 21.34 +15 11 45.24 11.52 SAO
SAO 106424 20 43 21.34 +15 11 44.88 11.52 HIC
BD+14 4402 20 43 21.34 +15 11 44.88 11.52 ACRS
PPM 138899 20 43 21.34 +15 11 44.88 11.52 PPM
6 NVSS J204207+152611 20 42 07.20 +15 26 11.04 11.54 NVSS
7 WDS J20434+1512 20 43 24.00 +15 11 60.00 11.83 WDS
8 AS Del 20 42 17.16 +15 30 53.64 13.25 GCVS
TGSSADR J204158.5+152720 20 41 58.61 +15 27 20.88 13.92 GMRTAS150M
9 NVSS J204158+152719 20 41 58.51 +15 27 20.16 13.92 NVSS

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