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.

3FGL J2142.7+1957

Field

Detected Excesses

Swift-XRT image of the field for 3FGL J2142.7+1957 Swift-XRT detections in the field for 3FGL J2142.7+1957

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 21 42 47.47 +19 58 11.92 4.29 (3.2 ± 0.3) x 10-2 99 9.075 9.338
2 21 42 29.23 +19 54 14.50 4.74 (8 ± 2) x 10-3 38 5.185 4.547

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 21 43 28.83 +19 57 57.74 6.41 (2.4 ± 0.9) x 10-3 13 2.704 2.680
2 21 42 28.22 +19 59 57.93 6.12 (2.7 ± 1.1) x 10-3 14 2.420 2.441

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 3FGL J2142.7+1957 Swift-XRT image with known radio, optical and UV sources for 3FGL J2142.7+1957

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 XMMSL2 J214247.5+195806 21 42 47.42 +19 58 05.52 1.10 XMM-NEWTON
XMMSL2 J214247.5+195806 21 42 47.42 +19 58 05.52 1.10 XMM-NEWTON
XMMSL2 J214247.5+195806 21 42 47.23 +19 58 16.32 1.18 XMM-NEWTON
XMMSL2 J214247.5+195806 21 42 47.57 +19 58 24.60 1.33 XMM-NEWTON
2 2RXS J214227.8+195946 21 42 27.84 +19 59 47.04 4.38 ROSAT
2RXS J214227.8+195946 21 42 27.84 +19 59 47.04 4.38 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J214247+195810 21 42 47.40 +19 58 09.84 1.14 NVSS
2 NVSS J214237+195607 21 42 37.51 +19 56 07.08 1.96 NVSS
TGSSADR J214229.7+195444 21 42 29.81 +19 54 45.00 4.23 GMRTAS150M
3 NVSS J214229+195438 21 42 29.30 +19 54 38.88 4.38 NVSS
4 NVSS J214309+195058 21 43 09.00 +19 50 58.92 8.80 NVSS
TGSSADR J214309.1+195057 21 43 09.10 +19 50 57.84 8.83 GMRTAS150M
5 GLEAM J214310+195033 21 43 10.30 +19 50 33.00 9.32 GLEAMEGCAT
6 NVSS J214212+200421 21 42 12.41 +20 04 21.00 10.08 NVSS
TGSSADR J214212.2+200419 21 42 12.31 +20 04 19.92 10.08 GMRTAS150M
7 NVSS J214232+200711 21 42 32.21 +20 07 10.92 10.10 NVSS
TGSSADR J214311.6+194922 21 43 11.71 +19 49 23.16 10.43 GMRTAS150M
8 NVSS J214311+194922 21 43 11.81 +19 49 22.08 10.44 NVSS
9 NVSS J214328+195429 21 43 28.39 +19 54 29.88 10.93 NVSS
10 NVSS J214332+195833 21 43 32.69 +19 58 33.96 11.59 NVSS
11 NVSS J214250+200908 21 42 50.11 +20 09 07.92 11.78 NVSS
TGSSADR J214250.1+200910 21 42 50.11 +20 09 10.08 11.82 GMRTAS150M
TGSSADR J214202.0+200442 21 42 01.99 +20 04 42.96 12.17 GMRTAS150M
12 NVSS J214202+200442 21 42 01.99 +20 04 41.88 12.18 NVSS
13 NVSS J214333+195333 21 43 33.50 +19 53 34.08 12.36 NVSS
14 NVSS J214333+200109 21 43 33.89 +20 01 09.12 12.38 NVSS
GLEAM J214201+200453 21 42 01.30 +20 04 54.12 12.42 GLEAMEGCAT
15 NVSS J214153+200202 21 41 53.50 +20 02 03.12 12.64 NVSS
16 NVSS J214200+194915 21 42 00.91 +19 49 14.88 12.97 NVSS
17 NVSS J214152+200834 21 41 52.61 +20 08 35.16 16.36 NVSS

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