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 J1921.1+1930

Field

Detected Excesses

Swift-XRT image of the field for 4FGL J1921.1+1930 Swift-XRT detections in the field for 4FGL J1921.1+1930

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 19 21 13.92 +19 40 04.47 4.11 (1.5 ± 0.2) x 10-2 109 9.763 9.556

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 19 20 52.09 +19 37 53.55 5.31 (1.4 ± 0.5) x 10-3 19 2.994 2.985
2 19 21 49.91 +19 32 10.43 5.76 (9 ± 4) x 10-4 14 2.485 2.370

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1921.1+1930 Swift-XRT image with known radio, optical and UV sources for 4FGL J1921.1+1930

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 XMMSL2 J192114.0+194000 19 21 13.97 +19 39 59.76 9.34 XMM-NEWTON
1RXS J192115.9+193957 19 21 15.91 +19 39 57.60 9.35 ROSAT
2RXS J192115.4+194002 19 21 15.48 +19 40 02.28 9.42 ROSAT
2 Unknown 19 21 16.15 +19 40 09.48 9.56 EINSTEIN
2E 1919.0+1934 19 21 16.15 +19 40 09.48 9.56 EINSTEIN
2E 1919.0+1934 19 21 16.20 +19 40 09.84 9.56 EINSTEIN

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 OP Vul 19 21 04.15 +19 32 54.60 2.64 GCVS
TGSSADR J192045.4+193623 19 20 45.41 +19 36 23.04 8.16 GMRTAS150M
CGPS J192045+193623 19 20 45.29 +19 36 24.12 8.18 CGPSNGPCAT
2 NVSS J192045+193623 19 20 45.29 +19 36 23.04 8.18 NVSS
3 HD 349973 19 21 44.11 +19 26 07.44 9.20 HDEC
4 SAO 104740 19 20 30.84 +19 27 50.40 9.73 SAO
PPM 136142 19 20 30.79 +19 27 51.12 9.73 PPM
BD+19 3981 19 20 30.79 +19 27 50.76 9.74 ACRS
5 NVSS J192028+192952 19 20 28.51 +19 29 53.16 9.88 NVSS
CGPS J192100+191907 19 21 00.91 +19 19 08.04 11.78 CGPSNGPCAT
6 NVSS J192119+191857 19 21 19.61 +19 18 57.96 11.94 NVSS
7 NVSS J192101+191856 19 21 01.20 +19 18 56.88 11.95 NVSS
8 BD+19 3982 19 20 32.86 +19 39 10.80 12.23 ACRS
PPM 136144 19 20 32.88 +19 39 11.52 12.23 PPM

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