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 J1921.6+1934

Field

Detected Excesses
Swift-XRT image of the field for 3FGL J1921.6+1934 Swift-XRT detections in the field for 3FGL J1921.6+1934

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 04.29 4.14 (1.4 ± 0.2) x 10-2 107 9.518 9.363

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 52.77 +19 37 57.64 5.35 (1.2 ± 0.5) x 10-3 18 2.946 2.720
2 19 21 49.43 +19 32 08.67 5.89 (9 ± 4) x 10-4 17 2.460 2.237

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 3FGL J1921.6+1934 Swift-XRT image with known radio, optical and UV sources for 3FGL J1921.6+1934

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1RXS J192115.9+193957 19 21 15.91 +19 39 57.60 7.22 ROSAT
1 2E 1919.0+1934 19 21 16.20 +19 40 09.84 7.32 EINSTEIN
null 19 21 16.15 +19 40 09.48 7.32 EINSTEIN
2E 1919.0+1934 19 21 16.15 +19 40 09.48 7.32 EINSTEIN
2RXS J192115.4+194002 19 21 15.48 +19 40 02.28 7.35 ROSAT
2 XMMSL2 J192114.0+194000 19 21 13.97 +19 39 59.76 7.58 XMM-NEWTON

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
CGPS J192123+194641 19 21 23.50 +19 46 41.88 12.28 CGPSNGPCAT
1 NVSS J192123+194646 19 21 23.50 +19 46 45.84 12.35 NVSS
2 NVSS J192218+194355 19 22 18.19 +19 43 54.84 13.15 NVSS
TGSSADR J192218.2+194355 19 22 18.31 +19 43 54.84 13.16 GMRTAS150M
CGPS J192218+194358 19 22 18.19 +19 43 59.16 13.18 CGPSNGPCAT
CGPS J192207+192304 19 22 07.70 +19 23 03.84 13.76 CGPSNGPCAT
3 NVSS J192207+192259 19 22 07.80 +19 22 59.16 13.85 NVSS

Penn State University Goddard Space Flight Center Swift