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 J2105.9+7508

Field

Detected Excesses

Swift-XRT image of the field for 4FGL J2105.9+7508 Swift-XRT detections in the field for 4FGL J2105.9+7508

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 21 04 21.06 +75 04 04.56 4.30 (1.3 ± 0.2) x 10-2 85 8.440 8.562
2 21 06 06.43 +75 09 24.02 4.78 (7.4 ± 1.1) x 10-3 56 6.429 6.429
3 21 04 51.20 +75 12 39.64 6.65 (2.1 ± 0.6) x 10-3 16 2.642 3.362

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 07 05.91 +75 14 23.73 6.12 (1.6 ± 0.6) x 10-3 15 2.783 2.845
2 21 08 18.71 +75 10 06.26 6.21 (6 ± 4) x 10-4 10 2.482 1.451

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 4FGL J2105.9+7508 Swift-XRT image with known radio, optical and UV sources for 4FGL J2105.9+7508

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1RXS J210617.7+750810 21 06 17.71 +75 08 09.96 1.51 ROSAT
2RXS J210618.2+750801 21 06 18.24 +75 08 01.32 1.59 ROSAT
2RXS J210618.2+750801 21 06 18.24 +75 08 01.32 1.59 ROSAT
2 Unknown 21 04 20.59 +75 04 03.36 7.64 ROSAT
2RXS J210419.5+750400 21 04 19.58 +75 04 00.12 7.73 ROSAT
2RXS J210419.5+750400 21 04 19.58 +75 04 00.12 7.73 ROSAT
1RXS J210419.0+750359 21 04 19.01 +75 03 59.04 7.77 ROSAT
1RXS J210419.0+750359 21 04 19.01 +75 03 59.04 7.77 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J210606+750926 21 06 06.70 +75 09 25.92 1.05 NVSS
2 NVSS J210605+750441 21 06 05.81 +75 04 41.16 4.03 NVSS
3 NVSS J210710+750501 21 07 10.90 +75 05 02.04 6.05 NVSS
4 NVSS J210459+750252 21 04 59.90 +75 02 52.08 6.81 NVSS
5 NVSS J210746+751024 21 07 46.30 +75 10 24.96 7.31 NVSS
6 WDS J21057+7501 21 05 42.00 +75 01 00.12 7.71 WDS
WN 2107.5+7507 21 07 14.21 +75 20 00.96 12.41 WENSS
7 NVSS J210715+752005 21 07 15.10 +75 20 04.92 12.50 NVSS
8C 2109+748 21 08 54.60 +75 01 09.12 13.76 RRS8C38MHZ
VLSSr J210900.5+750126 21 09 00.60 +75 01 26.04 13.93 VLSSR
WN 2109.2+7448 21 08 58.30 +75 01 09.84 13.95 WENSS
TGSSADR J210859.0+750111 21 08 58.99 +75 01 10.92 13.98 GMRTAS150M
8 NVSS J210859+750109 21 08 59.50 +75 01 09.84 14.02 NVSS
TGSSADR J210316.5+745700 21 03 16.51 +74 57 00.00 15.53 GMRTAS150M
[PGB2011] J2103+7456 21 03 16.70 +74 56 57.12 15.56 CRATESOCRAP
CRATES J210318+745647 21 03 16.70 +74 56 57.12 15.56 CRATES
9 NVSS J210316+745656 21 03 16.70 +74 56 57.12 15.57 NVSS
QORG J210316.6+745656 21 03 16.61 +74 56 56.04 15.58 QORGCAT
2103+7444 21 03 17.40 +74 56 52.08 15.59 NORTH6CM
WN 2103.5+7445 21 03 12.31 +74 57 09.00 15.60 WENSS
GB6 J2103+7456 21 03 18.19 +74 56 47.04 15.62 GB6

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