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 J1627.8+3217

Field

Detected Excesses

Swift-XRT image of the field for 3FGL J1627.8+3217 Swift-XRT detections in the field for 3FGL J1627.8+3217

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 16 27 43.00 +32 21 02.43 4.46 (1.01 ± 0.13) x 10-2 70 7.546 7.493
2 16 28 00.19 +32 24 16.73 4.95 (5.9 ± 1.0) x 10-3 41 5.851 5.976
3 16 27 18.84 +32 28 00.74 4.95 (3.0 ± 0.8) x 10-3 25 4.056 3.681

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 16 27 09.06 +32 24 11.19 5.31 (1.8 ± 0.6) x 10-3 22 3.103 2.829
2 16 27 31.33 +32 17 57.82 6.52 (1.3 ± 0.5) x 10-3 12 2.531 2.612
3 16 26 50.23 +32 19 43.17 6.04 (1.4 ± 0.5) x 10-3 12 2.795 2.610
4 16 28 01.14 +32 16 42.48 6.21 (1.4 ± 0.6) x 10-3 16 2.749 2.442
5 16 27 33.12 +32 27 05.55 5.64 (1.3 ± 0.6) x 10-3 13 2.465 2.257

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 3FGL J1627.8+3217 Swift-XRT image with known radio, optical and UV sources for 3FGL J1627.8+3217

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J162744.9+322034 16 27 44.93 +32 20 34.44 3.07 ROSAT
2RXS J162744.9+322034 16 27 44.93 +32 20 34.44 3.07 ROSAT
1RXS J162745.0+322035 16 27 45.00 +32 20 35.16 3.08 ROSAT
2 SWIFT J162742.9+322100 16 27 42.96 +32 21 00.72 3.67 SWIFT
3 SWIFT J162800.3+322413 16 28 00.31 +32 24 13.32 6.52 SWIFT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J162745+321715 16 27 45.60 +32 17 16.08 1.57 NVSS
FIRST J162745.2+321712 16 27 45.29 +32 17 12.84 1.65 FIRST
WN 1625.3+3223 16 27 15.79 +32 16 55.92 7.78 WENSS
FIRST J162715.3+321652 16 27 15.29 +32 16 53.04 7.89 FIRST
2 NVSS J162715+321654 16 27 15.29 +32 16 54.12 7.90 NVSS
TGSSADR J162715.2+321653 16 27 15.29 +32 16 53.04 7.90 GMRTAS150M
3 FIRST J162827.2+322052 16 28 27.29 +32 20 52.08 7.95 FIRST
4 MITG J1627+3224 16 27 32.11 +32 24 56.16 8.21 MITGB6CM
5 NVSS J162808+321013 16 28 08.21 +32 10 13.08 8.40 NVSS
FIRST J162809.3+321013 16 28 09.31 +32 10 13.08 8.50 FIRST
6 FIRST J162823.5+322337 16 28 23.50 +32 23 38.04 8.71 FIRST
7 FIRST J162844.4+321932 16 28 44.40 +32 19 32.16 11.12 FIRST
8 FIRST J162801.4+320645 16 28 01.49 +32 06 46.08 11.33 FIRST
9 MITG J1627+3227 16 27 17.40 +32 27 24.84 12.02 MITGB6CM

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