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 J1631.8+4144

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1631.8+4144 Swift-XRT detections in the field for 4FGL J1631.8+4144

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 16 31 46.97 +41 46 29.41 4.76 (1.6 ± 0.3) x 10-2 53 6.146 6.319

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 32 29.30 +41 45 20.37 6.65 (3.3 ± 1.1) x 10-3 12 2.975 2.970
2 16 31 40.09 +41 53 47.16 6.78 (3.1 ± 1.1) x 10-3 13 2.826 2.874
3 16 32 13.58 +41 36 48.71 7.09 (2.4 ± 1.0) x 10-3 13 2.495 2.502

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1631.8+4144 Swift-XRT image with known radio, optical and UV sources for 4FGL J1631.8+4144

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXP J163147.2+414634 16 31 47.14 +41 46 34.68 1.65 ROSAT
2RXS J163147.2+414637 16 31 47.26 +41 46 37.56 1.69 ROSAT
2RXS J163147.2+414637 16 31 47.26 +41 46 37.56 1.69 ROSAT
1WGA J1631.7+4146 16 31 46.49 +41 46 36.84 1.71 ROSAT
2 1WGA J1632.1+4144 16 32 09.41 +41 45 21.24 3.83 ROSAT
3 1WGA J1631.2+4143 16 31 17.59 +41 44 34.44 5.86 ROSAT
4 1WGA J1632.4+4144 16 32 28.30 +41 45 29.16 7.36 ROSAT
2RXP J163229.3+414526 16 32 29.23 +41 45 25.92 7.53 ROSAT
5 1WGA J1632.3+4138 16 32 18.10 +41 38 45.96 8.25 ROSAT
2RXP J163219.4+413840 16 32 19.34 +41 38 39.84 8.48 ROSAT
6 1WGA J1632.6+4148 16 32 40.20 +41 49 30.36 10.57 ROSAT
7 1WGA J1632.2+4154 16 32 16.61 +41 55 03.00 11.32 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 QORG J163146.7+414632 16 31 46.70 +41 46 32.16 1.62 QORGCAT
2 PGC 2185634 16 31 35.21 +41 42 55.08 3.29 PGC2003
3 QORG J163210.0+414520 16 32 10.01 +41 45 20.16 3.94 QORGCAT
PGC 2184536 16 32 04.61 +41 39 01.08 6.63 PGC2003
4 NVSS J163206+413904 16 32 06.50 +41 39 03.96 6.74 NVSS
QORG J163218.2+414917 16 32 18.19 +41 49 17.04 6.95 QORGCAT
5 FIRST J163219.2+414909 16 32 19.20 +41 49 09.84 7.03 FIRST
6 SDSS J16324+4145 16 32 29.30 +41 45 23.04 7.54 VERONCAT
QORG J163229.3+414524 16 32 29.30 +41 45 24.12 7.54 QORGCAT
7 QORG J163140.8+415330 16 31 40.80 +41 53 30.12 8.66 QORGCAT
8 PGC 2183564 16 31 42.60 +41 35 36.96 9.43 PGC2003
FIRST J163145.8+415526 16 31 45.91 +41 55 26.04 10.48 FIRST
9 NVSS J163145+415528 16 31 45.91 +41 55 28.92 10.53 NVSS
TGSSADR J163146.0+415533 16 31 46.01 +41 55 32.88 10.60 GMRTAS150M
10 NVSS J163148+413406 16 31 48.70 +41 34 05.88 10.87 NVSS
FIRST J163148.8+413406 16 31 48.89 +41 34 05.88 10.87 FIRST
11 NVSS J163158+413408 16 31 58.39 +41 34 08.04 10.98 NVSS
FIRST J163158.0+413406 16 31 58.01 +41 34 05.88 10.99 FIRST
12 PGC 2189380 16 31 52.80 +41 55 58.08 11.02 PGC2003
13 QORG J163245.6+414146 16 32 45.60 +41 41 45.96 11.04 QORGCAT
WN 1630.1+4202 16 31 48.00 +41 56 08.16 11.17 WENSS
QORG J163211.7+415522 16 32 11.71 +41 55 22.08 11.23 QORGCAT
14 FIRST J163211.7+415521 16 32 11.71 +41 55 22.08 11.23 FIRST
7C 163009.9+420233 16 31 48.00 +41 56 13.92 11.26 UC7C151MHZ
VLSSr J163147.8+415615 16 31 47.81 +41 56 15.00 11.28 VLSSR
GB6 J1631+4156 16 31 48.60 +41 56 21.12 11.38 GB6
TXS 1630+420 16 31 49.99 +41 56 25.08 11.46 TEXAS
TGSSADR J163149.2+415628 16 31 49.20 +41 56 29.04 11.51 GMRTAS150M
15 NVSS J163149+415630 16 31 49.30 +41 56 30.12 11.53 NVSS
FIRST J163149.3+415630 16 31 49.39 +41 56 30.84 11.55 FIRST
16 PGC 2189441 16 32 18.10 +41 56 12.84 12.49 PGC2003

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