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 J1645.0+1654

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1645.0+1654 Swift-XRT detections in the field for 4FGL J1645.0+1654

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 16 44 59.69 +16 55 10.50 4.30 (2.1 ± 0.3) x 10-2 87 7.925 7.793
2 16 44 33.35 +16 46 23.91 4.36 (7 ± 2) x 10-3 37 4.423 3.593
3 16 45 14.97 +16 46 04.40 4.90 (4.0 ± 1.3) x 10-3 31 3.123 3.210
4 16 45 18.10 +16 51 56.38 4.60 (5 ± 2) x 10-3 46 2.841 3.077
5 16 45 04.18 +16 50 14.19 4.61 (5 ± 2) x 10-3 43 3.020 3.051

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 45 20.03 +17 02 06.01 5.00 (3.5 ± 1.2) x 10-3 28 3.191 2.910
2 16 45 03.58 +16 49 59.71 4.64 (4 ± 2) x 10-3 42 2.772 2.773
3 16 44 43.89 +16 47 43.62 4.64 (3.9 ± 1.4) x 10-3 32 3.156 2.763
4 16 44 39.25 +16 47 07.45 4.74 (4 ± 2) x 10-3 24 2.589 2.672
5 16 45 43.48 +16 54 54.25 5.08 (3.1 ± 1.2) x 10-3 30 2.930 2.667
6 16 45 18.21 +16 51 57.47 4.56 (3.9 ± 1.4) x 10-3 44 2.830 2.658
7 16 45 04.61 +16 58 33.27 5.64 (3.5 ± 1.3) x 10-3 23 2.495 2.653
8 16 45 09.31 +16 50 46.30 4.63 (4 ± 2) x 10-3 42 3.428 2.649
9 16 44 29.22 +16 50 33.28 5.20 (3.2 ± 1.2) x 10-3 23 2.773 2.641
10 16 45 17.41 +16 51 46.74 4.59 (4 ± 2) x 10-3 44 2.729 2.576
11 16 44 31.04 +16 54 12.12 5.44 (2.9 ± 1.1) x 10-3 18 2.595 2.574
12 16 45 48.29 +16 55 32.34 5.70 (3.0 ± 1.2) x 10-3 16 2.427 2.563
13 16 44 32.45 +16 46 12.50 4.40 (2.8 ± 1.2) x 10-3 39 2.830 2.342
14 16 44 33.99 +16 46 30.62 4.45 (3.0 ± 1.3) x 10-3 42 3.176 2.328
15 16 44 57.74 +16 49 24.93 4.51 (3 ± 2) x 10-3 29 2.689 2.287
16 16 45 43.48 +16 54 54.26 5.08 (2.7 ± 1.2) x 10-3 30 2.754 2.254

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1645.0+1654 Swift-XRT image with known radio, optical and UV sources for 4FGL J1645.0+1654

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 XMMSL2 J164459.6+165515 16 44 59.59 +16 55 14.52 1.49 XMM-NEWTON
XMMSL2 J164459.6+165515 16 44 59.59 +16 55 14.52 1.49 XMM-NEWTON
1WGA J1644.9+1655 16 44 59.21 +16 55 19.92 1.62 ROSAT
2RXP J164459.6+165542 16 44 59.54 +16 55 42.60 1.83 ROSAT
2 XMMSL2 J164501.4+165813 16 45 01.37 +16 58 12.72 3.99 XMM-NEWTON
XMMSL2 J164501.4+165813 16 45 01.37 +16 58 12.72 3.99 XMM-NEWTON
3 1WGA J1645.2+1657 16 45 16.20 +16 57 24.84 4.22 ROSAT
4 1WGA J1645.0+1659 16 45 03.19 +16 59 08.16 4.86 ROSAT
5 1WGA J1645.5+1655 16 45 32.11 +16 55 15.60 6.70 ROSAT
6 1WGA J1644.5+1651 16 44 35.50 +16 51 12.24 7.56 ROSAT
7 1WGA J1645.2+1701 16 45 13.51 +17 01 47.64 7.82 ROSAT
8 1RXS J164454.9+164228 16 44 54.91 +16 42 28.44 12.03 ROSAT
9 1WGA J1644.4+1705 16 44 26.40 +17 05 31.20 14.44 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J164500+165510 16 45 00.10 +16 55 09.84 1.36 NVSS
QORG J164459.8+165512 16 44 59.81 +16 55 12.00 1.42 QORGCAT
FIRST J164459.7+165512 16 44 59.81 +16 55 12.00 1.43 FIRST
2 FIRST J164448.4+165800 16 44 48.50 +16 58 00.12 5.31 FIRST
FIRST J164443.5+165219 16 44 43.61 +16 52 18.84 5.35 FIRST
3 NVSS J164443+165203 16 44 43.90 +16 52 04.08 5.37 NVSS
TGSSADR J164443.2+165220 16 44 43.30 +16 52 19.92 5.41 GMRTAS150M
4 FIRST J164453.9+165910 16 44 54.00 +16 59 11.04 5.48 FIRST
5 FIRST J164443.7+165834 16 44 43.80 +16 58 33.96 6.52 FIRST
6 NVSS J164531+165838 16 45 31.39 +16 58 37.92 7.78 NVSS
7 PGC 1523067 16 45 10.10 +17 02 13.92 8.06 PGC2003
FIRST J164528.2+170002 16 45 28.20 +17 00 02.16 8.10 FIRST
8 NVSS J164528+170004 16 45 28.20 +17 00 05.04 8.12 NVSS
TGSSADR J164440.2+164822 16 44 40.20 +16 48 23.04 8.27 GMRTAS150M
9 NVSS J164440+164820 16 44 40.30 +16 48 20.88 8.28 NVSS
FIRST J164440.1+164821 16 44 40.20 +16 48 21.96 8.28 FIRST
10 PGC 1517155 16 44 42.00 +16 47 38.04 8.54 PGC2003
11 FIRST J164442.0+164652 16 44 42.00 +16 46 53.04 9.14 FIRST
12 FIRST J164429.3+165037 16 44 29.40 +16 50 36.96 9.14 FIRST
QORG J164441.9+164654 16 44 41.90 +16 46 54.12 9.14 QORGCAT
13 SAO 102360 16 44 44.62 +17 02 34.08 9.53 SAO
PPM 132625 16 44 44.62 +17 02 35.16 9.55 PPM
BD+17 3081 16 44 44.62 +17 02 35.16 9.55 ACRS
HD 151122 16 44 44.59 +17 02 35.16 9.55 HIC
HIP 81974 16 44 44.62 +17 02 35.16 9.55 HIPPARCOS
14 NVSS J164534+170045 16 45 34.61 +17 00 45.00 9.71 NVSS
15 FIRST J164430.9+170009 16 44 31.01 +17 00 09.00 9.91 FIRST
16 FIRST J164436.2+170142 16 44 36.19 +17 01 42.96 10.02 FIRST
17 PGC 1521384 16 44 25.10 +16 58 08.04 10.15 PGC2003
18 FIRST J164518.8+170403 16 45 18.91 +17 04 04.08 10.37 FIRST
19 NVSS J164416+165351 16 44 16.90 +16 53 51.00 11.36 NVSS
20 NVSS J164417+164926 16 44 17.71 +16 49 27.12 12.16 NVSS
FIRST J164417.5+164926 16 44 17.50 +16 49 26.04 12.21 FIRST
21 QORG J164427.7+170538 16 44 27.70 +17 05 38.04 14.34 QORGCAT
22 PGC 1515243 16 45 41.81 +16 42 51.12 14.53 PGC2003
23 NVSS J164418+170506 16 44 18.60 +17 05 06.00 15.39 NVSS

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