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 J1735.2-1640

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1735.2-1640 Swift-XRT detections in the field for 4FGL J1735.2-1640

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 17 34 57.49 -16 48 01.21 4.21 (1.4 ± 0.3) x 10-2 62 4.585 4.246
2 17 34 57.87 -16 45 18.27 4.18 (1.3 ± 0.3) x 10-2 71 4.690 4.003
3 17 34 36.13 -16 46 56.05 4.25 (1.2 ± 0.3) x 10-2 53 4.450 3.976
4 17 34 54.25 -16 40 54.66 4.21 (1.3 ± 0.3) x 10-2 77 4.106 3.949
5 17 34 55.84 -16 49 44.01 4.43 (1.2 ± 0.3) x 10-2 39 4.010 3.915
6 17 34 56.00 -16 42 15.47 4.27 (1.2 ± 0.3) x 10-2 61 4.475 3.857
7 17 34 50.49 -16 38 51.19 4.22 (1.1 ± 0.3) x 10-2 66 4.006 3.715
8 17 35 03.91 -16 49 56.46 4.72 (9 ± 3) x 10-3 34 3.207 3.511
9 17 34 57.58 -16 44 28.07 4.17 (1.0 ± 0.3) x 10-2 61 4.136 3.492
10 17 34 45.34 -16 43 50.98 4.09 (1.0 ± 0.3) x 10-2 80 4.733 3.395
11 17 35 06.00 -16 44 11.36 4.61 (9 ± 3) x 10-3 47 3.361 3.394
12 17 34 45.39 -16 49 01.82 4.38 (9 ± 3) x 10-3 42 3.503 3.318
13 17 34 46.61 -16 47 14.62 4.14 (9 ± 3) x 10-3 64 4.367 3.142
14 17 35 04.21 -16 41 51.38 4.55 (8 ± 3) x 10-3 51 3.235 3.127
15 17 34 34.01 -16 43 31.25 4.00 (1.1 ± 0.3) x 10-2 78 3.826 3.095
16 17 35 02.51 -16 39 55.10 4.40 (8 ± 3) x 10-3 65 3.237 3.023

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 17 34 57.85 -16 45 18.27 4.18 (1.1 ± 0.3) x 10-2 69 4.365 3.577
2 17 34 50.50 -16 38 51.87 4.22 (1.0 ± 0.3) x 10-2 67 4.103 3.546
3 17 34 54.11 -16 40 50.64 4.20 (9 ± 3) x 10-3 80 3.605 3.162
4 17 34 32.90 -16 42 25.75 4.01 (9 ± 3) x 10-3 70 4.733 2.999
5 17 34 45.84 -16 48 09.76 4.20 (9 ± 3) x 10-3 53 3.768 2.965
6 17 34 42.10 -16 36 19.96 4.41 (7 ± 2) x 10-3 45 3.482 2.961
7 17 34 26.51 -16 39 58.22 4.17 (9 ± 3) x 10-3 49 3.650 2.957
8 17 35 00.43 -16 38 46.97 4.41 (8 ± 3) x 10-3 48 3.028 2.956
9 17 34 45.34 -16 43 51.02 4.09 (8 ± 3) x 10-3 80 3.699 2.924
10 17 34 32.68 -16 37 43.11 4.20 (8 ± 3) x 10-3 56 3.514 2.918
11 17 34 46.50 -16 45 54.31 4.17 (8 ± 3) x 10-3 58 3.651 2.885
12 17 34 56.32 -16 49 05.84 4.20 (8 ± 3) x 10-3 40 3.501 2.797
13 17 34 56.19 -16 42 21.70 4.27 (7 ± 3) x 10-3 62 3.866 2.790
14 17 34 35.80 -16 44 49.96 4.03 (8 ± 3) x 10-3 77 4.452 2.751
15 17 35 06.22 -16 46 31.20 4.66 (6 ± 2) x 10-3 41 2.742 2.735
16 17 34 39.51 -16 40 13.71 4.05 (7 ± 3) x 10-3 80 4.935 2.722
17 17 34 31.99 -16 37 36.92 4.27 (6 ± 2) x 10-3 56 3.214 2.706
18 17 34 45.45 -16 37 06.60 4.18 (7 ± 3) x 10-3 54 3.889 2.674
19 17 35 06.00 -16 44 11.36 4.61 (7 ± 3) x 10-3 48 2.742 2.661
20 17 34 45.54 -16 44 06.67 4.07 (8 ± 3) x 10-3 79 4.733 2.657
21 17 34 34.01 -16 43 31.25 4.00 (8 ± 3) x 10-3 78 5.318 2.648
22 17 34 46.51 -16 45 54.45 4.17 (1.1 ± 0.4) x 10-2 58 4.227 2.628
23 17 34 41.52 -16 40 42.60 4.03 (8 ± 3) x 10-3 73 3.432 2.614
24 17 35 02.51 -16 39 55.14 4.40 (6 ± 2) x 10-3 65 3.090 2.564
25 17 34 36.10 -16 46 11.69 4.15 (7 ± 3) x 10-3 51 3.866 2.538
26 17 35 05.36 -16 48 30.33 4.56 (6 ± 2) x 10-3 40 2.742 2.506
27 17 34 32.45 -16 37 36.13 4.24 (6 ± 3) x 10-3 53 2.905 2.487
28 17 34 58.46 -16 37 43.33 4.55 (5 ± 2) x 10-3 42 2.685 2.455
29 17 34 29.85 -16 41 16.04 4.03 (7 ± 3) x 10-3 67 3.676 2.425
30 17 34 55.96 -16 42 11.99 4.26 (6 ± 2) x 10-3 61 3.470 2.416
31 17 34 57.64 -16 46 25.31 4.19 (6 ± 3) x 10-3 60 2.742 2.390
32 17 34 35.13 -16 44 15.09 3.99 (7 ± 3) x 10-3 82 4.619 2.384
33 17 34 57.83 -16 45 16.87 4.18 (6 ± 3) x 10-3 74 3.216 2.373
34 17 34 36.12 -16 38 54.77 4.07 (6 ± 3) x 10-3 59 3.636 2.311
35 17 34 46.61 -16 47 14.62 4.14 (6 ± 3) x 10-3 65 2.744 2.273
36 17 34 32.82 -16 42 20.85 4.02 (6 ± 3) x 10-3 68 3.806 2.264
37 17 34 56.32 -16 49 05.84 4.20 (6 ± 3) x 10-3 40 3.361 2.241
38 17 34 46.61 -16 47 14.62 4.14 (6 ± 3) x 10-3 64 4.137 2.174
39 17 34 57.87 -16 45 18.27 4.18 (5 ± 3) x 10-3 71 3.501 2.171
40 17 34 35.89 -16 44 51.77 4.03 (5 ± 3) x 10-3 74 3.471 2.153
41 17 34 29.85 -16 41 16.04 4.03 (5 ± 3) x 10-3 67 3.931 2.113
42 17 34 50.50 -16 38 51.87 4.22 (5 ± 2) x 10-3 67 3.180 2.062
43 17 34 50.49 -16 38 51.19 4.22 (5 ± 3) x 10-3 66 3.205 1.955
44 17 34 39.13 -16 40 05.67 4.06 (5 ± 3) x 10-3 79 3.205 1.874
45 17 35 04.21 -16 41 51.37 4.55 (4 ± 2) x 10-3 50 2.739 1.866
46 17 34 31.22 -16 41 44.26 4.01 (5 ± 3) x 10-3 62 3.110 1.851
47 17 34 57.49 -16 48 01.13 4.21 (4 ± 2) x 10-3 62 2.742 1.724
48 17 34 43.22 -16 41 28.60 4.12 (4 ± 2) x 10-3 61 3.110 1.673
49 17 34 26.43 -16 39 53.07 4.21 (3 ± 2) x 10-3 48 3.087 1.632
50 17 34 34.01 -16 43 31.25 4.00 (3 ± 3) x 10-3 79 3.260 1.365
51 17 34 45.57 -16 44 27.91 4.10 (1 ± 160) x 10-5 69 4.865 0.007

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1735.2-1640 Swift-XRT image with known radio, optical and UV sources for 4FGL J1735.2-1640

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J173539.8-163143 17 35 39.86 -16 31 43.32 10.59 ROSAT
2 2RXS J173543.5-165154 17 35 43.56 -16 51 54.72 14.07 ROSAT
1RXS J173543.8-165155 17 35 43.80 -16 51 55.44 14.11 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J173519-163350 17 35 19.80 -16 33 51.12 6.41 NVSS
TGSSADR J173519.9-163348 17 35 19.90 -16 33 48.96 6.46 GMRTAS150M
2 PPM 233269 17 34 46.99 -16 37 26.04 6.59 PPM
HD 159320 17 34 46.99 -16 37 26.04 6.59 HIC
BD-16 4554 17 34 46.99 -16 37 26.04 6.59 ACRS
SAO 160650 17 34 46.97 -16 37 26.04 6.59 SAO
HIP 86023 17 34 46.97 -16 37 25.68 6.59 HIPPARCOS
TGSSADR J173533.9-163443 17 35 34.01 -16 34 44.04 7.40 GMRTAS150M
3 NVSS J173533-163442 17 35 33.89 -16 34 42.96 7.40 NVSS
4 PPM 718354 17 34 42.43 -16 38 00.96 7.43 PPM
TGSSADR J173522.5-164739 17 35 22.61 -16 47 39.12 8.04 GMRTAS150M
5 NVSS J173522-164740 17 35 22.61 -16 47 39.84 8.05 NVSS
6 NVSS J173544-164248 17 35 45.00 -16 42 47.88 8.30 NVSS
7 NVSS J173441-163255 17 34 41.50 -16 32 56.04 10.22 NVSS
8 NVSS J173525-162924 17 35 25.70 -16 29 24.00 11.07 NVSS
9 CGMW 3-83 17 34 36.17 -16 30 03.24 13.19 CGMW
PGC 200467 17 34 36.10 -16 30 02.88 13.20 PGC2003

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