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.

1FGL J1620.8-4928c

Field

Detected Excesses

Swift-XRT image of the field for 1FGL J1620.8-4928c Swift-XRT detections in the field for 1FGL J1620.8-4928c

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 16 19 32.14 -49 44 33.05 4.18 (1.05 ± 0.11) x 10-2 101 9.642 9.648
2 16 20 56.23 -49 32 25.84 4.28 (3.3 ± 0.8) x 10-3 76 4.977 4.382

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 21 36.49 -49 27 49.10 4.29 (1.9 ± 0.7) x 10-3 54 3.684 2.954
2 16 21 06.56 -49 22 41.30 4.46 (1.6 ± 0.6) x 10-3 43 2.888 2.717
3 16 20 50.79 -49 33 53.91 4.41 (1.7 ± 0.6) x 10-3 42 3.202 2.681
4 16 21 12.47 -49 24 53.63 4.35 (1.6 ± 0.6) x 10-3 61 2.731 2.663
5 16 20 19.42 -49 34 45.77 4.26 (1.4 ± 0.6) x 10-3 41 3.059 2.519
6 16 20 43.82 -49 36 17.62 4.52 (1.3 ± 0.5) x 10-3 38 2.666 2.498
7 16 20 54.86 -49 25 53.46 4.35 (1.5 ± 0.6) x 10-3 53 2.865 2.443
8 16 21 29.78 -49 20 50.64 4.57 (1.1 ± 0.5) x 10-3 39 2.651 2.429
9 16 21 29.20 -49 26 42.78 4.55 (1.3 ± 0.6) x 10-3 34 2.703 2.429
10 16 19 50.46 -49 32 10.60 4.48 (1.2 ± 0.5) x 10-3 24 2.858 2.311
11 16 20 25.13 -49 17 10.54 4.74 (1.0 ± 0.5) x 10-3 24 2.805 2.273
12 16 20 43.42 -49 36 16.76 4.52 (1.1 ± 0.5) x 10-3 37 2.659 2.239
13 16 21 37.47 -49 28 00.83 4.31 (1.1 ± 0.5) x 10-3 55 2.999 2.161
14 16 21 25.32 -49 30 18.40 4.33 (1.2 ± 0.6) x 10-3 44 2.970 2.158
15 16 21 24.88 -49 30 19.41 4.33 (1.3 ± 0.6) x 10-3 48 2.636 2.157
16 16 21 10.05 -49 26 45.60 4.38 (1.1 ± 0.6) x 10-3 48 2.654 1.970
17 16 21 07.15 -49 32 42.15 4.28 (1.0 ± 0.5) x 10-3 60 3.691 1.904
18 16 20 08.44 -49 35 36.16 4.35 (8 ± 5) x 10-4 46 2.714 1.781
19 16 21 07.15 -49 32 42.12 4.28 (9 ± 5) x 10-4 57 2.840 1.675

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 1FGL J1620.8-4928c Swift-XRT image with known radio, optical and UV sources for 1FGL J1620.8-4928c

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2XMMi J162109.3-493045 16 21 09.31 -49 30 45.36 3.57 XMM-NEWTON
2 2XMMi J162057.2-493222 16 20 57.22 -49 32 21.84 3.93 XMM-NEWTON
3 2XMMi J162110.2-492508 16 21 10.27 -49 25 08.04 4.50 XMM-NEWTON
4 2XMMi J162038.0-493315 16 20 38.11 -49 33 15.12 5.24 XMM-NEWTON
5 2XMMi J162050.8-493401 16 20 50.90 -49 34 01.56 5.50 XMM-NEWTON
6 2XMMi J162012.7-493110 16 20 12.72 -49 31 10.92 6.92 XMM-NEWTON
7 2XMMi J162137.1-492841 16 21 37.15 -49 28 41.16 7.32 XMM-NEWTON
8 AX J162125-4933 16 21 25.44 -49 33 43.20 7.50 ASCA
9 2XMMi J162141.6-492741 16 21 41.64 -49 27 41.40 8.09 XMM-NEWTON
10 2XMMi J162133.9-493308 16 21 33.94 -49 33 08.64 8.21 XMM-NEWTON
11 2XMMi J162019.2-493454 16 20 19.20 -49 34 54.12 8.31 XMM-NEWTON
12 2XMMi J162145.7-493028 16 21 45.72 -49 30 28.08 8.92 XMM-NEWTON
13 2XMMi J162144.3-493150 16 21 44.35 -49 31 50.88 9.11 XMM-NEWTON
14 AX J162138-4934 16 21 38.16 -49 34 26.40 9.53 ASCA
15 2XMMi J162049.6-493910 16 20 49.63 -49 39 10.80 10.66 XMM-NEWTON
16 2XMMi J162120.5-493832 16 21 20.57 -49 38 31.92 11.02 XMM-NEWTON
17 2XMMi J162203.3-492424 16 22 03.36 -49 24 24.12 12.30 XMM-NEWTON
18 1RXS J162124.4-491717 16 21 24.41 -49 17 17.16 12.41 ROSAT
19 2XMMi J162156.4-493834 16 21 56.47 -49 38 34.80 14.49 XMM-NEWTON
2XMMi J162159.3-493835 16 21 59.33 -49 38 35.88 14.84 XMM-NEWTON
20 AX J162155-4939 16 21 55.20 -49 40 01.20 15.38 ASCA

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 HD 330677 16 20 57.12 -49 27 19.44 1.46 HDEC
2 HD 330678 16 20 54.84 -49 31 24.96 2.92 HDEC
3 146840 16 20 34.70 -49 30 26.64 3.41 WACKERLING
PPM 761850 16 20 34.54 -49 30 32.04 3.49 PPM
4 NSV 20585 16 21 12.00 -49 33 24.12 5.84 GCVSNSVARS
5 MGPS J162014-492955 16 20 14.21 -49 29 54.96 6.31 MGPS2
6 PPM 321627 16 21 42.12 -49 28 40.08 8.13 PPM
SAO 226680 16 21 42.24 -49 28 40.44 8.14 SAO
7 MGPS J162006-492251 16 20 06.41 -49 22 51.96 9.35 MGPS2
8 -4910571 16 21 43.37 -49 32 52.08 9.38 WACKERLING
9 MGPS J162009-493616 16 20 09.70 -49 36 16.92 10.37 MGPS2
PMN J1620-4936 16 20 09.79 -49 36 29.16 10.51 PMN
10 WDS J16218-4935 16 21 48.00 -49 34 59.88 11.14 WDS
11 WDS J16211-4940 16 21 06.00 -49 40 00.12 11.69 WDS
12 MGPS J162122-491734 16 21 22.51 -49 17 35.16 12.02 MGPS2
13 HD 330689 16 21 07.97 -49 40 23.88 12.14 HDEC
14 SAO 226658 16 19 52.63 -49 18 45.00 13.76 SAO
PPM 321598 16 19 52.58 -49 18 43.92 13.78 PPM
15 PPM 321595 16 19 50.23 -49 38 31.20 14.16 PPM
SAO 226656 16 19 50.16 -49 38 31.92 14.18 SAO
16 CD-4910578 16 21 57.46 -49 39 44.64 15.43 ACRS
HD 147070 16 21 57.48 -49 39 44.64 15.43 HIC
PPM 321633 16 21 57.48 -49 39 44.64 15.43 PPM
HIP 80174 16 21 57.48 -49 39 44.64 15.43 HIPPARCOS
SAO 226684 16 21 57.48 -49 39 46.44 15.45 SAO

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