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 (1.15 ± 0.12) x 10-2 101 9.642 9.648
2 16 20 56.28 -49 32 24.84 4.30 (3.8 ± 0.8) x 10-3 71 5.299 4.575
3 16 21 36.49 -49 27 48.95 4.35 (2.2 ± 0.7) x 10-3 53 3.798 3.093
4 16 20 50.85 -49 33 53.52 4.39 (2.3 ± 0.8) x 10-3 45 3.389 3.050

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 19 50.46 -49 32 10.60 4.48 (1.8 ± 0.7) x 10-3 24 3.231 2.795
2 16 20 19.42 -49 34 45.77 4.26 (1.5 ± 0.6) x 10-3 41 3.067 2.519
3 16 21 12.36 -49 18 51.88 4.64 (1.3 ± 0.5) x 10-3 26 2.542 2.501
4 16 21 07.16 -49 22 49.69 4.69 (1.6 ± 0.6) x 10-3 34 2.706 2.488
5 16 20 43.82 -49 36 17.62 4.52 (1.5 ± 0.6) x 10-3 38 2.677 2.480
6 16 21 25.39 -49 30 18.75 4.36 (1.5 ± 0.6) x 10-3 45 3.263 2.423
7 16 21 06.98 -49 32 39.00 4.37 (1.5 ± 0.7) x 10-3 51 3.334 2.301
8 16 20 25.13 -49 17 10.54 4.74 (1.1 ± 0.5) x 10-3 24 2.864 2.273
9 16 21 37.46 -49 28 01.00 4.37 (1.2 ± 0.5) x 10-3 55 3.106 2.265
10 16 20 57.07 -49 23 41.65 4.56 (1.6 ± 0.7) x 10-3 39 2.682 2.256
11 16 21 24.95 -49 30 17.13 4.35 (1.5 ± 0.7) x 10-3 48 2.723 2.242
12 16 20 43.42 -49 36 16.76 4.52 (1.2 ± 0.5) x 10-3 37 2.676 2.239
13 16 21 37.46 -49 28 01.00 4.37 (1.2 ± 0.6) x 10-3 52 2.589 2.046
14 16 21 10.07 -49 26 47.80 4.43 (1.3 ± 0.6) x 10-3 47 2.737 2.028
15 16 20 08.44 -49 35 36.16 4.35 (9 ± 5) x 10-4 46 2.716 1.781

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 3XMM J162109.2-493045s 16 21 09.17 -49 30 45.36 3.55 XMM-NEWTON
3XMM J162109.2-493045 16 21 09.29 -49 30 45.36 3.57 XMM-NEWTON
3XMM J162057.2-493221 16 20 57.26 -49 32 21.12 3.91 XMM-NEWTON
3XMM J162057.2-493222s 16 20 57.14 -49 32 21.84 3.92 XMM-NEWTON
2 X162057.85-493223.9 16 20 57.84 -49 32 24.00 3.98 CHANDRA
3 3XMM J162110.5-492509s 16 21 10.44 -49 25 09.48 4.50 XMM-NEWTON
3XMM J162110.4-492508 16 21 10.49 -49 25 09.12 4.51 XMM-NEWTON
4 X162038.14-493312.1 16 20 38.14 -49 33 12.24 5.19 CHANDRA
3XMM J162038.1-493317 16 20 38.11 -49 33 17.64 5.28 XMM-NEWTON
3XMM J162037.9-493318s 16 20 37.94 -49 33 18.36 5.30 XMM-NEWTON
5 3XMM J162050.9-493400 16 20 50.98 -49 34 00.84 5.49 XMM-NEWTON
3XMM J162050.8-493401s 16 20 50.83 -49 34 01.56 5.50 XMM-NEWTON
6 3XMM J162121.5-493204 16 21 21.55 -49 32 03.84 5.95 XMM-NEWTON
3XMM J162122.2-493202s 16 21 22.22 -49 32 02.40 6.02 XMM-NEWTON
7 3XMM J162012.7-493110 16 20 12.79 -49 31 10.92 6.91 XMM-NEWTON
3XMM J162012.7-493114s 16 20 12.72 -49 31 14.52 6.95 XMM-NEWTON
8 3XMM J162137.3-492841s 16 21 37.32 -49 28 40.44 7.35 XMM-NEWTON
3XMM J162137.3-492841 16 21 37.32 -49 28 41.88 7.35 XMM-NEWTON
9 AX J1621.4-4933 16 21 25.01 -49 33 42.12 7.43 INTEGRAL
AX J162125-4933 16 21 25.44 -49 33 43.20 7.50 ASCA
10 3XMM J162057.8-493632s 16 20 57.84 -49 36 32.04 8.06 XMM-NEWTON
11 3XMM J162141.6-492742s 16 21 41.59 -49 27 42.12 8.08 XMM-NEWTON
3XMM J162141.7-492741 16 21 41.74 -49 27 41.40 8.11 XMM-NEWTON
12 3XMM J162133.9-493309s 16 21 33.84 -49 33 08.64 8.20 XMM-NEWTON
3XMM J162133.8-493309 16 21 33.84 -49 33 09.36 8.20 XMM-NEWTON
13 3XMM J162019.2-493457 16 20 19.27 -49 34 57.36 8.34 XMM-NEWTON
14 3XMM J162144.4-493151s 16 21 44.40 -49 31 51.24 9.12 XMM-NEWTON
3XMM J162144.5-493151 16 21 44.57 -49 31 50.88 9.14 XMM-NEWTON
15 AX J1621.6-4934 16 21 37.99 -49 34 23.88 9.48 INTEGRAL
AX J162138-4934 16 21 38.16 -49 34 26.40 9.53 ASCA
16 3XMM J162117.2-493801 16 21 17.21 -49 38 02.04 10.34 XMM-NEWTON
3XMM J162117.7-493802s 16 21 17.66 -49 38 02.04 10.37 XMM-NEWTON
3XMM J162049.4-493910 16 20 49.44 -49 39 10.80 10.66 XMM-NEWTON
3XMM J162049.4-493911s 16 20 49.44 -49 39 11.16 10.67 XMM-NEWTON
17 CXOGSG J162049.5-493913 16 20 49.56 -49 39 12.96 10.70 CHANDRA
X162049.46-493913.5 16 20 49.46 -49 39 13.32 10.70 CHANDRA
18 3XMM J162120.5-493831 16 21 20.54 -49 38 31.56 11.01 XMM-NEWTON
3XMM J162120.4-493832s 16 21 20.45 -49 38 32.28 11.01 XMM-NEWTON
19 3XMM J162203.4-492425 16 22 03.50 -49 24 25.56 12.31 XMM-NEWTON
3XMM J162203.5-492423s 16 22 03.48 -49 24 22.68 12.32 XMM-NEWTON
20 1RXS J162124.4-491717 16 21 24.41 -49 17 17.16 12.41 ROSAT
21 CXOGSG J161952.3-493756 16 19 52.34 -49 37 56.28 13.51 CHANDRA
X161952.26-493756.3 16 19 52.25 -49 37 56.28 13.52 CHANDRA
22 3XMM J162140.4-493940s 16 21 40.37 -49 39 39.96 13.61 XMM-NEWTON
3XMM J162140.7-493938 16 21 40.75 -49 39 38.88 13.63 XMM-NEWTON
23 CXO J161946.2-493705 16 19 46.27 -49 37 05.52 13.69 CHANDRA
X161946.19-493705.4 16 19 46.20 -49 37 05.52 13.70 CHANDRA
CXOGSG J161946.1-493705 16 19 46.13 -49 37 05.16 13.70 CHANDRA
24 CXO J161950.2-493831 16 19 50.21 -49 38 31.56 14.16 CHANDRA
CXOGSG J161950.2-493831 16 19 50.21 -49 38 31.56 14.16 CHANDRA
X161950.20-493831.5 16 19 50.21 -49 38 31.56 14.17 CHANDRA
25 3XMM J162156.4-493837s 16 21 56.40 -49 38 36.60 14.50 XMM-NEWTON
26 CXO J161952.8-493923 16 19 52.85 -49 39 24.12 14.51 CHANDRA
X161952.86-493924.1 16 19 52.87 -49 39 24.12 14.51 CHANDRA
3XMM J162156.4-493836 16 21 56.47 -49 38 36.24 14.51 XMM-NEWTON
CXOGSG J161952.8-493924 16 19 52.82 -49 39 24.12 14.51 CHANDRA
3XMM J162159.2-493836 16 21 59.28 -49 38 35.88 14.83 XMM-NEWTON
3XMM J162159.2-493838s 16 21 59.16 -49 38 38.04 14.84 XMM-NEWTON
3XMM J162158.8-493842 16 21 58.85 -49 38 43.08 14.86 XMM-NEWTON
27 3XMM J162157.5-493941s 16 21 57.48 -49 39 40.68 15.38 XMM-NEWTON
28 AX J162155-4939 16 21 55.20 -49 40 01.20 15.38 ASCA
AX J1621.9-4939 16 21 57.50 -49 39 45.00 15.44 INTEGRAL
3XMM J162158.0-493940 16 21 58.90 -49 39 40.32 15.45 XMM-NEWTON
29 CXOGSG J161940.0-493849 16 19 40.80 -49 38 49.20 15.56 CHANDRA
X161940.02-493848.6 16 19 40.20 -49 38 48.48 15.57 CHANDRA

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 TGSSADR J162048.9-492744 16 20 48.89 -49 27 45.00 0.94 GMRTAS150M
2 PSR J1620-4927 16 20 41.50 -49 27 37.08 1.95 ATNFPULSAR
3 MGPS J162014-492955 16 20 14.21 -49 29 54.96 6.31 MGPS2
4 MGPS J162006-492251 16 20 06.41 -49 22 51.96 9.35 MGPS2
5 MGPS J162009-493616 16 20 09.70 -49 36 16.92 10.36 MGPS2
PMN J1620-4936 16 20 09.79 -49 36 29.16 10.50 PMN
6 MGPS J162122-491734 16 21 22.51 -49 17 35.16 12.02 MGPS2

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