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.

2FGL J0420.9-3743

Field

Detected Excesses

Swift-XRT image of the field for 2FGL J0420.9-3743 Swift-XRT detections in the field for 2FGL J0420.9-3743

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 04 21 45.81 -37 46 52.44 6.78 (3.1 ± 0.9) x 10-3 13 3.251 3.312

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 04 21 00.65 -37 47 46.60 6.41 (2.5 ± 0.9) x 10-3 13 2.790 2.782
2 04 20 25.39 -37 44 45.86 6.78 (2.6 ± 0.9) x 10-3 12 2.970 2.767
3 04 20 37.22 -37 36 19.02 6.78 (1.4 ± 0.7) x 10-3 9 2.318 2.124

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 2FGL J0420.9-3743 Swift-XRT image with known radio, optical and UV sources for 2FGL J0420.9-3743


No known X-ray or gamma ray sources found.

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J042115-374137 04 21 15.60 -37 41 38.04 4.34 NVSS
2 NVSS J042035-374512 04 20 35.40 -37 45 11.88 4.38 NVSS
GLEAM J042026-374443 04 20 26.11 -37 44 44.16 5.94 GLEAMEGCAT
3 NVSS J042025-374443 04 20 25.20 -37 44 43.08 6.13 NVSS
[SPT2015] ATCA J0420-3744 04 20 25.10 -37 44 44.88 6.15 FER2FUSRID
[PME2013] J0420-3744 04 20 25.10 -37 44 47.04 6.16 AT2FGLUS
SUMSS J042024-374445 04 20 24.89 -37 44 44.88 6.17 SUMSS
TGSSADR J042024.6-374449 04 20 24.60 -37 44 49.92 6.25 GMRTAS150M
4 NVSS J042141-373745 04 21 41.59 -37 37 45.84 10.69 NVSS
5 GLEAM J042142-373700 04 21 42.19 -37 37 00.12 11.20 GLEAMEGCAT
TGSSADR J042146.7-374833 04 21 46.70 -37 48 33.12 11.48 GMRTAS150M
SUMSS J042146-374830 04 21 46.90 -37 48 30.96 11.49 SUMSS
6 NVSS J042147-374830 04 21 46.99 -37 48 29.88 11.51 NVSS
GLEAM J042147-374831 04 21 47.21 -37 48 32.04 11.56 GLEAMEGCAT
7 NVSS J042008-373609 04 20 08.90 -37 36 10.08 11.58 NVSS
GLEAM J042008-373617 04 20 08.21 -37 36 16.92 11.61 GLEAMEGCAT
SUMSS J042024-373259 04 20 24.41 -37 32 58.92 11.93 SUMSS
SPASS J042149-374836 04 21 49.20 -37 48 37.08 11.95 SPASS2P3GH
8 NVSS J042024-373257 04 20 24.41 -37 32 57.12 11.96 NVSS
9 NVSS J042140-373515 04 21 40.30 -37 35 16.08 11.97 NVSS
10 NVSS J041954-374247 04 19 54.70 -37 42 47.88 11.97 NVSS
SUMSS J041954-374248 04 19 54.70 -37 42 48.96 11.98 SUMSS
TGSSADR J041954.6-374255 04 19 54.60 -37 42 56.16 11.99 GMRTAS150M
11 PMN J0421-3748 04 21 51.19 -37 48 59.04 12.47 PMN
12 NVSS J042145-375054 04 21 45.10 -37 50 53.88 12.48 NVSS
13 NVSS J042007-375137 04 20 07.70 -37 51 37.08 12.58 NVSS
SUMSS J042133-375316 04 21 33.91 -37 53 16.08 12.61 SUMSS
14 NVSS J042134-375316 04 21 34.01 -37 53 17.16 12.63 NVSS
TGSSADR J042133.8-375321 04 21 33.79 -37 53 21.12 12.67 GMRTAS150M
GLEAM J042135-375318 04 21 35.21 -37 53 18.96 12.80 GLEAMEGCAT
GLEAM J041959-375217 04 19 59.81 -37 52 18.12 14.21 GLEAMEGCAT
15 NVSS J041959-375216 04 19 59.09 -37 52 15.96 14.30 NVSS
SUMSS J041958-375217 04 19 58.99 -37 52 17.04 14.33 SUMSS
TGSSADR J041958.8-375218 04 19 58.80 -37 52 18.84 14.37 GMRTAS150M

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