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.

3FGL J0221.2+2518

Field

Detected Excesses

Swift-XRT image of the field for 3FGL J0221.2+2518 Swift-XRT detections in the field for 3FGL J0221.2+2518

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 02 22 34.96 +25 08 10.46 3.88 (3.6 ± 0.3) x 10-2 195 14.710 13.090
2 02 20 51.07 +25 09 21.77 5.89 (2.8 ± 0.9) x 10-3 18 3.560 3.285
3 02 20 46.74 +25 16 12.78 6.65 (2.3 ± 0.7) x 10-3 15 3.074 3.120

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 02 21 12.20 +25 12 39.16 6.65 (1.8 ± 0.7) x 10-3 13 2.447 2.563

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 3FGL J0221.2+2518 Swift-XRT image with known radio, optical and UV sources for 3FGL J0221.2+2518

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 [MML2015] 5BZU J0220+2509 02 20 51.24 +25 09 27.72 10.60 null

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
[SPT2015] VLA J0221+2516 02 21 15.70 +25 16 58.08 1.39 FER2FUSRID
1 NVSS J022114+251659 02 21 15.00 +25 16 59.16 1.42 NVSS
2 NVSS J022126+251436 02 21 27.00 +25 14 35.88 4.37 NVSS
[SPT2015] VLA J0221+2514 02 21 27.00 +25 14 34.08 4.41 FER2FUSRID
3 NVSS J022125+252519 02 21 25.10 +25 25 19.92 7.23 NVSS
4 NVSS J022115+251050 02 21 15.19 +25 10 50.16 7.51 NVSS
5 NVSS J022038+251842 02 20 38.81 +25 18 42.12 8.60 NVSS
GLEAM J022038+251846 02 20 38.90 +25 18 47.16 8.60 GLEAMEGCAT
TGSSADR J022038.7+251841 02 20 38.81 +25 18 42.12 8.61 GMRTAS150M
6 0218+2456 02 20 54.10 +25 09 59.04 9.81 NORTH6CM
GB6 J0220+2509 02 20 53.21 +25 09 43.92 10.13 GB6
TXS 0217+249 02 20 51.19 +25 09 29.16 10.59 TEXAS
[MML2015] 5BZU J0220+2509 02 20 51.19 +25 09 28.08 10.60 ROMABZCAT
7 NVSS J022051+250926 02 20 51.19 +25 09 27.00 10.62 NVSS
TGSSADR J022051.2+250926 02 20 51.19 +25 09 25.92 10.62 GMRTAS150M
GLEAM J022051+250925 02 20 51.10 +25 09 25.92 10.64 GLEAMEGCAT
7C 021759.8+245536 02 20 51.41 +25 09 18.00 10.71 UC7C151MHZ
8 NVSS J022104+252842 02 21 04.80 +25 28 41.88 10.72 NVSS
VLSSr J022050.6+250920 02 20 50.71 +25 09 20.16 10.77 VLSSR
B2.2 0217+24 02 20 51.00 +25 09 11.88 10.85 DIXON
9 0218+2453L 02 21 12.60 +25 06 59.04 11.39 NORTH20CM
10 NVSS J022032+251255 02 20 32.50 +25 12 56.16 11.40 NVSS
TGSSADR J022032.3+251254 02 20 32.30 +25 12 55.08 11.43 GMRTAS150M
TGSSADR J022114.5+250652 02 21 14.50 +25 06 52.92 11.47 GMRTAS150M
11 NVSS J022114+250648 02 21 14.81 +25 06 47.88 11.54 NVSS
12 NVSS J022150+250860 02 21 50.40 +25 08 60.00 12.02 NVSS
13 NVSS J022207+252533 02 22 07.01 +25 25 33.96 13.44 NVSS

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