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 J1808.3-3356

Field

Detected Excesses

Swift-XRT image of the field for 2FGL J1808.3-3356 Swift-XRT detections in the field for 2FGL J1808.3-3356

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 08 12.16 -33 57 23.71 4.34 (2.1 ± 0.5) x 10-3 62 3.916 3.905
2 18 08 51.39 -33 56 48.72 4.31 (1.5 ± 0.4) x 10-3 55 4.175 3.672
3 18 08 52.72 -33 52 36.67 4.44 (1.5 ± 0.4) x 10-3 46 3.985 3.600
4 18 08 22.71 -33 56 46.77 4.23 (1.6 ± 0.4) x 10-3 80 3.737 3.492

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 18 08 18.16 -33 51 56.07 4.69 (1.1 ± 0.4) x 10-3 41 3.036 2.992
2 18 08 16.67 -34 02 38.76 4.57 (1.0 ± 0.4) x 10-3 36 2.853 2.722
3 18 08 21.05 -33 58 13.40 4.10 (1.2 ± 0.5) x 10-3 87 2.959 2.582
4 18 07 46.02 -33 53 25.43 4.43 (8 ± 3) x 10-4 36 2.691 2.525
5 18 08 21.05 -33 58 13.40 4.10 (1.0 ± 0.4) x 10-3 88 3.185 2.511
6 18 07 32.85 -33 57 51.90 4.42 (9 ± 4) x 10-4 26 2.632 2.491
7 18 08 31.85 -34 00 37.74 4.30 (8 ± 3) x 10-4 57 2.978 2.186

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 2FGL J1808.3-3356 Swift-XRT image with known radio, optical and UV sources for 2FGL J1808.3-3356


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 [PME2013] J1808-3355 18 08 14.59 -33 55 03.00 1.86 AT2FGLUS
[SPT2015] ATCA J1808-3355 18 08 14.59 -33 55 03.00 1.87 FER2FUSRID
2 NVSS J180823-335946 18 08 23.71 -33 59 47.04 3.71 NVSS
3 NVSS J180841-335103 18 08 41.21 -33 51 03.96 6.40 NVSS
[PME2013] J1807-3355 18 07 51.31 -33 55 32.88 6.41 AT2FGLUS
4 NVSS J180751-335529 18 07 51.31 -33 55 30.00 6.42 NVSS
[SPT2015] ATCA J1807-3355 18 07 51.19 -33 55 31.08 6.43 FER2FUSRID
MGPS J180751-335524 18 07 51.10 -33 55 23.88 6.45 MGPS2
TGSSADR J180750.7-335535 18 07 50.81 -33 55 36.12 6.51 GMRTAS150M
5 NVSS J180751-334827 18 07 51.91 -33 48 28.08 9.87 NVSS
TGSSADR J180751.8-334825 18 07 51.91 -33 48 24.84 9.90 GMRTAS150M
MGPS J180751-334825 18 07 51.79 -33 48 25.92 9.90 MGPS2
6 NVSS J180914-335415 18 09 14.71 -33 54 15.12 11.07 NVSS
7 NVSS J180825-334430 18 08 25.30 -33 44 30.12 11.60 NVSS
TGSSADR J180825.2-334428 18 08 25.30 -33 44 27.96 11.63 GMRTAS150M
MGPS J180825-334419 18 08 25.30 -33 44 18.96 11.78 MGPS2
8 NVSS J180727-334903 18 07 27.60 -33 49 04.08 13.30 NVSS
TGSSADR J180727.6-334903 18 07 27.60 -33 49 03.00 13.30 GMRTAS150M
MGPS J180727-334903 18 07 27.50 -33 49 03.00 13.32 MGPS2
TGSSADR J180725.4-340725 18 07 25.51 -34 07 26.04 16.32 GMRTAS150M
MGPS J180725-340731 18 07 25.39 -34 07 31.08 16.38 MGPS2
9 NVSS J180725-340732 18 07 25.39 -34 07 32.16 16.40 NVSS

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