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 J1821.8+0830

Field

Detected Excesses

Swift-XRT image of the field for 2FGL J1821.8+0830 Swift-XRT detections in the field for 2FGL J1821.8+0830


No detected excesses found.

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 21 46.91 +08 31 48.63 7.09 (5 ± 2) x 10-3 14 2.714 2.874
2 18 22 08.52 +08 24 13.57 6.93 (2.7 ± 1.4) x 10-3 10 2.185 1.884

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 2FGL J1821.8+0830 Swift-XRT image with known radio, optical and UV sources for 2FGL J1821.8+0830


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
[SPT2015] ATCA J1821+0832 18 21 43.80 +08 32 30.12 2.56 FER2FUSRID
[PME2013] J1821+0832 18 21 43.80 +08 32 30.12 2.56 AT2FGLUS
TGSSADR J182143.8+083231 18 21 43.90 +08 32 30.84 2.58 GMRTAS150M
1 NVSS J182143+083233 18 21 43.90 +08 32 33.00 2.60 NVSS
TGSSADR J182214.8+083720 18 22 14.90 +08 37 21.00 9.13 GMRTAS150M
2 NVSS J182215+083715 18 22 15.50 +08 37 15.96 9.17 NVSS
3 TGSSADR J182217.4+083656 18 22 17.40 +08 36 56.16 9.27 GMRTAS150M
4 NVSS J182233+082528 18 22 33.60 +08 25 27.84 11.81 NVSS
TGSSADR J182233.7+082531 18 22 33.79 +08 25 31.08 11.84 GMRTAS150M
5 NVSS J182117+083927 18 21 17.81 +08 39 27.00 12.04 NVSS
6 NVSS J182112+084051 18 21 12.60 +08 40 50.88 13.94 NVSS

Penn State University Goddard Space Flight Center Swift