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 J0439.6-0538

Field

Detected Excesses

Swift-XRT image of the field for 1FGL J0439.6-0538 Swift-XRT detections in the field for 1FGL J0439.6-0538


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 04 40 15.82 -05 37 08.74 7.09 (2.2 ± 0.9) x 10-3 10 2.710 2.564
2 04 38 59.87 -05 38 14.41 5.76 (1.6 ± 0.9) x 10-3 8 2.274 1.925

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 1FGL J0439.6-0538 Swift-XRT image with known radio, optical and UV sources for 1FGL J0439.6-0538

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1RXS J044022.8-053020 04 40 22.80 -05 30 20.16 13.99 ROSAT
1RXS J044022.8-053020 04 40 22.80 -05 30 20.16 13.99 ROSAT
6dFGS J0440229-053011 04 40 22.87 -05 30 10.44 14.10 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J043942-053742 04 39 42.50 -05 37 41.88 1.57 NVSS
2 NVSS J043953-053554 04 39 53.90 -05 35 53.88 4.89 NVSS
QORG J043953.9-053553 04 39 53.90 -05 35 53.16 4.91 QORGCAT
3 NVSS J043922-053437 04 39 22.39 -05 34 36.84 5.77 NVSS
4 NVSS J043916-053302 04 39 16.99 -05 33 02.88 7.85 NVSS
5 NVSS J044012-053252 04 40 12.19 -05 32 52.08 10.36 NVSS
6 NVSS J043919-054901 04 39 19.90 -05 49 00.84 11.14 NVSS
7 HIP 21658 04 38 59.81 -05 46 24.96 12.18 HIPPARCOS
PPM 187165 04 38 59.78 -05 46 24.96 12.19 PPM
BD-06 954 04 38 59.78 -05 46 25.32 12.19 ACRS
HD 29552 04 38 59.76 -05 46 25.68 12.20 HIC
8 NVSS J044007-052907 04 40 07.90 -05 29 08.16 12.22 NVSS
SAO 131383 04 38 59.62 -05 46 25.32 12.22 SAO
9 NVSS J044000-052702 04 40 00.31 -05 27 02.88 13.03 NVSS
10 655- 48 04 40 22.58 -05 30 13.68 14.01 NLTT
11 NVSS J043857-052815 04 38 57.60 -05 28 14.88 14.65 NVSS
12 655- 45 04 38 52.27 -05 48 49.68 15.17 NLTT

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