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.

4FGL J0955.3-3949

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J0955.3-3949 Swift-XRT detections in the field for 4FGL J0955.3-3949

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 09 55 18.82 -39 40 10.83 4.18 (1.06 ± 0.13) x 10-2 89 8.479 8.135
2 09 55 27.29 -39 47 47.37 5.08 (3.5 ± 0.8) x 10-3 38 4.292 4.261
3 09 55 12.39 -39 52 04.61 5.05 (2.9 ± 0.8) x 10-3 31 3.900 3.833
4 09 54 51.79 -39 41 26.72 4.83 (2.6 ± 0.7) x 10-3 29 4.045 3.486

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 09 54 45.75 -39 41 50.86 4.90 (2.2 ± 0.8) x 10-3 29 3.378 2.943
2 09 55 07.38 -39 54 52.01 5.49 (1.7 ± 0.6) x 10-3 19 2.841 2.755
3 09 54 54.19 -39 54 10.68 5.35 (1.6 ± 0.6) x 10-3 15 3.024 2.743
4 09 55 14.81 -39 53 17.61 5.40 (1.3 ± 0.6) x 10-3 23 2.942 2.375

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J0955.3-3949 Swift-XRT image with known radio, optical and UV sources for 4FGL J0955.3-3949

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 SWIFT J095527.7-394748 09 55 27.74 -39 47 48.84 1.67 SWIFT
2 2RXS J095600.4-395421 09 56 00.41 -39 54 21.60 8.79 ROSAT
3 SWIFT J095518.9-394010 09 55 18.96 -39 40 10.56 9.10 SWIFT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 TGSSADR J095527.7-394755 09 55 27.70 -39 47 54.96 1.58 GMRTAS150M
2 NVSS J095458-394560 09 54 58.70 -39 46 00.12 5.72 NVSS
3 PGC 28626 09 55 26.40 -39 43 23.16 5.89 PGC2003
ESO 095322-3929.1 09 55 26.88 -39 43 22.80 5.90 ESOUPPSALA
4 PGC 181919 09 55 47.09 -39 53 02.04 5.95 PGC2003
QORG J095511.7-394318 09 55 11.69 -39 43 18.12 6.33 QORGCAT
5 NVSS J095511-394317 09 55 11.59 -39 43 17.04 6.35 NVSS
GLEAM J095530-395632 09 55 30.79 -39 56 31.92 7.44 GLEAMEGCAT
6 NVSS J095449-394520 09 54 49.80 -39 45 20.88 7.50 NVSS
7 NVSS J095530-395636 09 55 30.60 -39 56 35.88 7.50 NVSS
TGSSADR J095530.6-395636 09 55 30.70 -39 56 35.88 7.51 GMRTAS150M
SUMSS J095530-395637 09 55 30.70 -39 56 38.04 7.53 SUMSS
8 NVSS J095422-395919 09 54 22.90 -39 59 20.04 15.35 NVSS

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