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 J0121.8-3917

Field

Detected Excesses

Swift-XRT image of the field for 3FGL J0121.8-3917 Swift-XRT detections in the field for 3FGL J0121.8-3917

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 01 21 52.53 -39 15 44.70 3.68 (9.4 ± 0.5) x 10-2 489 21.560 21.080
2 01 21 06.26 -39 10 11.40 4.30 (1.5 ± 0.2) x 10-2 82 8.777 8.184
3 01 22 23.51 -39 11 15.98 5.31 (4.8 ± 1.1) x 10-3 28 4.652 4.568
4 01 22 00.87 -39 09 59.52 6.12 (2.4 ± 0.8) x 10-3 16 2.987 3.038

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 01 21 25.71 -39 28 30.30 5.20 (2.6 ± 0.9) x 10-3 23 3.228 2.924
2 01 20 59.38 -39 22 29.87 6.78 (1.4 ± 0.6) x 10-3 10 2.258 2.302
3 01 21 34.08 -39 29 12.91 5.11 (1.9 ± 0.9) x 10-3 20 3.200 2.186
4 01 21 20.86 -39 27 55.51 5.08 (1.4 ± 0.7) x 10-3 15 2.490 1.954

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 3FGL J0121.8-3917 Swift-XRT image with known radio, optical and UV sources for 3FGL J0121.8-3917

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1RXS J012155.2-391543 01 21 55.20 -39 15 42.84 1.79 ROSAT
2RXS J012155.1-391541 01 21 55.18 -39 15 41.76 1.80 ROSAT
2RXS J012155.1-391541 01 21 55.18 -39 15 41.76 1.80 ROSAT
2 6dFGS J0121066-391013 01 21 06.55 -39 10 12.72 10.88 ROSAT
1RXS J012106.4-391005 01 21 06.41 -39 10 05.52 10.98 ROSAT
1RXS J012106.4-391005 01 21 06.41 -39 10 05.16 10.99 ROSAT
2RXS J012106.2-391004 01 21 06.29 -39 10 04.80 11.01 ROSAT
2RXS J012106.2-391004 01 21 06.29 -39 10 04.80 11.01 ROSAT
3 1RXS J012248.8-392350 01 22 48.79 -39 23 50.64 13.22 ROSAT
2RXS J012248.7-392352 01 22 48.72 -39 23 52.44 13.23 ROSAT
2RXS J012248.7-392352 01 22 48.72 -39 23 52.44 13.23 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J012152-391547 01 21 52.90 -39 15 47.88 1.50 NVSS
SUMSS J012152-391542 01 21 52.70 -39 15 42.84 1.56 SUMSS
2 MWACS J0122.1-3919 01 22 07.70 -39 19 09.84 4.01 MWACS
TGSSADR J012211.9-391939 01 22 12.00 -39 19 39.00 4.96 GMRTAS150M
GLEAM J012211-391940 01 22 11.90 -39 19 41.16 4.96 GLEAMEGCAT
SUMSS J012212-391939 01 22 12.10 -39 19 40.08 4.99 SUMSS
3 NVSS J012211-391943 01 22 11.90 -39 19 42.96 4.99 NVSS
SUMSS J012145-392232 01 21 45.00 -39 22 32.16 5.45 SUMSS
4 NVSS J012144-392242 01 21 44.81 -39 22 41.88 5.62 NVSS
5 NVSS J012139-392226 01 21 39.31 -39 22 27.12 5.65 NVSS
6 NVSS J012106-391826 01 21 06.60 -39 18 25.92 8.44 NVSS
SUMSS J012240-391935 01 22 40.61 -39 19 35.04 10.13 SUMSS
7 NVSS J012240-391935 01 22 40.70 -39 19 36.12 10.14 NVSS
8 NVSS J012104-392432 01 21 04.39 -39 24 32.04 11.46 NVSS
SPASS J012249-392304 01 22 49.39 -39 23 03.84 12.95 SPASS2P3GH
PKS J0122-3923 01 22 49.70 -39 23 04.92 13.01 PKSCAT90
PKS0120-396 01 22 49.70 -39 23 06.00 13.02 DIXON
ATPMN J012249.2-392321 01 22 49.20 -39 23 21.84 13.06 ATPMNCAT
GLEAM J012249-392318 01 22 49.39 -39 23 18.96 13.06 GLEAMEGCAT
0120-396 01 22 49.61 -39 23 17.16 13.08 MRC
TGSSADR J012249.6-392321 01 22 49.61 -39 23 21.84 13.13 GMRTAS150M
SUMSS J012249-392319 01 22 49.80 -39 23 20.04 13.14 SUMSS
9 NVSS J012249-392322 01 22 49.70 -39 23 22.92 13.16 NVSS
10 NVSS J012103-390727 01 21 03.91 -39 07 27.12 13.16 NVSS
ATPMN J012249.9-392321 01 22 49.99 -39 23 21.12 13.18 ATPMNCAT
MWACS J0122.8-3923 01 22 49.99 -39 23 22.92 13.20 MWACS
11 NVSS J012241-390806 01 22 41.11 -39 08 07.08 13.44 NVSS
12 NVSS J012052-392556 01 20 52.61 -39 25 57.00 14.11 NVSS
13 ATESP J012053-392856 01 20 53.90 -39 28 55.92 15.98 ATESP1P4GH

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