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 J0439.8-1857

Field

Detected Excesses
Swift-XRT image of the field for 1FGL J0439.8-1857 Swift-XRT detections in the field for 1FGL J0439.8-1857

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 04 39 49.53 -19 01 01.23 5.14 (5.9 ± 1.1) x 10-3 37 5.299 5.361
2 04 40 09.00 -18 51 02.21 5.20 (4.1 ± 1.0) x 10-3 27 4.845 4.333
3 04 39 24.29 -19 00 59.95 5.96 (2.5 ± 0.7) x 10-3 18 3.770 3.383
4 04 40 30.31 -19 04 41.40 5.89 (2.7 ± 0.8) x 10-3 17 3.295 3.271

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 1FGL J0439.8-1857 Swift-XRT image with known radio, optical and UV sources for 1FGL J0439.8-1857

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 SWIFT J043949.6-190101 04 39 49.68 -19 01 01.20 3.13 SWIFT
2 2RXS J044009.2-185057 04 40 09.29 -18 50 57.84 8.13 ROSAT
2RXS J044009.2-185057 04 40 09.29 -18 50 57.84 8.13 ROSAT
3 SWIFT J044029.8-190434 04 40 29.83 -19 04 34.68 11.24 SWIFT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
[SPT2015] ATCA J0439-1900 04 39 56.40 -19 00 25.92 2.76 FER2FUSRID
TGSSADR J043956.2-190027 04 39 56.30 -19 00 27.00 2.77 GMRTAS150M
1 NVSS J043956-190027 04 39 56.30 -19 00 28.08 2.78 NVSS
[PME2013] J0439-1900 04 39 56.30 -19 00 29.16 2.79 AT2FGLUS
GLEAM J043951-190050 04 39 51.31 -19 00 51.12 2.92 GLEAMEGCAT
PMN J0439-1900 04 39 48.70 -19 00 52.92 3.03 PMN
WISH B0437.6-1906A 04 39 49.90 -19 00 57.96 3.06 WISH
TGSSADR J043949.9-190058 04 39 49.90 -19 00 57.96 3.07 GMRTAS150M
WISH B0437.6-1906 04 39 51.10 -19 01 00.12 3.08 WISH
WISH B0437.6-1906B 04 39 56.11 -19 00 50.04 3.10 WISH
2 NVSS J043949-190059 04 39 49.90 -19 01 00.12 3.10 NVSS
[PME2013] J0439-1901 04 39 49.90 -19 01 00.84 3.11 AT2FGLUS
[SPT2015] ATCA J0439-1901 04 39 49.90 -19 01 00.84 3.11 FER2FUSRID
TGSSADR J043927.1-185820 04 39 27.19 -18 58 19.92 5.76 GMRTAS150M
GLEAM J043927-185823 04 39 27.19 -18 58 23.88 5.77 GLEAMEGCAT
WISH B0437.2-1904 04 39 27.10 -18 58 23.16 5.79 WISH
3 NVSS J043926-185830 04 39 26.90 -18 58 30.00 5.84 NVSS
4 NVSS J043930-185334 04 39 30.79 -18 53 34.08 6.55 NVSS
5 NVSS J043935-190656 04 39 35.40 -19 06 56.88 9.78 NVSS
GLEAM J043940-184808 04 39 40.30 -18 48 09.00 10.13 GLEAMEGCAT
6 NVSS J043939-184809 04 39 39.79 -18 48 09.00 10.15 NVSS
TGSSADR J043939.7-184806 04 39 39.79 -18 48 06.12 10.21 GMRTAS150M
WISH B0437.4-1853 04 39 40.01 -18 48 00.00 10.29 WISH
GLEAM J043912-185139 04 39 12.19 -18 51 38.88 11.20 GLEAMEGCAT
7 NVSS J043911-185141 04 39 11.81 -18 51 41.04 11.27 NVSS
TGSSADR J043911.7-185139 04 39 11.81 -18 51 38.88 11.30 GMRTAS150M
WISH B0436.9-1857 04 39 11.71 -18 51 36.00 11.34 WISH
GLEAM J043905-190145 04 39 05.90 -19 01 45.12 11.44 GLEAMEGCAT
8 NVSS J043905-190149 04 39 05.59 -19 01 49.08 11.53 NVSS
WISH B0436.8-1907 04 39 04.99 -19 01 33.96 11.59 WISH
9 NVSS J044012-190911 04 40 12.19 -19 09 11.88 12.29 NVSS
10 NVSS J044041-185335 04 40 41.11 -18 53 35.16 12.50 NVSS
WISH B0437.1-1853 04 39 22.20 -18 47 12.84 12.76 WISH
GLEAM J043922-184656 04 39 22.30 -18 46 55.92 12.98 GLEAMEGCAT
11 NVSS J043922-184655 04 39 22.20 -18 46 55.92 13.00 NVSS
TGSSADR J043922.2-184652 04 39 22.20 -18 46 53.04 13.03 GMRTAS150M
12 NVSS J043909-184737 04 39 09.41 -18 47 36.96 14.34 NVSS

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