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 J0438.2-4243

Field

Detected Excesses

Swift-XRT image of the field for 4FGL J0438.2-4243 Swift-XRT detections in the field for 4FGL J0438.2-4243

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 04 38 32.32 -42 40 05.87 5.05 (9 ± 2) x 10-3 40 5.751 5.645
2 04 39 18.61 -42 42 46.91 6.12 (5.7 ± 1.3) x 10-3 21 4.182 4.308
3 04 39 05.38 -42 43 43.13 7.09 (2.9 ± 0.9) x 10-3 12 3.034 3.107

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 37 55.08 -42 39 55.68 6.65 (2.7 ± 1.0) x 10-3 13 2.838 2.825
2 04 38 48.26 -42 51 14.97 5.96 (2.0 ± 0.8) x 10-3 18 2.405 2.433
3 04 38 53.75 -42 40 24.91 7.97 (1.8 ± 0.8) x 10-3 9 2.273 2.294

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 4FGL J0438.2-4243 Swift-XRT image with known radio, optical and UV sources for 4FGL J0438.2-4243

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J043828.7-424004 04 38 28.75 -42 40 04.44 4.36 ROSAT
2RXS J043828.7-424004 04 38 28.75 -42 40 04.44 4.36 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 PGC 3097371 04 38 12.60 -42 38 43.08 4.54 PGC2003
2 GLEAM J043830-424010 04 38 30.91 -42 40 10.92 4.56 GLEAMEGCAT
SUMSS J043831-424006 04 38 31.90 -42 40 05.88 4.76 SUMSS
TGSSADR J043831.7-423958 04 38 31.70 -42 39 59.04 4.81 GMRTAS150M
3 PGC 557580 04 38 13.80 -42 48 51.12 5.60 PGC2003
4 PGC 560555 04 38 25.39 -42 38 08.16 5.64 PGC2003
5 PGC 560905 04 37 59.11 -42 37 00.84 6.72 PGC2003
6 PGC 557485 04 37 50.40 -42 49 09.84 7.17 PGC2003
7 PGC 561543 04 38 06.00 -42 34 44.04 8.61 PGC2003
8 PGC 558507 04 38 58.61 -42 45 19.08 8.70 PGC2003
9 TGSSADR J043841.0-425143 04 38 41.09 -42 51 43.92 9.95 GMRTAS150M
GLEAM J043841-425144 04 38 41.40 -42 51 43.92 9.99 GLEAMEGCAT
SUMSS J043841-425146 04 38 41.30 -42 51 46.08 10.01 SUMSS
10 PGC 561922 04 38 22.01 -42 33 21.96 10.04 PGC2003
11 PGC 557450 04 37 28.51 -42 49 18.84 10.11 PGC2003
12 SUMSS J043803-423307 04 38 03.79 -42 33 07.92 10.26 SUMSS
13 PGC 561868 04 37 49.10 -42 33 33.12 10.63 PGC2003
14 PGC 561455 04 38 56.69 -42 35 06.00 11.51 PGC2003
15 PGC 558299 04 37 11.21 -42 46 09.84 11.64 PGC2003
16 PGC 559939 04 37 10.10 -42 40 12.00 11.88 PGC2003
17 PGC 556088 04 37 35.50 -42 54 18.00 12.97 PGC2003
18 PGC 556351 04 37 24.79 -42 53 18.96 13.34 PGC2003
19 CD-43 1499 04 37 19.99 -42 52 29.28 13.35 ACRS
PPM 308850 04 37 19.99 -42 52 29.28 13.35 PPM
SAO 216900 04 37 19.99 -42 52 30.00 13.36 SAO
20 PGC 556201 04 37 19.51 -42 53 53.16 14.41 PGC2003
21 PGC 562268 04 39 09.70 -42 32 03.12 15.37 PGC2003

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