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 J1532.3-3857

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1532.3-3857 Swift-XRT detections in the field for 4FGL J1532.3-3857

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 15 32 02.13 -38 47 04.87 4.56 (1.4 ± 0.2) x 10-2 54 6.686 6.527
2 15 33 20.60 -39 02 09.56 5.31 (6.4 ± 1.4) x 10-3 26 4.574 4.502
3 15 31 51.49 -38 59 12.08 5.82 (3.5 ± 1.1) x 10-3 19 3.153 3.149

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 15 32 39.52 -38 47 53.07 6.04 (2.1 ± 0.9) x 10-3 12 2.411 2.338
2 15 33 04.89 -39 02 06.15 6.65 (2.0 ± 0.9) x 10-3 9 2.409 2.266

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1532.3-3857 Swift-XRT image with known radio, optical and UV sources for 4FGL J1532.3-3857

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1RXS J153121.8-385531 15 31 21.79 -38 55 31.44 11.22 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J153209-390057 15 32 09.19 -39 00 56.88 3.71 NVSS
2 NVSS J153151-385904 15 31 51.50 -38 59 03.84 5.40 NVSS
3 PPM 746953 15 31 48.55 -39 00 38.52 6.50 PPM
TGSSADR J153159.4-385010 15 31 59.40 -38 50 09.96 8.39 GMRTAS150M
SUMSS J153159-385008 15 31 59.40 -38 50 08.16 8.43 SUMSS
4 NVSS J153159-385007 15 31 59.40 -38 50 07.08 8.43 NVSS
GLEAM J153159-385005 15 31 59.11 -38 50 06.00 8.48 GLEAMEGCAT
5 CD-3810416 15 31 26.16 -38 57 42.84 10.15 ACRS
SAO 206721 15 31 26.14 -38 57 43.92 10.16 SAO
PPM 293951 15 31 26.14 -38 57 42.48 10.16 PPM
WDS J15314-3858 15 31 24.00 -38 58 00.12 10.58 WDS
TGSSADR J153123.7-385751 15 31 23.81 -38 57 51.84 10.62 GMRTAS150M
6 NVSS J153123-385747 15 31 23.59 -38 57 47.88 10.65 NVSS
SUMSS J153123-385746 15 31 23.50 -38 57 46.08 10.66 SUMSS
GLEAM J153123-385731 15 31 23.40 -38 57 32.04 10.69 GLEAMEGCAT
TGSSADR J153230.3-390938 15 32 30.41 -39 09 38.16 12.16 GMRTAS150M
GLEAM J153230-390939 15 32 30.50 -39 09 38.88 12.18 GLEAMEGCAT
7 NVSS J153230-390940 15 32 30.50 -39 09 39.96 12.20 NVSS
SUMSS J153230-390940 15 32 30.41 -39 09 41.04 12.20 SUMSS
8 PGCC G334.27+14.09 15 32 42.41 -38 46 24.96 12.22 PLANCKGCC
9 CD-3810417 15 31 29.90 -38 49 31.08 12.49 ACRS
PPM 746947 15 31 29.83 -38 49 31.44 12.50 PPM
10 SAO 206747 15 33 08.47 -39 05 59.28 12.78 SAO
HD 138374 15 33 08.59 -39 05 59.64 12.80 HIC
CD-3810440 15 33 08.62 -39 05 59.64 12.80 ACRS
HIP 76141 15 33 08.64 -39 05 59.28 12.80 HIPPARCOS
PPM 293981 15 33 08.62 -39 05 59.64 12.80 PPM
11 NVSS J153317-384552 15 33 17.81 -38 45 52.92 16.54 NVSS

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