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 J1520.9-3805

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1520.9-3805 Swift-XRT detections in the field for 4FGL J1520.9-3805

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 15 21 30.14 -38 13 10.29 5.02 (1.4 ± 0.2) x 10-2 39 5.649 5.997

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 20 53.38 -38 00 19.31 5.35 (3.3 ± 1.2) x 10-3 22 2.564 2.647
2 15 20 58.71 -38 03 45.01 5.53 (2.1 ± 1.0) x 10-3 20 2.696 2.087

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1520.9-3805 Swift-XRT image with known radio, optical and UV sources for 4FGL J1520.9-3805

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 Unknown 15 21 30.10 -38 13 09.12 10.37 ROSAT
2RXS J152130.3-381313 15 21 30.31 -38 13 13.44 10.45 ROSAT
2RXS J152130.3-381313 15 21 30.31 -38 13 13.44 10.45 ROSAT
1RXS J152130.3-381314 15 21 30.31 -38 13 14.16 10.46 ROSAT
1RXS J152130.3-381314 15 21 30.31 -38 13 14.52 10.46 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 PMN J1520-3800 15 20 56.59 -38 00 47.88 4.75 PMN
SUMSS J152053-380029 15 20 53.71 -38 00 29.16 5.05 SUMSS
GLEAM J152053-380029 15 20 53.71 -38 00 29.16 5.05 GLEAMEGCAT
TGSSADR J152053.7-380028 15 20 53.81 -38 00 29.16 5.06 GMRTAS150M
CRATES J152056-380048 15 20 53.81 -38 00 27.00 5.08 CRATES
CRATES J152056-380048 15 20 53.81 -38 00 27.00 5.08 CRATES
CRATES J152056-380048 15 20 53.81 -38 00 27.00 5.09 CRATES
2 NVSS J152053-380025 15 20 53.71 -38 00 24.84 5.11 NVSS
3 NVSS J152123-380742 15 21 23.30 -38 07 42.96 6.11 NVSS
SUMSS J152123-380746 15 21 23.40 -38 07 45.84 6.14 SUMSS
4 PGC 611491 15 20 31.39 -38 13 26.04 9.10 PGC2003
5 PGC 611838 15 20 17.71 -38 11 40.92 9.47 PGC2003
TGSSADR J152123.9-375713 15 21 24.00 -37 57 12.96 10.16 GMRTAS150M
SUMSS J152123-375710 15 21 23.81 -37 57 10.08 10.18 SUMSS
NVSS J15213-3757 15 21 24.00 -37 57 10.08 10.21 VERONCAT
6 NVSS J152123-375708 15 21 23.90 -37 57 09.00 10.21 NVSS
7 WDS J15215-3813 15 21 30.00 -38 13 00.12 10.25 WDS
GLEAM J152123-375704 15 21 23.81 -37 57 05.04 10.26 GLEAMEGCAT
HIP 75151 15 21 30.12 -38 13 06.96 10.35 HIPPARCOS
Rns 38740 15 21 30.10 -38 13 07.32 10.35 CPSTARS
HD 136347 15 21 30.12 -38 13 07.68 10.35 HIC
PPM 293743 15 21 30.19 -38 13 08.04 10.37 PPM
HR 5697 15 21 30.10 -38 13 09.12 10.37 BSC5P
SAO 206543 15 21 30.10 -38 13 09.12 10.37 SAO
CD-3710171 15 21 30.22 -38 13 08.04 10.37 ACRS
SAO 206544 15 21 30.36 -38 13 10.56 10.42 SAO
8 PPM 746797 15 20 55.92 -37 55 01.56 10.51 PPM
9 CD-3710169 15 21 25.78 -37 55 51.24 11.49 ACRS
PPM 293742 15 21 25.73 -37 55 50.88 11.49 PPM
HIP 75146 15 21 25.73 -37 55 50.16 11.50 HIPPARCOS
HD 136332 15 21 25.73 -37 55 50.16 11.50 HIC
GLEAM J152113-381636 15 21 13.30 -38 16 36.84 11.70 GLEAMEGCAT
SUMSS J152114-381639 15 21 14.30 -38 16 40.08 11.80 SUMSS
10 NVSS J152114-381639 15 21 14.50 -38 16 39.00 11.81 NVSS
11 NVSS J151954-380937 15 19 54.91 -38 09 38.16 12.38 NVSS
PGC 612290 15 19 54.31 -38 09 38.16 12.49 PGC2003
12 WDS J15215-3816 15 21 30.00 -38 16 00.12 12.60 WDS

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