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 J1539.1+1008

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1539.1+1008 Swift-XRT detections in the field for 4FGL J1539.1+1008

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 15 38 48.54 +10 18 47.09 4.59 (7.2 ± 1.3) x 10-3 44 6.023 5.574
2 15 39 15.84 +10 08 14.33 5.28 (3.6 ± 1.0) x 10-3 31 3.678 3.688

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 38 52.22 +10 19 21.05 4.61 (1.6 ± 0.8) x 10-3 17 2.685 1.869

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1539.1+1008 Swift-XRT image with known radio, optical and UV sources for 4FGL J1539.1+1008

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 XMMSL2 J153848.1+101839 15 38 48.02 +10 18 38.52 11.90 XMM-NEWTON
XMMSL2 J153848.1+101839 15 38 48.02 +10 18 38.52 11.90 XMM-NEWTON

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
FIRST J153858.3+100652 15 38 58.39 +10 06 52.92 3.17 FIRST
1 NVSS J153857+100655 15 38 57.50 +10 06 56.16 3.34 NVSS
2 FIRST J153853.2+100809 15 38 53.30 +10 08 09.96 4.18 FIRST
FIRST J153930.0+100738 15 39 30.00 +10 07 39.00 4.88 FIRST
FIRST J153930.7+100744 15 39 30.70 +10 07 45.12 5.05 FIRST
3 NVSS J153931+100747 15 39 31.01 +10 07 46.92 5.12 NVSS
TGSSADR J153931.1+100747 15 39 31.10 +10 07 48.00 5.13 GMRTAS150M
GLEAM J153931+100732 15 39 31.51 +10 07 32.88 5.25 GLEAMEGCAT
FIRST J153931.9+100753 15 39 31.90 +10 07 53.04 5.33 FIRST
4 PGC 214401 15 39 19.51 +10 14 30.12 6.82 PGC2003
FIRST J153858.7+101612 15 38 58.80 +10 16 12.00 8.61 FIRST
PGC 55730 15 39 38.90 +10 13 12.00 8.71 PGC2003
FIRST J153938.9+101311 15 39 38.90 +10 13 10.92 8.71 FIRST
QORG J153939.0+101312 15 39 39.00 +10 13 12.00 8.73 QORGCAT
UZC J153939.0+101312 15 39 39.00 +10 13 12.00 8.73 UZC
5 NVSS J153938+101317 15 39 38.81 +10 13 18.12 8.75 NVSS
6 NVSS J153858+101623 15 38 58.20 +10 16 23.88 8.84 NVSS
15373+1023 15 39 39.17 +10 13 19.56 8.84 ZCAT
Unknown 15 39 39.19 +10 13 19.92 8.85 RC3
QORG J153917.3+101713 15 39 17.30 +10 17 12.84 9.31 QORGCAT
7 FIRST J153917.2+101713 15 39 17.30 +10 17 13.92 9.32 FIRST
8 UGC 9956 15 39 41.83 +10 13 19.92 9.38 UGC
9 15362+1025 15 38 35.88 +10 15 15.84 11.11 ZCAT
10 PPM 161785 15 39 25.34 +09 57 31.68 11.18 PPM
BD+10 2887 15 39 25.34 +09 57 30.96 11.19 ACRS
SAO 101669 15 39 25.39 +09 57 30.96 11.19 SAO
UZC J153833.0+101504 15 38 33.00 +10 15 03.96 11.54 UZC
11 FIRST J153832.9+101503 15 38 32.90 +10 15 03.96 11.55 FIRST
PGC 55670 15 38 32.90 +10 15 03.96 11.56 PGC2003
12 SDSS J15388+1018 15 38 48.50 +10 18 42.84 11.92 VERONCAT
13 FIRST J153900.0+095607 15 39 00.00 +09 56 07.08 12.21 FIRST
14 SDSS J15396+0958 15 39 41.50 +09 58 06.96 12.58 VERONCAT
TGSSADR J153837.0+095801 15 38 37.10 +09 58 01.92 12.95 GMRTAS150M
FIRST J153837.0+095801 15 38 37.10 +09 58 00.84 12.95 FIRST
15 NVSS J153836+095801 15 38 37.01 +09 58 00.84 12.97 NVSS
16 Unknown 15 39 47.04 +09 58 32.16 13.14 NLTT

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