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 J0657.4-4658

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J0657.4-4658 Swift-XRT detections in the field for 4FGL J0657.4-4658

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 06 56 45.44 -47 06 06.52 6.12 (6 ± 2) x 10-3 17 3.776 3.643
2 06 57 48.29 -46 54 21.31 6.21 (5 ± 2) x 10-3 20 3.531 3.546

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 06 57 34.17 -46 57 43.31 6.31 (2.8 ± 1.3) x 10-3 17 2.288 2.242
2 06 57 29.70 -47 11 03.35 6.41 (2.7 ± 1.4) x 10-3 10 2.340 1.965

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J0657.4-4658 Swift-XRT image with known radio, optical and UV sources for 4FGL J0657.4-4658

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 XMMSL2 J065623.6-464654 06 56 24.14 -46 46 51.96 15.99 XMM-NEWTON
HD 51797 06 56 23.54 -46 46 55.92 16.01 ROSAT
XMMSL2 J065623.6-464654 06 56 23.66 -46 46 53.76 16.02 XMM-NEWTON
XMMSL2 J065623.6-464654 06 56 23.66 -46 46 53.76 16.02 XMM-NEWTON
1RXS J065623.6-464650 06 56 23.59 -46 46 50.52 16.07 ROSAT
1RXS J065623.6-464650 06 56 23.59 -46 46 50.16 16.08 ROSAT
2RXS J065623.4-464650 06 56 23.42 -46 46 50.52 16.09 ROSAT
2RXS J065623.4-464650 06 56 23.42 -46 46 50.52 16.09 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 PGC 3081356 06 57 06.91 -46 59 09.96 3.34 PGC2003
2 PGC 509113 06 57 37.80 -46 54 33.84 4.67 PGC2003
3 PGC 509249 06 57 27.79 -46 53 54.96 4.90 PGC2003
4 PGC 507607 06 57 56.21 -47 01 27.12 5.73 PGC2003
5 PGC 507466 06 58 04.61 -47 02 06.00 7.30 PGC2003
6 NN 06 57 52.63 -46 51 11.16 8.85 ACRS
PPM 311322 06 57 52.66 -46 51 10.80 8.86 PPM
SAO 218347 06 57 52.56 -46 51 10.08 8.86 SAO
7 PPM 754486 06 57 57.48 -47 06 57.60 9.72 PPM
8 CD-46 2785 06 57 00.94 -46 48 49.32 10.89 ACRS
PPM 311303 06 57 00.96 -46 48 48.96 10.90 PPM
SAO 218331 06 57 00.84 -46 48 48.60 10.91 SAO
9 PPM 311299 06 56 45.29 -46 50 22.56 10.97 PPM
NN 06 56 45.24 -46 50 22.56 10.98 ACRS
SAO 218328 06 56 45.22 -46 50 21.48 10.99 SAO
10 GLEAM J065707-464747 06 57 07.80 -46 47 48.12 11.46 GLEAMEGCAT
SUMSS J065705-464746 06 57 05.71 -46 47 47.04 11.59 SUMSS
11 PGC 510668 06 57 36.50 -46 47 18.96 11.63 PGC2003
TGSSADR J065705.8-464743 06 57 05.81 -46 47 43.08 11.63 GMRTAS150M
12 SUMSS J065645-470932 06 56 45.19 -47 09 32.04 12.81 SUMSS
13 PPM 311291 06 56 30.74 -47 07 50.88 13.09 PPM
14 PPM 311287 06 56 23.57 -46 46 55.56 16.01 PPM
NSV 3304 06 56 23.50 -46 46 54.84 16.03 GCVSNSVARS

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