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 J1655.9-3101

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1655.9-3101 Swift-XRT detections in the field for 4FGL J1655.9-3101

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 16 54 52.16 -30 57 13.87 5.76 (6 ± 2) x 10-3 19 3.855 3.791

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 16 56 19.04 -30 59 43.56 5.64 (3.7 ± 1.3) x 10-3 20 3.114 2.815
2 16 55 43.33 -30 54 18.52 6.65 (1.7 ± 0.9) x 10-3 11 2.281 1.839

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1655.9-3101 Swift-XRT image with known radio, optical and UV sources for 4FGL J1655.9-3101

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1RXS J165615.7-305502 16 56 15.70 -30 55 02.64 7.21 ROSAT
2RXS J165616.6-305502 16 56 16.63 -30 55 02.64 7.31 ROSAT
2 SACSTP J165622.4-305447 16 56 22.37 -30 54 46.44 8.21 SWIFT
3 SACSSP J165640.5-305238 16 56 40.54 -30 52 38.64 12.38 SWIFT
SACSTP J165640.6-305238 16 56 40.58 -30 52 37.92 12.40 SWIFT
SACSHP J165640.6-305237 16 56 40.56 -30 52 36.48 12.41 SWIFT
4 SACSTP J165654.5-305029 16 56 54.53 -30 50 29.04 16.05 SWIFT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 CD-3013619 16 56 08.69 -31 05 06.00 4.22 ACRS
PPM 748153 16 56 08.74 -31 05 06.72 4.24 PPM
2 NVSS J165626-310035 16 56 26.50 -31 00 34.92 5.84 NVSS
3 SAO 208220 16 56 36.94 -30 58 29.28 8.52 SAO
CD-3013625 16 56 37.10 -30 58 30.36 8.55 ACRS
PPM 295689 16 56 37.15 -30 58 30.00 8.56 PPM
4 HN Sco 16 55 26.66 -31 06 28.44 8.70 GCVS
5 HP Sco 16 56 35.93 -30 54 01.80 10.71 GCVS
6 CM Sco 16 56 50.02 -31 03 17.64 10.99 GCVS
7 HO Sco 16 56 34.08 -30 53 11.76 11.03 GCVS
8 NVSS J165638-310854 16 56 38.30 -31 08 53.88 11.22 NVSS
TGSSADR J165638.3-310855 16 56 38.40 -31 08 56.04 11.25 GMRTAS150M
MGPS J165638-310859 16 56 38.21 -31 08 58.92 11.26 MGPS2
9 NVSS J165641-305422 16 56 41.90 -30 54 21.96 11.46 NVSS
MGPS J165517-310930 16 55 17.59 -31 09 29.88 12.12 MGPS2
10 NVSS J165517-310928 16 55 17.40 -31 09 29.16 12.14 NVSS
11 NVSS J165539-304927 16 55 39.79 -30 49 27.12 12.64 NVSS
12 PPM 748170 16 56 55.22 -31 08 23.64 13.85 PPM
13 HIP 82791 16 55 08.33 -31 13 21.72 16.25 HIPPARCOS
CD-3113349 16 55 08.30 -31 13 21.72 16.25 ACRS
HD 152520 16 55 08.23 -31 13 21.72 16.27 HIC
SAO 208186 16 55 08.02 -31 13 21.36 16.29 SAO
14 WDS J16551-3113 16 55 06.00 -31 13 00.12 16.33 WDS

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