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 J1721.4+1131

Field

Detected Excesses

Swift-XRT image of the field for 4FGL J1721.4+1131 Swift-XRT detections in the field for 4FGL J1721.4+1131

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 17 21 03.35 +11 42 36.92 4.23 (2.6 ± 0.3) x 10-2 88 9.452 8.455
2 17 20 55.52 +11 40 33.06 4.47 (1.5 ± 0.2) x 10-2 54 7.067 6.407

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 17 22 01.26 +11 32 32.81 6.93 (2.7 ± 1.1) x 10-3 11 2.865 2.595
2 17 20 43.42 +11 36 45.81 5.96 (1.9 ± 0.9) x 10-3 12 2.311 2.095

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1721.4+1131 Swift-XRT image with known radio, optical and UV sources for 4FGL J1721.4+1131

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 XMMSL2 J172055.3+114030 17 20 55.37 +11 40 30.36 11.51 XMM-NEWTON
XMMSL2 J172055.3+114030 17 20 55.37 +11 40 30.36 11.51 XMM-NEWTON
2 XMMSL2 J172102.8+114236 17 21 03.65 +11 42 35.28 12.14 XMM-NEWTON
2RXS J172103.4+114236 17 21 03.43 +11 42 36.72 12.18 ROSAT
2RXS J172103.4+114236 17 21 03.43 +11 42 36.72 12.18 ROSAT
1RXS J172103.4+114237 17 21 03.41 +11 42 37.08 12.19 ROSAT
1RXS J172103.4+114237 17 21 03.41 +11 42 37.08 12.19 ROSAT
Unknown 17 21 03.29 +11 42 36.36 12.20 ROSAT
XMMSL2 J172102.8+114236 17 21 03.00 +11 42 36.00 12.22 XMM-NEWTON
XMMSL2 J172102.8+114236 17 21 03.00 +11 42 36.00 12.22 XMM-NEWTON
1RXS J172103.4+114237 17 21 03.00 +11 42 36.00 12.22 ROSAT
XMMSL2 J172102.8+114236 17 21 03.14 +11 42 42.84 12.31 XMM-NEWTON

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
MC2 1718+114 17 21 04.70 +11 25 59.88 7.71 DIXON
TXS 1718+114 17 21 03.70 +11 25 57.00 7.92 TEXAS
TGSSADR J172103.5+112557 17 21 03.50 +11 25 57.00 7.95 GMRTAS150M
1 NVSS J172103+112557 17 21 03.50 +11 25 57.00 7.96 NVSS
VLSSr J172103.7+112552 17 21 03.70 +11 25 51.96 7.98 VLSSR
GLEAM J172103+112549 17 21 03.91 +11 25 50.16 7.98 GLEAMEGCAT
1718+1128 17 21 03.41 +11 25 39.00 8.20 NORTH20CM
1718+1128 17 21 03.41 +11 25 39.00 8.20 NORTH6CM
GB6 J1721+1125 17 21 02.71 +11 25 46.92 8.21 GB6
2 NVSS J172146+113850 17 21 46.51 +11 38 51.00 8.74 NVSS
3 MITG J1721+1125 17 21 02.21 +11 25 05.88 8.80 MITGB6CM
4 PGC 3091192 17 21 53.81 +11 38 16.08 9.48 PGC2003
5 NVSS J172203+113550 17 22 03.79 +11 35 51.00 10.17 NVSS
6 NVSS J172040+113042 17 20 40.39 +11 30 42.12 11.16 NVSS
7 HD 157297 17 21 57.12 +11 40 19.92 11.53 HIC
SAO 102773 17 21 57.07 +11 40 21.00 11.53 SAO
PPM 133296 17 21 57.12 +11 40 20.28 11.53 PPM
HIP 84965 17 21 57.12 +11 40 20.28 11.53 HIPPARCOS
BD+11 3166 17 21 57.14 +11 40 20.28 11.53 ACRS
8 NVSS J172049+114029 17 20 49.51 +11 40 30.00 12.50 NVSS
9 NVSS J172045+112324 17 20 45.70 +11 23 24.00 12.88 NVSS
TGSSADR J172045.7+112321 17 20 45.79 +11 23 21.12 12.90 GMRTAS150M
10 NVSS J172204+114141 17 22 04.10 +11 41 42.00 13.68 NVSS
11 NVSS J172213+112007 17 22 13.61 +11 20 08.16 16.49 NVSS

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