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 J1721.3-5257

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1721.3-5257 Swift-XRT detections in the field for 4FGL J1721.3-5257


No detected excesses found.

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 21 20.45 -52 50 13.88 7.48 (3.2 ± 1.3) x 10-3 9 2.373 2.487
2 17 21 28.79 -52 53 32.09 6.78 (4 ± 2) x 10-3 12 2.345 2.384
3 17 20 44.44 -52 46 48.15 6.52 (3 ± 2) x 10-3 10 2.332 2.254

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1721.3-5257 Swift-XRT image with known radio, optical and UV sources for 4FGL J1721.3-5257


No known X-ray or gamma ray sources found.

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 CD-52 8084 17 20 53.23 -52 58 17.04 4.66 ACRS
SAO 244650 17 20 53.23 -52 58 17.76 4.67 SAO
PPM 345913 17 20 53.23 -52 58 17.40 4.67 PPM
2 269- 45 17 21 37.03 -53 02 55.68 6.13 NLTT
3 PGC 3079304 17 21 32.50 -53 04 23.88 7.38 PGC2003
4 PPM 772937 17 22 00.86 -52 51 26.64 8.05 PPM
5 CD-52 8104 17 22 20.95 -52 52 58.80 9.64 ACRS
SAO 244671 17 22 21.02 -52 52 58.80 9.66 SAO
PPM 345933 17 22 21.00 -52 52 58.08 9.66 PPM
HD 156792 17 22 21.02 -52 52 58.44 9.66 HIC
HIP 84994 17 22 21.07 -52 52 56.64 9.68 HIPPARCOS
6 MGPS J172113-524710 17 21 13.80 -52 47 09.96 10.09 MGPS2
7 PGC 3079295 17 20 18.41 -53 07 36.12 14.29 PGC2003
8 ESO 171836-5243.7 17 22 36.24 -52 46 33.60 15.28 ESOUPPSALA
Wray 16-266 17 22 36.86 -52 46 30.36 15.39 PLNEBULAE

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