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 J1808.4-4521

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1808.4-4521 Swift-XRT detections in the field for 4FGL J1808.4-4521

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 09 09.17 -45 25 37.88 5.96 (4.2 ± 1.3) x 10-3 15 3.115 3.207

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 18 08 49.77 -45 15 06.92 6.41 (3.2 ± 1.2) x 10-3 14 2.575 2.667
2 18 08 16.17 -45 12 26.10 5.96 (2.6 ± 1.1) x 10-3 11 2.529 2.382

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1808.4-4521 Swift-XRT image with known radio, optical and UV sources for 4FGL J1808.4-4521


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 SAO 228728 18 08 15.84 -45 26 17.16 5.09 SAO
PPM 323763 18 08 15.82 -45 26 18.24 5.11 PPM
2 MSH 18-401 18 08 17.71 -45 27 32.04 6.21 DIXON
3 NSV 10211 18 07 48.70 -45 28 09.84 9.25 GCVSNSVARS
4 SAO 228737 18 08 45.12 -45 30 10.08 9.40 SAO
HIP 88885 18 08 45.14 -45 30 12.24 9.44 HIPPARCOS
PPM 323776 18 08 45.14 -45 30 12.24 9.44 PPM
HD 165536 18 08 45.17 -45 30 12.24 9.44 HIC
CD-4512218 18 08 45.14 -45 30 12.24 9.44 ACRS
5 WDS J18094-4522 18 09 24.00 -45 22 00.12 10.39 WDS
6 PPM 763267 18 07 54.58 -45 30 38.16 10.62 PPM
7 CGMW 4-198 18 09 06.91 -45 13 30.00 10.85 CGMW
8 TGSSADR J180855.0-453129 18 08 55.01 -45 31 30.00 11.34 GMRTAS150M
SUMSS J180854-453135 18 08 54.79 -45 31 35.04 11.40 SUMSS
GLEAM J180855-453137 18 08 55.30 -45 31 37.92 11.48 GLEAMEGCAT
9 V605 Ara 18 07 45.65 -45 31 12.72 11.95 GCVS
10 PPM 323747 18 07 20.62 -45 11 31.56 15.06 PPM

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