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 J2048.4-2517

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J2048.4-2517 Swift-XRT detections in the field for 4FGL J2048.4-2517

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 20 49 09.25 -25 09 35.43 6.21 (5.5 ± 1.4) x 10-3 18 3.907 3.946
2 20 49 14.19 -25 20 52.34 6.52 (4.0 ± 1.2) x 10-3 15 3.079 3.366
3 20 49 17.84 -25 22 29.93 6.52 (4.0 ± 1.2) x 10-3 15 3.345 3.263
4 20 48 02.35 -25 08 36.28 6.21 (5 ± 2) x 10-3 12 3.212 3.015

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J2048.4-2517 Swift-XRT image with known radio, optical and UV sources for 4FGL J2048.4-2517

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J204739.5-251823 20 47 39.53 -25 18 23.76 10.35 ROSAT
2RXS J204739.5-251823 20 47 39.53 -25 18 23.76 10.35 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 SAO 189710 20 48 23.35 -25 15 47.16 1.80 SAO
CD-2515045 20 48 23.45 -25 15 44.64 1.83 ACRS
PPM 271643 20 48 23.45 -25 15 44.64 1.84 PPM
2 NVSS J204821-252023 20 48 21.60 -25 20 22.92 2.96 NVSS
GLEAM J204827-252256 20 48 27.91 -25 22 57.00 5.44 GLEAMEGCAT
3 NVSS J204828-252311 20 48 28.70 -25 23 12.12 5.71 NVSS
4 NVSS J204838-251123 20 48 38.50 -25 11 22.92 6.85 NVSS
5 NVSS J204753-251315 20 47 53.11 -25 13 15.96 8.42 NVSS
6 SPASS J204844-252634 20 48 43.99 -25 26 34.08 9.99 SPASS2P3GH
7 NVSS J204856-251026 20 48 56.30 -25 10 27.12 9.99 NVSS
PMN J2048-2526 20 48 41.11 -25 26 53.16 10.01 PMN
WISH B2045.7-2538 20 48 41.30 -25 26 53.16 10.03 WISH
8 NVSS J204841-252656 20 48 41.30 -25 26 57.12 10.08 NVSS
TGSSADR J204841.2-252657 20 48 41.21 -25 26 57.84 10.10 GMRTAS150M
TXS 2045-256 20 48 41.30 -25 26 57.84 10.11 TEXAS
GLEAM J204841-252700 20 48 41.11 -25 26 60.00 10.13 GLEAMEGCAT
2045-256 20 48 40.99 -25 27 09.00 10.26 MRC
WISH B2046.0-2520 20 49 01.99 -25 09 37.08 11.50 WISH
TGSSADR J204902.0-250935 20 49 02.11 -25 09 36.00 11.52 GMRTAS150M
GLEAM J204901-250930 20 49 01.80 -25 09 29.88 11.53 GLEAMEGCAT
9 NVSS J204902-250933 20 49 02.11 -25 09 33.84 11.55 NVSS
10 NVSS J204902-250827 20 49 02.90 -25 08 26.88 12.46 NVSS
11 PGC 778759 20 47 46.30 -25 27 24.12 13.21 PGC2003
12 PGC 781954 20 49 17.71 -25 10 00.12 14.07 PGC2003

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