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 J2023.3-1947

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J2023.3-1947 Swift-XRT detections in the field for 4FGL J2023.3-1947


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 20 22 32.23 -19 46 52.32 7.71 (3.1 ± 1.2) x 10-3 10 2.551 2.671

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J2023.3-1947 Swift-XRT image with known radio, optical and UV sources for 4FGL J2023.3-1947


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 NVSS J202306-194730 20 23 06.19 -19 47 30.12 3.65 NVSS
2 NVSS J202337-194811 20 23 37.01 -19 48 11.16 3.79 NVSS
3 PGC 850011 20 23 39.10 -19 49 22.08 4.70 PGC2003
4 PGC 850972 20 23 01.90 -19 45 12.96 5.00 PGC2003
5 PGC 851221 20 23 39.00 -19 44 03.12 5.11 PGC2003
6 NVSS J202315-195322 20 23 15.60 -19 53 21.84 6.42 NVSS
7 PPM 237360 20 23 36.41 -19 53 07.08 6.95 PPM
8 BD-20 5919 20 23 47.06 -19 54 23.40 9.43 ACRS
PPM 237362 20 23 47.06 -19 54 23.40 9.43 PPM
SAO 189232 20 23 47.09 -19 54 23.40 9.44 SAO
9 PPM 237369 20 24 03.86 -19 46 28.92 9.96 PPM
10 NVSS J202247-194059 20 22 47.59 -19 40 59.88 10.07 NVSS
11 PPM 237331 20 22 35.33 -19 52 02.28 11.95 PPM
12 NVSS J202412-194847 20 24 12.50 -19 48 47.88 12.10 NVSS
TGSSADR J202412.5-194848 20 24 12.50 -19 48 47.88 12.10 GMRTAS150M
TGSSADR J202400.1-195618 20 24 00.19 -19 56 18.96 12.93 GMRTAS150M
13 NVSS J202400-195620 20 24 00.19 -19 56 21.12 12.95 NVSS
GLEAM J202400-195622 20 24 00.19 -19 56 22.92 12.98 GLEAMEGCAT
WISH B2021.1-2006 20 23 59.90 -19 56 33.00 13.06 WISH
14 NVSS J202408-195610 20 24 08.11 -19 56 09.96 14.21 NVSS
15 WDS J20242-1956 20 24 12.00 -19 55 59.88 14.82 WDS
16 NVSS J202409-193710 20 24 09.79 -19 37 10.92 15.07 NVSS

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