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 J2040.4+0312

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J2040.4+0312 Swift-XRT detections in the field for 4FGL J2040.4+0312

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 20 40 35.95 +03 14 32.45 5.31 (2.7 ± 0.8) x 10-3 21 3.372 3.295

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 40 44.01 +03 13 26.09 6.31 (1.8 ± 0.7) x 10-3 17 2.781 2.755
2 20 40 38.02 +03 09 40.42 6.12 (1.5 ± 0.6) x 10-3 16 2.364 2.471

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J2040.4+0312 Swift-XRT image with known radio, optical and UV sources for 4FGL J2040.4+0312

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1RXS J203953.4+031459 20 39 53.40 +03 14 59.64 8.59 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J204027+031124 20 40 27.79 +03 11 25.08 1.14 NVSS
FIRST J204027.8+031121 20 40 27.79 +03 11 21.84 1.19 FIRST
FIRST J204018.9+030855 20 40 18.91 +03 08 56.04 4.01 FIRST
2 NVSS J204018+030855 20 40 18.91 +03 08 56.04 4.02 NVSS
3 NVSS J204008+031049 20 40 08.40 +03 10 50.16 4.76 NVSS
FIRST J204008.0+031054 20 40 08.11 +03 10 54.12 4.82 FIRST
FIRST J204007.6+031053 20 40 07.61 +03 10 54.12 4.93 FIRST
4 PGC 1245183 20 40 32.21 +03 06 06.12 6.56 PGC2003
5 HIP 102028 20 40 34.68 +03 04 26.76 8.31 HIPPARCOS
PPM 170505 20 40 34.66 +03 04 26.40 8.32 PPM
HD 196974 20 40 34.68 +03 04 26.04 8.32 HIC
SAO 126095 20 40 34.70 +03 04 26.04 8.32 SAO
BD+02 4221 20 40 34.63 +03 04 25.68 8.33 ACRS
6 PPM 170518 20 40 53.93 +03 17 51.36 8.74 PPM
BD+02 4222 20 40 54.00 +03 17 51.00 8.74 ACRS
TGSSADR J204043.9+030359 20 40 43.90 +03 03 59.04 9.57 GMRTAS150M
7 NVSS J204043+030357 20 40 43.80 +03 03 56.88 9.59 NVSS
FIRST J204030.5+032210 20 40 30.50 +03 22 09.84 9.74 FIRST
FIRST J203957.3+030548 20 39 57.31 +03 05 48.84 9.85 FIRST
TGSSADR J203957.3+030546 20 39 57.31 +03 05 47.04 9.87 GMRTAS150M
8 NVSS J203957+030548 20 39 57.19 +03 05 48.12 9.88 NVSS
9 NVSS J204031+032222 20 40 31.20 +03 22 23.16 9.97 NVSS
FIRST J203957.0+030535 20 39 57.00 +03 05 35.88 10.05 FIRST
TGSSADR J204031.7+032228 20 40 31.80 +03 22 28.92 10.08 GMRTAS150M
FIRST J204032.1+032233 20 40 32.11 +03 22 33.96 10.18 FIRST
GLEAM J204031+032245 20 40 31.39 +03 22 45.84 10.35 GLEAMEGCAT
10 FIRST J203956.1+030501 20 39 56.11 +03 05 02.04 10.60 FIRST
11 FIRST J203941.3+031123 20 39 41.30 +03 11 24.00 11.28 FIRST
12 NVSS J204035+032410 20 40 35.21 +03 24 10.08 11.89 NVSS
FIRST J204035.7+032411 20 40 35.71 +03 24 11.88 11.94 FIRST
13 FIRST J204059.3+032254 20 40 59.40 +03 22 54.84 13.30 FIRST
14 SAO 126071 20 39 42.77 +03 23 30.48 15.47 SAO
PPM 170465 20 39 42.77 +03 23 30.84 15.48 PPM
BD+02 4216 20 39 42.77 +03 23 31.20 15.48 ACRS
FIRST J204112.2+032428 20 41 12.31 +03 24 28.08 16.59 FIRST
15 NVSS J204112+032429 20 41 12.31 +03 24 29.16 16.60 NVSS

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