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 J0540.6+5540

Field

Detected Excesses

Swift-XRT image of the field for 4FGL J0540.6+5540 Swift-XRT detections in the field for 4FGL J0540.6+5540

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 05 41 14.74 +55 50 42.47 6.04 (6 ± 2) x 10-3 20 3.685 3.731

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 05 41 00.14 +55 37 15.64 7.71 (2.0 ± 0.8) x 10-3 9 2.274 2.333
2 05 39 39.51 +55 46 24.24 6.78 (1.4 ± 0.8) x 10-3 8 2.313 1.896

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 4FGL J0540.6+5540 Swift-XRT image with known radio, optical and UV sources for 4FGL J0540.6+5540

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J054115.8+555102 05 41 15.86 +55 51 02.52 11.71 ROSAT
1RXS J054116.0+555105 05 41 16.01 +55 51 05.04 11.75 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
WN 0536.4+5538 05 40 38.30 +55 40 27.12 0.51 WENSS
TGSSADR J054038.3+554028 05 40 38.30 +55 40 27.84 0.52 GMRTAS150M
1 NVSS J054038+554030 05 40 38.11 +55 40 30.00 0.55 NVSS
QORG J054037.8+554032 05 40 37.80 +55 40 32.16 0.60 QORGCAT
2 LHS 1773 05 40 54.43 +55 43 24.60 3.53 REVISEDLHS
Unknown 05 40 54.24 +55 43 38.64 3.72 NLTT
TGSSADR J053950.2+554434 05 39 50.30 +55 44 34.08 8.40 GMRTAS150M
3 NVSS J053950+554436 05 39 50.40 +55 44 35.88 8.41 NVSS
WN 0535.6+5542 05 39 50.21 +55 44 34.08 8.41 WENSS
WN 0537.4+5541 05 41 38.11 +55 43 14.16 8.43 WENSS
TGSSADR J054138.2+554314 05 41 38.30 +55 43 14.16 8.45 GMRTAS150M
4 NVSS J054138+554317 05 41 38.11 +55 43 17.04 8.45 NVSS
VLSSr J054138.8+554306 05 41 38.90 +55 43 05.88 8.49 VLSSR
5 PRF290 05 40 33.60 +55 31 33.96 8.87 DIXON
6 PCCS2 044 G156.33+13.09 05 41 22.30 +55 47 13.92 8.93 PCCS044GHZ
7 NVSS J053951+554556 05 39 51.31 +55 45 56.88 9.06 NVSS
QORG J054126.6+553245 05 41 26.59 +55 32 44.88 9.89 QORGCAT
8 NVSS J054126+553245 05 41 26.81 +55 32 44.88 9.90 NVSS
PGC 165441 05 41 26.71 +55 32 44.16 9.91 PGC2003
A0537+5531 05 41 26.88 +55 32 44.16 9.92 ZCAT
TGSSADR J054152.9+553926 05 41 52.90 +55 39 27.00 10.06 GMRTAS150M
9 NVSS J054152+553924 05 41 52.90 +55 39 24.84 10.06 NVSS
QORG J054153.0+553928 05 41 52.99 +55 39 28.08 10.07 QORGCAT
WN 0537.7+5538 05 41 53.40 +55 39 29.88 10.11 WENSS
10 NVSS J054113+554934 05 41 13.20 +55 49 35.04 10.23 NVSS
TGSSADR J053938.1+553449 05 39 38.21 +55 34 50.16 10.55 GMRTAS150M
WN 0535.4+5533 05 39 38.21 +55 34 49.08 10.55 WENSS
11 NVSS J053938+553450 05 39 38.11 +55 34 50.88 10.56 NVSS
VLSSr J054116.2+555032 05 41 16.20 +55 50 31.92 11.27 VLSSR
WN 0537.0+5549 05 41 14.59 +55 50 40.92 11.30 WENSS
12 PCCS2 143 G156.28+13.11 05 41 21.31 +55 50 13.92 11.32 PCCS143GHZ
QORG J054114.6+555043 05 41 14.59 +55 50 43.08 11.34 QORGCAT
TGSSADR J054114.9+555042 05 41 15.00 +55 50 42.00 11.35 GMRTAS150M
13 NVSS J054114+555043 05 41 14.71 +55 50 43.08 11.35 NVSS
CRATES J054114+555049 05 41 14.81 +55 50 44.16 11.36 CRATES
GB6 J0541+5550 05 41 14.11 +55 50 48.84 11.40 GB6
0537+5549 05 41 13.99 +55 51 00.00 11.57 NORTH20CM
0537+5549 05 41 13.99 +55 51 00.00 11.57 NORTH6CM
14 NVSS J054010+555106 05 40 10.80 +55 51 06.12 11.61 NVSS
15 NVSS J053926+554545 05 39 26.81 +55 45 46.08 11.88 NVSS
16 PCCS2 100 G156.27+13.11 05 41 22.10 +55 50 53.16 11.95 PCCS100GHZ
17 NVSS J054205+553313 05 42 05.40 +55 33 14.04 13.78 NVSS
WN 0537.9+5531 05 42 05.40 +55 33 07.92 13.82 WENSS

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