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 J1756.3+0236

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1756.3+0236 Swift-XRT detections in the field for 4FGL J1756.3+0236

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 17 56 05.38 +02 26 12.22 5.70 (1.0 ± 0.2) x 10-2 25 4.534 4.723

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 17 56 23.95 +02 42 26.97 6.31 (1.9 ± 1.0) x 10-3 12 2.347 1.922

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1756.3+0236 Swift-XRT image with known radio, optical and UV sources for 4FGL J1756.3+0236

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J175605.1+022612 17 56 05.11 +02 26 12.84 11.38 ROSAT
1RXS J175605.1+022611 17 56 05.11 +02 26 11.40 11.40 ROSAT
1RXS J175605.1+022611 17 56 05.11 +02 26 11.04 11.41 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J175645+023933 17 56 45.41 +02 39 33.84 6.62 NVSS
2 V388 Oph 17 56 06.41 +02 43 42.60 7.78 GCVS
3 NVSS J175656+023945 17 56 56.50 +02 39 46.08 9.28 NVSS
4 PGC 201343 17 56 24.19 +02 48 23.04 11.54 PGC2003
CGMW 3-1009 17 56 23.95 +02 48 26.64 11.60 CGMW
VLSSr J175538.5+024136 17 55 38.50 +02 41 36.96 11.66 VLSSR
TXS 1753+026 17 55 37.99 +02 41 30.84 11.74 TEXAS
GLEAM J175537+024131 17 55 37.90 +02 41 31.92 11.77 GLEAMEGCAT
5 NVSS J175537+024130 17 55 37.80 +02 41 30.12 11.79 NVSS
TGSSADR J175537.7+024130 17 55 37.80 +02 41 30.12 11.80 GMRTAS150M
6 AT Oph 17 56 43.20 +02 25 48.36 12.35 GCVS
7 V983 Oph 17 55 37.99 +02 28 41.52 13.53 GCVS
BD+02 3428 17 55 37.99 +02 28 41.16 13.54 ACRS
PPM 164836 17 55 37.99 +02 28 41.16 13.54 PPM
TGSSADR J175537.3+024500 17 55 37.30 +02 45 01.08 13.65 GMRTAS150M
8 NVSS J175537+024459 17 55 37.20 +02 44 58.92 13.67 NVSS

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