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 J1957.6+1230

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1957.6+1230 Swift-XRT detections in the field for 4FGL J1957.6+1230


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 19 57 56.22 +12 34 01.82 6.78 (3.2 ± 1.2) x 10-3 12 2.481 2.645
2 19 57 57.42 +12 26 46.47 4.92 (3 ± 2) x 10-3 22 2.417 2.304
3 19 58 04.85 +12 24 19.11 4.83 (3 ± 2) x 10-3 21 2.782 2.146
4 19 58 11.71 +12 24 45.40 4.86 (2.4 ± 1.4) x 10-3 20 2.464 1.738

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1957.6+1230 Swift-XRT image with known radio, optical and UV sources for 4FGL J1957.6+1230

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J195651.0+123456 19 56 51.05 +12 34 56.64 11.85 ROSAT
2 1RXS J195723.0+121844 19 57 22.99 +12 18 43.92 12.38 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 HD 356358 19 57 32.26 +12 28 20.64 2.53 HDEC
PPM 137292 19 57 32.23 +12 28 20.64 2.53 PPM
SAO 105462 19 57 32.21 +12 28 20.64 2.54 SAO
BD+12 4153 19 57 32.21 +12 28 19.92 2.55 ACRS
2 HD 356359 19 57 58.27 +12 32 46.68 5.75 HDEC
3 NVSS J195758+123430 19 57 58.01 +12 34 31.08 6.54 NVSS
4 19557+1220 19 58 02.95 +12 28 09.48 6.97 ZCAT
5 BD+12 4150 19 57 07.22 +12 29 57.48 7.14 ACRS
PPM 137275 19 57 07.22 +12 29 56.76 7.14 PPM
HD 356356 19 57 07.22 +12 29 57.12 7.14 HDEC
SAO 105452 19 57 07.20 +12 29 57.12 7.15 SAO
6 HD 356354 19 57 32.38 +12 38 07.44 7.51 HDEC
7 HD 356357 19 57 02.93 +12 25 39.36 9.57 HDEC
8 HD 356353 19 57 40.03 +12 40 13.08 9.59 HDEC
9 HD 356372 19 57 53.02 +12 20 43.44 10.75 HDEC
10 NVSS J195800+123949 19 58 00.89 +12 39 50.04 10.94 NVSS
11 NVSS J195812+122412 19 58 12.60 +12 24 11.88 10.95 NVSS
12 WDS J19584+1235 19 58 24.00 +12 34 59.88 12.41 WDS
13 HD 356351 19 57 58.22 +12 42 38.52 13.11 HDEC
14 NVSS J195650+122339 19 56 50.59 +12 23 39.84 13.19 NVSS
15 HD 356371 19 58 13.22 +12 19 53.04 14.05 HDEC
16 WDS J19582+1219 19 58 12.00 +12 19 00.12 14.56 WDS

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