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 J1838.2+3223

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1838.2+3223 Swift-XRT detections in the field for 4FGL J1838.2+3223

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 38 16.92 +32 24 14.40 4.81 (7.4 ± 1.4) x 10-3 46 5.427 5.346
2 18 37 49.50 +32 25 57.14 5.28 (4.0 ± 1.0) x 10-3 26 4.045 3.920
3 18 37 38.24 +32 18 55.83 5.05 (3.6 ± 1.0) x 10-3 28 4.091 3.723
4 18 38 37.41 +32 30 39.70 5.17 (3.0 ± 1.0) x 10-3 22 3.204 3.161
5 18 38 09.98 +32 15 42.51 6.41 (2.3 ± 0.8) x 10-3 16 2.945 3.090

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 18 38 25.32 +32 24 15.04 5.44 (3.0 ± 1.0) x 10-3 21 3.185 2.980
2 18 37 43.29 +32 37 09.80 6.12 (2.7 ± 1.0) x 10-3 12 2.512 2.878
3 18 37 19.86 +32 24 22.73 5.08 (2.5 ± 0.9) x 10-3 22 2.947 2.846
4 18 37 40.72 +32 35 59.34 6.31 (2.2 ± 0.8) x 10-3 13 2.516 2.842
5 18 38 32.62 +32 21 22.13 5.96 (2.3 ± 0.8) x 10-3 16 2.818 2.765
6 18 37 36.49 +32 33 39.84 4.95 (2.3 ± 1.0) x 10-3 18 2.762 2.388
7 18 38 21.22 +32 35 08.94 6.12 (1.6 ± 0.7) x 10-3 9 2.362 2.366
8 18 37 31.24 +32 30 37.03 5.17 (1.8 ± 0.8) x 10-3 17 2.953 2.311
9 18 37 26.62 +32 28 16.31 5.08 (1.9 ± 0.9) x 10-3 20 2.932 2.210
10 18 38 33.05 +32 28 22.90 5.11 (1.6 ± 0.8) x 10-3 21 2.472 2.140
11 18 37 28.19 +32 28 54.76 4.97 (1.6 ± 0.8) x 10-3 18 2.427 2.101
12 18 37 28.19 +32 28 54.76 4.97 (1.7 ± 0.8) x 10-3 18 2.592 2.062
13 18 38 39.89 +32 32 20.45 5.53 (1.4 ± 0.7) x 10-3 15 2.492 2.052
14 18 38 32.69 +32 28 10.31 5.24 (1.6 ± 0.8) x 10-3 24 2.433 2.002
15 18 38 20.71 +32 21 32.62 5.28 (1.5 ± 0.8) x 10-3 23 2.484 1.945
16 18 37 36.50 +32 33 40.14 4.95 (1.6 ± 0.9) x 10-3 18 2.795 1.917
17 18 38 13.64 +32 17 20.23 5.53 (1.2 ± 0.7) x 10-3 21 2.945 1.798

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1838.2+3223 Swift-XRT image with known radio, optical and UV sources for 4FGL J1838.2+3223

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1RXS J183748.9+322527 18 37 48.91 +32 25 27.12 6.03 ROSAT
2RXS J183748.8+322527 18 37 48.84 +32 25 27.48 6.05 ROSAT
2RXS J183748.8+322527 18 37 48.84 +32 25 27.48 6.05 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 PGC 1996937 18 38 07.51 +32 26 20.04 3.04 PGC2003
2 PGC 1992436 18 38 40.20 +32 20 35.88 6.02 PGC2003
3 PGC 2000928 18 38 07.10 +32 31 30.00 7.79 PGC2003
WN 1835.8+3217 18 37 45.41 +32 19 41.88 7.86 WENSS
4 NVSS J183745+321940 18 37 45.41 +32 19 40.08 7.87 NVSS
5 PGC 1992059 18 38 49.20 +32 20 08.88 7.87 PGC2003
TGSSADR J183745.3+321940 18 37 45.29 +32 19 41.16 7.88 GMRTAS150M
VLSSr J183744.3+321940 18 37 44.30 +32 19 40.08 8.06 VLSSR
6 PGC 2811832 18 38 31.01 +32 16 01.92 8.51 PGC2003
7 LP Lyr 18 38 20.23 +32 32 44.88 8.80 GCVS
8 NVSS J183859+322356 18 38 59.40 +32 23 57.12 9.04 NVSS
9 PPM 81578 18 37 59.30 +32 15 18.72 9.40 PPM
BD+32 3164 18 37 59.26 +32 15 18.72 9.41 ACRS
10 SAO 67178 18 37 32.81 +32 25 44.76 9.41 SAO
PPM 81570 18 37 32.78 +32 25 44.76 9.42 PPM
SAO 67186 18 37 59.38 +32 15 17.28 9.42 SAO
BD+32 3161 18 37 32.76 +32 25 44.40 9.42 ACRS
WN 1837.1+3218 18 39 02.59 +32 20 52.08 10.20 WENSS
11 NVSS J183902+322051 18 39 03.00 +32 20 52.08 10.27 NVSS
TGSSADR J183903.1+322046 18 39 03.19 +32 20 47.04 10.35 GMRTAS150M
12 NVSS J183729+322108 18 37 29.21 +32 21 07.92 10.40 NVSS
13 PGC 1990340 18 37 36.60 +32 17 53.16 10.42 PGC2003
14 PGC 1989997 18 37 34.20 +32 17 27.96 11.07 PGC2003
15 PGC 2811811 18 38 21.60 +32 35 09.96 11.24 PGC2003
16 335- 10 18 37 36.62 +32 32 57.84 12.32 NLTT
17 4C+32.56 18 37 47.59 +32 35 17.16 12.85 DIXON
18 PGC 2000653 18 39 07.51 +32 31 09.12 12.91 PGC2003
19 SAO 67181 18 37 40.94 +32 35 05.64 13.43 SAO
PPM 81573 18 37 40.92 +32 35 06.72 13.44 PPM
BD+32 3162 18 37 40.92 +32 35 06.72 13.44 ACRS
20 BD+32 3172 18 38 58.58 +32 13 45.48 13.53 ACRS
HIP 91444 18 38 58.58 +32 13 45.48 13.53 HIPPARCOS
HD 172470 18 38 58.58 +32 13 45.48 13.53 HIC
PPM 81601 18 38 58.58 +32 13 45.12 13.54 PPM
SAO 67209 18 38 58.61 +32 13 44.76 13.54 SAO
21 PGC 2002948 18 39 07.01 +32 34 13.08 14.76 PGC2003
22 PGC 2003864 18 39 03.79 +32 35 26.16 15.18 PGC2003
23 PGC 2002987 18 39 12.10 +32 34 17.04 15.59 PGC2003

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