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 J1857.1+0056

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1857.1+0056 Swift-XRT detections in the field for 4FGL J1857.1+0056

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 56 55.37 +01 04 30.97 6.31 (1.4 ± 0.4) x 10-3 15 2.728 3.176

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 56 51.71 +01 14 47.44 5.11 (1.3 ± 0.4) x 10-3 16 3.338 2.966
2 18 56 31.20 +01 01 41.95 5.76 (10 ± 4) x 10-4 18 3.304 2.488
3 18 56 39.20 +01 14 15.50 4.81 (6 ± 4) x 10-4 18 2.892 1.655

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1857.1+0056 Swift-XRT image with known radio, optical and UV sources for 4FGL J1857.1+0056

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 4XMM J185719.6+005656 18 57 19.63 +00 56 56.76 2.00 XMM-NEWTON
4XMMs J185719.7+005657 18 57 19.70 +00 56 57.12 2.01 XMM-NEWTON
2 4XMM J185706.3+005422 18 57 06.38 +00 54 23.04 2.72 XMM-NEWTON
4XMMs J185706.3+005422 18 57 06.38 +00 54 22.68 2.73 XMM-NEWTON
3 4XMM J185656.2+005528 18 56 56.28 +00 55 28.20 4.06 XMM-NEWTON
4XMMs J185655.4+005534 18 56 55.39 +00 55 34.32 4.24 XMM-NEWTON
4 4XMMs J185713.4+010146 18 57 13.49 +01 01 46.56 5.04 XMM-NEWTON
4XMM J185713.4+010146 18 57 13.46 +01 01 46.92 5.04 XMM-NEWTON
5 4XMM J185704.5+010152 18 57 04.56 +01 01 51.96 5.41 XMM-NEWTON
4XMMs J185704.7+010153 18 57 04.75 +01 01 53.40 5.41 XMM-NEWTON
6 4XMMs J185709.0+005107 18 57 09.05 +00 51 07.56 5.67 XMM-NEWTON
7 4XMMs J185733.7+005822 18 57 33.72 +00 58 22.80 5.74 XMM-NEWTON
8 4XMM J185710.2+010235 18 57 10.25 +01 02 35.88 5.85 XMM-NEWTON
9 4XMM J185723.8+010151 18 57 23.88 +01 01 51.96 5.95 XMM-NEWTON
10 4XMMs J185649.4+010015 18 56 49.39 +01 00 15.48 6.58 XMM-NEWTON
11 4XMMs J185737.7+005740 18 57 37.75 +00 57 40.68 6.58 XMM-NEWTON
4XMM J185649.3+010015 18 56 49.39 +01 00 15.84 6.59 XMM-NEWTON
12 4XMMs J185738.4+005702 18 57 38.42 +00 57 02.52 6.69 XMM-NEWTON
4XMM J185738.4+005702 18 57 38.50 +00 57 02.16 6.71 XMM-NEWTON
13 4XMM J185710.9+010347 18 57 10.99 +01 03 47.88 7.04 XMM-NEWTON
14 4XMMs J185706.3+004917 18 57 06.36 +00 49 17.76 7.58 XMM-NEWTON
15 4XMMs J185730.8+010303 18 57 30.84 +01 03 03.24 7.91 XMM-NEWTON
4XMM J185730.9+010303 18 57 30.91 +01 03 03.60 7.92 XMM-NEWTON
16 4XMM J185642.4+010110 18 56 42.41 +01 01 10.56 8.55 XMM-NEWTON
4XMMs J185642.3+010113 18 56 42.31 +01 01 13.08 8.59 XMM-NEWTON
17 4XMMs J185705.3+010514 18 57 05.38 +01 05 14.64 8.63 XMM-NEWTON
4XMM J185705.3+010514 18 57 05.35 +01 05 14.64 8.63 XMM-NEWTON
18 4XMM J185659.5+010541 18 56 59.59 +01 05 41.64 9.43 XMM-NEWTON
4XMMs J185659.4+010541 18 56 59.47 +01 05 41.64 9.44 XMM-NEWTON
19 4XMM J185648.5+010426 18 56 48.58 +01 04 26.04 9.61 XMM-NEWTON
4XMMs J185648.2+010425 18 56 48.29 +01 04 25.32 9.64 XMM-NEWTON
20 4XMM J185726.2+004726 18 57 26.23 +00 47 26.52 10.00 XMM-NEWTON
21 4XMM J185659.2+004711 18 56 59.23 +00 47 11.04 10.07 XMM-NEWTON
4XMMs J185659.1+004711 18 56 59.16 +00 47 11.04 10.07 XMM-NEWTON
22 4XMM J185630.9+005607 18 56 30.91 +00 56 08.16 10.21 XMM-NEWTON
4XMMs J185630.8+005608 18 56 30.86 +00 56 08.16 10.22 XMM-NEWTON
23 4XMMs J185637.2+010216 18 56 37.22 +01 02 16.44 10.23 XMM-NEWTON
4XMM J185637.1+010216 18 56 37.27 +01 02 19.32 10.24 XMM-NEWTON
4XMM J185637.1+010216 18 56 37.13 +01 02 15.72 10.24 XMM-NEWTON
24 4XMMs J185704.1+004632 18 57 04.15 +00 46 32.52 10.39 XMM-NEWTON
25 4XMM J185744.8+005019 18 57 44.88 +00 50 19.32 10.50 XMM-NEWTON
26 4XMM J185629.5+005644 18 56 29.59 +00 56 44.52 10.53 XMM-NEWTON
4XMMs J185744.8+005017 18 57 44.88 +00 50 17.16 10.53 XMM-NEWTON
4XMMs J185629.5+005644 18 56 29.52 +00 56 44.16 10.54 XMM-NEWTON
27 4XMMs J185745.7+010302 18 57 45.74 +01 03 02.88 10.59 XMM-NEWTON
4XMM J185745.7+010303 18 57 45.74 +01 03 03.24 10.59 XMM-NEWTON
28 4XMMs J185655.0+010643 18 56 55.06 +01 06 43.92 10.80 XMM-NEWTON
4XMM J185655.0+010646 18 56 55.08 +01 06 46.44 10.84 XMM-NEWTON
29 4XMMs J185749.4+005117 18 57 49.49 +00 51 18.00 10.92 XMM-NEWTON
4XMM J185749.5+005118 18 57 49.51 +00 51 18.36 10.92 XMM-NEWTON
4XMMs J185651.7+010639 18 56 51.79 +01 06 39.96 11.08 XMM-NEWTON
30 2CXO J185651.8+010640 18 56 51.84 +01 06 41.04 11.09 CHANDRA
4XMM J185651.7+010641 18 56 51.79 +01 06 41.76 11.11 XMM-NEWTON
31 4XMM J185639.6+004858 18 56 39.67 +00 48 58.32 11.17 XMM-NEWTON
32 4XMM J185627.1+005815 18 56 27.17 +00 58 14.88 11.23 XMM-NEWTON
4XMMs J185627.1+005815 18 56 27.12 +00 58 15.96 11.24 XMM-NEWTON
33 4XMM J185755.3+010036 18 57 55.39 +01 00 37.08 11.58 XMM-NEWTON
4XMMs J185756.9+010051 18 57 56.93 +01 00 51.12 12.03 XMM-NEWTON
34 4XMM J185758.9+005919 18 57 58.99 +00 59 18.96 12.10 XMM-NEWTON
4XMMs J185759.0+005918 18 57 59.04 +00 59 18.60 12.11 XMM-NEWTON
35 4XMMs J185755.1+010246 18 57 55.18 +01 02 45.96 12.42 XMM-NEWTON
4XMM J185755.2+010243 18 57 55.30 +01 02 44.16 12.43 XMM-NEWTON
36 4XMM J185744.6+004703 18 57 44.64 +00 47 03.48 12.73 XMM-NEWTON
4XMMs J185744.7+004704 18 57 44.74 +00 47 03.84 12.74 XMM-NEWTON
37 4XMM J185633.0+010549 18 56 33.02 +01 05 48.12 13.24 XMM-NEWTON
4XMMs J185633.0+010548 18 56 33.00 +01 05 48.84 13.25 XMM-NEWTON
4XMM J185633.0+010549 18 56 33.17 +01 05 53.16 13.27 XMM-NEWTON
38 4XMMs J185751.3+004747 18 57 51.36 +00 47 47.76 13.37 XMM-NEWTON
4XMM J185638.2+010725 18 56 38.16 +01 07 25.32 13.56 XMM-NEWTON
4XMMs J185638.2+010726 18 56 38.23 +01 07 26.04 13.56 XMM-NEWTON
4XMM J185638.2+010725 18 56 38.30 +01 07 27.12 13.56 XMM-NEWTON
39 2CXO J185638.4+010728 18 56 38.45 +01 07 28.56 13.56 CHANDRA
4XMM J185638.6+010733 18 56 38.69 +01 07 33.96 13.60 XMM-NEWTON
40 4XMM J185631.5+010817 18 56 31.49 +01 08 12.84 15.24 XMM-NEWTON
4XMMs J185631.5+010814 18 56 31.49 +01 08 14.64 15.26 XMM-NEWTON
4XMM J185631.5+010817 18 56 31.94 +01 08 21.84 15.28 XMM-NEWTON
4XMM J185631.5+010817 18 56 31.75 +01 08 19.68 15.28 XMM-NEWTON
4XMM J185631.5+010817 18 56 31.39 +01 08 15.36 15.28 XMM-NEWTON
4XMM J185631.5+010817 18 56 31.39 +01 08 17.52 15.31 XMM-NEWTON

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 PSR J1857+0057 18 57 00.79 +00 57 16.92 2.77 ATNFPULSAR
2 NVSS J185702+010124 18 57 02.81 +01 01 23.88 5.15 NVSS
3 NVSS J185710+010223 18 57 10.20 +01 02 24.00 5.65 NVSS
4 NVSS J185723+010227 18 57 23.40 +01 02 26.88 6.40 NVSS
5 PGCC G34.36-0.94 18 57 22.90 +00 50 45.96 6.61 PLANCKGCC
6 NVSS J185705+010326 18 57 05.30 +01 03 27.00 6.87 NVSS
7 NVSS J185658+010300 18 56 58.51 +01 03 00.00 7.06 NVSS
8 BD-01 3607 18 57 23.30 +00 49 41.88 7.64 ACRS
9 NVSS J185644+010016 18 56 44.21 +01 00 15.84 7.72 NVSS
10 NVSS J185703+004915 18 57 03.41 +00 49 14.88 7.79 NVSS
11 NVSS J185743+005656 18 57 43.51 +00 56 57.12 7.96 NVSS
12 NVSS J185714+010447 18 57 14.59 +01 04 46.92 8.06 NVSS
13 NVSS J185721+010441 18 57 21.41 +01 04 41.16 8.29 NVSS
14 NVSS J185746+005754 18 57 46.61 +00 57 55.08 8.81 NVSS
15 LDN 617 18 57 32.54 +01 04 03.72 8.97 LDN
16 NVSS J185703+004731 18 57 03.91 +00 47 30.84 9.44 NVSS
17 1855-0052 18 57 49.70 +00 56 20.04 9.50 NORTH6CM
18 NVSS J185723+010608 18 57 23.30 +01 06 07.92 9.82 NVSS
19 [WBH2005] G34.300-0.745 18 56 35.11 +00 52 39.00 10.01 WBHGP20CM
20 NVSS J185633+005957 18 56 33.00 +00 59 57.12 10.18 NVSS
21 NVSS J185711+010658 18 57 11.90 +01 06 57.96 10.21 NVSS
22 BD-00 3603 18 56 53.40 +00 47 27.60 10.37 ACRS
23 NVSS J185749+010107 18 57 49.39 +01 01 06.96 10.38 NVSS
24 NVSS J185749+005119 18 57 49.51 +00 51 19.08 10.92 NVSS
[WBH2005] G34.422-1.031 18 57 49.61 +00 51 20.16 10.92 WBHGP20CM
TGSSADR J185749.6+005119 18 57 49.61 +00 51 19.08 10.93 GMRTAS150M
TXS 1855+007 18 57 49.70 +00 51 20.16 10.94 TEXAS
25 NVSS J185740+010505 18 57 40.80 +01 05 04.92 11.05 NVSS
26 PPM 166840 18 56 27.26 +00 58 15.96 11.21 PPM
BD+00 4059 18 56 27.24 +00 58 15.24 11.21 ACRS
SAO 124072 18 56 27.24 +00 58 14.88 11.21 SAO
27 NVSS J185735+010613 18 57 35.81 +01 06 12.96 11.22 NVSS
[WBH2005] G34.281-0.970 18 57 21.19 +00 45 29.88 11.52 WBHGP20CM
TGSSADR J185721.1+004528 18 57 21.19 +00 45 29.16 11.53 GMRTAS150M
28 NVSS J185719+010808 18 57 19.30 +01 08 08.88 11.55 NVSS
29 NVSS J185720+004522 18 57 20.81 +00 45 23.04 11.61 NVSS
30 [WBH2005] G34.424-1.047 18 57 53.21 +00 51 01.08 11.86 WBHGP20CM
31 NVSS J185650+004558 18 56 50.59 +00 45 57.96 12.01 NVSS
32 PSR J1856+0102 18 56 28.51 +01 02 11.04 12.08 ATNFPULSAR
33 NVSS J185737+010714 18 57 37.70 +01 07 14.16 12.33 NVSS
34 [WBH2005] G34.644-0.920 18 57 50.11 +01 06 12.96 13.48 WBHGP20CM
35 NVSS J185641+004506 18 56 41.11 +00 45 06.12 13.94 NVSS
36 VLSSr J185633.6+010730 18 56 33.60 +01 07 31.08 14.36 VLSSR
37 PPM 166892 18 57 52.87 +01 07 00.84 14.53 PPM
BD+00 4065 18 57 52.87 +01 07 00.84 14.53 ACRS
38 NVSS J185755+004705 18 57 55.80 +00 47 04.92 14.67 NVSS
[WBH2005] G34.374-1.087 18 57 56.30 +00 47 13.92 14.68 WBHGP20CM
39 NVSS J185756+010617 18 57 57.00 +01 06 16.92 14.80 NVSS
40 NVSS J185758+010837 18 57 58.20 +01 08 36.96 16.61 NVSS

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