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 J2236.9+1839

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J2236.9+1839 Swift-XRT detections in the field for 4FGL J2236.9+1839

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 22 37 37.69 +18 45 45.32 5.96 (7 ± 2) x 10-3 20 4.264 4.182

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 22 36 59.68 +18 48 25.63 7.27 (3.2 ± 1.2) x 10-3 10 2.700 2.706

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J2236.9+1839 Swift-XRT image with known radio, optical and UV sources for 4FGL J2236.9+1839

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 X223704.72+184056.7 22 37 04.73 +18 40 56.64 1.55 CHANDRA
2CXO J223704.7+184056 22 37 04.75 +18 40 56.64 1.56 CHANDRA
2 2CXO J223708.5+183939 22 37 08.52 +18 39 39.60 2.13 CHANDRA
X223708.58+183940.6 22 37 08.59 +18 39 40.68 2.14 CHANDRA
3 2CXO J223651.5+184114 22 36 51.50 +18 41 14.28 2.30 CHANDRA
4 X223655.52+184218.3 22 36 55.51 +18 42 18.36 2.52 CHANDRA
5 X223651.82+184233.5 22 36 51.82 +18 42 33.48 3.17 CHANDRA
2CXO J223651.6+184232 22 36 51.65 +18 42 32.04 3.18 CHANDRA
6 2CXO J223704.5+183643 22 37 04.54 +18 36 43.92 3.45 CHANDRA
7 2CXO J223711.7+184153 22 37 11.74 +18 41 53.88 3.45 CHANDRA
X223704.48+183643.1 22 37 04.49 +18 36 43.20 3.46 CHANDRA
X223711.82+184152.9 22 37 11.83 +18 41 52.80 3.46 CHANDRA
8 X223708.26+183640.4 22 37 08.26 +18 36 40.32 3.89 CHANDRA
2CXO J223708.2+183639 22 37 08.23 +18 36 39.60 3.89 CHANDRA
9 2CXO J223714.2+183625 22 37 14.21 +18 36 25.92 4.95 CHANDRA
2CXO J223714.7+183626 22 37 14.76 +18 36 27.00 5.03 CHANDRA
10 2CXO J223719.9+183427 22 37 19.92 +18 34 27.84 7.32 CHANDRA
X223719.92+183427.3 22 37 19.92 +18 34 27.48 7.32 CHANDRA
11 2CXO J223701.5+183231 22 37 01.51 +18 32 31.20 7.47 CHANDRA
12 CXOGSG J223731.9+184216 22 37 31.97 +18 42 16.20 8.00 CHANDRA
2CXO J223731.9+184216 22 37 31.99 +18 42 16.56 8.00 CHANDRA
X223732.05+184217.0 22 37 32.04 +18 42 16.92 8.02 CHANDRA
13 X223732.13+183709.5 22 37 32.14 +18 37 09.48 8.20 CHANDRA
2CXO J223732.1+183709 22 37 32.14 +18 37 09.48 8.20 CHANDRA
CXOGSG J223732.1+183709 22 37 32.16 +18 37 09.48 8.21 CHANDRA
14 X223712.95+183206.6 22 37 12.96 +18 32 06.72 8.48 CHANDRA
15 X223732.34+183535.8 22 37 32.35 +18 35 35.88 8.91 CHANDRA
CXOGSG J223732.3+183535 22 37 32.40 +18 35 35.52 8.92 CHANDRA
16 2CXO J223739.8+183814 22 37 39.89 +18 38 15.00 9.69 CHANDRA
X223739.89+183815.1 22 37 39.89 +18 38 15.00 9.69 CHANDRA
CXOGSG J223739.9+183814 22 37 39.91 +18 38 15.00 9.70 CHANDRA
17 CXOGSG J223738.2+183638 22 37 38.28 +18 36 38.16 9.75 CHANDRA
2CXO J223738.2+183638 22 37 38.28 +18 36 38.16 9.75 CHANDRA
X223738.28+183638.3 22 37 38.28 +18 36 38.16 9.75 CHANDRA
18 2CXO J223735.1+184508 22 37 35.14 +18 45 08.28 9.87 CHANDRA
19 X223740.29+183712.4 22 37 40.30 +18 37 12.36 10.03 CHANDRA
CXOGSG J223740.2+183712 22 37 40.30 +18 37 12.36 10.03 CHANDRA
2CXO J223740.2+183712 22 37 40.30 +18 37 12.36 10.03 CHANDRA
20 X223719.03+183053.3 22 37 19.03 +18 30 53.28 10.19 CHANDRA
2CXO J223719.0+183053 22 37 19.08 +18 30 53.64 10.19 CHANDRA
2CXO J223741.6+183730 22 37 41.66 +18 37 31.08 10.26 CHANDRA
CXOGSG J223741.6+183731 22 37 41.66 +18 37 31.08 10.26 CHANDRA
X223741.67+183731.0 22 37 41.66 +18 37 31.08 10.26 CHANDRA
21 CXOGSG J223741.4+183643 22 37 41.45 +18 36 43.92 10.43 CHANDRA
2RXS J223736.3+184600 22 37 36.36 +18 46 00.84 10.59 ROSAT
2RXS J223736.3+184600 22 37 36.36 +18 46 00.84 10.59 ROSAT
22 2CXO J223737.6+184547 22 37 37.68 +18 45 47.16 10.72 CHANDRA
23 CXOGSG J223740.6+183500 22 37 40.66 +18 35 00.24 10.92 CHANDRA
X223740.69+183500.1 22 37 40.68 +18 35 00.24 10.93 CHANDRA
24 CXOGSG J223738.1+183319 22 37 38.16 +18 33 19.80 11.30 CHANDRA
X223738.19+183320.0 22 37 38.18 +18 33 20.16 11.30 CHANDRA
2CXO J223738.1+183319 22 37 38.18 +18 33 19.80 11.30 CHANDRA
25 2CXO J223741.1+184544 22 37 41.16 +18 45 44.64 11.41 CHANDRA
26 CXOGSG J223748.5+183935 22 37 48.55 +18 39 35.64 11.60 CHANDRA
27 CXOGSG J223747.5+183712 22 37 47.59 +18 37 12.00 11.70 CHANDRA
X223747.59+183712.1 22 37 47.59 +18 37 12.00 11.70 CHANDRA
2CXO J223747.5+183711 22 37 47.59 +18 37 12.00 11.70 CHANDRA
28 CXOGSG J223748.5+183741 22 37 48.50 +18 37 41.52 11.80 CHANDRA
X223748.50+183741.6 22 37 48.50 +18 37 41.52 11.80 CHANDRA
2CXO J223748.5+183741 22 37 48.50 +18 37 41.52 11.80 CHANDRA
29 X223747.81+183609.5 22 37 47.81 +18 36 09.36 12.04 CHANDRA
CXOGSG J223747.8+183609 22 37 47.81 +18 36 09.36 12.04 CHANDRA
2CXO J223747.8+183609 22 37 47.81 +18 36 09.36 12.04 CHANDRA
30 2CXO J223746.4+184457 22 37 46.44 +18 44 57.12 12.16 CHANDRA
31 X223725.08+182909.4 22 37 25.08 +18 29 09.24 12.39 CHANDRA
32 2CXO J223746.4+183421 22 37 46.49 +18 34 21.72 12.44 CHANDRA
X223746.47+183421.6 22 37 46.46 +18 34 21.72 12.44 CHANDRA
CXOGSG J223746.4+183421 22 37 46.49 +18 34 21.72 12.44 CHANDRA
33 2CXO J223745.6+183244 22 37 45.60 +18 32 44.16 13.09 CHANDRA
X223745.64+183244.5 22 37 45.65 +18 32 44.52 13.09 CHANDRA
CXOGSG J223745.6+183244 22 37 45.65 +18 32 44.52 13.09 CHANDRA
34 X223750.11+182847.7 22 37 50.11 +18 28 47.64 16.38 CHANDRA
2CXO J223750.1+182848 22 37 50.14 +18 28 48.00 16.38 CHANDRA

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
QORG J223704.6+184056 22 37 04.61 +18 40 55.92 1.52 QORGCAT
1 NVSS J223704+184057 22 37 04.80 +18 40 57.00 1.57 NVSS
2 PGC 1565829 22 37 05.71 +18 38 48.84 1.85 PGC2003
3 PGC 1567929 22 36 58.01 +18 42 50.04 2.88 PGC2003
TXS 2234+184 22 36 51.31 +18 42 32.04 3.22 TEXAS
TGSSADR J223651.2+184232 22 36 51.31 +18 42 32.04 3.23 GMRTAS150M
4 NVSS J223651+184232 22 36 51.31 +18 42 33.12 3.23 NVSS
VLSSr J223650.9+184233 22 36 50.90 +18 42 33.12 3.30 VLSSR
5 NVSS J223651+184507 22 36 51.91 +18 45 07.92 5.46 NVSS
6 PGC 1567623 22 36 38.30 +18 42 15.12 5.54 PGC2003
7 NVSS J223647+183347 22 36 47.81 +18 33 47.16 6.79 NVSS
TGSSADR J223647.8+183347 22 36 47.81 +18 33 47.16 6.80 GMRTAS150M
TGSSADR J223637.3+183456 22 36 37.30 +18 34 57.00 7.29 GMRTAS150M
VLSSr J223637.4+183455 22 36 37.39 +18 34 54.84 7.30 VLSSR
8 NVSS J223637+183455 22 36 37.30 +18 34 55.92 7.31 NVSS
TXS 2234+183 22 36 37.30 +18 34 54.84 7.32 TEXAS
GB6 J2236+1834 22 36 37.90 +18 34 35.04 7.46 GB6
9 2234+1819L 22 36 32.21 +18 35 26.88 7.91 NORTH20CM
10 NVSS J223732+183729 22 37 32.30 +18 37 28.92 8.13 NVSS
11 MCG+03-57-027 22 37 25.68 +18 47 34.80 9.79 MCG
12 NVSS J223739+184230 22 37 39.70 +18 42 29.88 9.84 NVSS
13 Unknown 22 37 30.00 +18 46 59.88 10.05 RC3
14 NVSS J223734+184631 22 37 34.70 +18 46 31.08 10.57 NVSS
TGSSADR J223734.6+184631 22 37 34.61 +18 46 32.16 10.57 GMRTAS150M
15 22351+1832 22 37 31.73 +18 47 26.16 10.65 ZCAT
PGC 69351 22 37 31.30 +18 47 33.00 10.66 PGC2003
16 PGC 1569506 22 37 37.70 +18 45 47.16 10.73 PGC2003
UGC 12119 22 37 31.68 +18 47 36.24 10.76 UGC
17 PGC 89515 22 36 48.60 +18 51 24.12 11.72 PGC2003
A2234+1836 22 36 50.11 +18 51 42.12 11.94 ZCAT
18 NVSS J223609+184135 22 36 09.41 +18 41 35.16 12.00 NVSS
19 PGC 1561289 22 37 28.01 +18 29 51.00 12.16 PGC2003
20 PGC 1561872 22 37 38.30 +18 31 03.00 12.80 PGC2003
21 NVSS J223635+182805 22 36 35.50 +18 28 05.88 13.18 NVSS
22 PPM 141631 22 36 26.57 +18 51 31.32 13.95 PPM
BD+18 5011 22 36 26.54 +18 51 31.32 13.95 ACRS
TGSSADR J223610.4+185047 22 36 10.39 +18 50 48.12 15.89 GMRTAS150M
23 NVSS J223610+185047 22 36 10.39 +18 50 48.12 15.90 NVSS
QORG J223610.3+185047 22 36 10.30 +18 50 47.04 15.91 QORGCAT

Penn State University Goddard Space Flight Center Swift