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 J1544.9+3218

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1544.9+3218 Swift-XRT detections in the field for 4FGL J1544.9+3218

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 15 44 33.23 +32 21 47.80 4.02 (1.24 ± 0.12) x 10-2 138 10.760 10.690
2 15 45 24.77 +32 27 59.40 4.34 (5.0 ± 0.8) x 10-3 60 7.205 6.557
3 15 44 45.95 +32 28 55.21 4.86 (3.3 ± 0.6) x 10-3 38 5.304 5.361
4 15 44 44.37 +32 25 39.85 5.08 (2.4 ± 0.5) x 10-3 32 4.475 4.648
5 15 45 38.85 +32 24 09.86 5.64 (1.9 ± 0.5) x 10-3 19 3.848 3.865
6 15 45 40.42 +32 16 23.22 5.76 (1.2 ± 0.4) x 10-3 18 3.170 3.081

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 15 44 57.04 +32 20 48.54 5.31 (1.4 ± 0.5) x 10-3 26 3.136 2.996
2 15 44 08.47 +32 26 33.63 5.53 (1.3 ± 0.5) x 10-3 20 3.000 2.806
3 15 44 11.50 +32 19 53.34 5.76 (1.0 ± 0.4) x 10-3 14 2.678 2.798
4 15 45 20.76 +32 28 12.48 4.45 (1.4 ± 0.5) x 10-3 24 3.778 2.788
5 15 44 50.35 +32 14 24.56 5.89 (9 ± 4) x 10-4 17 2.542 2.550

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1544.9+3218 Swift-XRT image with known radio, optical and UV sources for 4FGL J1544.9+3218

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1RXS J154433.1+322133 15 44 33.10 +32 21 33.48 6.12 ROSAT
2RXS J154433.3+322138 15 44 33.34 +32 21 38.52 6.13 ROSAT
2RXS J154433.3+322138 15 44 33.34 +32 21 38.52 6.13 ROSAT
1 XMMSL2 J154433.0+322151 15 44 32.95 +32 21 51.48 6.32 XMM-NEWTON
XMMSL2 J154433.0+322151 15 44 32.95 +32 21 51.48 6.32 XMM-NEWTON

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 FIRST J154508.0+321731 15 45 08.11 +32 17 30.84 2.37 FIRST
2 FIRST J154458.3+321408 15 44 58.30 +32 14 08.88 4.07 FIRST
3 FIRST J154517.1+321913 15 45 17.11 +32 19 13.08 4.29 FIRST
4 FIRST J154453.9+322251 15 44 54.00 +32 22 51.96 4.71 FIRST
5 FIRST J154522.2+322059 15 45 22.30 +32 20 58.92 5.95 FIRST
6 FIRST J154432.4+321453 15 44 32.50 +32 14 53.16 6.22 FIRST
7 FIRST J154430.4+321537 15 44 30.50 +32 15 38.16 6.24 FIRST
FIRST J154433.2+322149 15 44 33.19 +32 21 48.96 6.25 FIRST
QORG J154433.2+322149 15 44 33.19 +32 21 48.96 6.25 QORGCAT
8 NVSS J154433+322149 15 44 33.19 +32 21 50.04 6.26 NVSS
9 FIRST J154434.3+321409 15 44 34.39 +32 14 08.88 6.33 FIRST
FIRST J154431.5+321458 15 44 31.49 +32 14 58.92 6.34 FIRST
10 FIRST J154436.2+321330 15 44 36.19 +32 13 31.08 6.48 FIRST
11 15427+3236 15 44 43.15 +32 23 57.84 6.49 ZCAT
12 PGC 1991741 15 45 27.91 +32 19 44.04 6.63 PGC2003
13 FIRST J154526.1+322059 15 45 26.11 +32 20 58.92 6.68 FIRST
FIRST J154425.4+321752 15 44 25.51 +32 17 52.08 6.75 FIRST
PGC 55923 15 44 43.01 +32 24 15.12 6.76 PGC2003
14 FIRST J154437.4+321253 15 44 37.49 +32 12 52.92 6.78 FIRST
15 NVSS J154425+321750 15 44 25.30 +32 17 51.00 6.79 NVSS
QORG J154419.9+321925 15 44 19.90 +32 19 24.96 8.01 QORGCAT
16 FIRST J154419.8+321924 15 44 19.80 +32 19 23.88 8.02 FIRST
FIRST J154425.6+321348 15 44 25.70 +32 13 48.00 8.02 FIRST
17 NVSS J154425+321343 15 44 25.20 +32 13 44.04 8.13 NVSS
FIRST J154418.9+321943 15 44 18.89 +32 19 42.96 8.26 FIRST
18 FIRST J154450.6+320929 15 44 50.59 +32 09 29.88 8.83 FIRST
19 Unknown 15 44 36.00 +32 25 59.88 9.00 RC3
20 UGC 10006 15 44 40.44 +32 26 38.40 9.16 UGC
1542+3218 15 44 47.71 +32 09 12.96 9.22 NORTH20CM
1542+3218 15 44 47.71 +32 09 12.96 9.22 NORTH6CM
21 MITG J1544+3209 15 44 47.09 +32 09 12.96 9.25 MITGB6CM
4C+32.49 15 44 49.30 +32 09 02.88 9.32 DIXON
B2 1542+32 15 44 48.31 +32 09 02.88 9.36 DIXON
GB6 J1544+3208 15 44 48.31 +32 08 57.84 9.44 GB6
7C 154249.6+321808 15 44 48.50 +32 08 47.04 9.61 LD7C151MHZ
TGSSADR J154448.4+320846 15 44 48.41 +32 08 47.04 9.62 GMRTAS150M
22 FIRST J154413.8+321521 15 44 13.90 +32 15 20.88 9.63 FIRST
7C 154249.5+321807 15 44 48.41 +32 08 45.96 9.63 UC7C151MHZ
WN 1542.8+3218 15 44 48.31 +32 08 45.96 9.63 WENSS
VLSSr J154448.5+320845 15 44 48.50 +32 08 44.88 9.64 VLSSR
TXS 1542+323 15 44 48.41 +32 08 44.88 9.64 TEXAS
23 NVSS J154448+320845 15 44 48.41 +32 08 44.88 9.64 NVSS
FIRST J154448.3+320845 15 44 48.41 +32 08 44.88 9.65 FIRST
24 PGC 1989490 15 45 43.30 +32 16 46.92 9.81 PGC2003
25 FIRST J154453.8+320809 15 44 53.90 +32 08 09.96 10.07 FIRST
26 FIRST J154516.9+320841 15 45 16.99 +32 08 42.00 10.38 FIRST
27 FIRST J154544.4+322116 15 45 44.40 +32 21 16.92 10.41 FIRST
28 PGC 1998677 15 44 42.10 +32 28 30.00 10.78 PGC2003
29 FIRST J154452.1+320725 15 44 52.10 +32 07 24.96 10.85 FIRST
30 FIRST J154423.8+320845 15 44 23.90 +32 08 44.88 11.81 FIRST
NSV 7230 15 44 22.99 +32 08 52.08 11.84 GCVSNSVARS
31 FIRST J154408.0+322351 15 44 07.99 +32 23 52.08 11.86 FIRST
FIRST J154421.5+320812 15 44 21.60 +32 08 12.84 12.54 FIRST
32 NVSS J154421+320811 15 44 21.79 +32 08 11.04 12.54 NVSS
33 FIRST J154407.0+321102 15 44 07.01 +32 11 02.04 12.83 FIRST
34 FIRST J154415.6+320846 15 44 15.70 +32 08 47.04 12.91 FIRST
35 FIRST J154540.7+320846 15 45 40.70 +32 08 47.04 13.15 FIRST
36 PGC 1999412 15 45 30.50 +32 29 30.12 13.28 PGC2003
37 NVSS J154539+320719 15 45 39.00 +32 07 18.84 14.01 NVSS
FIRST J154540.3+320709 15 45 40.39 +32 07 09.84 14.31 FIRST
FIRST J154543.4+322859 15 45 43.51 +32 28 59.16 14.53 FIRST
38 NVSS J154543+322900 15 45 43.90 +32 29 00.96 14.61 NVSS

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