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 J1648.7+4834

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1648.7+4834 Swift-XRT detections in the field for 4FGL J1648.7+4834

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 16 49 00.44 +48 34 13.66 4.97 (1.5 ± 0.3) x 10-2 44 6.189 5.899

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1648.7+4834 Swift-XRT image with known radio, optical and UV sources for 4FGL J1648.7+4834

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1RXS J164904.8+483540 16 49 04.80 +48 35 40.56 3.53 ROSAT
2RXS J164905.0+483541 16 49 05.04 +48 35 41.28 3.57 ROSAT
2RXS J164905.0+483541 16 49 05.04 +48 35 41.28 3.57 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J164859+483412 16 48 59.50 +48 34 12.00 2.26 NVSS
QORG J164900.2+483411 16 49 00.19 +48 34 10.92 2.36 QORGCAT
FIRST J164900.3+483412 16 49 00.29 +48 34 12.00 2.39 FIRST
2 PGC 2320300 16 48 28.61 +48 33 45.00 2.89 PGC2003
3 QORG J164905.8+483545 16 49 05.81 +48 35 44.88 3.71 QORGCAT
4 PGC 2322401 16 48 46.70 +48 39 06.12 5.08 PGC2003
5 UGC 10571 16 49 09.41 +48 37 52.32 5.46 UGC
6 PGC 2321806 16 48 19.20 +48 37 27.84 5.61 PGC2003
7 MCG+08-31-002 16 49 15.36 +48 36 54.00 5.65 MCG
8 FIRST J164838.1+482831 16 48 38.21 +48 28 31.08 5.65 FIRST
16478+4843 16 49 14.18 +48 37 23.88 5.76 ZCAT
Unknown 16 49 14.30 +48 37 24.96 5.78 RC3
UZC J164914.4+483725 16 49 14.40 +48 37 24.96 5.80 UZC
PGC 59055 16 49 14.40 +48 37 26.04 5.81 PGC2003
9 NVSS J164915+483730 16 49 15.00 +48 37 31.08 5.94 NVSS
QORG J164835.9+482708 16 48 35.90 +48 27 07.92 7.09 QORGCAT
FIRST J164836.1+482707 16 48 36.10 +48 27 06.84 7.10 FIRST
10 NVSS J164835+482707 16 48 35.90 +48 27 06.84 7.11 NVSS
11 FIRST J164759.2+483702 16 47 59.30 +48 37 03.00 8.29 FIRST
QORG J164759.2+483702 16 47 59.21 +48 37 01.92 8.30 QORGCAT
12 PPM 55674 16 47 51.94 +48 33 33.48 8.95 PPM
BD+48 2437 16 47 51.91 +48 33 33.48 8.95 ACRS
A 1647+48B 16 48 35.40 +48 42 50.04 8.98 RC3
1647+4848 16 48 35.33 +48 42 50.04 8.98 ZCAT
Mrk 500 16 48 35.33 +48 42 50.04 8.98 MARKARIAN
A 1647+48A 16 48 24.41 +48 42 23.04 9.09 RC3
1647+4847 16 48 24.36 +48 42 23.40 9.09 ZCAT
Mrk 499 16 48 24.36 +48 42 23.40 9.09 MARKARIAN
TGSSADR J164835.5+484258 16 48 35.50 +48 42 59.04 9.12 GMRTAS150M
PGC 59033 16 48 35.40 +48 43 01.92 9.18 PGC2003
QORG J164835.4+484302 16 48 35.40 +48 43 01.92 9.18 QORGCAT
13 NVSS J164835+484302 16 48 35.40 +48 43 01.92 9.18 NVSS
FIRST J164835.4+484302 16 48 35.40 +48 43 01.92 9.18 FIRST
14 NVSS J164824+484230 16 48 24.31 +48 42 29.88 9.20 NVSS
QORG J164824.0+484232 16 48 24.00 +48 42 32.04 9.25 QORGCAT
PGC 59028 16 48 24.10 +48 42 33.12 9.26 PGC2003
UZC J164824.1+484233 16 48 24.10 +48 42 33.12 9.26 UZC
FIRST J164824.1+484233 16 48 24.19 +48 42 33.12 9.26 FIRST
WN 1647.2+4848 16 48 36.60 +48 43 26.04 9.54 WENSS
QORG J164938.4+482903 16 49 38.40 +48 29 03.12 10.01 QORGCAT
15 FIRST J164938.4+482903 16 49 38.50 +48 29 03.12 10.02 FIRST
PGC 2318497 16 49 38.59 +48 29 03.12 10.04 PGC2003
16 FIRST J164904.0+482403 16 49 04.01 +48 24 02.88 10.42 FIRST
17 Unknown 16 48 12.00 +48 43 00.12 10.58 RC3
18 16469+4849 16 48 20.69 +48 44 02.04 10.84 ZCAT
PGC 59018 16 48 20.90 +48 44 08.16 10.92 PGC2003
19 UGC 10565 16 48 15.24 +48 43 48.36 11.02 UGC
20 NVSS J164927+482502 16 49 27.00 +48 25 01.92 11.27 NVSS
21 OS+482 16 49 54.60 +48 32 56.04 11.41 DIXON
22 FIRST J164921.3+484350 16 49 21.41 +48 43 50.88 11.43 FIRST
23 MCG+08-31-001 16 48 21.12 +48 44 49.20 11.55 MCG
24 PGC 2319781 16 47 35.40 +48 32 26.88 11.78 PGC2003
25 PGC 2324749 16 48 17.21 +48 44 58.92 11.94 PGC2003
26 NVSS J164734+483746 16 47 34.39 +48 37 46.92 12.41 NVSS
FIRST J164734.0+483748 16 47 34.10 +48 37 48.00 12.47 FIRST
27 FIRST J164939.6+484519 16 49 39.70 +48 45 19.08 14.36 FIRST

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