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 J1951.6+2621

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1951.6+2621 Swift-XRT detections in the field for 4FGL J1951.6+2621

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 19 52 01.76 +26 15 09.43 5.59 (2.6 ± 0.7) x 10-3 21 3.844 3.773

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 19 52 12.46 +26 15 30.38 5.89 (1.5 ± 0.6) x 10-3 14 3.060 2.770
2 19 51 12.88 +26 27 36.94 6.12 (1.7 ± 0.6) x 10-3 11 2.846 2.747
3 19 51 22.47 +26 30 11.07 5.53 (1.4 ± 0.6) x 10-3 16 2.713 2.417
4 19 51 54.61 +26 15 31.98 6.41 (1.1 ± 0.5) x 10-3 9 2.368 2.191
5 19 51 22.47 +26 30 11.07 5.53 (10 ± 5) x 10-4 16 2.431 1.956

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1951.6+2621 Swift-XRT image with known radio, optical and UV sources for 4FGL J1951.6+2621

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2CXO J195112.5+262736 19 51 12.55 +26 27 36.36 8.78 CHANDRA
2 1RXS J195122.8+262956 19 51 22.80 +26 29 56.04 9.48 ROSAT
2RXS J195122.7+262956 19 51 22.73 +26 29 56.40 9.49 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 HD 339095 B 19 51 53.62 +26 23 26.88 3.89 HDEC
SAO 87836 19 51 53.09 +26 23 44.88 3.97 SAO
PPM 109885 19 51 53.11 +26 23 44.52 3.98 PPM
HD 339095 A 19 51 53.11 +26 23 44.52 3.98 HDEC
BD+26 3694 19 51 53.16 +26 23 44.52 3.98 ACRS
2 MITG J1951+2620 19 51 59.21 +26 20 39.84 4.47 MITGB6CM
1949+2613 19 51 59.40 +26 21 03.96 4.48 NORTH6CM
QORG J195200.0+262116 19 52 00.00 +26 21 15.84 4.61 QORGCAT
3 NVSS J195200+262116 19 52 00.10 +26 21 15.84 4.64 NVSS
CGPS J195200+262111 19 52 00.19 +26 21 11.88 4.67 CGPSNGPCAT
WSRTGP 1949+2613 19 52 00.29 +26 21 11.88 4.68 WSRTGP
MITG J1952+2621 19 52 01.61 +26 21 16.92 4.97 MITGB6CM
GB6 J1952+2620 19 52 02.40 +26 20 45.96 5.17 GB6
4 NVSS J195202+261946 19 52 01.99 +26 19 45.84 5.26 NVSS
5 NVSS J195202+262031 19 52 02.90 +26 20 30.84 5.31 NVSS
6 SAO 87832 19 51 45.22 +26 14 15.00 7.09 SAO
PPM 109882 19 51 45.22 +26 14 14.64 7.09 PPM
HD 187957 19 51 45.22 +26 14 14.64 7.09 HIC
BD+25 4002 19 51 45.22 +26 14 14.28 7.10 ACRS
HIP 97741 19 51 45.24 +26 14 13.92 7.10 HIPPARCOS
7 NVSS J195204+261616 19 52 04.20 +26 16 15.96 7.44 NVSS
8 WDS J19518+2614 19 51 48.00 +26 13 59.88 7.47 WDS
9 SAO 87830 19 51 37.22 +26 13 32.52 7.69 SAO
HIP 97730 19 51 37.20 +26 13 32.16 7.69 HIPPARCOS
PPM 109878 19 51 37.25 +26 13 32.16 7.70 PPM
HD 187943 19 51 37.25 +26 13 32.16 7.70 HIC
BD+25 4001 19 51 37.20 +26 13 31.80 7.70 ACRS
10 CGPS J195159+262726 19 51 59.71 +26 27 27.00 7.71 CGPSNGPCAT
11 HD 339094 19 51 54.58 +26 29 08.88 8.63 HDEC
PPM 109886 19 51 54.58 +26 29 08.88 8.63 PPM
BD+26 3695 19 51 54.58 +26 29 09.24 8.63 ACRS
SAO 87837 19 51 54.79 +26 29 08.52 8.64 SAO
12 HD 339096 19 52 14.93 +26 24 54.36 8.77 HDEC
PPM 109904 19 52 14.93 +26 24 54.36 8.77 PPM
BD+26 3697 19 52 14.95 +26 24 54.72 8.78 ACRS
13 1950+2610 19 52 18.70 +26 18 25.92 9.23 NORTH6CM
CGPS J195152+263037 19 51 52.61 +26 30 38.16 9.86 CGPSNGPCAT
14 NVSS J195152+263048 19 51 52.39 +26 30 47.88 10.03 NVSS
WSRTGP 1949+2623 19 51 52.10 +26 30 51.12 10.05 WSRTGP
15 BD+25 4003 19 52 17.93 +26 15 47.88 10.19 ACRS
SAO 87850 19 52 17.90 +26 15 47.16 10.19 SAO
HD 339103 19 52 17.95 +26 15 47.52 10.20 HDEC
PPM 109907 19 52 17.95 +26 15 47.52 10.20 PPM
16 V417 Vul 19 50 49.27 +26 19 45.48 11.33 GCVS
17 V355 Vul 19 51 15.02 +26 10 57.00 11.63 GCVS
WSRTGP 1950+2605 19 52 20.30 +26 13 27.84 12.01 WSRTGP
CGPS J195220+261326 19 52 20.40 +26 13 27.12 12.03 CGPSNGPCAT
[WBH2005] G62.978-0.469 19 52 20.40 +26 13 23.16 12.08 WBHGP20CM
18 NVSS J195220+261321 19 52 20.59 +26 13 22.08 12.12 NVSS
19 HD 339093 19 52 14.76 +26 30 36.00 12.28 HDEC
PPM 109903 19 52 14.76 +26 30 36.00 12.28 PPM
BD+26 3696 19 52 14.78 +26 30 36.00 12.28 ACRS
20 CGPS J195231+261621 19 52 31.10 +26 16 21.00 12.56 CGPSNGPCAT
TGSSADR J195101.7+260951 19 51 01.80 +26 09 51.12 14.15 GMRTAS150M
WSRTGP 1948+2602 19 51 01.51 +26 09 52.92 14.16 WSRTGP
CGPS J195101+260949 19 51 01.80 +26 09 50.04 14.17 CGPSNGPCAT
21 NVSS J195101+260946 19 51 01.80 +26 09 47.16 14.22 NVSS
[WBH2005] G62.964-0.509 19 52 27.70 +26 11 24.00 14.62 WBHGP20CM
CGPS J195228+261129 19 52 28.61 +26 11 29.04 14.70 CGPSNGPCAT
22 NVSS J195228+261127 19 52 28.61 +26 11 27.96 14.72 NVSS
TGSSADR J195228.7+261129 19 52 28.70 +26 11 30.12 14.72 GMRTAS150M
WSRTGP 1950+2603 19 52 28.61 +26 11 26.16 14.74 WSRTGP
[WBH2005] G62.968-0.513 19 52 29.11 +26 11 31.92 14.76 WBHGP20CM
VLSSr J195229.6+261135 19 52 29.71 +26 11 35.88 14.82 VLSSR
23 BD+26 3702 19 52 28.32 +26 33 01.80 16.11 ACRS
PPM 109916 19 52 28.39 +26 33 01.44 16.11 PPM
HD 339092 19 52 28.39 +26 33 01.44 16.11 HDEC
SAO 87858 19 52 28.51 +26 33 01.80 16.14 SAO

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